Replace asf4 tree with submodule repo adafruit/asf4, branch circuitpython.

54 files changed, 0 insertions, 10336 deletions

diff --git a/atmel-samd/asf4/samd21/hal/include/hal_adc_sync.h b/atmel-samd/asf4/samd21/hal/include/hal_adc_sync.h
deleted file mode 100644
index fb4604aa5..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_adc_sync.h
+++ /dev/null
@@ -1,287 +0,0 @@
-/**
- * \file
- *
- * \brief ADC functionality declaration.
- *
- * Copyright (C) 2014-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_ADC_SYNC_H_INCLUDED
-#define _HAL_ADC_SYNC_H_INCLUDED
-
-#include <hpl_adc_sync.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_adc_sync
- *
- * @{
- */
-
-/**
- * \brief ADC descriptor
- *
- * The ADC descriptor forward declaration.
- */
-struct adc_sync_descriptor;
-
-/**
- * \brief ADC descriptor
- */
-struct adc_sync_descriptor {
-	/** ADC device */
-	struct _adc_sync_device device;
-};
-
-/**
- * \brief Initialize ADC
- *
- * This function initializes the given ADC descriptor.
- * It checks if the given hardware is not initialized and if the given hardware
- * is permitted to be initialized.
- *
- * \param[out] descr An ADC descriptor to initialize
- * \param[in] hw     The pointer to hardware instance
- * \param[in] func   The pointer to a set of functions pointers
- *
- * \return Initialization status.
- */
-int32_t adc_sync_init(struct adc_sync_descriptor *const descr, void *const hw, void *const func);
-
-/**
- * \brief Deinitialize ADC
- *
- * This function deinitializes the given ADC descriptor.
- * It checks if the given hardware is initialized and if the given hardware is
- * permitted to be deinitialized.
- *
- * \param[in] descr An ADC descriptor to deinitialize
- *
- * \return De-initialization status.
- */
-int32_t adc_sync_deinit(struct adc_sync_descriptor *const descr);
-
-/**
- * \brief Enable ADC
- *
- * Use this function to set the ADC peripheral to enabled state.
- *
- * \param[in] descr    Pointer to the ADC descriptor
- * \param[in] channel  Channel number
- *
- * \return Operation status
- *
- */
-int32_t adc_sync_enable_channel(struct adc_sync_descriptor *const descr, const uint8_t channel);
-
-/**
- * \brief Disable ADC
- *
- * Use this function to set the ADC peripheral to disabled state.
- *
- * \param[in] descr   Pointer to the ADC descriptor
- * \param[in] channel Channel number
- *
- * \return Operation status
- *
- */
-int32_t adc_sync_disable_channel(struct adc_sync_descriptor *const descr, const uint8_t channel);
-
-/**
- * \brief Read data from ADC
- *
- * \param[in] descr    The pointer to the ADC descriptor
- * \param[in] channel  Channel number
- * \param[in] buf      A buffer to read data to
- * \param[in] length   The size of a buffer
- *
- * \return The number of bytes read.
- */
-int32_t adc_sync_read_channel(struct adc_sync_descriptor *const descr, const uint8_t channel, uint8_t *const buffer,
-                              const uint16_t length);
-
-/**
- * \brief Set ADC reference source
- *
- * This function sets ADC reference source.
- *
- * \param[in] descr     The pointer to the ADC descriptor
- * \param[in] reference A reference source to set
- *
- * \return Status of the ADC reference source setting.
- */
-int32_t adc_sync_set_reference(struct adc_sync_descriptor *const descr, const adc_reference_t reference);
-
-/**
- * \brief Set ADC resolution
- *
- * This function sets ADC resolution.
- *
- * \param[in] descr      The pointer to the ADC descriptor
- * \param[in] resolution A resolution to set
- *
- * \return Status of the ADC resolution setting.
- */
-int32_t adc_sync_set_resolution(struct adc_sync_descriptor *const descr, const adc_resolution_t resolution);
-
-/**
- * \brief Set ADC input source of a channel
- *
- * This function sets ADC positive and negative input sources.
- *
- * \param[in] descr     The pointer to the ADC descriptor
- * \param[in] pos_input A positive input source to set
- * \param[in] neg_input A negative input source to set
- * \param[in] channel   Channel number
- *
- * \return Status of the ADC channels setting.
- */
-int32_t adc_sync_set_inputs(struct adc_sync_descriptor *const descr, const adc_pos_input_t pos_input,
-                            const adc_neg_input_t neg_input, const uint8_t channel);
-
-/**
- * \brief Set ADC conversion mode
- *
- * This function sets ADC conversion mode.
- *
- * \param[in] descr The pointer to the ADC descriptor
- * \param[in] mode  A conversion mode to set
- *
- * \return Status of the ADC conversion mode setting.
- */
-int32_t adc_sync_set_conversion_mode(struct adc_sync_descriptor *const descr, const enum adc_conversion_mode mode);
-
-/**
- * \brief Set ADC differential mode
- *
- * This function sets ADC differential mode.
- *
- * \param[in] descr   The pointer to the ADC descriptor
- * \param[in] channel Channel number
- * \param[in] mode    A differential mode to set
- *
- * \return Status of the ADC differential mode setting.
- */
-int32_t adc_sync_set_channel_differential_mode(struct adc_sync_descriptor *const descr, const uint8_t channel,
-                                               const enum adc_differential_mode mode);
-
-/**
- * \brief Set ADC channel gain
- *
- * This function sets ADC channel gain.
- *
- * \param[in] descr   The pointer to the ADC descriptor
- * \param[in] channel Channel number
- * \param[in] gain    A gain to set
- *
- * \return Status of the ADC gain setting.
- */
-int32_t adc_sync_set_channel_gain(struct adc_sync_descriptor *const descr, const uint8_t channel,
-                                  const adc_gain_t gain);
-
-/**
- * \brief Set ADC window mode
- *
- * This function sets ADC window mode.
- *
- * \param[in] descr The pointer to the ADC descriptor
- * \param[in] mode  A window mode to set
- *
- * \return Status of the ADC window mode setting.
- */
-int32_t adc_sync_set_window_mode(struct adc_sync_descriptor *const descr, const adc_window_mode_t mode);
-
-/**
- * \brief Set ADC thresholds
- *
- * This function sets ADC positive and negative thresholds.
- *
- * \param[in] descr         The pointer to the ADC descriptor
- * \param[in] low_threshold A lower thresholds to set
- * \param[in] up_threshold  An upper thresholds to set
- *
- * \return Status of the ADC thresholds setting.
- */
-int32_t adc_sync_set_thresholds(struct adc_sync_descriptor *const descr, const adc_threshold_t low_threshold,
-                                const adc_threshold_t up_threshold);
-
-/**
- * \brief Retrieve threshold state
- *
- * This function retrieves ADC threshold state.
- *
- * \param[in] descr  The pointer to the ADC descriptor
- * \param[out] state The threshold state
- *
- * \return The state of ADC thresholds state retrieving.
- */
-int32_t adc_sync_get_threshold_state(const struct adc_sync_descriptor *const descr,
-                                     adc_threshold_status_t *const           state);
-
-/**
- * \brief Check if conversion is complete
- *
- * This function checks if the ADC has finished the conversion.
- *
- * \param[in] descr   The pointer to the ADC descriptor
- * \param[in] channel Channel number
- *
- * \return The status of ADC conversion completion checking.
- * \retval 1 The conversion is complete
- * \retval 0 The conversion is not complete
- */
-int32_t adc_sync_is_channel_conversion_complete(const struct adc_sync_descriptor *const descr, const uint8_t channel);
-
-/**
- * \brief Retrieve the current driver version
- *
- * \return Current driver version.
- */
-uint32_t adc_sync_get_version(void);
-/**@}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#include <hpl_missing_features.h>
-
-#endif /* _HAL_ADC_SYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_atomic.h b/atmel-samd/asf4/samd21/hal/include/hal_atomic.h
deleted file mode 100644
index 8a51b2a96..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_atomic.h
+++ /dev/null
@@ -1,137 +0,0 @@
-/**
- * \file
- *
- * \brief Critical sections related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_ATOMIC_H_INCLUDED
-#define _HAL_ATOMIC_H_INCLUDED
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_helper_atomic
- *
- *@{
- */
-
-/**
- * \brief Type for the register holding global interrupt enable flag
- */
-typedef uint32_t hal_atomic_t;
-
-/**
- * \brief Helper macro for entering critical sections
- *
- * This macro is recommended to be used instead of a direct call
- * hal_enterCritical() function to enter critical
- * sections. No semicolon is required after the macro.
- *
- * \section atomic_usage Usage Example
- * \code
- * CRITICAL_SECTION_ENTER()
- * Critical code
- * CRITICAL_SECTION_LEAVE()
- * \endcode
- */
-#define CRITICAL_SECTION_ENTER()                                                                                       \
-	{                                                                                                                  \
-		volatile hal_atomic_t __atomic;                                                                                \
-		atomic_enter_critical(&__atomic);
-
-/**
- * \brief Helper macro for leaving critical sections
- *
- * This macro is recommended to be used instead of a direct call
- * hal_leaveCritical() function to leave critical
- * sections. No semicolon is required after the macro.
- *
- * \section atomic_usage Usage Example
- * \code
- * CRITICAL_SECTION_ENTER()
- * Some critical code
- * CRITICAL_SECTION_LEAVE()
- * \endcode
- */
-#define CRITICAL_SECTION_LEAVE()                                                                                       \
-	atomic_leave_critical(&__atomic);                                                                                  \
-	}
-
-/**
- * \brief Disable interrupts, enter critical section
- *
- * Disables global interrupts. Supports nested critical sections,
- * so that global interrupts are only re-enabled
- * upon leaving the outermost nested critical section.
- *
- * \param[out] atomic The pointer to a variable to store the value of global
- * interrupt enable flag
- */
-void atomic_enter_critical(hal_atomic_t volatile *atomic);
-
-/**
- * \brief Exit atomic section
- *
- * Enables global interrupts. Supports nested critical sections,
- * so that global interrupts are only re-enabled
- * upon leaving the outermost nested critical section.
- *
- * \param[in] atomic The pointer to a variable, which stores the latest stored
- * value of the global interrupt enable flag
- */
-void atomic_leave_critical(hal_atomic_t volatile *atomic);
-
-/**
- * \brief Retrieve the current driver version
- *
- * \return Current driver version.
- */
-uint32_t atomic_get_version(void);
-/**@}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HAL_ATOMIC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_dac_sync.h b/atmel-samd/asf4/samd21/hal/include/hal_dac_sync.h
deleted file mode 100644
index 79c68b2cb..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_dac_sync.h
+++ /dev/null
@@ -1,134 +0,0 @@
-/**
- * \file
- *
- * \brief DAC functionality declaration.
- *
- * Copyright (C) 2014-2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef HAL_SYNC_DAC_H_INCLUDED
-#define HAL_SYNC_DAC_H_INCLUDED
-
-#include <hpl_dac_sync.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_dac_sync
- *
- *@{
- */
-
-/**
- * \brief DAC synchronous descriptor.
- *
- * The DAC descriptor forward declaration.
- */
-struct dac_sync_descriptor;
-
-/**
- * \brief DAC synchronous channel descriptor.
- *
- */
-struct dac_sync_channel {
-	/** Pointer to buffer what to be converted */
-	uint16_t *buffer;
-	/** The length of buffer */
-	uint32_t length;
-};
-
-/**
- * \brief DAC synchronous descriptor
- */
-struct dac_sync_descriptor {
-	/** DAC device */
-	struct _dac_sync_device device;
-	/** DAC selected channel */
-	struct dac_sync_channel sel_ch[CHANNEL_NUM];
-};
-
-/** \brief Initialize the DAC HAL instance and hardware.
- *  \param[out] descr A DAC descriptor to initialize
- *  \param[in] hw The pointer to hardware instance
- *  \return Operation status.
- */
-int32_t dac_sync_init(struct dac_sync_descriptor *const descr, void *const hw);
-
-/** \brief Deinitialize the DAC HAL instance and hardware.
- *  \param[in] descr Pointer to the HAL DAC descriptor
- *  \return Operation status.
- */
-int32_t dac_sync_deinit(struct dac_sync_descriptor *const descr);
-
-/** \brief Enable DAC channel.
- *  \param[in] descr Pointer to the HAL DAC descriptor
- *  \param[in] ch  Channel number
- *  \return Operation status.
- */
-int32_t dac_sync_enable_channel(struct dac_sync_descriptor *const descr, const uint8_t ch);
-
-/** \brief Disable DAC channel.
- *  \param[in] descr Pointer to the HAL DAC descriptor
- *  \param[in] ch  Channel number
- *  \return Operation status.
- */
-int32_t dac_sync_disable_channel(struct dac_sync_descriptor *const descr, const uint8_t ch);
-
-/** \brief DAC converts digital data to analog output.
- *  \param[in] descr   Pointer to the HAL DAC descriptor
- *  \param[in] ch the  Channel selected to output
- *  \param[in] buffer  Pointer to digital data or buffer
- *  \param[in] length  The number of elements in the buffer
- *  \return Operation status.
- */
-int32_t dac_sync_write(struct dac_sync_descriptor *const descr, const uint8_t ch, uint16_t *buffer, uint32_t length);
-
-/** \brief Get DAC driver version
- *
- *  \return Current driver version.
- */
-uint32_t dac_sync_get_version(void);
-/**@}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* HAL_DAC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_delay.h b/atmel-samd/asf4/samd21/hal/include/hal_delay.h
deleted file mode 100644
index 48fee826f..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_delay.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/**
- * \file
- *
- * \brief HAL delay related functionality declaration.
- *
- * Copyright (C) 2014-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#include <hpl_irq.h>
-#include <hpl_reset.h>
-#include <hpl_sleep.h>
-
-#ifndef _HAL_DELAY_H_INCLUDED
-#define _HAL_DELAY_H_INCLUDED
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_delay Delay Driver
- *
- *@{
- */
-
-/**
- * \brief Initialize Delay driver
- *
- * \param[in] hw The pointer to hardware instance
- */
-void delay_init(void *const hw);
-
-/**
- * \brief Perform delay in us
- *
- * This function performs delay for the given amount of microseconds.
- *
- * \param[in] us The amount delay in us
- */
-void delay_us(const uint16_t us);
-
-/**
- * \brief Perform delay in ms
- *
- * This function performs delay for the given amount of milliseconds.
- *
- * \param[in] ms The amount delay in ms
- */
-void delay_ms(const uint16_t ms);
-
-/**
- * \brief Retrieve the current driver version
- *
- * \return Current driver version.
- */
-uint32_t delay_get_version(void);
-
-/**@}*/
-#ifdef __cplusplus
-}
-#endif
-#endif /* _HAL_DELAY_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_flash.h b/atmel-samd/asf4/samd21/hal/include/hal_flash.h
deleted file mode 100644
index ffba519de..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_flash.h
+++ /dev/null
@@ -1,219 +0,0 @@
-/**
- * \file
- *
- * \brief Flash related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_FLASH_H_INCLUDED
-#define _HAL_FLASH_H_INCLUDED
-
-#include <hpl_flash.h>
-
-/**
- * \addtogroup doc_driver_hal_flash
- *
- * @{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Forward declaration of flash_descriptor. */
-struct flash_descriptor;
-
-/** The callback types */
-enum flash_cb_type {
-	/** Callback type for ready to accept a new command */
-	FLASH_CB_READY,
-	/** Callback type for error */
-	FLASH_CB_ERROR,
-	FLASH_CB_N
-};
-
-/** \brief Prototype of callback on FLASH
- *
- */
-typedef void (*flash_cb_t)(struct flash_descriptor *const descr);
-
-/** \brief FLASH HAL callbacks
- *
- */
-struct flash_callbacks {
-	/** Callback invoked when ready to accept a new command */
-	flash_cb_t cb_ready;
-	/** Callback invoked when error occurs */
-	flash_cb_t cb_error;
-};
-
-/** \brief FLASH HAL driver struct for asynchronous access
- */
-struct flash_descriptor {
-	/** Pointer to FLASH device instance */
-	struct _flash_device dev;
-	/** Callbacks for asynchronous transfer */
-	struct flash_callbacks callbacks;
-};
-
-/** \brief Initialize the FLASH HAL instance and hardware for callback mode
- *
- *  Initialize FLASH HAL with interrupt mode (uses callbacks).
- *
- *  \param[in, out] flash Pointer to the HAL FLASH instance.
- *  \param[in] hw Pointer to the hardware base.
- *  \return Initialize status.
- */
-int32_t flash_init(struct flash_descriptor *flash, void *const hw);
-
-/** \brief Deinitialize the FLASH HAL instance
- *
- *  Abort transfer, disable and reset FLASH, and deinitialize software.
- *
- *  \param[in, out] flash Pointer to the HAL FLASH instance.
- *  \return Deinitialze status.
- */
-int32_t flash_deinit(struct flash_descriptor *flash);
-
-/** \brief Writes a number of bytes to a page in the internal Flash
- *
- *  \param[in, out] flash Pointer to the HAL FLASH instance.
- *  \param[in]  dst_addr  Destination bytes address to write into flash
- *  \param[in]  buffer    Pointer to a buffer where the content
- *                        will be written to the flash
- *  \param[in]  length    Number of bytes to write
- *  \return Write status.
- */
-int32_t flash_write(struct flash_descriptor *flash, uint32_t dst_addr, uint8_t *buffer, uint32_t length);
-
-/** \brief Appends a number of bytes to a page in the internal Flash
- *
- *  This functions never erases the flash before writing.
- *
- *  \param[in, out] flash Pointer to the HAL FLASH instance.
- *  \param[in]  dst_addr  Destination bytes address to write to flash
- *  \param[in]  buffer    Pointer to a buffer with data to write to flash
- *  \param[in]  length    Number of bytes to append
- *  \return Append status.
- */
-int32_t flash_append(struct flash_descriptor *flash, uint32_t dst_addr, const uint8_t *buffer, uint32_t length);
-
-/** \brief Reads a number of bytes to a page in the internal Flash
- *
- *  \param[in, out] flash Pointer to the HAL FLASH instance.
- *  \param[in]  src_addr  Source bytes address to read from flash
- *  \param[out] buffer    Pointer to a buffer where the content
- *                        of the read pages will be stored
- *  \param[in]  length    Number of bytes to read
- *  \return Read status.
- */
-int32_t flash_read(struct flash_descriptor *flash, uint32_t src_addr, uint8_t *buffer, uint32_t length);
-
-/** \brief Register a function as FLASH transfer completion callback
- *
- *  \param[in, out] flash Pointer to the HAL FLASH instance.
- *  \param[in] type Callback type (\ref flash_cb_type).
- *  \param[in] func Pointer to callback function.
- *  \retval 0 Success
- *  \retval -1 Error
- */
-int32_t flash_register_callback(struct flash_descriptor *flash, const enum flash_cb_type type, flash_cb_t func);
-
-/** \brief Execute lock in the internal flash
- *
- *  \param[in, out] flash Pointer to the HAL FLASH instance.
- *  \param[in]  dst_addr  Destination bytes address aligned with page
- *                        start to be locked
- *  \param[in]  page_nums Number of pages to be locked
- *
- *  \return Real locked numbers of pages.
- */
-int32_t flash_lock(struct flash_descriptor *flash, const uint32_t dst_addr, const uint32_t page_nums);
-
-/** \brief Execute unlock in the internal flash
- *
- *  \param[in, out] flash Pointer to the HAL FLASH instance.
- *  \param[in]  dst_addr  Destination bytes address aligned with page
- *                        start to be unlocked
- *  \param[in]  page_nums Number of pages to be unlocked
- *
- *  \return Real unlocked numbers of pages.
- */
-int32_t flash_unlock(struct flash_descriptor *flash, const uint32_t dst_addr, const uint32_t page_nums);
-
-/** \brief Execute erase in the internal flash
- *
- *  \param[in, out] flash Pointer to the HAL FLASH instance.
- *  \param[in]  dst_addr  Destination bytes address aligned with page
- *                        start to be erased
- *  \param[in]  page_nums Number of pages to be erased
- *  \retval 0 Success
- *  \retval -1 Error
- */
-int32_t flash_erase(struct flash_descriptor *flash, const uint32_t dst_addr, const uint32_t page_nums);
-
-/**
- * \brief Get the flash page size
- *
- * \param[in, out] flash Pointer to the HAL FLASH instance
- *
- * \return The flash page size
- */
-uint32_t flash_get_page_size(struct flash_descriptor *flash);
-
-/**
- * \brief Get the number of flash page
- *
- * \param[in, out] flash Pointer to the HAL FLASH instance.
- *
- * \return The flash total page numbers
- */
-uint32_t flash_get_total_pages(struct flash_descriptor *flash);
-
-/** \brief Retrieve the current driver version
- *
- *  \return Current driver version.
- */
-uint32_t flash_get_version(void);
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* ifndef _HAL_FLASH_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_gpio.h b/atmel-samd/asf4/samd21/hal/include/hal_gpio.h
deleted file mode 100644
index f0e8af8d7..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_gpio.h
+++ /dev/null
@@ -1,212 +0,0 @@
-/**
- * \file
- *
- * \brief Port
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- */
-#ifndef _HAL_GPIO_INCLUDED_
-#define _HAL_GPIO_INCLUDED_
-
-#include <hpl_gpio.h>
-#include <utils_assert.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief Set gpio pull mode
- *
- * Set pin pull mode, non existing pull modes throws an fatal assert
- *
- * \param[in] pin       The pin number for device
- * \param[in] pull_mode GPIO_PULL_DOWN = Pull pin high with internal
- *                      resistor
- *                      GPIO_PULL_UP   = Pull pin low with internal resistor
- *                      GPIO_PULL_OFF  = Disable pin pull mode
- */
-static inline void gpio_set_pin_pull_mode(const uint8_t pin, const enum gpio_pull_mode pull_mode)
-{
-	_gpio_set_pin_pull_mode((enum gpio_port)GPIO_PORT(pin), pin & 0x1F, pull_mode);
-}
-
-/**
- * \brief Set pin function
- *
- * Select which function a pin will be used for
- *
- * \param[in] pin       The pin number for device
- * \param[in] function  The pin function is given by a 32-bit wide bitfield
- *                      found in the header files for the device
- *
- */
-static inline void gpio_set_pin_function(const uint32_t pin, uint32_t function)
-{
-	_gpio_set_pin_function(pin, function);
-}
-
-/**
- * \brief Set port data direction
- *
- * Select if the pin data direction is input, output or disabled.
- * If disabled state is not possible, this function throws an assert.
- *
- * \param[in] port      Ports are grouped into groups of maximum 32 pins,
- *                      GPIO_PORTA = group 0, GPIO_PORTB = group 1, etc
- * \param[in] mask      Bit mask where 1 means apply direction setting to the
- *                      corresponding pin
- * \param[in] direction GPIO_DIRECTION_IN  = Data direction in
- *                      GPIO_DIRECTION_OUT = Data direction out
- *                      GPIO_DIRECTION_OFF = Disables the pin
- *                      (low power state)
- */
-static inline void gpio_set_port_direction(const enum gpio_port port, const uint32_t mask,
-                                           const enum gpio_direction direction)
-{
-	_gpio_set_direction(port, mask, direction);
-}
-
-/**
- * \brief Set gpio data direction
- *
- * Select if the pin data direction is input, output or disabled.
- * If disabled state is not possible, this function throws an assert.
- *
- * \param[in] pin       The pin number for device
- * \param[in] direction GPIO_DIRECTION_IN  = Data direction in
- *                      GPIO_DIRECTION_OUT = Data direction out
- *                      GPIO_DIRECTION_OFF = Disables the pin
- *                      (low power state)
- */
-static inline void gpio_set_pin_direction(const uint8_t pin, const enum gpio_direction direction)
-{
-	_gpio_set_direction((enum gpio_port)GPIO_PORT(pin), 1U << GPIO_PIN(pin), direction);
-}
-
-/**
- * \brief Set port level
- *
- * Sets output level on the pins defined by the bit mask
- *
- * \param[in] port  Ports are grouped into groups of maximum 32 pins,
- *                  GPIO_PORTA = group 0, GPIO_PORTB = group 1, etc
- * \param[in] mask  Bit mask where 1 means apply port level to the corresponding
- *                  pin
- * \param[in] level true  = Pin levels set to "high" state
- *                  false = Pin levels set to "low" state
- */
-static inline void gpio_set_port_level(const enum gpio_port port, const uint32_t mask, const bool level)
-{
-	_gpio_set_level(port, mask, level);
-}
-
-/**
- * \brief Set gpio level
- *
- * Sets output level on a pin
- *
- * \param[in] pin       The pin number for device
- * \param[in] level true  = Pin level set to "high" state
- *                  false = Pin level set to "low" state
- */
-static inline void gpio_set_pin_level(const uint8_t pin, const bool level)
-{
-	_gpio_set_level((enum gpio_port)GPIO_PORT(pin), 1U << GPIO_PIN(pin), level);
-}
-
-/**
- * \brief Toggle out level on pins
- *
- * Toggle the pin levels on pins defined by bit mask
- *
- * \param[in] port  Ports are grouped into groups of maximum 32 pins,
- *                  GPIO_PORTA = group 0, GPIO_PORTB = group 1, etc
- * \param[in] mask  Bit mask where 1 means toggle pin level to the corresponding
- *                  pin
- */
-static inline void gpio_toggle_port_level(const enum gpio_port port, const uint32_t mask)
-{
-	_gpio_toggle_level(port, mask);
-}
-
-/**
- * \brief Toggle output level on pin
- *
- * Toggle the pin levels on pins defined by bit mask
- *
- * \param[in] pin       The pin number for device
- */
-static inline void gpio_toggle_pin_level(const uint8_t pin)
-{
-	_gpio_toggle_level((enum gpio_port)GPIO_PORT(pin), 1U << GPIO_PIN(pin));
-}
-
-/**
- * \brief Get input level on pins
- *
- * Read the input level on pins connected to a port
- *
- * \param[in] port  Ports are grouped into groups of maximum 32 pins,
- *                  GPIO_PORTA = group 0, GPIO_PORTB = group 1, etc
- */
-static inline uint32_t gpio_get_port_level(const enum gpio_port port)
-{
-	return _gpio_get_level(port);
-}
-
-/**
- * \brief Get level on pin
- *
- * Reads the level on pins connected to a port
- *
- * \param[in] pin       The pin number for device
- */
-static inline bool gpio_get_pin_level(const uint8_t pin)
-{
-	return (bool)(_gpio_get_level((enum gpio_port)GPIO_PORT(pin)) & (0x01U << GPIO_PIN(pin)));
-}
-/**
- * \brief Get current driver version
- */
-uint32_t gpio_get_version(void);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_i2c_m_sync.h b/atmel-samd/asf4/samd21/hal/include/hal_i2c_m_sync.h
deleted file mode 100644
index 65741831a..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_i2c_m_sync.h
+++ /dev/null
@@ -1,254 +0,0 @@
-/**
- * \file
- *
- * \brief Sync I2C Hardware Abstraction Layer(HAL) declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_I2C_M_SYNC_H_INCLUDED
-#define _HAL_I2C_M_SYNC_H_INCLUDED
-
-#include <hpl_i2c_m_sync.h>
-#include <hal_io.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_i2c_master_sync
- *
- * @{
- */
-
-#define I2C_M_MAX_RETRY 1
-
-/**
- * \brief I2C descriptor structure, embed i2c_device & i2c_interface
- */
-struct i2c_m_sync_desc {
-	struct _i2c_m_sync_device device;
-	struct io_descriptor      io;
-	uint16_t                  slave_addr;
-};
-
-/**
- * \brief Initialize synchronous I2C interface
- *
- * This function initializes the given I/O descriptor to be used as a
- * synchronous I2C interface descriptor.
- * It checks if the given hardware is not initialized and if the given hardware
- * is permitted to be initialized.
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- * \param[in] hw The pointer to hardware instance
- *
- * \return Initialization status.
- * \retval -1 The passed parameters were invalid or the interface is already initialized
- * \retval 0 The initialization is completed successfully
- */
-int32_t i2c_m_sync_init(struct i2c_m_sync_desc *i2c, void *hw);
-
-/**
- * \brief Deinitialize I2C interface
- *
- * This function deinitializes the given I/O descriptor.
- * It checks if the given hardware is initialized and if the given hardware is permitted to be deinitialized.
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- *
- * \return Uninitialization status.
- * \retval -1 The passed parameters were invalid or the interface is already deinitialized
- * \retval 0 The de-initialization is completed successfully
- */
-int32_t i2c_m_sync_deinit(struct i2c_m_sync_desc *i2c);
-
-/**
- * \brief Set the slave device address
- *
- * This function sets the next transfer target slave I2C device address.
- * It takes no effect to any already started access.
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- * \param[in] addr The slave address to access
- * \param[in] addr_len The slave address length, can be I2C_M_TEN or I2C_M_SEVEN
- *
- * \return Masked slave address. The mask is a maximum 10-bit address, and 10th
- *         bit is set if a 10-bit address is used
- */
-int32_t i2c_m_sync_set_slaveaddr(struct i2c_m_sync_desc *i2c, int16_t addr, int32_t addr_len);
-
-/**
- * \brief Set baudrate
- *
- * This function sets the I2C device to the specified baudrate.
- * It only takes effect when the hardware is disabled.
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- * \param[in] clkrate Unused parameter. Should always be 0
- * \param[in] baudrate The baudrate value set to master
- *
- * \return Whether successfully set the baudrate
- * \retval -1 The passed parameters were invalid or the device is already enabled
- * \retval 0 The baudrate set is completed successfully
- */
-int32_t i2c_m_sync_set_baudrate(struct i2c_m_sync_desc *i2c, uint32_t clkrate, uint32_t baudrate);
-
-/**
- * \brief Sync version of enable hardware
- *
- * This function enables the I2C device, and then waits for this enabling operation to be done
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- *
- * \return Whether successfully enable the device
- * \retval -1 The passed parameters were invalid or the device enable failed
- * \retval 0 The hardware enabling is completed successfully
- */
-int32_t i2c_m_sync_enable(struct i2c_m_sync_desc *i2c);
-
-/**
- * \brief Sync version of disable hardware
- *
- * This function disables the I2C device and then waits for this disabling operation to be done
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- *
- * \return Whether successfully disable the device
- * \retval -1 The passed parameters were invalid or the device disable failed
- * \retval 0 The hardware disabling is completed successfully
- */
-int32_t i2c_m_sync_disable(struct i2c_m_sync_desc *i2c);
-
-/**
- * \brief Sync version of write command to I2C slave
- *
- * This function will write the value to a specified register in the I2C slave device and
- * then wait for this operation to be done.
- *
- * The sequence of this routine is
- * sta->address(write)->ack->reg address->ack->resta->address(write)->ack->reg value->nack->stt
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- * \param[in] reg The internal address/register of the I2C slave device
- * \param[in] buffer The buffer holding data to write to the I2C slave device
- * \param[in] length The length (in bytes) to write to the I2C slave device
- *
- * \return Whether successfully write to the device
- * \retval <0 The passed parameters were invalid or write fail
- * \retval 0 Writing to register is completed successfully
- */
-int32_t i2c_m_sync_cmd_write(struct i2c_m_sync_desc *i2c, uint8_t reg, uint8_t *buffer, uint8_t length);
-
-/**
- * \brief Sync version of read register value from I2C slave
- *
- * This function will read a byte value from a specified register in the I2C slave device and
- * then wait for this operation to be done.
- *
- * The sequence of this routine is
- * sta->address(write)->ack->reg address->ack->resta->address(read)->ack->reg value->nack->stt
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- * \param[in] reg The internal address/register of the I2C slave device
- * \param[in] buffer The buffer to hold the read data from the I2C slave device
- * \param[in] length The length (in bytes) to read from the I2C slave device
- *
- * \return Whether successfully read from the device
- * \retval <0 The passed parameters were invalid or read fail
- * \retval 0 Reading from register is completed successfully
- */
-int32_t i2c_m_sync_cmd_read(struct i2c_m_sync_desc *i2c, uint8_t reg, uint8_t *buffer, uint8_t length);
-
-/**
- * \brief Sync version of transfer message to/from the I2C slave
- *
- * This function will transfer a message between the I2C slave and the master. This function will wait for the operation
- * to be done.
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- * \param[in] msg  An i2c_m_msg struct
- *
- * \return The status of the operation
- * \retval 0 Operation completed successfully
- * \retval <0 Operation failed
- */
-int32_t i2c_m_sync_transfer(struct i2c_m_sync_desc *const i2c, struct _i2c_m_msg *msg);
-
-/**
- * \brief Sync version of send stop condition on the i2c bus
- *
- * This function will create a stop condition on the i2c bus to release the bus
- *
- * \param[in] i2c An I2C descriptor, which is used to communicate through I2C
- *
- * \return The status of the operation
- * \retval 0 Operation completed successfully
- * \retval <0 Operation failed
- */
-int32_t i2c_m_sync_send_stop(struct i2c_m_sync_desc *const i2c);
-
-/**
- * \brief Return I/O descriptor for this I2C instance
- *
- * This function will return a I/O instance for this I2C driver instance
- *
- * \param[in] i2c_m_sync_desc An I2C descriptor, which is used to communicate through I2C
- * \param[in] io_descriptor A pointer to an I/O descriptor pointer type
- *
- * \return Error code
- * \retval 0 No error detected
- * \retval <0 Error code
- */
-int32_t i2c_m_sync_get_io_descriptor(struct i2c_m_sync_desc *const i2c, struct io_descriptor **io);
-
-/**
- * \brief Retrieve the current driver version
- *
- * \return Current driver version.
- */
-uint32_t i2c_m_sync_get_version(void);
-
-/**@}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_init.h b/atmel-samd/asf4/samd21/hal/include/hal_init.h
deleted file mode 100644
index a970943eb..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_init.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/**
- * \file
- *
- * \brief HAL initialization related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_INIT_H_INCLUDED
-#define _HAL_INIT_H_INCLUDED
-
-#include <hpl_init.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_helper_init Init Driver
- *
- *@{
- */
-
-/**
- * \brief Initialize the hardware abstraction layer
- *
- * This function calls the various initialization functions.
- * Currently the following initialization functions are supported:
- *  - System clock initialization
- */
-static inline void init_mcu(void)
-{
-	_init_chip();
-}
-
-/**
- * \brief Retrieve the current driver version
- *
- * \return Current driver version.
- */
-uint32_t init_get_version(void);
-
-/**@}*/
-#ifdef __cplusplus
-}
-#endif
-#endif /* _HAL_INIT_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_io.h b/atmel-samd/asf4/samd21/hal/include/hal_io.h
deleted file mode 100644
index e8005e3db..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_io.h
+++ /dev/null
@@ -1,120 +0,0 @@
-/**
- * \file
- *
- * \brief I/O related functionality declaration.
- *
- * Copyright (C) 2014 - 2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_IO_INCLUDED
-#define _HAL_IO_INCLUDED
-
-/**
- * \addtogroup doc_driver_hal_helper_io I/O Driver
- *
- *@{
- */
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief I/O descriptor
- *
- * The I/O descriptor forward declaration.
- */
-struct io_descriptor;
-
-/**
- * \brief I/O write function pointer type
- */
-typedef int32_t (*io_write_t)(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length);
-
-/**
- * \brief I/O read function pointer type
- */
-typedef int32_t (*io_read_t)(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length);
-
-/**
- * \brief I/O descriptor
- */
-struct io_descriptor {
-	io_write_t write; /*! The write function pointer. */
-	io_read_t  read;  /*! The read function pointer. */
-};
-
-/**
- * \brief I/O write interface
- *
- * This function writes up to \p length of bytes to a given I/O descriptor.
- * It returns the number of bytes actually write.
- *
- * \param[in] descr  An I/O descriptor to write
- * \param[in] buf    The buffer pointer to story the write data
- * \param[in] length The number of bytes to write
- *
- * \return The number of bytes written
- */
-int32_t io_write(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length);
-
-/**
- * \brief I/O read interface
- *
- * This function reads up to \p length bytes from a given I/O descriptor, and
- * stores it in the buffer pointed to by \p buf. It returns the number of bytes
- * actually read.
- *
- * \param[in] descr  An I/O descriptor to read
- * \param[in] buf    The buffer pointer to story the read data
- * \param[in] length The number of bytes to read
- *
- * \return The number of bytes actually read. This number can be less than the
- *         requested length. E.g., in a driver that uses ring buffer for
- *         reception, it may depend on the availability of data in the
- *         ring buffer.
- */
-int32_t io_read(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length);
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HAL_IO_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_pwm.h b/atmel-samd/asf4/samd21/hal/include/hal_pwm.h
deleted file mode 100644
index 29efc4bc4..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_pwm.h
+++ /dev/null
@@ -1,161 +0,0 @@
-/**
- * \file
- *
- * \brief PWM functionality declaration.
- *
- * Copyright (C) 2014-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef HAL_PWM_H_INCLUDED
-#define HAL_PWM_H_INCLUDED
-
-#include <hpl_pwm.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_pwm_async
- *
- *@{
- */
-
-/**
- * \brief PWM descriptor
- *
- * The PWM descriptor forward declaration.
- */
-struct pwm_descriptor;
-
-/**
- * \brief PWM callback type
- */
-typedef void (*pwm_cb_t)(const struct pwm_descriptor *const descr);
-
-/**
- * \brief PWM callback types
- */
-enum pwm_callback_type { PWM_PERIOD_CB, PWM_ERROR_CB };
-
-/**
- * \brief PWM callbacks
- */
-struct pwm_callbacks {
-	pwm_cb_t period;
-	pwm_cb_t error;
-};
-
-/** \brief PWM descriptor
- */
-struct pwm_descriptor {
-	/** PWM device */
-	struct _pwm_device device;
-	/** PWM callback structure */
-	struct pwm_callbacks pwm_cb;
-};
-
-/** \brief Initialize the PWM HAL instance and hardware
- *
- *  \param[in] descr Pointer to the HAL PWM descriptor
- *  \param[in] hw The pointer to hardware instance
- *  \param[in] func The pointer to a set of functions pointers
- *
- *  \return Operation status.
- */
-int32_t pwm_init(struct pwm_descriptor *const descr, void *const hw, struct _pwm_hpl_interface *const func);
-
-/** \brief Deinitialize the PWM HAL instance and hardware
- *
- *  \param[in] descr Pointer to the HAL PWM descriptor
- *
- *  \return Operation status.
- */
-int32_t pwm_deinit(struct pwm_descriptor *const descr);
-
-/** \brief PWM output start
- *
- *  \param[in] descr Pointer to the HAL PWM descriptor
- *
- *  \return Operation status.
- */
-int32_t pwm_enable(struct pwm_descriptor *const descr);
-
-/** \brief PWM output stop
- *
- *  \param[in] descr Pointer to the HAL PWM descriptor
- *
- *  \return Operation status.
- */
-int32_t pwm_disable(struct pwm_descriptor *const descr);
-
-/** \brief Register PWM callback
- *
- *  \param[in] descr Pointer to the HAL PWM descriptor
- *  \param[in] type Callback type
- *  \param[in] cb A callback function, passing NULL de-registers callback
- *
- *  \return Operation status.
- *  \retval 0 Success
- *  \retval -1 Error
- */
-int32_t pwm_register_callback(struct pwm_descriptor *const descr, enum pwm_callback_type type, pwm_cb_t cb);
-
-/** \brief Change PWM parameter
- *
- *  \param[in] descr Pointer to the HAL PWM descriptor
- *  \param[in] period Total period of one PWM cycle
- *  \param[in] duty_cycle Period of PWM first half during one cycle
- *
- *  \return Operation status.
- */
-int32_t pwm_set_parameters(struct pwm_descriptor *const descr, const pwm_period_t period,
-                           const pwm_period_t duty_cycle);
-
-/** \brief Get PWM driver version
- *
- *  \return Current driver version.
- */
-uint32_t pwm_get_version(void);
-/**@}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* HAL_PWM;_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_sleep.h b/atmel-samd/asf4/samd21/hal/include/hal_sleep.h
deleted file mode 100644
index 0a11856b1..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_sleep.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/**
- * \file
- *
- * \brief Sleep related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_SLEEP_H_INCLUDED
-#define _HAL_SLEEP_H_INCLUDED
-
-#include <hpl_sleep.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_helper_sleep
- *
- *@{
- */
-
-/**
- * \brief Set the sleep mode of the device and put the MCU to sleep
- *
- * For an overview of which systems are disabled in sleep for the different
- * sleep modes, see the data sheet.
- *
- * \param[in] mode Sleep mode to use
- *
- * \return The status of a sleep request
- * \retval -1 The requested sleep mode was invalid or not available
- * \retval  0 The operation completed successfully, returned after leaving the
- *            sleep
- */
-int sleep(const uint8_t mode);
-
-/**
- * \brief Retrieve the current driver version
- *
- * \return Current driver version.
- */
-uint32_t sleep_get_version(void);
-/**@}*/
-#ifdef __cplusplus
-}
-#endif
-#endif /* _HAL_SLEEP_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_spi_m_sync.h b/atmel-samd/asf4/samd21/hal/include/hal_spi_m_sync.h
deleted file mode 100644
index 2c630ff09..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_spi_m_sync.h
+++ /dev/null
@@ -1,220 +0,0 @@
-/**
- * \file
- *
- * \brief SPI related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_SPI_M_SYNC_H_INCLUDED
-#define _HAL_SPI_M_SYNC_H_INCLUDED
-
-#include <hal_io.h>
-#include <hpl_spi_m_sync.h>
-
-/**
- * \addtogroup doc_driver_hal_spi_master_sync
- *
- * @{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** \brief SPI HAL driver struct for polling mode
- *
- */
-struct spi_m_sync_descriptor {
-	/** SPI device instance */
-	struct _spi_sync_dev dev;
-	/** I/O read/write */
-	struct io_descriptor io;
-	/** Flags for HAL driver */
-	uint16_t flags;
-};
-
-/** \brief Initialize SPI HAL instance and hardware for polling mode
- *
- *  Initialize SPI HAL with polling mode.
- *
- *  \param[in] spi Pointer to the HAL SPI instance.
- *  \param[in] hw Pointer to the hardware base.
- *
- *  \return Operation status.
- *  \retval ERR_NONE Success.
- *  \retval ERR_INVALID_DATA Error, initialized.
- */
-int32_t spi_m_sync_init(struct spi_m_sync_descriptor *spi, void *const hw);
-
-/** \brief Deinitialize the SPI HAL instance and hardware
- *
- *  Abort transfer, disable and reset SPI, deinit software.
- *
- *  \param[in] spi Pointer to the HAL SPI instance.
- *
- *  \return Operation status.
- *  \retval ERR_NONE Success.
- *  \retval <0 Error code.
- */
-void spi_m_sync_deinit(struct spi_m_sync_descriptor *spi);
-
-/** \brief Enable SPI
- *
- *  \param[in] spi Pointer to the HAL SPI instance.
- *
- *  \return Operation status.
- *  \retval ERR_NONE Success.
- *  \retval <0 Error code.
- */
-void spi_m_sync_enable(struct spi_m_sync_descriptor *spi);
-
-/** \brief Disable SPI
- *
- *  \param[in] spi Pointer to the HAL SPI instance.
- *
- *  \return Operation status.
- *  \retval ERR_NONE Success.
- *  \retval <0 Error code.
- */
-void spi_m_sync_disable(struct spi_m_sync_descriptor *spi);
-
-/** \brief Set SPI baudrate
- *
- *  Works if SPI is initialized as master, it sets the baudrate.
- *
- *  \param[in] spi Pointer to the HAL SPI instance.
- *  \param[in] baud_val The target baudrate value
- *                  (see "baudrate calculation" for calculating the value).
- *
- *  \return Operation status.
- *  \retval ERR_NONE Success.
- *  \retval ERR_BUSY Busy
- *  \retval ERR_INVALID_ARG The baudrate is not supported.
- */
-int32_t spi_m_sync_set_baudrate(struct spi_m_sync_descriptor *spi, const uint32_t baud_val);
-
-/** \brief Set SPI mode
- *
- *  Set the SPI transfer mode (\ref spi_transfer_mode),
- *  which controls the clock polarity and clock phase:
- *  - Mode 0: leading edge is rising edge, data sample on leading edge.
- *  - Mode 1: leading edge is rising edge, data sample on trailing edge.
- *  - Mode 2: leading edge is falling edge, data sample on leading edge.
- *  - Mode 3: leading edge is falling edge, data sample on trailing edge.
- *
- *  \param[in] spi Pointer to the HAL SPI instance.
- *  \param[in] mode The mode (0~3).
- *
- *  \return Operation status.
- *  \retval ERR_NONE Success.
- *  \retval ERR_BUSY Busy
- *  \retval ERR_INVALID_ARG The mode is not supported.
- */
-int32_t spi_m_sync_set_mode(struct spi_m_sync_descriptor *spi, const enum spi_transfer_mode mode);
-
-/** \brief Set SPI transfer character size in number of bits
- *
- *  The character size (\ref spi_char_size) influence the way the data is
- *  sent/received.
- *  For char size <= 8-bit, data is stored byte by byte.
- *  For char size between 9-bit ~ 16-bit, data is stored in 2-byte length.
- *  Note that the default and recommended char size is 8-bit since it's
- *  supported by all system.
- *
- *  \param[in] spi Pointer to the HAL SPI instance.
- *  \param[in] char_size The char size (~16, recommended 8).
- *
- *  \return Operation status.
- *  \retval ERR_NONE Success.
- *  \retval ERR_BUSY Busy
- *  \retval ERR_INVALID_ARG The char size is not supported.
- */
-int32_t spi_m_sync_set_char_size(struct spi_m_sync_descriptor *spi, const enum spi_char_size char_size);
-
-/** \brief Set SPI transfer data order
- *
- *  \param[in] spi Pointer to the HAL SPI instance.
- *  \param[in] dord The data order: send LSB/MSB first.
- *
- *  \return Operation status.
- *  \retval ERR_NONE Success.
- *  \retval ERR_BUSY Busy
- *  \retval ERR_INVALID_ARG The data order is not supported.
- */
-int32_t spi_m_sync_set_data_order(struct spi_m_sync_descriptor *spi, const enum spi_data_order dord);
-
-/** \brief Perform the SPI data transfer (TX and RX) in polling way
- *
- *  Activate CS, do TX and RX and deactivate CS. It blocks.
- *
- *  \param[in, out] spi Pointer to the HAL SPI instance.
- *  \param[in] xfer Pointer to the transfer information (\ref spi_xfer).
- *
- *  \retval size Success.
- *  \retval >=0 Timeout, with number of characters transferred.
- *  \retval ERR_BUSY SPI is busy
- */
-int32_t spi_m_sync_transfer(struct spi_m_sync_descriptor *spi, const struct spi_xfer *xfer);
-
-/**
- * \brief Return the I/O descriptor for this SPI instance
- *
- * This function will return an I/O instance for this SPI driver instance.
- *
- * \param[in] spi An SPI master descriptor, which is used to communicate through
- *                SPI
- * \param[in, out] io A pointer to an I/O descriptor pointer type
- *
- * \retval ERR_NONE
- */
-int32_t spi_m_sync_get_io_descriptor(struct spi_m_sync_descriptor *const spi, struct io_descriptor **io);
-
-/** \brief Retrieve the current driver version
- *
- *  \return Current driver version.
- */
-uint32_t spi_m_sync_get_version(void);
-
-/**@}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* ifndef _HAL_SPI_M_SYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_timer.h b/atmel-samd/asf4/samd21/hal/include/hal_timer.h
deleted file mode 100644
index b5c8f6082..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_timer.h
+++ /dev/null
@@ -1,216 +0,0 @@
-/**
- * \file
- *
- * \brief Timer task functionality declaration.
- *
- * Copyright (C) 2014 - 2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_TIMER_H_INCLUDED
-#define _HAL_TIMER_H_INCLUDED
-
-#include <utils_list.h>
-#include <hpl_timer.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_timer
- *
- * @{
- */
-
-/**
- * \brief Timer mode type
- */
-enum timer_task_mode { TIMER_TASK_ONE_SHOT, TIMER_TASK_REPEAT };
-
-/**
- * \brief Timer task descriptor
- *
- * The timer task descriptor forward declaration.
- */
-struct timer_task;
-
-/**
- * \brief Timer task callback function type
- */
-typedef void (*timer_cb_t)(const struct timer_task *const timer_task);
-
-/**
- * \brief Timer task structure
- */
-struct timer_task {
-	struct list_element elem;       /*! List element. */
-	uint32_t            time_label; /*! Absolute timer start time. */
-
-	uint32_t             interval; /*! Number of timer ticks before calling the task. */
-	timer_cb_t           cb;       /*! Function pointer to the task. */
-	enum timer_task_mode mode;     /*! Task mode: one shot or repeat. */
-};
-
-/**
- * \brief Timer structure
- */
-struct timer_descriptor {
-	struct _timer_device   device;
-	uint32_t               time;
-	struct list_descriptor tasks; /*! Timer tasks list. */
-	volatile uint8_t       flags;
-};
-
-/**
- * \brief Initialize timer
- *
- * This function initializes the given timer.
- * It checks if the given hardware is not initialized and if the given hardware
- * is permitted to be initialized.
- *
- * \param[out] descr A timer descriptor to initialize
- * \param[in] hw The pointer to the hardware instance
- * \param[in] func The pointer to a set of function pointers
- *
- * \return Initialization status.
- */
-int32_t timer_init(struct timer_descriptor *const descr, void *const hw, struct _timer_hpl_interface *const func);
-
-/**
- * \brief Deinitialize timer
- *
- * This function deinitializes the given timer.
- * It checks if the given hardware is initialized and if the given hardware is
- * permitted to be deinitialized.
- *
- * \param[in] descr A timer descriptor to deinitialize
- *
- * \return De-initialization status.
- */
-int32_t timer_deinit(struct timer_descriptor *const descr);
-
-/**
- * \brief Start timer
- *
- * This function starts the given timer.
- * It checks if the given hardware is initialized.
- *
- * \param[in] descr The timer descriptor of a timer to start
- *
- * \return Timer starting status.
- */
-int32_t timer_start(struct timer_descriptor *const descr);
-
-/**
- * \brief Stop timer
- *
- * This function stops the given timer.
- * It checks if the given hardware is initialized.
- *
- * \param[in] descr The timer descriptor of a timer to stop
- *
- * \return Timer stopping status.
- */
-int32_t timer_stop(struct timer_descriptor *const descr);
-
-/**
- * \brief Set amount of clock cycles per timer tick
- *
- * This function sets the amount of clock cycles per timer tick for the given timer.
- * It checks if the given hardware is initialized.
- *
- * \param[in] descr The timer descriptor of a timer to stop
- * \param[in] clock_cycles The amount of clock cycles per tick to set
- *
- * \return Setting clock cycles amount status.
- */
-int32_t timer_set_clock_cycles_per_tick(struct timer_descriptor *const descr, const uint32_t clock_cycles);
-
-/**
- * \brief Retrieve the amount of clock cycles in a tick
- *
- * This function retrieves how many clock cycles there are in a single timer tick.
- * It checks if the given hardware is initialized.
- *
- * \param[in]  descr The timer descriptor of a timer to convert ticks to
- * clock cycles
- * \param[out] cycles The amount of clock cycles
- *
- * \return The status of clock cycles retrieving.
- */
-int32_t timer_get_clock_cycles_in_tick(const struct timer_descriptor *const descr, uint32_t *const cycles);
-
-/**
- * \brief Add timer task
- *
- * This function adds the given timer task to the given timer.
- * It checks if the given hardware is initialized.
- *
- * \param[in] descr The timer descriptor of a timer to add task to
- * \param[in] task A task to add
- *
- * \return Timer's task adding status.
- */
-int32_t timer_add_task(struct timer_descriptor *const descr, struct timer_task *const task);
-
-/**
- * \brief Remove timer task
- *
- * This function removes the given timer task from the given timer.
- * It checks if the given hardware is initialized.
- *
- * \param[in] descr The timer descriptor of a timer to remove task from
- * \param[in] task A task to remove
- *
- * \return Timer's task removing status.
- */
-int32_t timer_remove_task(struct timer_descriptor *const descr, const struct timer_task *const task);
-
-/**
- * \brief Retrieve the current driver version
- *
- * \return Current driver version.
- */
-uint32_t timer_get_version(void);
-/**@}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HAL_TIMER_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_usart_sync.h b/atmel-samd/asf4/samd21/hal/include/hal_usart_sync.h
deleted file mode 100644
index e2aef748d..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_usart_sync.h
+++ /dev/null
@@ -1,257 +0,0 @@
-/**
- * \file
- *
- * \brief USART related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_SYNC_USART_H_INCLUDED
-#define _HAL_SYNC_USART_H_INCLUDED
-
-#include "hal_io.h"
-#include <hpl_usart_sync.h>
-
-/**
- * \addtogroup doc_driver_hal_usart_sync
- *
- * @{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief Synchronous USART descriptor
- */
-struct usart_sync_descriptor {
-	struct io_descriptor      io;
-	struct _usart_sync_device device;
-};
-
-/**
- * \brief Initialize USART interface
- *
- * This function initializes the given I/O descriptor to be used
- * as USART interface descriptor.
- * It checks if the given hardware is not initialized and
- * if the given hardware is permitted to be initialized.
- *
- * \param[out] descr A USART descriptor which is used to communicate via USART
- * \param[in] hw The pointer to hardware instance
- * \param[in] func The pointer to as set of functions pointers
- *
- * \return Initialization status.
- */
-int32_t usart_sync_init(struct usart_sync_descriptor *const descr, void *const hw, void *const func);
-
-/**
- * \brief Deinitialize USART interface
- *
- * This function deinitializes the given I/O descriptor.
- * It checks if the given hardware is initialized and
- * if the given hardware is permitted to be deinitialized.
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- *
- * \return De-initialization status.
- */
-int32_t usart_sync_deinit(struct usart_sync_descriptor *const descr);
-
-/**
- * \brief Enable USART interface
- *
- * Enables the USART interface
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- *
- * \return Enabling status.
- */
-int32_t usart_sync_enable(struct usart_sync_descriptor *const descr);
-
-/**
- * \brief Disable USART interface
- *
- * Disables the USART interface
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- *
- * \return Disabling status.
- */
-int32_t usart_sync_disable(struct usart_sync_descriptor *const descr);
-
-/**
- * \brief Retrieve I/O descriptor
- *
- * This function retrieves the I/O descriptor of the given USART descriptor.
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- * \param[out] io An I/O descriptor to retrieve
- *
- * \return The status of the I/O descriptor retrieving.
- */
-int32_t usart_sync_get_io_descriptor(struct usart_sync_descriptor *const descr, struct io_descriptor **io);
-
-/**
- * \brief Specify action for flow control pins
- *
- * This function sets the action (or state) for the flow control pins
- * if the flow control is enabled.
- * It sets the state of flow control pins only if the automatic support of
- * the flow control is not supported by the hardware.
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- * \param[in] state A state to set the flow control pins
- *
- * \return The status of flow control action setup.
- */
-int32_t usart_sync_set_flow_control(struct usart_sync_descriptor *const  descr,
-                                    const union usart_flow_control_state state);
-
-/**
- * \brief Set USART baud rate
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- * \param[in] baud_rate A baud rate to set
- *
- * \return The status of baud rate setting.
- */
-int32_t usart_sync_set_baud_rate(struct usart_sync_descriptor *const descr, const uint32_t baud_rate);
-
-/**
- * \brief Set USART data order
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- * \param[in] data_order A data order to set
- *
- * \return The status of data order setting.
- */
-int32_t usart_sync_set_data_order(struct usart_sync_descriptor *const descr, const enum usart_data_order data_order);
-
-/**
- * \brief Set USART mode
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- * \param[in] mode A mode to set
- *
- * \return The status of mode setting.
- */
-int32_t usart_sync_set_mode(struct usart_sync_descriptor *const descr, const enum usart_mode mode);
-
-/**
- * \brief Set USART parity
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- * \param[in] parity A parity to set
- *
- * \return The status of parity setting.
- */
-int32_t usart_sync_set_parity(struct usart_sync_descriptor *const descr, const enum usart_parity parity);
-
-/**
- * \brief Set USART stop bits
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- * \param[in] stop_bits Stop bits to set
- *
- * \return The status of stop bits setting.
- */
-int32_t usart_sync_set_stopbits(struct usart_sync_descriptor *const descr, const enum usart_stop_bits stop_bits);
-
-/**
- * \brief Set USART character size
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- * \param[in] size A character size to set
- *
- * \return The status of character size setting.
- */
-int32_t usart_sync_set_character_size(struct usart_sync_descriptor *const descr, const enum usart_character_size size);
-
-/**
- * \brief Retrieve the state of flow control pins
- *
- * This function retrieves the of flow control pins
- * if the flow control is enabled.
- * Function can return USART_FLOW_CONTROL_STATE_UNAVAILABLE in case
- * if the flow control is done by the hardware
- * and the pins state cannot be read out.
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- * \param[out] state The state of flow control pins
- *
- * \return The status of flow control state reading.
- */
-int32_t usart_sync_flow_control_status(const struct usart_sync_descriptor *const descr,
-                                       union usart_flow_control_state *const     state);
-
-/**
- * \brief Check if the USART transmitter is empty
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- *
- * \return The status of USART TX empty checking.
- * \retval 0 The USART transmitter is not empty
- * \retval 1 The USART transmitter is empty
- */
-int32_t usart_sync_is_tx_empty(const struct usart_sync_descriptor *const descr);
-
-/**
- * \brief Check if the USART receiver is not empty
- *
- * \param[in] descr A USART descriptor which is used to communicate via USART
- *
- * \return The status of USART RX empty checking.
- * \retval 1 The USART receiver is not empty
- * \retval 0 The USART receiver is empty
- */
-int32_t usart_sync_is_rx_not_empty(const struct usart_sync_descriptor *const descr);
-
-/**
- * \brief Retrieve the current driver version
- *
- * \return Current driver version.
- */
-uint32_t usart_sync_get_version(void);
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HAL_SYNC_USART_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_usb_device.h b/atmel-samd/asf4/samd21/hal/include/hal_usb_device.h
deleted file mode 100644
index 8b7bd5ec7..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hal_usb_device.h
+++ /dev/null
@@ -1,305 +0,0 @@
-/**
- * \file
- *
- * \brief SAM USB device HAL
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HAL_USB_DEVICE_H_INCLUDED
-#define _HAL_USB_DEVICE_H_INCLUDED
-
-#include <hpl_usb_device.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \addtogroup doc_driver_hal_usb_device
- *
- * @{
- */
-
-/** USB device endpoint status structure. */
-struct usb_d_ep_status {
-	/** Endpoint address, including direction. */
-	uint8_t ep;
-	/** Endpoint transfer status code that triggers the callback.
-	 *  \ref usb_xfer_code. */
-	uint8_t code;
-	/** Endpoint error, if \c code is \ref USB_TRANS_ERROR. */
-	uint8_t error;
-	/** Transfer state, \ref usb_ep_state. */
-	uint8_t state;
-	/** Transfer count. */
-	uint32_t count;
-	/** Transfer size. */
-	uint32_t size;
-};
-
-/** Prototype function for callback that is invoked on USB device SOF. */
-typedef void (*usb_d_sof_cb_t)(void);
-
-/** Prototype function for callback that is invoked on USB device events. */
-typedef void (*usb_d_event_cb_t)(const enum usb_event event, const uint32_t param);
-
-/** USB device callbacks. */
-struct usb_d_callbacks {
-	/** Callback that is invoked on SOF. */
-	usb_d_sof_cb_t sof;
-	/** Callback that is invoked on USB RESET/WAKEUP/RESUME/SUSPEND. */
-	usb_d_event_cb_t event;
-};
-
-/** Callback that is invoked when setup packet is received.
- *  Return \c true if request has been handled, or control endpoint will
- *  stall IN/OUT transactions.
- */
-typedef bool (*usb_d_ep_cb_setup_t)(const uint8_t ep, const uint8_t *req);
-
-/** Callback that is invoked when buffer is done without error, but last packet
- *  is full size packet without ZLP.
- *  Return \c true if more data has been requested.
- */
-typedef bool (*usb_d_ep_cb_more_t)(const uint8_t ep, const uint32_t count);
-
-/** Callback that is invoked when all data is finished, including background
- *  transfer, or error happens.
- *  In control transfer data stage, return value is checked,
- *  return \c false if no error happens.
- */
-typedef bool (*usb_d_ep_cb_xfer_t)(const uint8_t ep, const enum usb_xfer_code code, void *param);
-
-/**
- *  \brief Initialize the USB device driver
- *  \return Operation status.
- *  \retval 0 Success.
- *  \retval <0 Error code.
- */
-int32_t usb_d_init(void);
-
-/**
- *  \brief Deinitialize the USB device driver
- */
-void usb_d_deinit(void);
-
-/**
- *  \brief Register the USB device callback
- *  \param[in] type The callback type to register.
- *  \param[in] func The callback function, NULL to disable callback.
- */
-void usb_d_register_callback(const enum usb_d_cb_type type, const FUNC_PTR func);
-
-/**
- *  \brief Enable the USB device driver
- *  \return Operation status.
- *  \retval 0 Success.
- *  \retval <0 Error code.
- */
-int32_t usb_d_enable(void);
-
-/**
- *  \brief Disable the USB device driver
- */
-void usb_d_disable(void);
-
-/**
- *  \brief Attach the USB device
- */
-void usb_d_attach(void);
-
-/**
- *  \brief Detach the USB device
- */
-void usb_d_detach(void);
-
-/**
- *  \brief Retrieve current USB working speed.
- *  \return USB Speed. See \ref usb_speed.
- */
-enum usb_speed usb_d_get_speed(void);
-
-/**
- *  \brief Retrieve current USB frame number.
- *  \return Frame number.
- */
-uint16_t usb_d_get_frame_num(void);
-
-/**
- *  \brief Retrieve current USB micro frame number.
- *  \return Micro frame number inside a frame (0~7).
- *          0 if not available (not HS).
- */
-uint8_t usb_d_get_uframe_num(void);
-
-/**
- *  \brief Set the USB address that is used.
- *  \param[in] addr The address to set.
- */
-void usb_d_set_address(const uint8_t addr);
-
-/**
- *  \brief Send remote wakeup to host
- *  \return Operation status.
- */
-void usb_d_send_remotewakeup(void);
-
-/**
- *  \brief Initialize the endpoint 0.
- *
- *  Note that endpoint 0 must be initialized as control endpoint.
- *
- *  \param[in] max_pkt_size Max. packet size of EP0.
- *  \return Operation status.
- *  \retval 0 Success.
- *  \retval <0 Error code.
- */
-int32_t usb_d_ep0_init(const uint8_t max_pkt_size);
-
-/**
- *  \brief Initialize the endpoint.
- *
- *  \param[in] ep The endpoint address.
- *  \param[in] attr The endpoint attributes.
- *  \param[in] max_pkt_size Max. packet size of EP0.
- *  \return Operation status.
- *  \retval 0 Success.
- *  \retval <0 Error code.
- */
-int32_t usb_d_ep_init(const uint8_t ep, const uint8_t attr, const uint16_t max_pkt_size);
-
-/**
- *  \brief Disable and deinitialize the endpoint.
- *  \param[in] ep The endpoint address to deinitialize.
- */
-void usb_d_ep_deinit(const uint8_t ep);
-
-/**
- *  \brief Register the USB device endpoint callback on initialized endpoint.
- *
- *  \param[in] ep The endpoint address.
- *  \param[in] type The callback type to register.
- *  \param[in] func The callback function, NULL to disable callback.
- */
-void usb_d_ep_register_callback(const uint8_t ep, const enum usb_d_ep_cb_type type, const FUNC_PTR func);
-
-/**
- *  \brief Enabled the initialized endpoint.
- *
- *  Setup request will be monitored after enabling a control endpoint.
- *
- *  \param[in] ep The endpoint address.
- *  \return Operation status.
- *  \retval 0 Success.
- *  \retval <0 Error code.
- */
-int32_t usb_d_ep_enable(const uint8_t ep);
-
-/**
- *  \brief Disable the initialized endpoint.
- *  \param[in] ep The endpoint address.
- */
-void usb_d_ep_disable(const uint8_t ep);
-
-/**
- *  \brief Get request data pointer to access received setup request packet
- *  \param[in] ep The endpoint address.
- *  \return Pointer to the request data.
- *  \retval NULL The endpoint is not a control endpoint.
- */
-uint8_t *usb_d_ep_get_req(const uint8_t ep);
-
-/**
- *  \brief Endpoint transfer.
- *
- *  For control endpoints, start the transfer according to the direction in the bmRequest
- *  type, and finish with STATUS stage.
- *  For non-control endpoints, the transfer will be unique direction. Defined by
- *  bit 8 of the endpoint address.
- *
- *  \param[in] xfer Pointer to the transfer description.
- *  \return Operation status.
- *  \retval 0 Success.
- *  \retval <0 Error code.
- */
-int32_t usb_d_ep_transfer(const struct usb_d_transfer *xfer);
-
-/**
- *  \brief Abort an on-going transfer on a specific endpoint.
- *
- *  \param[in] ep The endpoint address.
- */
-void usb_d_ep_abort(const uint8_t ep);
-
-/**
- *  \brief Retrieve the endpoint status.
- *
- *  \param[in] ep The endpoint address.
- *  \param[out] stat Pointer to the buffer to fill the status description.
- *
- *  \return Endpoint status.
- *  \retval 1 Busy.
- *  \retval 0 Idle.
- *  \retval <0 Error code.
- */
-int32_t usb_d_ep_get_status(const uint8_t ep, struct usb_d_ep_status *stat);
-
-/**
- *  \brief Endpoint halt control.
- *
- *  \param[in] ep The endpoint address.
- *  \param[in] ctrl Control code (SET/CLEAR/GET).
- *
- *  \return Operation status or HALT state (if \c ctrl is \ref USB_EP_HALT_GET).
- */
-int32_t usb_d_ep_halt(const uint8_t ep, const enum usb_ep_halt_ctrl ctrl);
-
-/** \brief Retrieve the current driver version
- *
- *  \return Current driver version.
- */
-uint32_t usb_d_get_version(void);
-
-/**@}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HAL_USB_DEVICE_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_adc_async.h b/atmel-samd/asf4/samd21/hal/include/hpl_adc_async.h
deleted file mode 100644
index 31612be00..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_adc_async.h
+++ /dev/null
@@ -1,274 +0,0 @@
-/**
- * \file
- *
- * \brief ADC related functionality declaration.
- *
- * Copyright (C) 2015-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_ADC_ASYNC_H_INCLUDED
-#define _HPL_ADC_ASYNC_H_INCLUDED
-
-/**
- * \addtogroup HPL ADC
- *
- * \section hpl_async_adc_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include "hpl_adc_sync.h"
-#include "hpl_irq.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief ADC device structure
- *
- * The ADC device structure forward declaration.
- */
-struct _adc_async_device;
-
-/**
- * \brief ADC callback types
- */
-enum _adc_async_callback_type { ADC_ASYNC_DEVICE_CONVERT_CB, ADC_ASYNC_DEVICE_MONITOR_CB, ADC_ASYNC_DEVICE_ERROR_CB };
-
-/**
- * \brief ADC interrupt callbacks
- */
-struct _adc_async_callbacks {
-	void (*window_cb)(struct _adc_async_device *device, const uint8_t channel);
-	void (*error_cb)(struct _adc_async_device *device, const uint8_t channel);
-};
-
-/**
- * \brief ADC channel interrupt callbacks
- */
-struct _adc_async_ch_callbacks {
-	void (*convert_done)(struct _adc_async_device *device, const uint8_t channel, const uint16_t data);
-};
-
-/**
- * \brief ADC descriptor device structure
- */
-struct _adc_async_device {
-	struct _adc_async_callbacks    adc_async_cb;
-	struct _adc_async_ch_callbacks adc_async_ch_cb;
-	struct _irq_descriptor         irq;
-	void *                         hw;
-};
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Initialize synchronous ADC
- *
- * This function does low level ADC configuration.
- *
- * param[in] device The pointer to ADC device instance
- * param[in] hw     The pointer to hardware instance
- *
- * \return Initialization status
- */
-int32_t _adc_async_init(struct _adc_async_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize ADC
- *
- * \param[in] device The pointer to ADC device instance
- */
-void _adc_async_deinit(struct _adc_async_device *const device);
-
-/**
- * \brief Enable ADC peripheral
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- */
-void _adc_async_enable_channel(struct _adc_async_device *const device, const uint8_t channel);
-
-/**
- * \brief Disable ADC peripheral
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- */
-void _adc_async_disable_channel(struct _adc_async_device *const device, const uint8_t channel);
-
-/**
- * \brief Retrieve ADC conversion data size
- *
- * \param[in] device The pointer to ADC device instance
- *
- * \return The data size in bytes
- */
-uint8_t _adc_async_get_data_size(const struct _adc_async_device *const device);
-
-/**
- * \brief Check if conversion is done
- *
- * \param[in] device  The pointer to ADC device instance
- * \param[in] channel Channel number
- *
- * \return The status of conversion
- * \retval true The conversion is done
- * \retval false The conversion is not done
- */
-bool _adc_async_is_channel_conversion_done(const struct _adc_async_device *const device, const uint8_t channel);
-
-/**
- * \brief Make conversion
- *
- * \param[in] device The pointer to ADC device instance
- */
-void _adc_async_convert(struct _adc_async_device *const device);
-
-/**
- * \brief Retrieve the conversion result
- *
- * \param[in] device  The pointer to ADC device instance
- * \param[in] channel Channel number
- *
- * The result value
- */
-uint16_t _adc_async_read_channel_data(const struct _adc_async_device *const device, const uint8_t channel);
-
-/**
- * \brief Set reference source
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] reference A reference source to set
- */
-void _adc_async_set_reference_source(struct _adc_async_device *const device, const adc_reference_t reference);
-
-/**
- * \brief Set resolution
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] resolution A resolution to set
- */
-void _adc_async_set_resolution(struct _adc_async_device *const device, const adc_resolution_t resolution);
-
-/**
- * \brief Set ADC input source of a channel
- *
- * \param[in] device    The pointer to ADC device instance
- * \param[in] pos_input A positive input source to set
- * \param[in] neg_input A negative input source to set
- * \param[in] channel   Channel number
- */
-void _adc_async_set_inputs(struct _adc_async_device *const device, const adc_pos_input_t pos_input,
-                           const adc_neg_input_t neg_input, const uint8_t channel);
-
-/**
- * \brief Set conversion mode
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] mode A conversion mode to set
- */
-void _adc_async_set_conversion_mode(struct _adc_async_device *const device, const enum adc_conversion_mode mode);
-
-/**
- * \brief Set differential mode
- *
- * \param[in] device  The pointer to ADC device instance
- * \param[in] channel Channel number
- * \param[in] mode    A differential mode to set
- */
-void _adc_async_set_channel_differential_mode(struct _adc_async_device *const device, const uint8_t channel,
-                                              const enum adc_differential_mode mode);
-
-/**
- * \brief Set gain
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- * \param[in] gain     A gain to set
- */
-void _adc_async_set_channel_gain(struct _adc_async_device *const device, const uint8_t channel, const adc_gain_t gain);
-
-/**
- * \brief Set window mode
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] mode   A mode to set
- */
-void _adc_async_set_window_mode(struct _adc_async_device *const device, const adc_window_mode_t mode);
-
-/**
- * \brief Set lower threshold
- *
- * \param[in] device        The pointer to ADC device instance
- * \param[in] low_threshold  A lower threshold to set
- * \param[in] up_threshold   An upper thresholds to set
- */
-void _adc_async_set_thresholds(struct _adc_async_device *const device, const adc_threshold_t low_threshold,
-                               const adc_threshold_t up_threshold);
-
-/**
- * \brief Retrieve threshold state
- *
- * \param[in] device The pointer to ADC device instance
- * \param[out] state The threshold state
- */
-void _adc_async_get_threshold_state(const struct _adc_async_device *const device, adc_threshold_status_t *const state);
-
-/**
- * \brief Enable/disable ADC channel interrupt
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- * \param[in] type     The type of interrupt to disable/enable if applicable
- * \param[in] state    Enable or disable
- */
-void _adc_async_set_irq_state(struct _adc_async_device *const device, const uint8_t channel,
-                              const enum _adc_async_callback_type type, const bool state);
-
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_ADC_ASYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_adc_dma.h b/atmel-samd/asf4/samd21/hal/include/hpl_adc_dma.h
deleted file mode 100644
index 40ff158d2..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_adc_dma.h
+++ /dev/null
@@ -1,253 +0,0 @@
-/**
- * \file
- *
- * \brief ADC related functionality declaration.
- *
- * Copyright (C) 2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_ADC_DMA_H_INCLUDED
-#define _HPL_ADC_DMA_H_INCLUDED
-
-/**
- * \addtogroup HPL ADC
- *
- * \section hpl_dma_adc_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <hpl_adc_sync.h>
-#include <hpl_irq.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief ADC device structure
- *
- * The ADC device structure forward declaration.
- */
-struct _adc_dma_device;
-
-/**
- * \brief ADC callback types
- */
-enum _adc_dma_callback_type { ADC_DMA_DEVICE_COMPLETE_CB, ADC_DMA_DEVICE_ERROR_CB };
-
-/**
- * \brief ADC interrupt callbacks
- */
-struct _adc_dma_callbacks {
-	void (*complete)(struct _adc_dma_device *device, const uint16_t data);
-	void (*error)(struct _adc_dma_device *device);
-};
-
-/**
- * \brief ADC descriptor device structure
- */
-struct _adc_dma_device {
-	struct _adc_dma_callbacks adc_dma_cb;
-	struct _irq_descriptor    irq;
-	void *                    hw;
-};
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Initialize synchronous ADC
- *
- * This function does low level ADC configuration.
- *
- * param[in] device The pointer to ADC device instance
- * param[in] hw The pointer to hardware instance
- *
- * \return Initialization status
- */
-int32_t _adc_dma_init(struct _adc_dma_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize ADC
- *
- * \param[in] device The pointer to ADC device instance
- */
-void _adc_dma_deinit(struct _adc_dma_device *const device);
-
-/**
- * \brief Enable ADC peripheral
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- */
-void _adc_dma_enable_channel(struct _adc_dma_device *const device, const uint8_t channel);
-
-/**
- * \brief Disable ADC peripheral
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- */
-void _adc_dma_disable_channel(struct _adc_dma_device *const device, const uint8_t channel);
-
-/**
- * \brief Return address of ADC DMA source
- *
- * \param[in] device The pointer to ADC device instance
- *
- * \return ADC DMA source address
- */
-uint32_t _adc_get_source_for_dma(struct _adc_dma_device *const device);
-
-/**
- * \brief Retrieve ADC conversion data size
- *
- * \param[in] device The pointer to ADC device instance
- *
- * \return The data size in bytes
- */
-uint8_t _adc_dma_get_data_size(const struct _adc_dma_device *const device);
-
-/**
- * \brief Check if conversion is done
- *
- * \param[in] device   The pointer to ADC device instance
- *
- * \return The status of conversion
- * \retval true The conversion is done
- * \retval false The conversion is not done
- */
-bool _adc_dma_is_conversion_done(const struct _adc_dma_device *const device);
-
-/**
- * \brief Make conversion
- *
- * \param[in] device The pointer to ADC device instance
- */
-void _adc_dma_convert(struct _adc_dma_device *const device);
-
-/**
- * \brief Set reference source
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] reference A reference source to set
- */
-void _adc_dma_set_reference_source(struct _adc_dma_device *const device, const adc_reference_t reference);
-
-/**
- * \brief Set resolution
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] resolution A resolution to set
- */
-void _adc_dma_set_resolution(struct _adc_dma_device *const device, const adc_resolution_t resolution);
-
-/**
- * \brief Set ADC input source of a channel
- *
- * \param[in] device    The pointer to ADC device instance
- * \param[in] pos_input A positive input source to set
- * \param[in] neg_input A negative input source to set
- * \param[in] channel   Channel number
- */
-void _adc_dma_set_inputs(struct _adc_dma_device *const device, const adc_pos_input_t pos_input,
-                         const adc_neg_input_t neg_input, const uint8_t channel);
-
-/**
- * \brief Set conversion mode
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] mode A conversion mode to set
- */
-void _adc_dma_set_conversion_mode(struct _adc_dma_device *const device, const enum adc_conversion_mode mode);
-
-/**
- * \brief Set differential mode
- *
- * \param[in] device  The pointer to ADC device instance
- * \param[in] channel Channel number
- * \param[in] mode    A differential mode to set
- */
-void _adc_dma_set_channel_differential_mode(struct _adc_dma_device *const device, const uint8_t channel,
-                                            const enum adc_differential_mode mode);
-
-/**
- * \brief Set gain
- *
- * \param[in] device  The pointer to ADC device instance
- * \param[in] channel Channel number
- * \param[in] gain    A gain to set
- */
-void _adc_dma_set_channel_gain(struct _adc_dma_device *const device, const uint8_t channel, const adc_gain_t gain);
-
-/**
- * \brief Set window mode
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] mode A mode to set
- */
-void _adc_dma_set_window_mode(struct _adc_dma_device *const device, const adc_window_mode_t mode);
-
-/**
- * \brief Set thresholds
- *
- * \param[in] device        The pointer to ADC device instance
- * \param[in] low_threshold A lower thresholds to set
- * \param[in] up_threshold  An upper thresholds to set
- */
-void _adc_dma_set_thresholds(struct _adc_dma_device *const device, const adc_threshold_t low_threshold,
-                             const adc_threshold_t up_threshold);
-
-/**
- * \brief Retrieve threshold state
- *
- * \param[in] device The pointer to ADC device instance
- * \param[out] state The threshold state
- */
-void _adc_dma_get_threshold_state(const struct _adc_dma_device *const device, adc_threshold_status_t *const state);
-
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_ADC_DMA_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_adc_sync.h b/atmel-samd/asf4/samd21/hal/include/hpl_adc_sync.h
deleted file mode 100644
index 84ab01ab3..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_adc_sync.h
+++ /dev/null
@@ -1,281 +0,0 @@
-/**
- * \file
- *
- * \brief ADC related functionality declaration.
- *
- * Copyright (C) 2014-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_ADC_SYNC_H_INCLUDED
-#define _HPL_ADC_SYNC_H_INCLUDED
-
-/**
- * \addtogroup HPL ADC
- *
- * \section hpl_adc_sync_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include "compiler.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief ADC reference source
- */
-typedef uint8_t adc_reference_t;
-
-/**
- * \brief ADC resolution
- */
-typedef uint8_t adc_resolution_t;
-
-/**
- * \brief ADC positive input for channel
- */
-typedef uint8_t adc_pos_input_t;
-
-/**
- * \brief ADC negative input for channel
- */
-typedef uint8_t adc_neg_input_t;
-
-/**
- * \brief ADC threshold
- */
-typedef uint16_t adc_threshold_t;
-
-/**
- * \brief ADC gain
- */
-typedef uint8_t adc_gain_t;
-
-/**
- * \brief ADC conversion mode
- */
-enum adc_conversion_mode { ADC_CONVERSION_MODE_SINGLE_CONVERSION = 0, ADC_CONVERSION_MODE_FREERUN };
-
-/**
- * \brief ADC differential mode
- */
-enum adc_differential_mode { ADC_DIFFERENTIAL_MODE_SINGLE_ENDED = 0, ADC_DIFFERENTIAL_MODE_DIFFERENTIAL };
-
-/**
- * \brief ADC window mode
- */
-typedef uint8_t adc_window_mode_t;
-
-/**
- * \brief ADC threshold status
- */
-typedef bool adc_threshold_status_t;
-
-/**
- * \brief ADC sync descriptor device structure
- */
-struct _adc_sync_device {
-	void *hw;
-};
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Initialize synchronous ADC
- *
- * This function does low level ADC configuration.
- *
- * param[in] device The pointer to ADC device instance
- * param[in] hw     The pointer to hardware instance
- *
- * \return Initialization status
- */
-int32_t _adc_sync_init(struct _adc_sync_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize ADC
- *
- * \param[in] device The pointer to ADC device instance
- */
-void _adc_sync_deinit(struct _adc_sync_device *const device);
-
-/**
- * \brief Enable ADC
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- */
-void _adc_sync_enable_channel(struct _adc_sync_device *const device, const uint8_t channel);
-
-/**
- * \brief Disable ADC
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- */
-void _adc_sync_disable_channel(struct _adc_sync_device *const device, const uint8_t channel);
-
-/**
- * \brief Retrieve ADC conversion data size
- *
- * \param[in] device The pointer to ADC device instance
- *
- * \return The data size in bytes
- */
-uint8_t _adc_sync_get_data_size(const struct _adc_sync_device *const device);
-
-/**
- * \brief Check if conversion is done
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- *
- * \return The status of conversion
- * \retval true The conversion is done
- * \retval false The conversion is not done
- */
-bool _adc_sync_is_channel_conversion_done(const struct _adc_sync_device *const device, const uint8_t channel);
-
-/**
- * \brief Make conversion
- *
- * \param[in] device The pointer to ADC device instance
- */
-void _adc_sync_convert(struct _adc_sync_device *const device);
-
-/**
- * \brief Retrieve the conversion result
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- *
- * \return The result value of channel
- */
-uint16_t _adc_sync_read_channel_data(const struct _adc_sync_device *const device, const uint8_t channel);
-
-/**
- * \brief Set reference source
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] reference A reference source to set
- */
-void _adc_sync_set_reference_source(struct _adc_sync_device *const device, const adc_reference_t reference);
-
-/**
- * \brief Set resolution
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] resolution A resolution to set
- */
-void _adc_sync_set_resolution(struct _adc_sync_device *const device, const adc_resolution_t resolution);
-
-/**
- * \brief Set ADC input source of a channel
- *
- * \param[in] device    The pointer to ADC device instance
- * \param[in] pos_input A positive input source to set
- * \param[in] neg_input A negative input source to set
- * \param[in] channel   Channel number
- */
-void _adc_sync_set_inputs(struct _adc_sync_device *const device, const adc_pos_input_t pos_input,
-                          const adc_neg_input_t neg_input, const uint8_t channel);
-
-/**
- * \brief Set conversion mode
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] mode A conversion mode to set
- */
-void _adc_sync_set_conversion_mode(struct _adc_sync_device *const device, const enum adc_conversion_mode mode);
-
-/**
- * \brief Set differential mode
- *
- * \param[in] device  The pointer to ADC device instance
- * \param[in] channel Channel number
- * \param[in] mode    A differential mode to set
- */
-void _adc_sync_set_channel_differential_mode(struct _adc_sync_device *const device, const uint8_t channel,
-                                             const enum adc_differential_mode mode);
-
-/**
- * \brief Set gain
- *
- * \param[in] device   The pointer to ADC device instance
- * \param[in] channel  Channel number
- * \param[in] gain     A gain to set
- */
-void _adc_sync_set_channel_gain(struct _adc_sync_device *const device, const uint8_t channel, const adc_gain_t gain);
-
-/**
- * \brief Set window mode
- *
- * \param[in] device The pointer to ADC device instance
- * \param[in] mode   A mode to set
- */
-void _adc_sync_set_window_mode(struct _adc_sync_device *const device, const adc_window_mode_t mode);
-
-/**
- * \brief Set threshold
- *
- * \param[in] device        The pointer to ADC device instance
- * \param[in] low_threshold  A lower threshold to set
- * \param[in] up_threshold   An upper thresholds to set
- */
-void _adc_sync_set_thresholds(struct _adc_sync_device *const device, const adc_threshold_t low_threshold,
-                              const adc_threshold_t up_threshold);
-
-/**
- * \brief Retrieve threshold state
- *
- * \param[in] device The pointer to ADC device instance
- * \param[out] state The threshold state
- */
-void _adc_sync_get_threshold_state(const struct _adc_sync_device *const device, adc_threshold_status_t *const state);
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_ADC_SYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_calendar.h b/atmel-samd/asf4/samd21/hal/include/hpl_calendar.h
deleted file mode 100644
index 9b9002c25..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_calendar.h
+++ /dev/null
@@ -1,252 +0,0 @@
-/**
- * \file
- *
- * \brief Generic CALENDAR functionality declaration.
- *
- * Copyright (C) 2014-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-#ifndef _HPL_CALENDER_H_INCLUDED
-#define _HPL_CALENDER_H_INCLUDED
-
-#include <compiler.h>
-#include <utils_list.h>
-#include "hpl_irq.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief Calendar structure
- *
- * The Calendar structure forward declaration.
- */
-struct calendar_dev;
-
-/**
- * \brief Available mask options for alarms.
- *
- * Available mask options for alarms.
- */
-enum calendar_alarm_option {
-	/** Alarm disabled. */
-	CALENDAR_ALARM_MATCH_DISABLED = 0,
-	/** Alarm match on second. */
-	CALENDAR_ALARM_MATCH_SEC,
-	/** Alarm match on second and minute. */
-	CALENDAR_ALARM_MATCH_MIN,
-	/** Alarm match on second, minute, and hour. */
-	CALENDAR_ALARM_MATCH_HOUR,
-	/** Alarm match on second, minute, hour, and day. */
-	CALENDAR_ALARM_MATCH_DAY,
-	/** Alarm match on second, minute, hour, day, and month. */
-	CALENDAR_ALARM_MATCH_MONTH,
-	/** Alarm match on second, minute, hour, day, month and year. */
-	CALENDAR_ALARM_MATCH_YEAR
-};
-
-/**
- * \brief Available mode for alarms.
- */
-enum calendar_alarm_mode { ONESHOT = 1, REPEAT };
-/**
- * \brief Prototype of callback on alarm match
- */
-typedef void (*calendar_drv_cb_alarm_t)(struct calendar_dev *const dev);
-
-/**
- * \brief Structure of Calendar instance
- */
-struct calendar_dev {
-	/** Pointer to the hardware base */
-	void *hw;
-	/** Alarm match callback */
-	calendar_drv_cb_alarm_t callback;
-	/** IRQ struct */
-	struct _irq_descriptor irq;
-};
-
-/**
- * \brief Time struct for calendar
- */
-struct calendar_time {
-	/*range from 0 to 59*/
-	uint8_t sec;
-	/*range from 0 to 59*/
-	uint8_t min;
-	/*range from 0 to 23*/
-	uint8_t hour;
-};
-
-/**
- * \brief Time struct for calendar
- */
-struct calendar_date {
-	/*range from 1 to 28/29/30/31*/
-	uint8_t day;
-	/*range from 1 to 12*/
-	uint8_t month;
-	/*absolute year>= 1970(such as 2000)*/
-	uint16_t year;
-};
-
-/** \brief Calendar driver struct
- *
- */
-struct calendar_descriptor {
-	struct calendar_dev    device;
-	struct list_descriptor alarms;
-	/*base date/time = base_year/1/1/0/0/0(year/month/day/hour/min/sec)*/
-	uint32_t base_year;
-	uint8_t  flags;
-};
-
-/** \brief Date&Time struct for calendar
- */
-struct calendar_date_time {
-	struct calendar_time time;
-	struct calendar_date date;
-};
-
-/** \brief struct for alarm time
- */
-struct _calendar_alarm {
-	struct calendar_date_time  datetime;
-	uint32_t                   timestamp;
-	enum calendar_alarm_option option;
-	enum calendar_alarm_mode   mode;
-};
-
-/**
- * \brief Initialize Calendar instance
- *
- * \param[in] dev The pointer to calendar device struct
- *
- * \return ERR_NONE on success, or an error code on failure.
- */
-int32_t _calendar_init(struct calendar_dev *const dev);
-
-/**
- * \brief Deinitialize Calendar instance
- *
- * \param[in] dev The pointer to calendar device struct
- *
- * \return ERR_NONE on success, or an error code on failure.
- */
-int32_t _calendar_deinit(struct calendar_dev *const dev);
-
-/**
- * \brief Enable Calendar instance
- *
- * \param[in] dev The pointer to calendar device struct
- *
- * \return ERR_NONE on success, or an error code on failure.
- */
-int32_t _calendar_enable(struct calendar_dev *const dev);
-
-/**
- * \brief Disable Calendar instance
- *
- * \param[in] dev The pointer to calendar device struct
- *
- * \return ERR_NONE on success, or an error code on failure.
- */
-int32_t _calendar_disable(struct calendar_dev *const dev);
-/**
- * \brief Set time for calendar
- *
- * \param[in] dev The pointer to calendar device struct
- * \param[in] p_calendar_time Pointer to the time configuration
- *
- * \return ERR_NONE on success, or an error code on failure.
- */
-int32_t _calendar_set_time(struct calendar_dev *const dev, struct calendar_time *const p_calendar_time);
-
-/**
- * \brief Set date for calendar
- *
- * \param[in] dev The pointer to calendar device struct
- * \param[in] p_calendar_date Pointer to the date configuration
- *
- * \return ERR_NONE on success, or an error code on failure.
- */
-int32_t _calendar_set_date(struct calendar_dev *const dev, struct calendar_date *const p_calendar_date);
-
-/**
- * \brief Get the time for calendar HAL instance and hardware
- *  Retrieve the time from calendar instance.
- *
- * \param[in] dev The pointer to calendar device struct
- * \param[in] date_time Pointer to value that will be filled with current time
- *
- * \return Return current counter value
- */
-uint32_t _calendar_get_date_time(struct calendar_dev *const dev, struct calendar_date_time *const date_time);
-
-/**
- * \brief Set compare value for calendar
- *
- * \param[in] dev The pointer to calendar device struct
- * \param[in] alarm Pointer to the configuration
- *
- * \return ERR_NONE on success, or an error code on failure.
- */
-int32_t _calendar_set_alarm(struct calendar_dev *const dev, struct _calendar_alarm *const alarm);
-
-/**
- * \brief Register callback for calendar alarm
- *
- * \param[in] dev The pointer to calendar device struct
- * \param[in] callback The pointer to callback function
- *
- * \return ERR_NONE on success, or an error code on failure.
- */
-int32_t _calendar_register_callback(struct calendar_dev *const dev, calendar_drv_cb_alarm_t callback);
-
-/**
- * \brief Set calendar IRQ
- *
- * \param[in] dev The pointer to calendar device struct
- */
-void _calendar_set_irq(struct calendar_dev *const dev);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HPL_RTC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_core.h b/atmel-samd/asf4/samd21/hal/include/hpl_core.h
deleted file mode 100644
index db448a16a..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_core.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/**
- * \file
- *
- * \brief CPU core related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_CORE_H_INCLUDED
-#define _HPL_CORE_H_INCLUDED
-
-/**
- * \addtogroup HPL Core
- *
- * \section hpl_core_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include "hpl_core_port.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_CORE_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_dac_async.h b/atmel-samd/asf4/samd21/hal/include/hpl_dac_async.h
deleted file mode 100644
index dc40a47f8..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_dac_async.h
+++ /dev/null
@@ -1,182 +0,0 @@
-/**
- * \file
- *
- * \brief DAC related functionality declaration.
- *
- * Copyright (C) 2014-2017 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-#ifndef _HPL_DAC_H_INCLUDED
-#define _HPL_DAC_H_INCLUDED
-
-/**
- * \addtogroup hpl__dac__group DAC HPL APIs
- * See interface description here: \ref hpl__dac__doc
- *
- */
-
-/**@{*/
-
-#include <compiler.h>
-#include "hpl_irq.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * DAC hardware Channel Number
- */
-
-#ifndef CHANNEL_NUM
-#define CHANNEL_NUM 1
-#endif
-
-/**
- * \brief DAC callback types
- */
-enum _dac_callback_type { DAC_DEVICE_CONVERSION_DONE_CB, DAC_DEVICE_ERROR_CB };
-
-/**
- * \brief DAC device structure
- *
- * The DAC device structure forward declaration.
- */
-struct _dac_async_device;
-
-/**
- * \brief DAC interrupt handlers structure
- */
-struct _dac_callback {
-	/** Transmit ready(Data Buffer empty) handler */
-	void (*tx_ready_cb)(struct _dac_async_device *device, const uint8_t ch);
-	/** Error handler */
-	void (*tx_error_cb)(struct _dac_async_device *device, const uint8_t ch);
-};
-
-/**
- * \brief DAC descriptor device structure.
- */
-struct _dac_async_device {
-	struct _dac_callback   dac_cb; /*!< Interrupt handers  */
-	struct _irq_descriptor irq;    /*!< Interrupt descriptor */
-	void *                 hw;     /*!< Hardware module instance handler */
-};
-
-/**
- * \brief Initialize asynchronous DAC.
- *
- * This function does low level DAC configuration.
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] hw The pointer to hardware instance
- *
- * \return Initialization status
- */
-int32_t _dac_async_init(struct _dac_async_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize DAC.
- *
- * \param[in] device The pointer to DAC device instance
- */
-void _dac_async_deinit(struct _dac_async_device *const device);
-
-/**
- * \brief Enable DAC Channel.
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] ch  channel number
- */
-void _dac_async_enable_channel(struct _dac_async_device *const device, const uint8_t ch);
-
-/**
- * \brief Disable DAC Channel.
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] ch  channel number
- */
-void _dac_async_disable_channel(struct _dac_async_device *const device, const uint8_t ch);
-
-/**
- * \brief Checks if DAC channel is enabled
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] ch  channel number
- *
- * \return true channel is enabled, false otherwise
- */
-bool _dac_async_is_channel_enable(struct _dac_async_device *const device, const uint8_t ch);
-
-/**
- * \brief Write DAC data for output.
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] data Digital data which to be converted
- * \param[in] ch The channel selected to output
- */
-void _dac_async_write_data(struct _dac_async_device *const device, const uint16_t data, const uint8_t ch);
-
-/**
- * \brief Enable/disable DAC interrupt
- *
- * param[in] device The pointer to DAC device instance
- * param[in] type The type of interrupt to disable/enable if applicable
- * param[in] state Enable or disable
- */
-void _dac_async_set_irq_state(struct _dac_async_device *const device, const enum _dac_callback_type type,
-                              const bool state);
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-
-/**
- * \page hpl__dac__doc DAC HPL Interface Driver
- *
- * \section hpl__dac__desc DAC HPL Description
- *
- * The following device can use this HPL driver
- * - Atmel | SMART SAM D21
- *
- * \section hpl__dac__imple DAC HPL Implements
- * - \subpage hpl__dac__hw_module1__doc
- */
-
-#endif /* _HPL_DAC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_dac_sync.h b/atmel-samd/asf4/samd21/hal/include/hpl_dac_sync.h
deleted file mode 100644
index a70b3ba64..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_dac_sync.h
+++ /dev/null
@@ -1,148 +0,0 @@
-/**
- * \file
- *
- * \brief DAC related functionality declaration.
- *
- * Copyright (C) 2014-2017 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-#ifndef _HPL_DAC_SYNC_H_INCLUDED
-#define _HPL_DAC_SYNC_H_INCLUDED
-
-/**
- * \addtogroup hpl__dac__group DAC HPL APIs
- * See interface description here: \ref hpl__dac__doc
- *
- */
-
-/**@{*/
-
-#include <compiler.h>
-#include "hpl_irq.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * DAC hardware Channel Number
- */
-
-#ifndef CHANNEL_NUM
-#define CHANNEL_NUM 1
-#endif
-
-/**
- * \brief DAC sync descriptor device structure.
- */
-struct _dac_sync_device {
-	void *hw; /*!< Hardware module instance handler */
-};
-
-/**
- * \brief Initialize synchronous DAC.
- *
- * This function does low level DAC configuration.
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] hw The pointer to hardware instance
- *
- * \return Initialization status
- */
-int32_t _dac_sync_init(struct _dac_sync_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize DAC.
- *
- * \param[in] device The pointer to DAC device instance
- */
-void _dac_sync_deinit(struct _dac_sync_device *const device);
-
-/**
- * \brief Enable DAC Channel.
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] ch  channel number
- */
-void _dac_sync_enable_channel(struct _dac_sync_device *const device, const uint8_t ch);
-
-/**
- * \brief Disable DAC Channel.
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] ch  channel number
- */
-void _dac_sync_disable_channel(struct _dac_sync_device *const device, const uint8_t ch);
-
-/**
- * \brief Checks if DAC channel is enabled
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] ch  channel number
- *
- * \return true channel is enabled, false otherwise
- */
-bool _dac_sync_is_channel_enable(struct _dac_sync_device *const device, const uint8_t ch);
-
-/**
- * \brief Write synchronous DAC data for output.
- *
- * \param[in] device The pointer to DAC device instance
- * \param[in] data Digital data which to be converted
- * \param[in] ch The channel selected to output
- */
-void _dac_sync_write_data(struct _dac_sync_device *const device, const uint16_t data, const uint8_t ch);
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-
-/**
- * \page hpl__dac__doc DAC HPL Interface Driver
- *
- * \section hpl__dac__desc DAC HPL Description
- *
- * The following device can use this HPL driver
- * - Atmel | SMART SAM D21
- *
- * \section hpl__dac__imple DAC HPL Implements
- * - \subpage hpl__dac__hw_module1__doc
- */
-
-#endif /* _HPL_DAC_SYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_delay.h b/atmel-samd/asf4/samd21/hal/include/hpl_delay.h
deleted file mode 100644
index 7d2a6f90b..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_delay.h
+++ /dev/null
@@ -1,88 +0,0 @@
-/**
- * \file
- *
- * \brief Delay related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_DELAY_H_INCLUDED
-#define _HPL_DELAY_H_INCLUDED
-
-/**
- * \addtogroup HPL Delay
- *
- * \section hpl_delay_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#ifndef _UNIT_TEST_
-#include <compiler.h>
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \name HPL functions
- */
-//@{
-
-/**
- * \brief Initialize delay functionality
- *
- * \param[in] hw The pointer to hardware instance
- */
-void _delay_init(void *const hw);
-
-/**
- * \brief Retrieve the amount of cycles to delay for the given amount of us
- *
- * \param[in] us The amount of us to delay for
- *
- * \return The amount of cycles
- */
-uint32_t _get_cycles_for_us(const uint16_t us);
-
-/**
- * \brief Retrieve the amount of cycles to delay for the given amount of ms
- *
- * \param[in] ms The amount of ms to delay for
- *
- * \return The amount of cycles
- */
-uint32_t _get_cycles_for_ms(const uint16_t ms);
-
-/**
- * \brief Delay loop to delay n number of cycles
- *
- * \param[in] hw The pointer to hardware instance
- * \param[in] cycles The amount of cycles to delay for
- */
-void _delay_cycles(void *const hw, uint32_t cycles);
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_DELAY_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_dma.h b/atmel-samd/asf4/samd21/hal/include/hpl_dma.h
deleted file mode 100644
index f8c8cce42..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_dma.h
+++ /dev/null
@@ -1,167 +0,0 @@
-/**
- * \file
- *
- * \brief DMA related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_DMA_H_INCLUDED
-#define _HPL_DMA_H_INCLUDED
-
-/**
- * \addtogroup HPL DMA
- *
- * \section hpl_dma_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <compiler.h>
-#include <hpl_irq.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct _dma_resource;
-
-/**
- * \brief DMA callback types
- */
-enum _dma_callback_type { DMA_TRANSFER_COMPLETE_CB, DMA_TRANSFER_ERROR_CB };
-
-/**
- * \brief DMA interrupt callbacks
- */
-struct _dma_callbacks {
-	void (*transfer_done)(struct _dma_resource *resource);
-	void (*error)(struct _dma_resource *resource);
-};
-
-/**
- * \brief DMA resource structure
- */
-struct _dma_resource {
-	struct _dma_callbacks dma_cb;
-	void *                back;
-};
-
-/**
- * \brief Initialize DMA
- *
- * This function does low level DMA configuration.
- *
- * \return initialize status
- */
-int32_t _dma_init(void);
-
-/**
- * \brief Set destination address
- *
- * \param[in] channel DMA channel to set destination address for
- * \param[in] dst Destination address
- *
- * \return setting status
- */
-int32_t _dma_set_destination_address(const uint8_t channel, const void *const dst);
-
-/**
- * \brief Set source address
- *
- * \param[in] channel DMA channel to set source address for
- * \param[in] src Source address
- *
- * \return setting status
- */
-int32_t _dma_set_source_address(const uint8_t channel, const void *const src);
-
-/**
- * \brief Enable/disable source address incrementation during DMA transaction
- *
- * \param[in] channel DMA channel to set source address for
- * \param[in] enable True to enable, false to disable
- *
- * \return status of operation
- */
-int32_t _dma_srcinc_enable(const uint8_t channel, const bool enable);
-
-/**
- * \brief Set the amount of data to be transfered per transaction
- *
- * \param[in] channel DMA channel to set data amount for
- * \param[in] amount Data amount
- *
- * \return status of operation
- */
-int32_t _dma_set_data_amount(const uint8_t channel, const uint32_t amount);
-
-/**
- * \brief Trigger DMA transaction on the given channel
- *
- * \param[in] channel DMA channel to trigger transaction on
- *
- * \return status of operation
- */
-int32_t _dma_enable_transaction(const uint8_t channel, const bool software_trigger);
-
-/**
- * \brief Retrieves DMA resource structure
- *
- * \param[out] resource The resource to be retrieved
- * \param[in] channel DMA channel to retrieve structure for
- *
- * \return status of operation
- */
-int32_t _dma_get_channel_resource(struct _dma_resource **resource, const uint8_t channel);
-
-/**
- * \brief Enable/disable DMA interrupt
- *
- * \param[in] channel DMA channel to enable/disable interrupt for
- * \param[in] type The type of interrupt to disable/enable if applicable
- * \param[in] state Enable or disable
- */
-void _dma_set_irq_state(const uint8_t channel, const enum _dma_callback_type type, const bool state);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* HPL_DMA_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_flash.h b/atmel-samd/asf4/samd21/hal/include/hpl_flash.h
deleted file mode 100644
index 6a59f757c..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_flash.h
+++ /dev/null
@@ -1,228 +0,0 @@
-/**
- * \file
- *
- * \brief FLASH related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-#ifndef _HPL_FLASH_H_INCLUDED
-#define _HPL_FLASH_H_INCLUDED
-
-/**
- * \addtogroup hpl__flash__group FLASH HPL APIs
- *
- */
-
-/**@{*/
-
-#include <compiler.h>
-#include "hpl_irq.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief FLASH device structure
- *
- * The FLASH device structure forward declaration.
- */
-struct _flash_device;
-
-/** The callback types */
-enum _flash_cb_type { FLASH_DEVICE_CB_READY, FLASH_DEVICE_CB_ERROR, FLASH_DEVICE_CB_N };
-
-/**
- * \brief FLASH interrupt handlers structure
- */
-struct _flash_callback {
-	/** Ready to accept new command handler */
-	void (*ready_cb)(struct _flash_device *device);
-	/** Error handler */
-	void (*error_cb)(struct _flash_device *device);
-};
-
-/**
- * \brief FLASH descriptor device structure.
- */
-struct _flash_device {
-	struct _flash_callback flash_cb; /*!< Interrupt handers  */
-	struct _irq_descriptor irq;      /*!< Interrupt descriptor */
-	void *                 hw;       /*!< Hardware module instance handler */
-};
-
-/**
- * \brief Initialize FLASH.
- *
- * This function does low level FLASH configuration.
- *
- * \param[in] device The pointer to FLASH device instance
- * \param[in] hw The pointer to hardware instance
- *
- * \return Initialize status.
- */
-int32_t _flash_init(struct _flash_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize FLASH.
- *
- * \param[in] device The pointer to FLASH device instance
- */
-void _flash_deinit(struct _flash_device *const device);
-
-/**
- * \brief Reads a number of bytes in the internal Flash.
- *
- * \param[in] device         The pointer to FLASH device instance
- * \param[in]  src_addr      Source bytes address to read from flash
- * \param[out] buffer        Pointer to a buffer where the content
- *                           of the read page will be stored
- * \param[in]  length        Number of bytes to read
- */
-void _flash_read(struct _flash_device *const device, const uint32_t src_addr, uint8_t *buffer, uint32_t length);
-
-/**
- * \brief Writes a number of bytes in the internal Flash.
- *
- * \param[in] device         The pointer to FLASH device instance
- * \param[in]  dst_addr      Destination bytes address to write into flash
- * \param[in]  buffer        Pointer to buffer where the data to
- *                           write is stored
- * \param[in]  length        Number of bytes to write
- */
-void _flash_write(struct _flash_device *const device, const uint32_t dst_addr, const uint8_t *buffer, uint32_t length);
-
-/**
- * \brief Appends a number of bytes in the internal Flash.
- *
- * \param[in] device         The pointer to FLASH device instance
- * \param[in]  dst_addr      Destination bytes address to write into flash
- * \param[in]  buffer        Pointer to buffer with data to write to flash
- * \param[in]  length        Number of bytes to write
- */
-void _flash_append(struct _flash_device *const device, const uint32_t dst_addr, const uint8_t *buffer, uint32_t length);
-
-/** \brief Execute lock in the internal flash
- *  \param[in] device         The pointer to FLASH device instance
- *  \param[in]  dst_addr      Destination bytes address aligned with page
- *                            start to be locked
- *  \param[in]  page_nums     Number of pages to be locked
- *
- *  \return Real locked numbers of pages.
- */
-int32_t _flash_lock(struct _flash_device *const device, const uint32_t dst_addr, uint32_t page_nums);
-
-/** \brief Execute unlock in the internal flash
- *  \param[in] device         The pointer to FLASH device instance
- *  \param[in]  dst_addr      Destination bytes address aligned with page
- *                            start to be unlocked
- *  \param[in]  page_nums     Number of pages to be unlocked
- *
- *  \return Real unlocked numbers of pages.
- */
-int32_t _flash_unlock(struct _flash_device *const device, const uint32_t dst_addr, uint32_t page_nums);
-
-/** \brief check whether the region which is pointed by address
- *         is locked
- *  \param[in] device         The pointer to FLASH device instance
- *  \param[in]  dst_addr      Destination bytes address to check
- *
- *  \return The lock status of assigned address.
- */
-bool _flash_is_locked(struct _flash_device *const device, const uint32_t dst_addr);
-
-/** \brief Execute erase in the internal flash
- *  \param[in] device         The pointer to FLASH device instance
- *  \param[in]  dst_addr      Destination bytes address aligned with page
- *                            start to be erased
- *  \param[in]  page_nums     Number of pages to be erased
- */
-void _flash_erase(struct _flash_device *const device, const uint32_t dst_addr, uint32_t page_nums);
-
-/**
- * \brief Get the flash page size.
- *
- * \param[in] device         The pointer to FLASH device instance
- *
- * \return The flash page size
- */
-uint32_t _flash_get_page_size(struct _flash_device *const device);
-
-/**
- * \brief Get the numbers of flash page.
- *
- * \param[in] device         The pointer to FLASH device instance
- *
- * \return The flash total page numbers
- */
-uint32_t _flash_get_total_pages(struct _flash_device *const device);
-
-/**
- * \brief Get the number of wait states for read and write operations.
- *
- * \param[in] device         The pointer to FLASH device instance
- *
- * \return The number of wait states for read and write operations
- */
-uint8_t _flash_get_wait_state(struct _flash_device *const device);
-
-/**
- * \brief Set the number of wait states for read and write operations.
- *
- * \param[in] device         The pointer to FLASH device instance
- * \param[in] state The number of wait states
- *
- */
-void _flash_set_wait_state(struct _flash_device *const device, uint8_t state);
-
-/**
- * \brief Enable/disable Flash interrupt
- *
- * param[in] device The pointer to Flash device instance
- * param[in] type The type of interrupt to disable/enable if applicable
- * param[in] state Enable or disable
- */
-void _flash_set_irq_state(struct _flash_device *const device, const enum _flash_cb_type type, const bool state);
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-
-#endif /* _HPL_FLASH_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_gpio.h b/atmel-samd/asf4/samd21/hal/include/hpl_gpio.h
deleted file mode 100644
index e1de9c58e..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_gpio.h
+++ /dev/null
@@ -1,195 +0,0 @@
-/**
- * \file
- *
- * \brief Port related functionality declaration.
- *
- * Copyright (C) 2014-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_GPIO_H_INCLUDED
-#define _HPL_GPIO_H_INCLUDED
-
-/**
- * \addtogroup HPL Port
- *
- * \section hpl_port_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-/**
- * \brief Macros for the pin and port group, lower 5
- * bits stands for pin number in the group, higher 3
- * bits stands for port group
- */
-#define GPIO_PIN(n) (((n)&0x1Fu) << 0)
-#define GPIO_PORT(n) ((n) >> 5)
-#define GPIO(port, pin) ((((port)&0x7u) << 5) + ((pin)&0x1Fu))
-#define GPIO_PIN_FUNCTION_OFF 0xffffffff
-
-/**
- * \brief PORT pull mode settings
- */
-enum gpio_pull_mode { GPIO_PULL_OFF, GPIO_PULL_UP, GPIO_PULL_DOWN };
-
-/**
- * \brief PORT direction settins
- */
-enum gpio_direction { GPIO_DIRECTION_OFF, GPIO_DIRECTION_IN, GPIO_DIRECTION_OUT };
-
-/**
- * \brief PORT group abstraction
- */
-
-enum gpio_port { GPIO_PORTA, GPIO_PORTB, GPIO_PORTC, GPIO_PORTD, GPIO_PORTE };
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Port initialization function
- *
- * Port initialization function should setup the port module based
- * on a static configuration file, this function should normally
- * not be called directly, but is a part of hal_init()
- */
-void _gpio_init(void);
-
-/**
- * \brief Set direction on port with mask
- *
- * Set data direction for each pin, or disable the pin
- *
- * \param[in] port      Ports are grouped into groups of maximum 32 pins,
- *                      GPIO_PORTA = group 0, GPIO_PORTB = group 1, etc
- * \param[in] mask      Bit mask where 1 means apply direction setting to the
- *                      corresponding pin
- * \param[in] direction GPIO_DIRECTION_OFF  = set pin direction to input
- *                      and disable input buffer to disable the pin
- *                      GPIO_DIRECTION_IN   = set pin direction to input
- *                      and enable input buffer to enable the pin
- *                      GPIO_DIRECTION_OUT  = set pin direction to output
- *                      and disable input buffer
- */
-static inline void _gpio_set_direction(const enum gpio_port port, const uint32_t mask,
-                                       const enum gpio_direction direction);
-
-/**
- * \brief Set output level on port with mask
- *
- * Sets output state on pin to high or low with pin masking
- *
- * \param[in] port  Ports are grouped into groups of maximum 32 pins,
- *                  GPIO_PORTA = group 0, GPIO_PORTB = group 1, etc
- * \param[in] mask  Bit mask where 1 means apply direction setting to
- *                  the corresponding pin
- * \param[in] level true  = pin level is set to 1
- *                  false = pin level is set to 0
- */
-static inline void _gpio_set_level(const enum gpio_port port, const uint32_t mask, const bool level);
-
-/**
- * \brief Change output level to the opposite with mask
- *
- * Change pin output level to the opposite with pin masking
- *
- * \param[in] port  Ports are grouped into groups of maximum 32 pins,
- *                  GPIO_PORTA = group 0, GPIO_PORTB = group 1, etc
- * \param[in] mask  Bit mask where 1 means apply direction setting to
- *                  the corresponding pin
- */
-static inline void _gpio_toggle_level(const enum gpio_port port, const uint32_t mask);
-
-/**
- * \brief Get input levels on all port pins
- *
- * Get input level on all port pins, will read IN register if configured to
- * input and OUT register if configured as output
- *
- * \param[in] port  Ports are grouped into groups of maximum 32 pins,
- *                  GPIO_PORTA = group 0, GPIO_PORTB = group 1, etc
- */
-static inline uint32_t _gpio_get_level(const enum gpio_port port);
-
-/**
- * \brief Set pin pull mode
- *
- * Set pull mode on a single pin
- *
- * \notice This function will automatically change pin direction to input
- *
- * \param[in] port      Ports are grouped into groups of maximum 32 pins,
- *                      GPIO_PORTA = group 0, GPIO_PORTB = group 1, etc
- * \param[in] pin       The pin in the group that pull mode should be selected
- *                      for
- * \param[in] pull_mode GPIO_PULL_OFF  = pull resistor on pin is disabled
- *                      GPIO_PULL_DOWN = pull resistor on pin will pull pin
- *                      level to ground level
- *                      GPIO_PULL_UP   = pull resistor on pin will pull pin
- *                      level to VCC
- */
-static inline void _gpio_set_pin_pull_mode(const enum gpio_port port, const uint8_t pin,
-                                           const enum gpio_pull_mode pull_mode);
-
-/**
- * \brief Set gpio function
- *
- * Select which function a gpio is used for
- *
- * \param[in] gpio     The gpio to set function for
- * \param[in] function The gpio function is given by a 32-bit wide bitfield
- *                     found in the header files for the device
- *
- */
-static inline void _gpio_set_pin_function(const uint32_t gpio, const uint32_t function);
-
-#include <hpl_gpio_base.h>
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_GPIO_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_i2c_m_async.h b/atmel-samd/asf4/samd21/hal/include/hpl_i2c_m_async.h
deleted file mode 100644
index c00d7e733..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_i2c_m_async.h
+++ /dev/null
@@ -1,215 +0,0 @@
-/**
- * \file
- *
- * \brief I2C Master Hardware Proxy Layer(HPL) declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-#ifndef _HPL_I2C_M_ASYNC_H_INCLUDED
-#define _HPL_I2C_M_ASYNC_H_INCLUDED
-
-#include "hpl_i2c_m_sync.h"
-#include "hpl_irq.h"
-#include "utils.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief i2c master callback names
- */
-enum _i2c_m_async_callback_type {
-	I2C_M_ASYNC_DEVICE_ERROR,
-	I2C_M_ASYNC_DEVICE_TX_COMPLETE,
-	I2C_M_ASYNC_DEVICE_RX_COMPLETE
-};
-
-struct _i2c_m_async_device;
-
-typedef void (*_i2c_complete_cb_t)(struct _i2c_m_async_device *i2c_dev);
-typedef void (*_i2c_error_cb_t)(struct _i2c_m_async_device *i2c_dev, int32_t errcode);
-
-/**
- * \brief i2c callback pointers structure
- */
-struct _i2c_m_async_callback {
-	_i2c_error_cb_t    error;
-	_i2c_complete_cb_t tx_complete;
-	_i2c_complete_cb_t rx_complete;
-};
-
-/**
- * \brief i2c device structure
- */
-struct _i2c_m_async_device {
-	struct _i2c_m_service        service;
-	void *                       hw;
-	struct _i2c_m_async_callback cb;
-	struct _irq_descriptor       irq;
-};
-
-/**
- * \name HPL functions
- */
-
-/**
- * \brief Initialize I2C in interrupt mode
- *
- * This function does low level I2C configuration.
- *
- * \param[in] i2c_dev The pointer to i2c interrupt device structure
- * \param[in] hw The pointer to hardware instance
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_async_init(struct _i2c_m_async_device *const i2c_dev, void *const hw);
-
-/**
- * \brief Deinitialize I2C in interrupt mode
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_async_deinit(struct _i2c_m_async_device *const i2c_dev);
-
-/**
- * \brief Enable I2C module
- *
- * This function does low level I2C enable.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_async_enable(struct _i2c_m_async_device *const i2c_dev);
-
-/**
- * \brief Disable I2C module
- *
- * This function does low level I2C disable.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_async_disable(struct _i2c_m_async_device *const i2c_dev);
-
-/**
- * \brief Transfer data by I2C
- *
- * This function does low level I2C data transfer.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- * \param[in] msg The pointer to i2c msg structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_async_transfer(struct _i2c_m_async_device *const i2c_dev, struct _i2c_m_msg *msg);
-
-/**
- * \brief Set baud rate of I2C
- *
- * This function does low level I2C set baud rate.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- * \param[in] clkrate The clock rate(KHz) input to i2c module
- * \param[in] baudrate The demand baud rate(KHz) of i2c module
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_async_set_baudrate(struct _i2c_m_async_device *const i2c_dev, uint32_t clkrate, uint32_t baudrate);
-
-/**
- * \brief Register callback to I2C
- *
- * This function does low level I2C callback register.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- * \param[in] cb_type The callback type request
- * \param[in] func The callback function pointer
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_async_register_callback(struct _i2c_m_async_device *i2c_dev, enum _i2c_m_async_callback_type cb_type,
-                                       FUNC_PTR func);
-
-/**
- * \brief Generate stop condition on the I2C bus
- *
- * This function will generate a stop condition on the I2C bus
- *
- * \param[in] i2c_m_async_descriptor An i2c descriptor which is used to communicate through I2C
- *
- * \return Operation status
- * \retval 0 Operation executed successfully
- * \retval <0 Operation failed
- */
-int32_t _i2c_m_async_send_stop(struct _i2c_m_async_device *const i2c_dev);
-
-/**
- * \brief Returns the number of bytes left or not used in the I2C message buffer
- *
- * This function will return the number of bytes left (not written to the bus) or still free
- * (not received from the bus) in the message buffer, depending on direction of transmission.
- *
- * \param[in] i2c_m_async_descriptor An i2c descriptor which is used to communicate through I2C
- *
- * \return Number of bytes or error code
- * \retval >0 Positive number indicating bytes left
- * \retval 0  Buffer is full/empty depending on direction
- * \retval <0 Error code
- */
-int32_t _i2c_m_async_get_bytes_left(struct _i2c_m_async_device *const i2c_dev);
-
-/**
- * \brief Enable/disable I2C master interrupt
- *
- * param[in] device The pointer to I2C master device instance
- * param[in] type The type of interrupt to disable/enable if applicable
- * param[in] state Enable or disable
- */
-void _i2c_m_async_set_irq_state(struct _i2c_m_async_device *const device, const enum _i2c_m_async_callback_type type,
-                                const bool state);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_i2c_m_sync.h b/atmel-samd/asf4/samd21/hal/include/hpl_i2c_m_sync.h
deleted file mode 100644
index 4a643ee65..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_i2c_m_sync.h
+++ /dev/null
@@ -1,195 +0,0 @@
-/**
- * \file
- *
- * \brief I2C Master Hardware Proxy Layer(HPL) declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-#ifndef _HPL_I2C_M_SYNC_H_INCLUDED
-#define _HPL_I2C_M_SYNC_H_INCLUDED
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief i2c flags
- */
-#define I2C_M_RD 0x0001 /* read data, from slave to master */
-#define I2C_M_BUSY 0x0100
-#define I2C_M_TEN 0x0400   /* this is a ten bit chip address */
-#define I2C_M_SEVEN 0x0800 /* this is a seven bit chip address */
-#define I2C_M_FAIL 0x1000
-#define I2C_M_STOP 0x8000 /* if I2C_FUNC_PROTOCOL_MANGLING */
-
-/**
- * \brief i2c Return codes
- */
-#define I2C_OK 0                     /* Operation successful */
-#define I2C_ACK -1                   /* Received ACK from device on I2C bus */
-#define I2C_NACK -2                  /* Received NACK from device on I2C bus */
-#define I2C_ERR_ARBLOST -3           /* Arbitration lost */
-#define I2C_ERR_BAD_ADDRESS -4       /* Bad address */
-#define I2C_ERR_BUS -5               /* Bus error */
-#define I2C_ERR_BUSY -6              /* Device busy */
-#define I2c_ERR_PACKAGE_COLLISION -7 /* Package collision */
-
-/**
- * \brief i2c I2C Modes
- */
-#define I2C_STANDARD_MODE 0x00
-#define I2C_FASTMODE 0x01
-#define I2C_HIGHSPEED_MODE 0x02
-
-/**
- * \brief i2c master message structure
- */
-struct _i2c_m_msg {
-	uint16_t          addr;
-	volatile uint16_t flags;
-	int32_t           len;
-	uint8_t *         buffer;
-};
-
-/**
- * \brief i2c master service
- */
-struct _i2c_m_service {
-	struct _i2c_m_msg msg;
-	uint16_t          mode;
-	uint16_t          trise;
-};
-
-/**
- * \brief i2c sync master device structure
- */
-struct _i2c_m_sync_device {
-	struct _i2c_m_service service;
-	void *                hw;
-};
-
-/**
- * \name HPL functions
- */
-
-/**
- * \brief Initialize I2C
- *
- * This function does low level I2C configuration.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- * \param[in] hw The pointer to hardware instance
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_sync_init(struct _i2c_m_sync_device *const i2c_dev, void *const hw);
-
-/**
- * \brief Deinitialize I2C
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_sync_deinit(struct _i2c_m_sync_device *const i2c_dev);
-
-/**
- * \brief Enable I2C module
- *
- * This function does low level I2C enable.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_sync_enable(struct _i2c_m_sync_device *const i2c_dev);
-
-/**
- * \brief Disable I2C module
- *
- * This function does low level I2C disable.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_sync_disable(struct _i2c_m_sync_device *const i2c_dev);
-
-/**
- * \brief Transfer data by I2C
- *
- * This function does low level I2C data transfer.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- * \param[in] msg The pointer to i2c msg structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_sync_transfer(struct _i2c_m_sync_device *const i2c_dev, struct _i2c_m_msg *msg);
-
-/**
- * \brief Set baud rate of I2C
- *
- * This function does low level I2C set baud rate.
- *
- * \param[in] i2c_dev The pointer to i2c device structure
- * \param[in] clkrate The clock rate(KHz) input to i2c module
- * \param[in] baudrate The demand baud rate(KHz) of i2c module
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_sync_set_baudrate(struct _i2c_m_sync_device *const i2c_dev, uint32_t clkrate, uint32_t baudrate);
-
-/**
- * \brief Send send condition on the I2C bus
- *
- * This function will generate a stop condition on the I2C bus
- *
- * \param[in] i2c_dev The pointer to i2c device struct
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_m_sync_send_stop(struct _i2c_m_sync_device *const i2c_dev);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_i2c_s_async.h b/atmel-samd/asf4/samd21/hal/include/hpl_i2c_s_async.h
deleted file mode 100644
index b240478f7..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_i2c_s_async.h
+++ /dev/null
@@ -1,194 +0,0 @@
-/**
- * \file
- *
- * \brief I2C Slave Hardware Proxy Layer(HPL) declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-#ifndef _HPL_I2C_S_ASYNC_H_INCLUDED
-#define _HPL_I2C_S_ASYNC_H_INCLUDED
-
-#include "hpl_i2c_s_sync.h"
-#include "hpl_irq.h"
-#include "utils.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief i2c callback types
- */
-enum _i2c_s_async_callback_type { I2C_S_DEVICE_ERROR, I2C_S_DEVICE_TX, I2C_S_DEVICE_RX_COMPLETE };
-
-/**
- * \brief Forward declaration of I2C Slave device
- */
-struct _i2c_s_async_device;
-
-/**
- * \brief i2c slave callback function type
- */
-typedef void (*_i2c_s_async_cb_t)(struct _i2c_s_async_device *device);
-
-/**
- * \brief i2c slave callback pointers structure
- */
-struct _i2c_s_async_callback {
-	void (*error)(struct _i2c_s_async_device *const device);
-	void (*tx)(struct _i2c_s_async_device *const device);
-	void (*rx_done)(struct _i2c_s_async_device *const device, const uint8_t data);
-};
-
-/**
- * \brief i2c slave device structure
- */
-struct _i2c_s_async_device {
-	void *                       hw;
-	struct _i2c_s_async_callback cb;
-	struct _irq_descriptor       irq;
-};
-
-/**
- * \name HPL functions
- */
-
-/**
- * \brief Initialize asynchronous I2C slave
- *
- * This function does low level I2C configuration.
- *
- * \param[in] device The pointer to i2c interrupt device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_async_init(struct _i2c_s_async_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize asynchronous I2C in interrupt mode
- *
- * \param[in] device The pointer to i2c device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_async_deinit(struct _i2c_s_async_device *const device);
-
-/**
- * \brief Enable I2C module
- *
- * This function does low level I2C enable.
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_async_enable(struct _i2c_s_async_device *const device);
-
-/**
- * \brief Disable I2C module
- *
- * This function does low level I2C disable.
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_async_disable(struct _i2c_s_async_device *const device);
-
-/**
- * \brief Check if 10-bit addressing mode is on
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Cheking status
- * \retval 1 10-bit addressing mode is on
- * \retval 0 10-bit addressing mode is off
- */
-int32_t _i2c_s_async_is_10bit_addressing_on(const struct _i2c_s_async_device *const device);
-
-/**
- * \brief Set I2C slave address
- *
- * \param[in] device The pointer to i2c slave device structure
- * \param[in] address Address to set
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_async_set_address(struct _i2c_s_async_device *const device, const uint16_t address);
-
-/**
- * \brief Write a byte to the given I2C instance
- *
- * \param[in] device The pointer to i2c slave device structure
- * \param[in] data Data to write
- */
-void _i2c_s_async_write_byte(struct _i2c_s_async_device *const device, const uint8_t data);
-
-/**
- * \brief Retrieve I2C slave status
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- *\return I2C slave status
- */
-i2c_s_status_t _i2c_s_async_get_status(const struct _i2c_s_async_device *const device);
-
-/**
- * \brief Abort data transmission
- *
- * \param[in] device The pointer to i2c device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_async_abort_transmission(const struct _i2c_s_async_device *const device);
-
-/**
- * \brief Enable/disable I2C slave interrupt
- *
- * param[in] device The pointer to I2C slave device instance
- * param[in] type The type of interrupt to disable/enable if applicable
- * param[in] disable Enable or disable
- */
-int32_t _i2c_s_async_set_irq_state(struct _i2c_s_async_device *const device, const enum _i2c_s_async_callback_type type,
-                                   const bool disable);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HPL_I2C_S_ASYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_i2c_s_sync.h b/atmel-samd/asf4/samd21/hal/include/hpl_i2c_s_sync.h
deleted file mode 100644
index a0f4fa465..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_i2c_s_sync.h
+++ /dev/null
@@ -1,185 +0,0 @@
-/**
- * \file
- *
- * \brief I2C Slave Hardware Proxy Layer(HPL) declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-#ifndef _HPL_I2C_S_SYNC_H_INCLUDED
-#define _HPL_I2C_S_SYNC_H_INCLUDED
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief I2C Slave status type
- */
-typedef uint32_t i2c_s_status_t;
-
-/**
- * \brief i2c slave device structure
- */
-struct _i2c_s_sync_device {
-	void *hw;
-};
-
-#include <compiler.h>
-
-/**
- * \name HPL functions
- */
-
-/**
- * \brief Initialize synchronous I2C slave
- *
- * This function does low level I2C configuration.
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_sync_init(struct _i2c_s_sync_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize synchronous I2C slave
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_sync_deinit(struct _i2c_s_sync_device *const device);
-
-/**
- * \brief Enable I2C module
- *
- * This function does low level I2C enable.
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_sync_enable(struct _i2c_s_sync_device *const device);
-
-/**
- * \brief Disable I2C module
- *
- * This function does low level I2C disable.
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_sync_disable(struct _i2c_s_sync_device *const device);
-
-/**
- * \brief Check if 10-bit addressing mode is on
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Cheking status
- * \retval 1 10-bit addressing mode is on
- * \retval 0 10-bit addressing mode is off
- */
-int32_t _i2c_s_sync_is_10bit_addressing_on(const struct _i2c_s_sync_device *const device);
-
-/**
- * \brief Set I2C slave address
- *
- * \param[in] device The pointer to i2c slave device structure
- * \param[in] address Address to set
- *
- * \return Return 0 for success and negative value for error
- */
-int32_t _i2c_s_sync_set_address(struct _i2c_s_sync_device *const device, const uint16_t address);
-
-/**
- * \brief Write a byte to the given I2C instance
- *
- * \param[in] device The pointer to i2c slave device structure
- * \param[in] data Data to write
- */
-void _i2c_s_sync_write_byte(struct _i2c_s_sync_device *const device, const uint8_t data);
-
-/**
- * \brief Retrieve I2C slave status
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- *\return I2C slave status
- */
-i2c_s_status_t _i2c_s_sync_get_status(const struct _i2c_s_sync_device *const device);
-
-/**
- * \brief Read a byte from the given I2C instance
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Data received via I2C interface.
- */
-uint8_t _i2c_s_sync_read_byte(const struct _i2c_s_sync_device *const device);
-
-/**
- * \brief Check if I2C is ready to send next byte
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Status of the ready check.
- * \retval true if the I2C is ready to send next byte
- * \retval false if the I2C is not ready to send next byte
- */
-bool _i2c_s_sync_is_byte_sent(const struct _i2c_s_sync_device *const device);
-
-/**
- * \brief Check if there is data received by I2C
- *
- * \param[in] device The pointer to i2c slave device structure
- *
- * \return Status of the data received check.
- * \retval true if the I2C has received a byte
- * \retval false if the I2C has not received a byte
- */
-bool _i2c_s_sync_is_byte_received(const struct _i2c_s_sync_device *const device);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HPL_I2C_S_SYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_init.h b/atmel-samd/asf4/samd21/hal/include/hpl_init.h
deleted file mode 100644
index be54600c0..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_init.h
+++ /dev/null
@@ -1,134 +0,0 @@
-/**
- * \file
- *
- * \brief Init related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_INIT_H_INCLUDED
-#define _HPL_INIT_H_INCLUDED
-
-/**
- * \addtogroup HPL Init
- *
- * \section hpl_init_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Initializes clock sources
- */
-void _sysctrl_init_sources(void);
-
-/**
- * \brief Initializes Power Manager
- */
-void _pm_init(void);
-
-/**
- * \brief Initialize generators
- */
-void _gclk_init_generators(void);
-
-/**
- * \brief Initialize 32 kHz clock sources
- */
-void _osc32kctrl_init_sources(void);
-
-/**
- * \brief Initialize clock sources
- */
-void _oscctrl_init_sources(void);
-
-/**
- * \brief Initialize clock sources that need input reference clocks
- */
-void _sysctrl_init_referenced_generators(void);
-
-/**
- * \brief Initialize clock sources that need input reference clocks
- */
-void _oscctrl_init_referenced_generators(void);
-
-/**
- * \brief Initialize master clock generator
- */
-void _mclk_init(void);
-
-/**
- * \brief Initialize clock generator
- */
-void _lpmcu_misc_regs_init(void);
-
-/**
- * \brief Initialize clock generator
- */
-void _pmc_init(void);
-
-/**
- * \brief Set performance level
- *
- * \param[in] level The performance level to set
- */
-void _set_performance_level(const uint8_t level);
-
-/**
- * \brief Initialize the chip
- */
-void _init_chip(void);
-
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_INIT_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_irq.h b/atmel-samd/asf4/samd21/hal/include/hpl_irq.h
deleted file mode 100644
index 7325b5711..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_irq.h
+++ /dev/null
@@ -1,126 +0,0 @@
-/**
- * \file
- *
- * \brief IRQ related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_IRQ_H_INCLUDED
-#define _HPL_IRQ_H_INCLUDED
-
-/**
- * \addtogroup HPL IRQ
- *
- * \section hpl_irq_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief IRQ descriptor
- */
-struct _irq_descriptor {
-	void (*handler)(void *parameter);
-	void *parameter;
-};
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Retrieve current IRQ number
- *
- * \return The current IRQ number
- */
-uint8_t _irq_get_current(void);
-
-/**
- * \brief Disable the given IRQ
- *
- * \param[in] n The number of IRQ to disable
- */
-void _irq_disable(uint8_t n);
-
-/**
- * \brief Set the given IRQ
- *
- * \param[in] n The number of IRQ to set
- */
-void _irq_set(uint8_t n);
-
-/**
- * \brief Clear the given IRQ
- *
- * \param[in] n The number of IRQ to clear
- */
-void _irq_clear(uint8_t n);
-
-/**
- * \brief Enable the given IRQ
- *
- * \param[in] n The number of IRQ to enable
- */
-void _irq_enable(uint8_t n);
-
-/**
- * \brief Register IRQ handler
- *
- * \param[in] number The number registered IRQ
- * \param[in] irq The pointer to irq handler to register
- *
- * \return The status of IRQ handler registering
- * \retval -1 Passed parameters were invalid
- * \retval 0 The registering is completed successfully
- */
-void _irq_register(const uint8_t number, struct _irq_descriptor *const irq);
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_IRQ_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_missing_features.h b/atmel-samd/asf4/samd21/hal/include/hpl_missing_features.h
deleted file mode 100644
index 90fa16be4..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_missing_features.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/**
- * \file
- *
- * \brief Family-dependent missing features expected by HAL
- *
- * Copyright (C) 2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_MISSING_FEATURES
-#define _HPL_MISSING_FEATURES
-
-#endif /* _HPL_MISSING_FEATURES */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_pwm.h b/atmel-samd/asf4/samd21/hal/include/hpl_pwm.h
deleted file mode 100644
index 8deb54cc0..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_pwm.h
+++ /dev/null
@@ -1,203 +0,0 @@
-/**
- * \file
- *
- * \brief PWM related functionality declaration.
- *
- * Copyright (C) 2014-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-#ifndef _HPL_PWM_H_INCLUDED
-#define _HPL_PWM_H_INCLUDED
-
-/**
- * \addtogroup HPL PWM
- *
- * \section hpl_pwm_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <compiler.h>
-#include "hpl_irq.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief PWM callback types
- */
-enum _pwm_callback_type { PWM_DEVICE_PERIOD_CB, PWM_DEVICE_ERROR_CB };
-
-/**
- * \brief PWM pulse-width period
- */
-typedef uint32_t pwm_period_t;
-
-/**
- * \brief PWM device structure
- *
- * The PWM device structure forward declaration.
- */
-struct _pwm_device;
-
-/**
- * \brief PWM interrupt callbacks
- */
-struct _pwm_callback {
-	void (*pwm_period_cb)(struct _pwm_device *device);
-	void (*pwm_error_cb)(struct _pwm_device *device);
-};
-
-/**
- * \brief PWM descriptor device structure
- */
-struct _pwm_device {
-	struct _pwm_callback   callback;
-	struct _irq_descriptor irq;
-	void *                 hw;
-};
-
-/**
- * \brief PWM functions, pointers to low-level functions
- */
-struct _pwm_hpl_interface {
-	int32_t (*init)(struct _pwm_device *const device, void *const hw);
-	void (*deinit)(struct _pwm_device *const device);
-	void (*start_pwm)(struct _pwm_device *const device);
-	void (*stop_pwm)(struct _pwm_device *const device);
-	void (*set_pwm_param)(struct _pwm_device *const device, const pwm_period_t period, const pwm_period_t duty_cycle);
-	bool (*is_pwm_enabled)(const struct _pwm_device *const device);
-	pwm_period_t (*pwm_get_period)(const struct _pwm_device *const device);
-	uint32_t (*pwm_get_duty)(const struct _pwm_device *const device);
-	void (*set_irq_state)(struct _pwm_device *const device, const enum _pwm_callback_type type, const bool disable);
-};
-/**
- * \brief Initialize TC
- *
- * This function does low level TC configuration.
- *
- * \param[in] device The pointer to PWM device instance
- * \param[in] hw The pointer to hardware instance
- *
- * \return Initialization status.
- */
-int32_t _pwm_init(struct _pwm_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize TC
- *
- * \param[in] device The pointer to PWM device instance
- */
-void _pwm_deinit(struct _pwm_device *const device);
-
-/**
- * \brief Retrieve offset of the given tc hardware instance
- *
- * \param[in] device The pointer to PWM device instance
- *
- * \return The offset of the given tc hardware instance
- */
-uint8_t _pwm_get_hardware_offset(const struct _pwm_device *const device);
-
-/**
- * \brief Start hardware pwm
- *
- * \param[in] device The pointer to PWM device instance
- */
-void _pwm_enable(struct _pwm_device *const device);
-
-/**
- * \brief Stop hardware pwm
- *
- * \param[in] device The pointer to PWM device instance
- */
-void _pwm_disable(struct _pwm_device *const device);
-
-/**
- * \brief Set pwm parameter
- *
- * \param[in] device The pointer to PWM device instance
- * \param[in] period Total period of one PWM cycle.
- * \param[in] duty_cycle Period of PWM first half during one cycle.
- */
-void _pwm_set_param(struct _pwm_device *const device, const pwm_period_t period, const pwm_period_t duty_cycle);
-
-/**
- * \brief Check if pwm is working
- *
- * \param[in] device The pointer to PWM device instance
- *
- * \return Check status.
- * \retval true The given pwm is working
- * \retval false The given pwm is not working
- */
-bool _pwm_is_enabled(const struct _pwm_device *const device);
-
-/**
- * \brief Get pwm waveform period value
- *
- * \param[in] device The pointer to PWM device instance
- *
- * \return Period value.
- */
-pwm_period_t _pwm_get_period(const struct _pwm_device *const device);
-
-/**
- * \brief Get pwm waveform duty cycle value
- *
- * \param[in] device The pointer to PWM device instance
- *
- * \return Duty cycle value
- */
-uint32_t _pwm_get_duty(const struct _pwm_device *const device);
-
-/**
- * \brief Enable/disable PWM interrupt
- *
- * param[in] device The pointer to PWM device instance
- * param[in] type The type of interrupt to disable/enable if applicable
- * param[in] disable Enable or disable
- */
-void _pwm_set_irq_state(struct _pwm_device *const device, const enum _pwm_callback_type type, const bool disable);
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_PWM_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_reset.h b/atmel-samd/asf4/samd21/hal/include/hpl_reset.h
deleted file mode 100644
index 7cb48aff0..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_reset.h
+++ /dev/null
@@ -1,101 +0,0 @@
-/**
- * \file
- *
- * \brief Reset related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_RESET_H_INCLUDED
-#define _HPL_RESET_H_INCLUDED
-
-/**
- * \addtogroup HPL Reset
- *
- * \section hpl_reset_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#ifndef _UNIT_TEST_
-#include <compiler.h>
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief Reset reason enumeration
- *
- * The list of possible reset reasons.
- */
-enum reset_reason {
-	RESET_REASON_POR   = 1,
-	RESET_REASON_BOD12 = 2,
-	RESET_REASON_BOD33 = 4,
-	RESET_REASON_EXT   = 16,
-	RESET_REASON_WDT   = 32,
-	RESET_REASON_SYST  = 64,
-};
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Retrieve the reset reason
- *
- * Retrieves the reset reason of the last MCU reset.
- *
- *\return An enum value indicating the reason of the last reset.
- */
-enum reset_reason _get_reset_reason(void);
-
-/**
- * \brief Reset MCU
- */
-void _reset_mcu(void);
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_RESET_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_sleep.h b/atmel-samd/asf4/samd21/hal/include/hpl_sleep.h
deleted file mode 100644
index 3bd6a1cb2..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_sleep.h
+++ /dev/null
@@ -1,98 +0,0 @@
-/**
- * \file
- *
- * \brief Sleep related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SLEEP_H_INCLUDED
-#define _HPL_SLEEP_H_INCLUDED
-
-/**
- * \addtogroup HPL Sleep
- *
- * \section hpl_sleep_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#ifndef _UNIT_TEST_
-#include <compiler.h>
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Set the sleep mode for the device
- *
- * This function sets the sleep mode for the device.
- * For an overview of which systems are disabled in sleep for the different
- * sleep modes see datasheet.
- *
- * \param[in] mode Sleep mode to use
- *
- * \return the status of a sleep request
- * \retval -1 The requested sleep mode was invalid
- * \retval  0 The operation completed successfully, sleep mode is set
- */
-int32_t _set_sleep_mode(const uint8_t mode);
-
-/**
- * \brief Reset MCU
- */
-void _reset_mcu(void);
-
-/**
- * \brief Put MCU to sleep
- */
-void _go_to_sleep(void);
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_SLEEP_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_spi.h b/atmel-samd/asf4/samd21/hal/include/hpl_spi.h
deleted file mode 100644
index 14177642f..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_spi.h
+++ /dev/null
@@ -1,173 +0,0 @@
-/**
- * \file
- *
- * \brief SPI related functionality declaration.
- *
- * Copyright (C) 2014 - 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SPI_H_INCLUDED
-#define _HPL_SPI_H_INCLUDED
-
-#include <compiler.h>
-#include <utils.h>
-
-/**
- * \addtogroup hpl_spi HPL SPI
- *
- *@{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief SPI Dummy char is used when reading data from the SPI slave
- */
-#define SPI_DUMMY_CHAR 0x1ff
-
-/**
- *  \brief SPI message to let driver to process
- */
-//@{
-struct spi_msg {
-	/** Pointer to the output data buffer */
-	uint8_t *txbuf;
-	/** Pointer to the input data buffer */
-	uint8_t *rxbuf;
-	/** Size of the message data in SPI characters */
-	uint32_t size;
-};
-//@}
-
-/**
- *  \brief SPI transfer modes
- *  SPI transfer mode controls clock polarity and clock phase.
- *  Mode 0: leading edge is rising edge, data sample on leading edge.
- *  Mode 1: leading edge is rising edge, data sample on trailing edge.
- *  Mode 2: leading edge is falling edge, data sample on leading edge.
- *  Mode 3: leading edge is falling edge, data sample on trailing edge.
- */
-enum spi_transfer_mode {
-	/** Leading edge is rising edge, data sample on leading edge. */
-	SPI_MODE_0,
-	/** Leading edge is rising edge, data sample on trailing edge. */
-	SPI_MODE_1,
-	/** Leading edge is falling edge, data sample on leading edge. */
-	SPI_MODE_2,
-	/** Leading edge is falling edge, data sample on trailing edge. */
-	SPI_MODE_3
-};
-
-/**
- *  \brief SPI character sizes
- *  The character size influence the way the data is sent/received.
- *  For char size <= 8 data is stored byte by byte.
- *  For char size between 9 ~ 16 data is stored in 2-byte length.
- *  Note that the default and recommended char size is 8 bit since it's
- *  supported by all system.
- */
-enum spi_char_size {
-	/** Character size is 8 bit. */
-	SPI_CHAR_SIZE_8 = 0,
-	/** Character size is 9 bit. */
-	SPI_CHAR_SIZE_9 = 1,
-	/** Character size is 10 bit. */
-	SPI_CHAR_SIZE_10 = 2,
-	/** Character size is 11 bit. */
-	SPI_CHAR_SIZE_11 = 3,
-	/** Character size is 12 bit. */
-	SPI_CHAR_SIZE_12 = 4,
-	/** Character size is 13 bit. */
-	SPI_CHAR_SIZE_13 = 5,
-	/** Character size is 14 bit. */
-	SPI_CHAR_SIZE_14 = 6,
-	/** Character size is 15 bit. */
-	SPI_CHAR_SIZE_15 = 7,
-	/** Character size is 16 bit. */
-	SPI_CHAR_SIZE_16 = 8
-};
-
-/**
- *  \brief SPI data order
- */
-enum spi_data_order {
-	/** MSB goes first. */
-	SPI_DATA_ORDER_MSB_1ST = 0,
-	/** LSB goes first. */
-	SPI_DATA_ORDER_LSB_1ST = 1
-};
-
-/** \brief Transfer descriptor for SPI
- *  Transfer descriptor holds TX and RX buffers
- */
-struct spi_xfer {
-	/** Pointer to data buffer to TX */
-	uint8_t *txbuf;
-	/** Pointer to data buffer to RX */
-	uint8_t *rxbuf;
-	/** Size of data characters to TX & RX */
-	uint32_t size;
-};
-
-/** SPI generic driver. */
-struct spi_dev {
-	/** Pointer to the hardware base or private data for special device. */
-	void *prvt;
-	/** Reference start of sync/async variables */
-	uint32_t sync_async_misc[1];
-};
-
-/**
- *  \brief Calculate the baudrate value for hardware to use to set baudrate
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] clk Clock frequency (Hz) for baudrate generation.
- *  \param[in] baud Target baudrate (bps).
- *  \return Error or baudrate value.
- *  \retval >0 Baudrate value.
- *  \retval ERR_INVALID_ARG Calculation fail.
- */
-int32_t _spi_calc_baud_val(struct spi_dev *dev, const uint32_t clk, const uint32_t baud);
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-#endif /* ifndef _HPL_SPI_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_spi_async.h b/atmel-samd/asf4/samd21/hal/include/hpl_spi_async.h
deleted file mode 100644
index b81ef12af..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_spi_async.h
+++ /dev/null
@@ -1,137 +0,0 @@
-/**
- * \file
- *
- * \brief Common SPI related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SPI_ASYNC_H_INCLUDED
-#define _HPL_SPI_ASYNC_H_INCLUDED
-
-#include <hpl_spi.h>
-#include <hpl_irq.h>
-
-/**
- * \addtogroup hpl_spi HPL SPI
- *
- *@{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- *  \brief Callbacks the SPI driver must offer in async mode
- */
-//@{
-/** The callback types */
-enum _spi_async_dev_cb_type {
-	/** Callback type for transmit, see \ref _spi_async_dev_cb_xfer_t. */
-	SPI_DEV_CB_TX,
-	/** Callback type for receive, see \ref _spi_async_dev_cb_xfer_t. */
-	SPI_DEV_CB_RX,
-	/** Callback type for \ref _spi_async_dev_cb_complete_t. */
-	SPI_DEV_CB_COMPLETE,
-	/** Number of callbacks. */
-	SPI_DEV_CB_N
-};
-
-struct _spi_async_dev;
-
-/** \brief The prototype for callback on SPI transfer complete.
- *  If status code is zero, it indicates the normal completion, that is,
- *  SS deactivation.
- *  If status code belows zero, it indicates complete.
- */
-typedef void (*_spi_async_dev_cb_complete_t)(struct _spi_async_dev *dev, int32_t status);
-
-/** \brief The prototype for callback on SPI transmit/receive event
- *  For TX, the callback is invoked when transmit is done or ready to start
- *  transmit.
- *  For RX, the callback is invoked when receive is done or ready to read data,
- *  see \ref _spi_async_dev_read_one_t on data reading.
- *  Without DMA enabled, the callback is invoked on each character event.
- *  With DMA enabled, the callback is invoked on DMA buffer done.
- */
-typedef void (*_spi_async_dev_cb_xfer_t)(struct _spi_async_dev *dev);
-
-/**
- *  \brief The callbacks offered by SPI driver
- */
-struct _spi_async_dev_callbacks {
-	/** TX callback, see \ref _spi_async_dev_cb_xfer_t. */
-	_spi_async_dev_cb_xfer_t tx;
-	/** RX callback, see \ref _spi_async_dev_cb_xfer_t. */
-	_spi_async_dev_cb_xfer_t rx;
-	/** Complete or complete callback, see \ref _spi_async_dev_cb_complete_t. */
-	_spi_async_dev_cb_complete_t complete;
-};
-//@}
-
-/**
- *  \brief SPI async driver
- */
-//@{
-
-/** SPI driver to support async HAL */
-struct _spi_async_dev {
-	/** Pointer to the hardware base or private data for special device. */
-	void *prvt;
-	/** Data size, number of bytes for each character */
-	uint8_t char_size;
-	/** Dummy byte used in master mode when reading the slave */
-	uint16_t dummy_byte;
-
-	/** \brief Pointer to callback functions, ignored for polling mode
-	 *  Pointer to the callback functions so that initialize the driver to
-	 *  handle interrupts.
-	 */
-	struct _spi_async_dev_callbacks callbacks;
-	/** IRQ instance for SPI device. */
-	struct _irq_descriptor irq;
-};
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-#endif /* ifndef _HPL_SPI_ASYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_spi_dma.h b/atmel-samd/asf4/samd21/hal/include/hpl_spi_dma.h
deleted file mode 100644
index 3f2088c05..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_spi_dma.h
+++ /dev/null
@@ -1,98 +0,0 @@
-/**
- * \file
- *
- * \brief Common SPI DMA related functionality declaration.
- *
- * Copyright (C) 2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SPI_DMA_H_INCLUDED
-#define _HPL_SPI_DMA_H_INCLUDED
-
-#include <hpl_irq.h>
-#include <hpl_dma.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** The callback types */
-enum _spi_dma_dev_cb_type {
-	/** Callback type for DMA transmit. */
-	SPI_DEV_CB_DMA_TX,
-	/** Callback type for DMA receive. */
-	SPI_DEV_CB_DMA_RX,
-	/** Callback type for DMA error. */
-	SPI_DEV_CB_DMA_ERROR,
-	/** Number of callbacks. */
-	SPI_DEV_CB_DMA_N
-};
-
-struct _spi_dma_dev;
-
-/**
- *  \brief The prototype for callback on SPI DMA.
- */
-typedef void (*_spi_dma_cb_t)(struct _dma_resource *resource);
-
-/**
- *  \brief The callbacks offered by SPI driver
- */
-struct _spi_dma_dev_callbacks {
-	_spi_dma_cb_t tx;
-	_spi_dma_cb_t rx;
-	_spi_dma_cb_t error;
-};
-
-/** SPI driver to support DMA HAL */
-struct _spi_dma_dev {
-	/** Pointer to the hardware base or private data for special device. */
-	void *prvt;
-	/** Pointer to callback functions */
-	struct _spi_dma_dev_callbacks callbacks;
-	/** IRQ instance for SPI device. */
-	struct _irq_descriptor irq;
-	/** DMA resource */
-	struct _dma_resource *resource;
-};
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* ifndef _HPL_SPI_DMA_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_spi_m_async.h b/atmel-samd/asf4/samd21/hal/include/hpl_spi_m_async.h
deleted file mode 100644
index f2d330495..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_spi_m_async.h
+++ /dev/null
@@ -1,248 +0,0 @@
-/**
- * \file
- *
- * \brief SPI Slave Async related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SPI_M_ASYNC_H_INCLUDED
-#define _HPL_SPI_M_ASYNC_H_INCLUDED
-
-#include <hpl_spi.h>
-#include <hpl_spi_async.h>
-
-/**
- * \addtogroup hpl_spi HPL SPI
- *
- *
- *@{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** Uses common SPI async device driver. */
-#define _spi_m_async_dev _spi_async_dev
-
-#define _spi_m_async_dev_cb_type _spi_async_dev_cb_type
-
-/** Uses common SPI async device driver complete callback type. */
-#define _spi_m_async_dev_cb_complete_t _spi_async_dev_cb_complete_t
-
-/** Uses common SPI async device driver transfer callback type. */
-#define _spi_m_async_dev_cb_xfer_t _spi_async_dev_cb_xfer_t
-
-/**
- *  \brief Initialize SPI for access with interrupts
- *  It will load default hardware configuration and software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] hw Pointer to the hardware base.
- *  \retval ERR_INVALID_ARG Input parameter problem.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval ERR_DENIED SPI has been enabled.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_async_init(struct _spi_m_async_dev *dev, void *const hw);
-
-/**
- *  \brief Initialize SPI for access with interrupts
- *  Disable, reset the hardware and the software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_async_deinit(struct _spi_m_async_dev *dev);
-
-/**
- *  \brief Enable SPI for access with interrupts
- *  Enable the SPI and enable callback generation of receive and error
- *  interrupts.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG Input parameter problem.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_async_enable(struct _spi_m_async_dev *dev);
-
-/**
- *  \brief Disable SPI for access without interrupts
- *  Disable SPI and interrupts. Deactivate all CS pins if works as master.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_async_disable(struct _spi_m_async_dev *dev);
-
-/**
- *  \brief Set SPI transfer mode
- *  Set SPI transfer mode (\ref spi_transfer_mode),
- *  which controls clock polarity and clock phase.
- *  Mode 0: leading edge is rising edge, data sample on leading edge.
- *  Mode 1: leading edge is rising edge, data sample on trailing edge.
- *  Mode 2: leading edge is falling edge, data sample on leading edge.
- *  Mode 3: leading edge is falling edge, data sample on trailing edge.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] mode The SPI transfer mode.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_async_set_mode(struct _spi_m_async_dev *dev, const enum spi_transfer_mode mode);
-
-/**
- *  \brief Set SPI baudrate
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] baud_val The SPI baudrate value, see \ref _spi_calc_baud_val() on
- *                  how it's generated.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_async_set_baudrate(struct _spi_m_async_dev *dev, const uint32_t baud_val);
-
-/**
- *  \brief Set SPI baudrate
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] char_size The character size, see \ref spi_char_size.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_async_set_char_size(struct _spi_m_async_dev *dev, const enum spi_char_size char_size);
-
-/**
- *  \brief Set SPI data order
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] dord SPI data order (LSB/MSB first).
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_async_set_data_order(struct _spi_m_async_dev *dev, const enum spi_data_order dord);
-
-/**
- * \brief Enable interrupt on character output
- *
- * Enable interrupt when a new character can be written
- * to the SPI device.
- *
- * \param[in] dev   Pointer to the SPI device instance
- * \param[in] state true  = enable output interrupt
- *                  false = disable output interrupt
- *
- * \return Status code
- * \retval 0 Ok status
- */
-int32_t _spi_m_async_enable_tx(struct _spi_m_async_dev *dev, bool state);
-
-/**
- * \brief Enable interrupt on character input
- *
- * Enable interrupt when a new character is ready to be
- * read from the SPI device.
- *
- * \param[in] dev  Pointer to the SPI device instance
- * \param[in] state true  = enable input interrupts
- *                  false = disable input interrupt
- *
- * \return Status code
- * \retvat 0 OK Status
- */
-int32_t _spi_m_async_enable_rx(struct _spi_m_async_dev *dev, bool state);
-
-/**
- * \brief Enable interrupt on Slave Select (SS) rising
- *
- * \param[in] dev  Pointer to the SPI device instance
- * \param[in] state true  = enable input interrupts
- *                  false = disable input interrupt
- *
- * \return Status code
- * \retvat 0 OK Status
- */
-int32_t _spi_m_async_enable_ss_detect(struct _spi_m_async_dev *dev, bool state);
-
-/**
- *  \brief Read one character to SPI device instance
- *  \param[in, out] dev Pointer to the SPI device instance.
- *
- *  \return Character read from SPI module
- */
-uint16_t _spi_m_async_read_one(struct _spi_m_async_dev *dev);
-
-/**
- *  \brief Write one character to assigned buffer
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] data
- *
- *  \return Status code of write operation
- *  \retval 0 Write operation OK
- */
-int32_t _spi_m_async_write_one(struct _spi_m_async_dev *dev, uint16_t data);
-
-/**
- *  \brief Register the SPI device callback
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] cb_type The callback type.
- *  \param[in] func The callback function to register. NULL to disable callback.
- *  \return Always 0.
- */
-int32_t _spi_m_async_register_callback(struct _spi_m_async_dev *dev, const enum _spi_m_async_dev_cb_type cb_type,
-                                       const FUNC_PTR func);
-
-/**
- * \brief Enable/disable SPI master interrupt
- *
- * param[in] device The pointer to SPI master device instance
- * param[in] type The type of interrupt to disable/enable if applicable
- * param[in] state Enable or disable
- */
-void _spi_m_async_set_irq_state(struct _spi_m_async_dev *const device, const enum _spi_m_async_dev_cb_type type,
-                                const bool state);
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-#endif /* ifndef _HPL_SPI_M_ASYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_spi_m_dma.h b/atmel-samd/asf4/samd21/hal/include/hpl_spi_m_dma.h
deleted file mode 100644
index 5e676fdc5..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_spi_m_dma.h
+++ /dev/null
@@ -1,187 +0,0 @@
-/**
- * \file
- *
- * \brief SPI Master DMA related functionality declaration.
- *
- * Copyright (C) 2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SPI_M_DMA_H_INCLUDED
-#define _HPL_SPI_M_DMA_H_INCLUDED
-
-#include <hpl_spi.h>
-#include <hpl_spi_dma.h>
-
-/**
- * \addtogroup hpl_spi HPL SPI
- *
- *
- *@{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** Uses common SPI dma device driver. */
-#define _spi_m_dma_dev _spi_dma_dev
-
-#define _spi_m_dma_dev_cb_type _spi_dma_dev_cb_type
-
-/**
- *  \brief Initialize SPI for access with interrupts
- *  It will load default hardware configuration and software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] hw Pointer to the hardware base.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG Input parameter problem.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval ERR_DENIED SPI has been enabled.
- *  \retval 0 ERR_NONE is operation done successfully.
- */
-int32_t _spi_m_dma_init(struct _spi_m_dma_dev *dev, void *const hw);
-
-/**
- *  \brief Initialize SPI for access with interrupts
- *  Disable, reset the hardware and the software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 ERR_NONE is operation done successfully.
- */
-int32_t _spi_m_dma_deinit(struct _spi_m_dma_dev *dev);
-
-/**
- *  \brief Enable SPI for access with interrupts
- *  Enable the SPI and enable callback generation of receive and error
- *  interrupts.
- *  \param[in] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG Input parameter problem.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval 0 ERR_NONE is operation done successfully.
- */
-int32_t _spi_m_dma_enable(struct _spi_m_dma_dev *dev);
-
-/**
- *  \brief Disable SPI for access without interrupts
- *  Disable SPI and interrupts. Deactivate all CS pins if works as master.
- *  \param[in] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 ERR_NONE is operation done successfully.
- */
-int32_t _spi_m_dma_disable(struct _spi_m_dma_dev *dev);
-
-/**
- *  \brief Set SPI transfer mode
- *  Set SPI transfer mode (\ref spi_transfer_mode),
- *  which controls clock polarity and clock phase.
- *  Mode 0: leading edge is rising edge, data sample on leading edge.
- *  Mode 1: leading edge is rising edge, data sample on trailing edge.
- *  Mode 2: leading edge is falling edge, data sample on leading edge.
- *  Mode 3: leading edge is falling edge, data sample on trailing edge.
- *  \param[in] dev Pointer to the SPI device instance.
- *  \param[in] mode The SPI transfer mode.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 ERR_NONE is operation done successfully.
- */
-int32_t _spi_m_dma_set_mode(struct _spi_m_dma_dev *dev, const enum spi_transfer_mode mode);
-
-/**
- *  \brief Set SPI baudrate
- *  \param[in] dev Pointer to the SPI device instance.
- *  \param[in] baud_val The SPI baudrate value, see \ref _spi_calc_baud_val() on
- *                  how it's generated.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_dma_set_baudrate(struct _spi_m_dma_dev *dev, const uint32_t baud_val);
-
-/**
- *  \brief Set SPI baudrate
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] char_size The character size, see \ref spi_char_size.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_dma_set_char_size(struct _spi_m_dma_dev *dev, const enum spi_char_size char_size);
-
-/**
- *  \brief Set SPI data order
- *  \param[in] dev Pointer to the SPI device instance.
- *  \param[in] dord SPI data order (LSB/MSB first).
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_dma_set_data_order(struct _spi_m_dma_dev *dev, const enum spi_data_order dord);
-
-/**
- *  \brief Register the SPI device callback
- *  \param[in] dev Pointer to the SPI device instance.
- *  \param[in] cb_type The callback type.
- *  \param[in] func The callback function to register. NULL to disable callback.
- *  \return Always 0.
- */
-void _spi_m_dma_register_callback(struct _spi_m_dma_dev *dev, enum _spi_dma_dev_cb_type, _spi_dma_cb_t func);
-
-/** \brief Do SPI data transfer (TX & RX) with DMA
- *  Log the TX & RX buffers and transfer them in background. It never blocks.
- *
- *  \param[in] dev Pointer to the SPI device instance.
- *  \param[in] txbuf Pointer to the transfer information (\ref spi_transfer).
- *  \param[out] rxbuf Pointer to the receiver information (\ref spi_receive).
- *  \param[in] length spi transfer data length.
- *
- *  \return Operation status.
- *  \retval ERR_NONE Success.
- *  \retval ERR_BUSY Busy.
- */
-int32_t _spi_m_dma_transfer(struct _spi_m_dma_dev *dev, uint8_t const *txbuf, uint8_t *const rxbuf,
-                            const uint16_t length);
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-#endif /* ifndef _HPL_SPI_M_DMA_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_spi_m_sync.h b/atmel-samd/asf4/samd21/hal/include/hpl_spi_m_sync.h
deleted file mode 100644
index fff1db4f2..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_spi_m_sync.h
+++ /dev/null
@@ -1,171 +0,0 @@
-/**
- * \file
- *
- * \brief SPI related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SPI_M_SYNC_H_INCLUDED
-#define _HPL_SPI_M_SYNC_H_INCLUDED
-
-#include <hpl_spi.h>
-#include <hpl_spi_sync.h>
-
-/**
- * \addtogroup hpl_spi HPL SPI
- *
- *@{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** Uses common SPI async device driver. */
-#define _spi_m_sync_dev _spi_sync_dev
-
-/**
- *  \brief Initialize SPI for access without interrupts
- *  It will load default hardware configuration and software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] hw Pointer to the hardware base.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG Input parameter problem.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval ERR_DENIED SPI has been enabled.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_sync_init(struct _spi_m_sync_dev *dev, void *const hw);
-
-/**
- *  \brief Deinitialize SPI
- *  Disable, reset the hardware and the software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_sync_deinit(struct _spi_m_sync_dev *dev);
-
-/**
- *  \brief Enable SPI for access without interrupts
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_sync_enable(struct _spi_m_sync_dev *dev);
-
-/**
- *  \brief Disable SPI for access without interrupts
- *  Disable SPI. Deactivate all CS pins if works as master.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_sync_disable(struct _spi_m_sync_dev *dev);
-
-/**
- *  \brief Set SPI transfer mode
- *  Set SPI transfer mode (\ref spi_transfer_mode),
- *  which controls clock polarity and clock phase.
- *  Mode 0: leading edge is rising edge, data sample on leading edge.
- *  Mode 1: leading edge is rising edge, data sample on trailing edge.
- *  Mode 2: leading edge is falling edge, data sample on leading edge.
- *  Mode 3: leading edge is falling edge, data sample on trailing edge.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] mode The SPI transfer mode.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_sync_set_mode(struct _spi_m_sync_dev *dev, const enum spi_transfer_mode mode);
-
-/**
- *  \brief Set SPI baudrate
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] baud_val The SPI baudrate value, see \ref _spi_calc_baud_val() on
- *                  how it's generated.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_sync_set_baudrate(struct _spi_m_sync_dev *dev, const uint32_t baud_val);
-
-/**
- *  \brief Set SPI baudrate
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] char_size The character size, see \ref spi_char_size.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_sync_set_char_size(struct _spi_m_sync_dev *dev, const enum spi_char_size char_size);
-
-/**
- *  \brief Set SPI data order
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] dord SPI data order (LSB/MSB first).
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_m_sync_set_data_order(struct _spi_m_sync_dev *dev, const enum spi_data_order dord);
-
-/**
- *  \brief Transfer the whole message without interrupt
- *  Transfer the message, it will keep waiting until the message finish or
- *  error.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] msg Pointer to the message instance to process.
- *  \return Error or number of characters transferred.
- *  \retval ERR_BUSY SPI hardware is not ready to start transfer (not
- *                   enabled, busy applying settings, ...).
- *  \retval SPI_ERR_OVERFLOW Overflow error.
- *  \retval >=0 Number of characters transferred.
- */
-int32_t _spi_m_sync_trans(struct _spi_m_sync_dev *dev, const struct spi_msg *msg);
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-#endif /* ifndef _HPL_SPI_M_SYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_spi_s_async.h b/atmel-samd/asf4/samd21/hal/include/hpl_spi_s_async.h
deleted file mode 100644
index aec3c0a6f..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_spi_s_async.h
+++ /dev/null
@@ -1,227 +0,0 @@
-/**
- * \file
- *
- * \brief SPI Slave Async related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SPI_S_ASYNC_H_INCLUDED
-#define _HPL_SPI_S_ASYNC_H_INCLUDED
-
-#include <hpl_spi_async.h>
-
-/**
- * \addtogroup hpl_spi HPL SPI
- *
- *
- *@{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** Uses common SPI async device driver. */
-#define _spi_s_async_dev _spi_async_dev
-
-#define _spi_s_async_dev_cb_type _spi_async_dev_cb_type
-
-/** Uses common SPI async device driver complete callback type. */
-#define _spi_s_async_dev_cb_complete_t _spi_async_dev_cb_complete_t
-
-/** Uses common SPI async device driver transfer callback type. */
-#define _spi_s_async_dev_cb_xfer_t _spi_async_dev_cb_xfer_t
-
-/**
- *  \brief Initialize SPI for access with interrupts
- *  It will load default hardware configuration and software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] hw Pointer to the hardware base.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG Input parameter problem.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval ERR_DENIED SPI has been enabled.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_async_init(struct _spi_s_async_dev *dev, void *const hw);
-
-/**
- *  \brief Initialize SPI for access with interrupts
- *  Disable, reset the hardware and the software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_async_deinit(struct _spi_s_async_dev *dev);
-
-/**
- *  \brief Enable SPI for access with interrupts
- *  Enable the SPI and enable callback generation of receive and error
- *  interrupts.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG Input parameter problem.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_async_enable(struct _spi_s_async_dev *dev);
-
-/**
- *  \brief Disable SPI for access without interrupts
- *  Disable SPI and interrupts. Deactivate all CS pins if works as master.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_async_disable(struct _spi_s_async_dev *dev);
-
-/**
- *  \brief Set SPI transfer mode
- *  Set SPI transfer mode (\ref spi_transfer_mode),
- *  which controls clock polarity and clock phase.
- *  Mode 0: leading edge is rising edge, data sample on leading edge.
- *  Mode 1: leading edge is rising edge, data sample on trailing edge.
- *  Mode 2: leading edge is falling edge, data sample on leading edge.
- *  Mode 3: leading edge is falling edge, data sample on trailing edge.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] mode The SPI transfer mode.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_async_set_mode(struct _spi_s_async_dev *dev, const enum spi_transfer_mode mode);
-
-/**
- *  \brief Set SPI baudrate
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] char_size The character size, see \ref spi_char_size.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_async_set_char_size(struct _spi_s_async_dev *dev, const enum spi_char_size char_size);
-
-/**
- *  \brief Set SPI data order
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] dord SPI data order (LSB/MSB first).
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_async_set_data_order(struct _spi_s_async_dev *dev, const enum spi_data_order dord);
-
-/**
- * \brief Enable interrupt on character output
- *
- * Enable interrupt when a new character can be written
- * to the SPI device.
- *
- * \param[in] dev   Pointer to the SPI device instance
- * \param[in] state true  = enable output interrupt
- *                  false = disable output interrupt
- *
- * \return Status code
- * \retval 0 Ok status
- */
-int32_t _spi_s_async_enable_tx(struct _spi_s_async_dev *dev, bool state);
-
-/**
- * \brief Enable interrupt on character input
- *
- * Enable interrupt when a new character is ready to be
- * read from the SPI device.
- *
- * \param[in] dev  Pointer to the SPI device instance
- * \param[in] state true  = enable input interrupts
- *                  false = disable input interrupt
- *
- * \return Status code
- * \retvat 0 OK Status
- */
-int32_t _spi_s_async_enable_rx(struct _spi_s_async_dev *dev, bool state);
-
-/**
- * \brief Enable interrupt on Slave Select (SS) rising
- *
- * \param[in] dev  Pointer to the SPI device instance
- * \param[in] state true  = enable input interrupts
- *                  false = disable input interrupt
- *
- * \return Status code
- * \retvat 0 OK Status
- */
-int32_t _spi_s_async_enable_ss_detect(struct _spi_s_async_dev *dev, bool state);
-
-/**
- *  \brief Read one character to SPI device instance
- *  \param[in, out] dev Pointer to the SPI device instance.
- *
- *  \return Character read from SPI module
- */
-uint16_t _spi_s_async_read_one(struct _spi_s_async_dev *dev);
-
-/**
- *  \brief Write one character to assigned buffer
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] data
- *
- *  \return Status code of write operation
- *  \retval 0 Write operation OK
- */
-int32_t _spi_s_async_write_one(struct _spi_s_async_dev *dev, uint16_t data);
-
-/**
- *  \brief Register the SPI device callback
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] cb_type The callback type.
- *  \param[in] func The callback function to register. NULL to disable callback.
- *  \return Always 0.
- */
-int32_t _spi_s_async_register_callback(struct _spi_s_async_dev *dev, const enum _spi_s_async_dev_cb_type cb_type,
-                                       const FUNC_PTR func);
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-#endif /* ifndef _HPL_SPI_S_ASYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_spi_s_sync.h b/atmel-samd/asf4/samd21/hal/include/hpl_spi_s_sync.h
deleted file mode 100644
index d42368697..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_spi_s_sync.h
+++ /dev/null
@@ -1,237 +0,0 @@
-/**
- * \file
- *
- * \brief SPI related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SPI_S_SYNC_H_INCLUDED
-#define _HPL_SPI_S_SYNC_H_INCLUDED
-
-#include <hpl_spi_sync.h>
-
-/**
- * \addtogroup hpl_spi HPL SPI
- *
- *@{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** Uses common SPI async device driver. */
-#define _spi_s_sync_dev _spi_sync_dev
-
-/**
- *  \brief Initialize SPI for access without interrupts
- *  It will load default hardware configuration and software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] hw Pointer to the hardware base.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG Input parameter problem.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval ERR_DENIED SPI has been enabled.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_sync_init(struct _spi_s_sync_dev *dev, void *const hw);
-
-/**
- *  \brief Initialize SPI for access with interrupts
- *  Disable, reset the hardware and the software struct.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_sync_deinit(struct _spi_s_sync_dev *dev);
-
-/**
- *  \brief Enable SPI for access without interrupts
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI hardware not ready (resetting).
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_sync_enable(struct _spi_s_sync_dev *dev);
-
-/**
- *  \brief Disable SPI for access without interrupts
- *  Disable SPI. Deactivate all CS pins if works as master.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \return Operation status.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_sync_disable(struct _spi_s_sync_dev *dev);
-
-/**
- *  \brief Set SPI transfer mode
- *  Set SPI transfer mode (\ref spi_transfer_mode),
- *  which controls clock polarity and clock phase.
- *  Mode 0: leading edge is rising edge, data sample on leading edge.
- *  Mode 1: leading edge is rising edge, data sample on trailing edge.
- *  Mode 2: leading edge is falling edge, data sample on leading edge.
- *  Mode 3: leading edge is falling edge, data sample on trailing edge.
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] mode The SPI transfer mode.
- *  \return Operation status.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_sync_set_mode(struct _spi_s_sync_dev *dev, const enum spi_transfer_mode mode);
-
-/**
- *  \brief Set SPI baudrate
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] char_size The character size, see \ref spi_char_size.
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_sync_set_char_size(struct _spi_s_sync_dev *dev, const enum spi_char_size char_size);
-
-/**
- *  \brief Set SPI data order
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] dord SPI data order (LSB/MSB first).
- *  \return Operation status.
- *  \retval ERR_INVALID_ARG The character size is not supported.
- *  \retval ERR_BUSY SPI is not ready to accept new setting.
- *  \retval 0 Operation done successfully.
- */
-int32_t _spi_s_sync_set_data_order(struct _spi_s_sync_dev *dev, const enum spi_data_order dord);
-
-/**
- * \brief Enable interrupt on character output
- *
- * Enable interrupt when a new character can be written
- * to the SPI device.
- *
- * \param[in] dev   Pointer to the SPI device instance
- * \param[in] state true  = enable output interrupt
- *                  false = disable output interrupt
- *
- * \return Status code
- * \retval 0 Ok status
- */
-int32_t _spi_s_sync_enable_tx(struct _spi_s_sync_dev *dev, bool state);
-
-/**
- * \brief Enable interrupt on character input
- *
- * Enable interrupt when a new character is ready to be
- * read from the SPI device.
- *
- * \param[in] dev  Pointer to the SPI device instance
- * \param[in] state true  = enable input interrupts
- *                  false = disable input interrupt
- *
- * \return Status code
- * \retval 0 OK Status
- */
-int32_t _spi_s_sync_enable_rx(struct _spi_s_sync_dev *dev, bool state);
-
-/**
- *  \brief Read one character to SPI device instance
- *  \param[in, out] dev Pointer to the SPI device instance.
- *
- *  \return Character read from SPI module
- */
-uint16_t _spi_s_sync_read_one(struct _spi_s_sync_dev *dev);
-
-/**
- *  \brief Write one character to assigned buffer
- *  \param[in, out] dev Pointer to the SPI device instance.
- *  \param[in] data
- *
- *  \return Status code of write operation
- *  \retval 0 Write operation OK
- */
-int32_t _spi_s_sync_write_one(struct _spi_s_sync_dev *dev, uint16_t data);
-
-/**
- * \brief Check if TX ready
- *
- * \param[in] dev  Pointer to the SPI device instance
- *
- * \return TX ready state
- * \retval true TX ready
- * \retval false TX not ready
- */
-bool _spi_s_sync_is_tx_ready(struct _spi_s_sync_dev *dev);
-
-/**
- * \brief Check if RX character ready
- *
- * \param[in] dev  Pointer to the SPI device instance
- *
- * \return RX character ready state
- * \retval true RX character ready
- * \retval false RX character not ready
- */
-bool _spi_s_sync_is_rx_ready(struct _spi_s_sync_dev *dev);
-
-/**
- * \brief Check if SS deactiviation detected
- *
- * \param[in] dev  Pointer to the SPI device instance
- *
- * \return SS deactiviation state
- * \retval true SS deactiviation detected
- * \retval false SS deactiviation not detected
- */
-bool _spi_s_sync_is_ss_deactivated(struct _spi_s_sync_dev *dev);
-
-/**
- * \brief Check if error is detected
- *
- * \param[in] dev  Pointer to the SPI device instance
- *
- * \return Error detection state
- * \retval true Error detected
- * \retval false Error not detected
- */
-bool _spi_s_sync_is_error(struct _spi_s_sync_dev *dev);
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-#endif /* ifndef _HPL_SPI_S_SYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_spi_sync.h b/atmel-samd/asf4/samd21/hal/include/hpl_spi_sync.h
deleted file mode 100644
index a231a0bb5..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_spi_sync.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/**
- * \file
- *
- * \brief Common SPI related functionality declaration.
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SPI_SYNC_H_INCLUDED
-#define _HPL_SPI_SYNC_H_INCLUDED
-
-#include <compiler.h>
-#include <utils.h>
-
-#include <hpl_spi.h>
-
-/**
- * \addtogroup hpl_spi HPL SPI
- *
- * \section hpl_spi_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** SPI driver to support sync HAL */
-struct _spi_sync_dev {
-	/** Pointer to the hardware base or private data for special device. */
-	void *prvt;
-	/** Data size, number of bytes for each character */
-	uint8_t char_size;
-	/** Dummy byte used in master mode when reading the slave */
-	uint16_t dummy_byte;
-};
-
-#ifdef __cplusplus
-}
-#endif
-
-/**@}*/
-#endif /* ifndef _HPL_SPI_SYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_time_measure.h b/atmel-samd/asf4/samd21/hal/include/hpl_time_measure.h
deleted file mode 100644
index 7502a5910..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_time_measure.h
+++ /dev/null
@@ -1,104 +0,0 @@
-/**
- * \file
- *
- * \brief Time measure related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_TIME_MEASURE_H_INCLUDED
-#define _HPL_TIME_MEASURE_H_INCLUDED
-
-/**
- * \addtogroup HPL Time measure
- *
- * \section hpl_time_measure_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief System time type
- */
-typedef uint32_t system_time_t;
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Initialize system time module
- *
- * \param[in] hw The pointer to hardware instance to initialize
- */
-void _system_time_init(void *const hw);
-
-/**
- * \brief Deinitialize system time module
- *
- * \param[in] hw The pointer to hardware instance to initialize
- */
-void _system_time_deinit(void *const hw);
-
-/**
- * \brief Get system time
- *
- * \param[in] hw The pointer to hardware instance to initialize
- */
-system_time_t _system_time_get(const void *const hw);
-
-/**
- * \brief Get maximum possible system time
- *
- * \param[in] hw The pointer to hardware instance to initialize
- */
-system_time_t _system_time_get_max_time_value(const void *const hw);
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_TIME_MEASURE_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_timer.h b/atmel-samd/asf4/samd21/hal/include/hpl_timer.h
deleted file mode 100644
index d2434e8c4..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_timer.h
+++ /dev/null
@@ -1,170 +0,0 @@
-/**
- * \file
- *
- * \brief Timer related functionality declaration.
- *
- * Copyright (C) 2014 - 2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_TIMER_H_INCLUDED
-#define _HPL_TIMER_H_INCLUDED
-
-/**
- * \addtogroup HPL Timer
- *
- * \section hpl_timer_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <compiler.h>
-#include <hpl_irq.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief Timer device structure
- *
- * The Timer device structure forward declaration.
- */
-struct _timer_device;
-
-/**
- * \brief Timer interrupt callbacks
- */
-struct _timer_callbacks {
-	void (*period_expired)(struct _timer_device *device);
-};
-
-/**
- * \brief Timer device structure
- */
-struct _timer_device {
-	struct _timer_callbacks timer_cb;
-	struct _irq_descriptor  irq;
-	void *                  hw;
-};
-
-/**
- * \brief Timer functions, pointers to low-level functions
- */
-struct _timer_hpl_interface {
-	int32_t (*init)(struct _timer_device *const device, void *const hw);
-	void (*deinit)(struct _timer_device *const device);
-	void (*start_timer)(struct _timer_device *const device);
-	void (*stop_timer)(struct _timer_device *const device);
-	void (*set_timer_period)(struct _timer_device *const device, const uint32_t clock_cycles);
-	uint32_t (*get_period)(const struct _timer_device *const device);
-	bool (*is_timer_started)(const struct _timer_device *const device);
-	void (*set_timer_irq)(struct _timer_device *const device);
-};
-/**
- * \brief Initialize TCC
- *
- * This function does low level TCC configuration.
- *
- * \param[in] device The pointer to timer device instance
- * \param[in] hw The pointer to hardware instance
- *
- * \return Initialization status.
- */
-int32_t _timer_init(struct _timer_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize TCC
- *
- * \param[in] device The pointer to timer device instance
- */
-void _timer_deinit(struct _timer_device *const device);
-
-/**
- * \brief Start hardware timer
- *
- * \param[in] device The pointer to timer device instance
- */
-void _timer_start(struct _timer_device *const device);
-
-/**
- * \brief Stop hardware timer
- *
- * \param[in] device The pointer to timer device instance
- */
-void _timer_stop(struct _timer_device *const device);
-
-/**
- * \brief Set timer period
- *
- * \param[in] device The pointer to timer device instance
- */
-void _timer_set_period(struct _timer_device *const device, const uint32_t clock_cycles);
-
-/**
- * \brief Retrieve timer period
- *
- * \param[in] device The pointer to timer device instance
- *
- * \return Timer period
- */
-uint32_t _timer_get_period(const struct _timer_device *const device);
-
-/**
- * \brief Check if timer is running
- *
- * \param[in] device The pointer to timer device instance
- *
- * \return Check status.
- * \retval true The given timer is running
- * \retval false The given timer is not running
- */
-bool _timer_is_started(const struct _timer_device *const device);
-
-/**
- * \brief Set timer IRQ
- *
- * \param[in] device The pointer to timer device instance
- */
-void _timer_set_irq(struct _timer_device *const device);
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_TIMER_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_usart.h b/atmel-samd/asf4/samd21/hal/include/hpl_usart.h
deleted file mode 100644
index f6235de93..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_usart.h
+++ /dev/null
@@ -1,123 +0,0 @@
-/**
- * \file
- *
- * \brief USART related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_USART_H_INCLUDED
-#define _HPL_USART_H_INCLUDED
-
-/**
- * \addtogroup HPL USART SYNC
- *
- * \section hpl_usart_sync_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <compiler.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief USART flow control state
- */
-union usart_flow_control_state {
-	struct {
-		uint8_t cts : 1;
-		uint8_t rts : 1;
-		uint8_t unavailable : 1;
-		uint8_t reserved : 5;
-	} bit;
-	uint8_t value;
-};
-
-/**
- * \brief USART baud rate mode
- */
-enum usart_baud_rate_mode { USART_BAUDRATE_ASYNCH_ARITHMETIC, USART_BAUDRATE_ASYNCH_FRACTIONAL, USART_BAUDRATE_SYNCH };
-
-/**
- * \brief USART data order
- */
-enum usart_data_order { USART_DATA_ORDER_MSB = 0, USART_DATA_ORDER_LSB = 1 };
-
-/**
- * \brief USART mode
- */
-enum usart_mode { USART_MODE_ASYNCHRONOUS = 0, USART_MODE_SYNCHRONOUS = 1 };
-
-/**
- * \brief USART parity
- */
-enum usart_parity {
-	USART_PARITY_EVEN  = 0,
-	USART_PARITY_ODD   = 1,
-	USART_PARITY_NONE  = 2,
-	USART_PARITY_SPACE = 3,
-	USART_PARITY_MARK  = 4
-};
-
-/**
- * \brief USART stop bits mode
- */
-enum usart_stop_bits { USART_STOP_BITS_ONE = 0, USART_STOP_BITS_TWO = 1, USART_STOP_BITS_ONE_P_FIVE = 2 };
-
-/**
- * \brief USART character size
- */
-enum usart_character_size {
-	USART_CHARACTER_SIZE_8BITS = 0,
-	USART_CHARACTER_SIZE_9BITS = 1,
-	USART_CHARACTER_SIZE_5BITS = 5,
-	USART_CHARACTER_SIZE_6BITS = 6,
-	USART_CHARACTER_SIZE_7BITS = 7
-};
-
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_USART_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_usart_async.h b/atmel-samd/asf4/samd21/hal/include/hpl_usart_async.h
deleted file mode 100644
index 1bcb3da44..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_usart_async.h
+++ /dev/null
@@ -1,280 +0,0 @@
-/**
- * \file
- *
- * \brief USART related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_USART_ASYNC_H_INCLUDED
-#define _HPL_USART_ASYNC_H_INCLUDED
-
-/**
- * \addtogroup HPL USART
- *
- * \section hpl_usart_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include "hpl_usart.h"
-#include "hpl_irq.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief USART callback types
- */
-enum _usart_async_callback_type { USART_ASYNC_BYTE_SENT, USART_ASYNC_RX_DONE, USART_ASYNC_TX_DONE, USART_ASYNC_ERROR };
-
-/**
- * \brief USART device structure
- *
- * The USART device structure forward declaration.
- */
-struct _usart_async_device;
-
-/**
- * \brief USART interrupt callbacks
- */
-struct _usart_async_callbacks {
-	void (*tx_byte_sent)(struct _usart_async_device *device);
-	void (*rx_done_cb)(struct _usart_async_device *device, uint8_t data);
-	void (*tx_done_cb)(struct _usart_async_device *device);
-	void (*error_cb)(struct _usart_async_device *device);
-};
-
-/**
- * \brief USART descriptor device structure
- */
-struct _usart_async_device {
-	struct _usart_async_callbacks usart_cb;
-	struct _irq_descriptor        irq;
-	void *                        hw;
-};
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Initialize asynchronous USART
- *
- * This function does low level USART configuration.
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] hw The pointer to hardware instance
- *
- * \return Initialization status
- */
-int32_t _usart_async_init(struct _usart_async_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize USART
- *
- * This function closes the given USART by disabling its clock.
- *
- * \param[in] device The pointer to USART device instance
- */
-void _usart_async_deinit(struct _usart_async_device *const device);
-
-/**
- * \brief Enable usart module
- *
- * This function will enable the usart module
- *
- * \param[in] device The pointer to USART device instance
- */
-void _usart_async_enable(struct _usart_async_device *const device);
-
-/**
- * \brief Disable usart module
- *
- * This function will disable the usart module
- *
- * \param[in] device The pointer to USART device instance
- */
-void _usart_async_disable(struct _usart_async_device *const device);
-
-/**
- * \brief Calculate baud rate register value
- *
- * \param[in] baud Required baud rate
- * \param[in] clock_rate clock frequency
- * \param[in] samples The number of samples
- * \param[in] mode USART mode
- * \param[in] fraction A fraction value
- *
- * \return Calculated baud rate register value
- */
-uint16_t _usart_async_calculate_baud_rate(const uint32_t baud, const uint32_t clock_rate, const uint8_t samples,
-                                          const enum usart_baud_rate_mode mode, const uint8_t fraction);
-
-/**
- * \brief Set baud rate
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] baud_rate A baud rate to set
- */
-void _usart_async_set_baud_rate(struct _usart_async_device *const device, const uint32_t baud_rate);
-
-/**
- * \brief Set data order
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] order A data order to set
- */
-void _usart_async_set_data_order(struct _usart_async_device *const device, const enum usart_data_order order);
-
-/**
- * \brief Set mode
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] mode A mode to set
- */
-void _usart_async_set_mode(struct _usart_async_device *const device, const enum usart_mode mode);
-
-/**
- * \brief Set parity
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] parity A parity to set
- */
-void _usart_async_set_parity(struct _usart_async_device *const device, const enum usart_parity parity);
-
-/**
- * \brief Set stop bits mode
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] stop_bits A stop bits mode to set
- */
-void _usart_async_set_stop_bits(struct _usart_async_device *const device, const enum usart_stop_bits stop_bits);
-
-/**
- * \brief Set character size
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] size A character size to set
- */
-void _usart_async_set_character_size(struct _usart_async_device *const device, const enum usart_character_size size);
-
-/**
- * \brief Retrieve usart status
- *
- * \param[in] device The pointer to USART device instance
- */
-uint32_t _usart_async_get_status(const struct _usart_async_device *const device);
-
-/**
- * \brief Write a byte to the given USART instance
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] data Data to write
- */
-void _usart_async_write_byte(struct _usart_async_device *const device, uint8_t data);
-
-/**
- * \brief Check if USART is ready to send next byte
- *
- * \param[in] device The pointer to USART device instance
- *
- * \return Status of the ready check.
- * \retval true if the USART is ready to send next byte
- * \retval false if the USART is not ready to send next byte
- */
-bool _usart_async_is_byte_sent(const struct _usart_async_device *const device);
-
-/**
- * \brief Set the state of flow control pins
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] state - A state of flow control pins to set
- */
-void _usart_async_set_flow_control_state(struct _usart_async_device *const    device,
-                                         const union usart_flow_control_state state);
-
-/**
- * \brief Retrieve the state of flow control pins
- *
- * This function retrieves the of flow control pins.
- *
- * \return USART_FLOW_CONTROL_STATE_UNAVAILABLE.
- */
-union usart_flow_control_state _usart_async_get_flow_control_state(const struct _usart_async_device *const device);
-
-/**
- * \brief Enable data register empty interrupt
- *
- * \param[in] device The pointer to USART device instance
- */
-void _usart_async_enable_byte_sent_irq(struct _usart_async_device *const device);
-
-/**
- * \brief Enable transmission complete interrupt
- *
- * \param[in] device The pointer to USART device instance
- */
-void _usart_async_enable_tx_done_irq(struct _usart_async_device *const device);
-
-/**
- * \brief Retrieve ordinal number of the given USART hardware instance
- *
- * \param[in] device The pointer to USART device instance
- *
- * \return The ordinal number of the given USART hardware instance
- */
-uint8_t _usart_async_get_hardware_index(const struct _usart_async_device *const device);
-
-/**
- * \brief Enable/disable USART interrupt
- *
- * param[in] device The pointer to USART device instance
- * param[in] type The type of interrupt to disable/enable if applicable
- * param[in] state Enable or disable
- */
-void _usart_async_set_irq_state(struct _usart_async_device *const device, const enum _usart_async_callback_type type,
-                                const bool state);
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_USART_ASYNC_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_usart_sync.h b/atmel-samd/asf4/samd21/hal/include/hpl_usart_sync.h
deleted file mode 100644
index c7881583c..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_usart_sync.h
+++ /dev/null
@@ -1,253 +0,0 @@
-/**
- * \file
- *
- * \brief USART related functionality declaration.
- *
- * Copyright (C) 2014 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_SYNC_USART_H_INCLUDED
-#define _HPL_SYNC_USART_H_INCLUDED
-
-/**
- * \addtogroup HPL USART SYNC
- *
- * \section hpl_usart_sync_rev Revision History
- * - v1.0.0 Initial Release
- *
- *@{
- */
-
-#include <hpl_usart.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief USART descriptor device structure
- */
-struct _usart_sync_device {
-	void *hw;
-};
-
-/**
- * \name HPL functions
- */
-//@{
-/**
- * \brief Initialize synchronous USART
- *
- * This function does low level USART configuration.
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] hw The pointer to hardware instance
- *
- * \return Initialization status
- */
-int32_t _usart_sync_init(struct _usart_sync_device *const device, void *const hw);
-
-/**
- * \brief Deinitialize USART
- *
- * This function closes the given USART by disabling its clock.
- *
- * \param[in] device The pointer to USART device instance
- */
-void _usart_sync_deinit(struct _usart_sync_device *const device);
-
-/**
- * \brief Enable usart module
- *
- * This function will enable the usart module
- *
- * \param[in] device The pointer to USART device instance
- */
-void _usart_sync_enable(struct _usart_sync_device *const device);
-
-/**
- * \brief Disable usart module
- *
- * This function will disable the usart module
- *
- * \param[in] device The pointer to USART device instance
- */
-void _usart_sync_disable(struct _usart_sync_device *const device);
-
-/**
- * \brief Calculate baud rate register value
- *
- * \param[in] baud Required baud rate
- * \param[in] clock_rate clock frequency
- * \param[in] samples The number of samples
- * \param[in] mode USART mode
- * \param[in] fraction A fraction value
- *
- * \return Calculated baud rate register value
- */
-uint16_t _usart_sync_calculate_baud_rate(const uint32_t baud, const uint32_t clock_rate, const uint8_t samples,
-                                         const enum usart_baud_rate_mode mode, const uint8_t fraction);
-
-/**
- * \brief Set baud rate
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] baud_rate A baud rate to set
- */
-void _usart_sync_set_baud_rate(struct _usart_sync_device *const device, const uint32_t baud_rate);
-
-/**
- * \brief Set data order
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] order A data order to set
- */
-void _usart_sync_set_data_order(struct _usart_sync_device *const device, const enum usart_data_order order);
-
-/**
- * \brief Set mode
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] mode A mode to set
- */
-void _usart_sync_set_mode(struct _usart_sync_device *const device, const enum usart_mode mode);
-
-/**
- * \brief Set parity
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] parity A parity to set
- */
-void _usart_sync_set_parity(struct _usart_sync_device *const device, const enum usart_parity parity);
-
-/**
- * \brief Set stop bits mode
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] stop_bits A stop bits mode to set
- */
-void _usart_sync_set_stop_bits(struct _usart_sync_device *const device, const enum usart_stop_bits stop_bits);
-
-/**
- * \brief Set character size
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] size A character size to set
- */
-void _usart_sync_set_character_size(struct _usart_sync_device *const device, const enum usart_character_size size);
-
-/**
- * \brief Retrieve usart status
- *
- * \param[in] device The pointer to USART device instance
- */
-uint32_t _usart_sync_get_status(const struct _usart_sync_device *const device);
-
-/**
- * \brief Write a byte to the given USART instance
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] data Data to write
- */
-void _usart_sync_write_byte(struct _usart_sync_device *const device, uint8_t data);
-
-/**
- * \brief Read a byte from the given USART instance
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] data Data to write
- *
- * \return Data received via USART interface.
- */
-uint8_t _usart_sync_read_byte(const struct _usart_sync_device *const device);
-
-/**
- * \brief Check if USART is ready to send next byte
- *
- * \param[in] device The pointer to USART device instance
- *
- * \return Status of the ready check.
- * \retval true if the USART is ready to send next byte
- * \retval false if the USART is not ready to send next byte
- */
-bool _usart_sync_is_byte_sent(const struct _usart_sync_device *const device);
-
-/**
- * \brief Check if there is data received by USART
- *
- * \param[in] device The pointer to USART device instance
- *
- * \return Status of the data received check.
- * \retval true if the USART has received a byte
- * \retval false if the USART has not received a byte
- */
-bool _usart_sync_is_byte_received(const struct _usart_sync_device *const device);
-
-/**
- * \brief Set the state of flow control pins
- *
- * \param[in] device The pointer to USART device instance
- * \param[in] state - A state of flow control pins to set
- */
-void _usart_sync_set_flow_control_state(struct _usart_sync_device *const     device,
-                                        const union usart_flow_control_state state);
-
-/**
- * \brief Retrieve the state of flow control pins
- *
- * This function retrieves the of flow control pins.
- *
- * \return USART_FLOW_CONTROL_STATE_UNAVAILABLE.
- */
-union usart_flow_control_state _usart_sync_get_flow_control_state(const struct _usart_sync_device *const device);
-
-/**
- * \brief Retrieve ordinal number of the given USART hardware instance
- *
- * \param[in] device The pointer to USART device instance
- *
- * \return The ordinal number of the given USART hardware instance
- */
-uint8_t _usart_sync_get_hardware_index(const struct _usart_sync_device *const device);
-//@}
-
-#ifdef __cplusplus
-}
-#endif
-/**@}*/
-#endif /* _HPL_SYNC_USART_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_usb.h b/atmel-samd/asf4/samd21/hal/include/hpl_usb.h
deleted file mode 100644
index d31bd9785..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_usb.h
+++ /dev/null
@@ -1,281 +0,0 @@
-/**
- * \file
- *
- * \brief SAM USB HPL
- *
- * Copyright (C) 2015 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_USB_H_INCLUDED
-#define _HPL_USB_H_INCLUDED
-
-#include <compiler.h>
-#include <utils.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** \name USB Spec definitions */
-/*@{*/
-
-/** Return 8-bit unsigned USB data. */
-#define USB_GET_U8(addr, offset) (((uint8_t *)(addr))[(offset)])
-
-/** Return 16-bit unsigned USB data. */
-#define USB_GET_U16(addr, offset) ((((uint8_t *)(addr))[(offset) + 0] << 0) + (((uint8_t *)(addr))[(offset) + 1] << 8))
-
-/** Return 32-bit unsigned USB data. */
-#define USB_GET_U32(addr, offset)                                                                                      \
-	((((uint8_t *)(addr))[(offset) + 0] << 0) + (((uint8_t *)(addr))[(offset) + 1] << 8)                               \
-	 + (((uint8_t *)(addr))[(offset) + 2] << 16)                                                                       \
-	 + (((uint8_t *)(addr))[(offset) + 3] << 32))
-
-/** Offset of bmRequestType in USB request buffer. */
-#define USB_bmRequestType_Offset 0
-
-/** Offset of bRequest in USB request buffer. */
-#define USB_bRequest_Offset 1
-
-/** Offset of wValue in USB request buffer. */
-#define USB_wValue_Offset 2
-
-/** Offset of wIndex in USB request buffer. */
-#define USB_wIndex_Offset 4
-
-/** Offset of wLength in USB request buffer. */
-#define USB_wLength_Offset 6
-
-/** Get value of bmRequestType from USB request. */
-#define USB_GET_bmRequestType(req) USB_GET_U8((req), USB_bmRequestType_Offset)
-
-/** Get value of bRequest from USB request. */
-#define USB_GET_bRequest(req) USB_GET_U8((req), USB_bRequest_Offset)
-
-/** Get value of wValue from USB request. */
-#define USB_GET_wValue(req) USB_GET_U16((req), USB_wValue_Offset)
-
-/** Get value of wIndex from USB request. */
-#define USB_GET_wIndex(req) USB_GET_U16((req), USB_wIndex_Offset)
-
-/** Get value of wLength from USB request. */
-#define USB_GET_wLength(req) USB_GET_U16((req), USB_wLength_Offset)
-
-/** USB request IN indication of bmRequestType. */
-#define USB_REQ_TYPE_IN 0x80u
-
-/** USB endpoint number mask of bEndpointAddress. */
-#define USB_EP_N_MASK 0x0Fu
-
-/** USB endpoint direction bit of bEndpointAddress. */
-#define USB_EP_DIR 0x80u
-
-/** Get USB endpoint direction from endpoint address. */
-#define USB_EP_GET_DIR(ep_addr) ((ep_addr)&USB_EP_DIR)
-
-/** Get USB endpoint number from endpoint address. */
-#define USB_EP_GET_N(ep_addr) ((ep_addr)&USB_EP_N_MASK)
-
-/** Transfer type in EP descriptor bmAttributes: Control. */
-#define USB_EP_XTYPE_CTRL 0x0
-
-/** Transfer type in EP descriptor bmAttributes: Isochronous. */
-#define USB_EP_XTYPE_ISOCH 0x1
-
-/** Transfer type in EP descriptor bmAttributes: Bulk. */
-#define USB_EP_XTYPE_BULK 0x2
-
-/** Transfer type in EP descriptor bmAttributes: Interrupt. */
-#define USB_EP_XTYPE_INTERRUPT 0x3
-
-/** Transfer type mask in EP descriptor bmAttributes. */
-#define USB_EP_XTYPE_MASK 0x3u
-
-/*@}*/
-
-/** \name USB status codes
- *@{
- */
-/** USB operation is done successfully. */
-#define USB_OK 0
-/** USB (endpoint) is busy. */
-#define USB_BUSY 1
-/** USB (endpoint) is halted. */
-#define USB_HALTED 2
-
-/** General error. */
-#define USB_ERROR 0x10
-/** Operation is denied by hardware (e.g., syncing). */
-#define USB_ERR_DENIED 0x11
-/** Input parameter error. */
-#define USB_ERR_PARAM 0x12
-/** Functionality is not supported (e.g., initialize endpoint without cache to be control). */
-#define USB_ERR_FUNC 0x13
-/** Re-initialize, re-enable ... */
-#define USB_ERR_REDO 0x14
-/** Not enough resource (memory, endpoints ...). */
-#define USB_ERR_ALLOC_FAIL 0x15
-/*@}*/
-
-/** USB speed. */
-enum usb_speed {
-	/** USB Low Speed. */
-	USB_SPEED_LS,
-	/** USB Full Speed. */
-	USB_SPEED_FS,
-	/** USB High Speed. */
-	USB_SPEED_HS,
-	/** USB Super Speed. */
-	USB_SPEED_SS
-};
-
-/** USB transaction type. */
-enum usb_trans_type {
-	/** USB SETUP transaction. */
-	USB_TRANS_SETUP,
-	/** USB IN transaction. */
-	USB_TRANS_IN,
-	/** USB OUT transaction. */
-	USB_TRANS_OUT
-};
-
-/** USB events that generates the device callbacks. */
-enum usb_event {
-	/** USB VBus changed, with parameter as present/not present. */
-	USB_EV_VBUS,
-	/** USB RESET detected on bus. */
-	USB_EV_RESET,
-	/** USB wakeup. */
-	USB_EV_WAKEUP,
-	/** USB LPM suspend, with parameter as \ref usb_lpm_attributes. */
-	USB_EV_LPM_SUSPEND,
-	/** USB suspend. */
-	USB_EV_SUSPEND,
-	/** USB error, with parameter as error code. */
-	USB_EV_ERROR,
-	/** Number of USB event types. */
-	USB_EV_N
-};
-
-/** Control action for USB device endpoint stall. */
-enum usb_ep_stall_ctrl {
-	/** Clear stall of the endpoint. */
-	USB_EP_STALL_CLR,
-	/** Stall the endpoint. */
-	USB_EP_STALL_SET,
-	/** Return the stall status. */
-	USB_EP_STALL_GET
-};
-
-/** Control action for USB device endpoint halt. */
-enum usb_ep_halt_ctrl {
-	/** Clear halt of the endpoint. */
-	USB_EP_HALT_CLR = USB_EP_STALL_CLR,
-	/** Stall the endpoint. */
-	USB_EP_HALT_SET = USB_EP_STALL_SET,
-	/** Return the halt status. */
-	USB_EP_HALT_GET = USB_EP_STALL_GET
-};
-
-/** USB transactions status codes. */
-enum usb_trans_code {
-	/** TX or RX has been done without error. */
-	USB_TRANS_DONE,
-	/** The endpoint is stalled. */
-	USB_TRANS_STALL,
-	/** The endpoint transactions are aborted (cancel, control setup/status). */
-	USB_TRANS_ABORT,
-	/** The endpoint transactions are aborted by reset/disable. */
-	USB_TRANS_RESET,
-	/** Error is reported on the endpoint. */
-	USB_TRANS_ERROR
-};
-
-/** Transfer status codes. */
-enum usb_xfer_code {
-	/** Transfer is done without error, for ctrl it means status packet done. */
-	USB_XFER_DONE,
-	/** For control transfer only, data stage is done without error. */
-	USB_XFER_DATA,
-	/** Endpoint stall is set. */
-	USB_XFER_HALT,
-	/** Endpoint stall is cleared. */
-	USB_XFER_UNHALT,
-	/** Transfer is aborted. */
-	USB_XFER_ABORT,
-	/** Transfer is aborted because endpoint reset/disable. */
-	USB_XFER_RESET,
-	/** There was an error. */
-	USB_XFER_ERROR
-};
-
-/** USB endpoint errors. */
-enum usb_ep_error {
-	/** No error. */
-	USB_EP_NO_ERROR,
-	/** CRC error. */
-	USB_EP_ERR_CRC,
-	/** Endpoint transfer overflow. */
-	USB_EP_ERR_OVERFLOW,
-	/** Other endpoint errors. */
-	USB_EP_ERR_GENERAL
-};
-
-/** Endpoint transfer state. */
-enum usb_ep_state {
-	/** Endpoint is disabled. */
-	USB_EP_S_DISABLED,
-	/** Endpoint is not busy. */
-	USB_EP_S_IDLE,
-	/** Control transfer only, endpoint is transferring setup packet. */
-	USB_EP_S_X_SETUP,
-	/** Endpoint is transferring data. */
-	USB_EP_S_X_DATA,
-	/** Control transfer only, endpoint is in status stage. */
-	USB_EP_S_X_STATUS,
-	/** Endpoint is halted. */
-	USB_EP_S_HALTED,
-	/** Endpoint error. */
-	USB_EP_S_ERROR
-};
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HPL_USB_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_usb_device.h b/atmel-samd/asf4/samd21/hal/include/hpl_usb_device.h
deleted file mode 100644
index 640833f45..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_usb_device.h
+++ /dev/null
@@ -1,387 +0,0 @@
-/**
- * \file
- *
- * \brief SAM USB HPL
- *
- * Copyright (C) 2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_USB_DEVICE_H_INCLUDED
-#define _HPL_USB_DEVICE_H_INCLUDED
-
-#include <hpl_usb.h>
-#include "hpl_usb_config.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** USB Device callback type. */
-enum usb_d_cb_type {
-	/** USB device SOF callback. */
-	USB_D_CB_SOF,
-	/** USB device events callbacks. */
-	USB_D_CB_EVENT,
-	/** Number of types of USB device callback types. */
-	USB_D_CB_N
-};
-
-/** USB Device endpoint callback type. */
-enum usb_d_ep_cb_type {
-	/** USB device endpoint setup callback. */
-	USB_D_EP_CB_SETUP,
-	/** USB device endpoint more data callback. */
-	USB_D_EP_CB_MORE,
-	/** USB device endpoint transaction done or error callback. */
-	USB_D_EP_CB_XFER,
-	/** Number of types of USB device endpoint callback types. */
-	USB_D_EP_CB_N
-};
-
-/** Control action for USB device LPM handshake. */
-enum usb_d_lpm_ctrl {
-	/** No LPM handshake, not supported. */
-	USB_D_LPM_DISABLE,
-	/** ACK the LPM transaction. */
-	USB_D_LPM_ACK,
-	/** NYET the LPM transaction. */
-	USB_D_LPM_NYET
-};
-
-/**
- *  USB device transfer descriptor.
- */
-struct usb_d_transfer {
-	/** Pointer to data buffer to transfer.
-	 *  Note that it's recommended that the buffer is 32-bit aligned since
-	 *  some of USB peripheral require this.
-	 */
-	uint8_t *buf;
-	/** Transfer size, in number of bytes.
-	 *  Note that it's recommended that the buffer size is 32-bit aligned
-	 *  (modeled by 4) since some of USB peripheral require this.
-	 */
-	uint32_t size;
-	/** Endpoint address. */
-	uint8_t ep;
-	/** Append ZLP for IN transfer, wait ZLP for OUT transfer. */
-	uint8_t zlp;
-};
-
-/** USB device transactions status structure. */
-struct usb_d_trans_status {
-	/** Total data size. */
-	uint32_t size;
-	/** Total transfered data count. */
-	uint32_t count;
-	/** Endpoint address. */
-	uint8_t ep;
-	/** Endpoint type - CTRL/ISO/INT/BULK. */
-	uint8_t xtype : 2;
-	/** Transactions state, busy or not. */
-	uint8_t busy : 1;
-	/** Transactions state, setup received or not. */
-	uint8_t setup : 1;
-	/** Transactions state, stall or not. */
-	uint8_t stall : 1;
-	/** Transactions direction. */
-	uint8_t dir : 1;
-};
-
-/** Prototype function for callback that is invoked on USB device SOF. */
-typedef void (*_usb_d_dev_sof_cb_t)(void);
-
-/** Prototype function for callback that is invoked on USB device events. */
-typedef void (*_usb_d_dev_event_cb_t)(const enum usb_event, const uint32_t param);
-
-/** HPL USB device callbacks. */
-struct _usb_d_dev_callbacks {
-	/** Callback that is invoked on SOF. */
-	_usb_d_dev_sof_cb_t sof;
-	/** Callback that is invoked on USB RESET/WAKEUP/RESUME/SUSPEND. */
-	_usb_d_dev_event_cb_t event;
-};
-
-/** USB device endpoint callbacks. */
-enum usb_d_dev_ep_cb_type {
-	/** Setup packet is received. */
-	USB_D_DEV_EP_CB_SETUP,
-	/** Try to require more data. */
-	USB_D_DEV_EP_CB_MORE,
-	/** Transaction done OK/ERROR. */
-	USB_D_DEV_EP_CB_DONE,
-	/** Number of device endpoint callbacks. */
-	USB_D_DEV_EP_CB_N
-};
-
-/**
- *  Callback that is invoked when control SETUP packet has bee received.
- *  \ref _usb_d_dev_ep_read_req() must be invoked to read setup data, and allow
- *  IN/OUT transactions on control endpoint.
- */
-typedef void (*_usb_d_dev_ep_cb_setup_t)(const uint8_t ep);
-
-/** Callback that is invoked when buffer is done, but last packet is full size
- *  packet without ZLP. Return \c true if more data has been requested. */
-typedef bool (*_usb_d_dev_ep_cb_more_t)(const uint8_t ep, const uint32_t transfered);
-
-/** Callback that is invoked when all data is finished, including background
- *  transfer, or error happens. */
-typedef void (*_usb_d_dev_ep_cb_done_t)(const uint8_t ep, const int32_t code, const uint32_t transfered);
-
-/** Callbacks for HPL USB device endpoint. */
-struct _usb_d_dev_ep_callbacks {
-	/** Callback that is invoked when SETUP packet is received.
-	 *  \ref _usb_d_dev_ep_read_req() must be invoked to read setup data, and
-	 *  allow IN/OUT transactions on control endpoint.
-	 */
-	_usb_d_dev_ep_cb_setup_t setup;
-	/** Callback that is invoked to check if buffer is NULL and more data is
-	 *  required.
-	 *  It's called when last packet is full size packet, without
-	 *  auto ZLP enabled.
-	 *  It could be called when background transfer is still in progress.
-	 */
-	_usb_d_dev_ep_cb_more_t more;
-	/** Callback that is invoked when transaction is done, including background
-	 *  transfer, or error occurs.
-	 */
-	_usb_d_dev_ep_cb_done_t done;
-};
-
-/**
- * \brief Initialize the USB device instance
- * \return Operation result status.
- * \retval 0 Success.
- * \retval <0 Error code.
- */
-int32_t _usb_d_dev_init(void);
-
-/**
- * \brief Deinitialize the USB device instance
- * \return Operation result status.
- * \retval 0 Success.
- * \retval <0 Error code.
- */
-void _usb_d_dev_deinit(void);
-
-/**
- * \brief Register callback to handle USB device events
- * \param[in] type Callback type. See \ref usb_d_cb_type.
- * \param[in] func Pointer to callback function.
- *         Refer to \ref _usb_d_dev_callbacks for the prototypes.
- */
-void _usb_d_dev_register_callback(const enum usb_d_cb_type type, const FUNC_PTR func);
-
-/**
- * \brief Register callback to handle USB device endpoint events
- * \param[in] type Callback type. See \ref usb_d_dev_ep_cb_type.
- * \param[in] func Pointer to callback function.
- *         Refer to \ref _usb_d_dev_ep_callbacks for the prototypes.
- */
-void _usb_d_dev_register_ep_callback(const enum usb_d_dev_ep_cb_type type, const FUNC_PTR func);
-
-/**
- * \brief Enable the USB device
- * \return Operation result status.
- * \retval 0 Success.
- * \retval <0 Error code.
- */
-int32_t _usb_d_dev_enable(void);
-
-/**
- * \brief Disable the USB device
- * \return Operation result status.
- * \retval 0 Success.
- * \retval <0 Error code.
- */
-int32_t _usb_d_dev_disable(void);
-
-/**
- * \brief Attach the USB device
- */
-void _usb_d_dev_attach(void);
-
-/**
- * \brief Detach the USB device
- */
-void _usb_d_dev_detach(void);
-
-/**
- * \brief Send the USB device remote wakeup to host
- */
-void _usb_d_dev_send_remotewakeup(void);
-
-/**
- * \brief Get the USB device working speed
- * \return USB speed. See \ref usb_speed.
- */
-enum usb_speed _usb_d_dev_get_speed(void);
-
-/**
- * \brief Set the USB device address
- * \param[in] addr Address to be used.
- */
-void _usb_d_dev_set_address(const uint8_t addr);
-
-/**
- * \brief Get the USB device address
- * \return Address that is used.
- */
-uint8_t _usb_d_dev_get_address(void);
-
-/**
- * \brief Get the USB device frame number
- * \return The frame number.
- */
-uint16_t _usb_d_dev_get_frame_n(void);
-
-/**
- * \brief Get the USB device micro frame number
- * \return The micro frame number inside one frame (0~7).
- */
-uint8_t _usb_d_dev_get_uframe_n(void);
-
-/**
- * \brief Initialize and enable the USB device default endpoint 0
- * \param[in] max_pkt_siz Max endpoint size.
- * \return Operation result status.
- * \retval 0 Success.
- * \retval <0 Error code.
- */
-int32_t _usb_d_dev_ep0_init(const uint8_t max_pkt_siz);
-
-/**
- * \brief Initialize and enable the USB device endpoint
- * \param[in] ep Endpoint address,
- *               see endpoint descriptor details in USB spec.
- * \param[in] attr Endpoint attributes,
- *                 see endpoint descriptor details in USB spec.
- * \param[in] max_pkt_siz Endpoint size,
- *                        see endpoint descriptor details in USB spec.
- * \return Operation result status.
- * \retval 0 Success.
- * \retval <0 Error code.
- */
-int32_t _usb_d_dev_ep_init(const uint8_t ep, const uint8_t attr, uint16_t max_pkt_siz);
-
-/**
- * \brief Disable and deinitialize the USB device endpoint
-
- * \param[in] ep The endpoint to deinitialize.
- */
-void _usb_d_dev_ep_deinit(const uint8_t ep);
-
-/**
- * \brief Enable the endpoint
- * \param[in] ep The endpoint to enable.
- * \return Operation result status.
- * \retval 0 Success.
- * \retval <0 Error code.
- */
-int32_t _usb_d_dev_ep_enable(const uint8_t ep);
-
-/**
- * \brief Disable the endpoint
- * \param[in] ep The endpoint to disable.
- */
-void _usb_d_dev_ep_disable(const uint8_t ep);
-
-/**
- * \brief Set/Clear/Get USB device endpoint stall status
- * \param[in] ep Endpoint address.
- * \param[in] ctrl Operation selector. See \ref usb_ep_stall_ctrl.
- * \return Operation result or stall status.
- * \retval 0 Success or not stall.
- * \retval 1 Endpoint is stalled.
- * \retval -1 error.
- */
-int32_t _usb_d_dev_ep_stall(const uint8_t ep, const enum usb_ep_stall_ctrl ctrl);
-
-/**
- * \brief Read setup request data from specific endpoint
- * \param[in] ep Endpoint address.
- * \param[out] req_buf Pointer to buffer to locate the setup packet.
- * \return Number of bytes or error code.
- * \retval <0 error code.
- * \retval 0 No setup packet ready for read.
- * \retval >0 Size of bytes read, and ready to start IN/OUT. Note that if
- *         this number is over 8, only first 8 bytes will be copied.
- */
-int32_t _usb_d_dev_ep_read_req(const uint8_t ep, uint8_t *req_buf);
-
-/**
- * \brief Start USB device transfer
- *
- * On different USB peripheral hardware the transaction buffer address and size
- * may have different constraints. E.g., some hardware may require input address
- * 32-bit aligned, and input size 32-bit aligned. Refer to the corresponding
- * hardware usage reference documents.
- * The constraints are checked in implementation, with error code returned.
- *
- * \param[in] trans Pointer to the transaction description.
- * \return Operation result status.
- * \retval 1 Busy.
- * \retval 0 Success.
- * \retval <0 Error code.
- */
-int32_t _usb_d_dev_ep_trans(const struct usb_d_transfer *trans);
-
-/**
- * \brief Abort pending USB device transaction on specific endpoint
- * \param[in] ep Endpoint address to abort.
- */
-void _usb_d_dev_ep_abort(const uint8_t ep);
-
-/**
- * \brief Retrieve endpoint status.
- * \param[in] ep Endpoint address.
- * \param[out] stat Pointer to buffer to fill status description.
- * \return Status.
- * \retval 2 Packet writing.
- * \retval 1 Busy.
- * \retval 0 Ready.
- * \retval <0 Error code.
- */
-int32_t _usb_d_dev_ep_get_status(const uint8_t ep, struct usb_d_trans_status *stat);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HPL_USB_DEVICE_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_usb_host.h b/atmel-samd/asf4/samd21/hal/include/hpl_usb_host.h
deleted file mode 100644
index ee48ecc3a..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_usb_host.h
+++ /dev/null
@@ -1,628 +0,0 @@
-/**
- * \file
- *
- * \brief SAM USB host HPL
- *
- * Copyright (C) 2016 - 2017 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_USB_HOST_H_INCLUDED
-#define _HPL_USB_HOST_H_INCLUDED
-
-#include <hpl_usb.h>
-#include <hpl_irq.h>
-#include "hpl_usb_config.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** Driver version */
-#define USB_H_VERSION 0x00000001
-
-/**
- * @brief      USB HCD callback types
- */
-enum usb_h_cb_type {
-	/** SOF generated */
-	USB_H_CB_SOF,
-	/** Root Hub change detected */
-	USB_H_CB_ROOTHUB_CHANGE,
-	/** Number of USB HCD callback types */
-	USB_H_CB_N
-};
-
-/**
- * @brief      USB HCD resource strategy
- */
-enum usb_h_rsc_strategy {
-	/** Normal resource allocation, e.g.,
-     *  1 bank for interrupt endpoint,
-     *  2 bank for bulk endpoint and normal iso endpoint,
-     *  3 bank for iso high bandwidth endpoint.
-     */
-	USB_H_RSC_NORMAL = false,
-	/** Minimal resource allocation, e.g., only 1 bank for bulk endpoints */
-	USB_H_RSC_MINIMAL = true
-};
-
-/**
- * @brief      USB HCD pipe states
- */
-enum usb_h_pipe_state {
-	/** Pipe is free to allocate */
-	USB_H_PIPE_S_FREE = 0x00,
-	/** Pipe is in configuration */
-	USB_H_PIPE_S_CFG = 0x01,
-	/** Pipe is allocated and idle */
-	USB_H_PIPE_S_IDLE = 0x02,
-	/** Pipe in control setup stage */
-	USB_H_PIPE_S_SETUP = 0x03,
-	/** Pipe in data IN stage */
-	USB_H_PIPE_S_DATI = 0x05,
-	/** Pipe in data OUT stage */
-	USB_H_PIPE_S_DATO = 0x06,
-	/** Pipe in data IN ZLP stage */
-	USB_H_PIPE_S_ZLPI = 0x07,
-	/** Pipe in data OUT ZLP stage */
-	USB_H_PIPE_S_ZLPO = 0x08,
-	/** Pipe in control status IN stage */
-	USB_H_PIPE_S_STATI = 0x09,
-	/** Pipe in control status OUT stage */
-	USB_H_PIPE_S_STATO = 0x0A,
-	/** Taken by physical pipe (in process) */
-	USB_H_PIPE_S_TAKEN = 0x10
-};
-
-/**
- * @brief      USB HCD status code
- */
-enum usb_h_status {
-	/** OK */
-	USB_H_OK = ERR_NONE,
-	/** Busy */
-	USB_H_BUSY = ERR_BUSY,
-	/** Denied */
-	USB_H_DENIED = ERR_DENIED,
-	/** Timeout */
-	USB_H_TIMEOUT = ERR_TIMEOUT,
-	/** Abort */
-	USB_H_ABORT = ERR_ABORTED,
-	/** Stall protocol */
-	USB_H_STALL = ERR_PROTOCOL,
-	/** Transfer reset by pipe re-configure */
-	USB_H_RESET = ERR_REQ_FLUSHED,
-	/** Argument error */
-	USB_H_ERR_ARG = ERR_INVALID_ARG,
-	/** Operation not supported */
-	USB_H_ERR_UNSP_OP = ERR_UNSUPPORTED_OP,
-	/** No resource */
-	USB_H_ERR_NO_RSC = ERR_NO_RESOURCE,
-	/** Not initialized */
-	USB_H_ERR_NOT_INIT = ERR_NOT_INITIALIZED,
-	/** Some general error */
-	USB_H_ERR = ERR_IO
-};
-
-/** Forward declare for pipe structure */
-struct usb_h_pipe;
-
-/** Forward declare for driver descriptor structure */
-struct usb_h_desc;
-
-/**
- * \brief Prototyping USB HCD callback of SOF
- */
-typedef void (*usb_h_cb_sof_t)(struct usb_h_desc *drv);
-
-/**
- * \brief Prototyping USB HCD callback of root hub changing.
- * According to the bitmap size, max port number is 31.
- */
-typedef void (*usb_h_cb_roothub_t)(struct usb_h_desc *drv, uint8_t port, uint8_t ftr);
-
-/**
- * Prototyping USB HCD callback of pipe transfer done.
- * For control pipe, it's forced to call even if there is no transfer
- * in progress, since the pipe size could be changed at run time.
- */
-typedef void (*usb_h_pipe_cb_xfer_t)(struct usb_h_pipe *pipe);
-
-/** Access to max packet size of a pipe */
-#define usb_h_pipe_max_pkt_size(p) (p->max_pkt_size)
-
-/** Access to device address of a pipe */
-#define usb_h_pipe_dev_addr(p) (p->dev)
-
-/** Access to endpoint address of a pipe */
-#define usb_h_pipe_ep_addr(p) (p->ep)
-
-/** Access to state of a pipe */
-#define usb_h_pipe_state(p) (p->x.general.state)
-
-/** Access to status of a pipe */
-#define usb_h_pipe_status(p) (p->x.general.status)
-
-/**
- * @brief      USB Host Controller device structure
- */
-struct usb_h_desc {
-	/** Pointer to hardware base */
-	void *hw;
-	/** Pointer to private data for Host Controller driver */
-	void *prvt;
-	/** Interrupt handling descriptor */
-	struct _irq_descriptor irq;
-	/** Callback of SOF */
-	usb_h_cb_sof_t sof_cb;
-	/** Callback of root hub change */
-	usb_h_cb_roothub_t rh_cb;
-#if CONF_USB_H_INST_OWNER_SP
-	/** Extension for the driver owner (upper layer user) */
-	void *owner;
-#endif
-};
-
-/**
- * @brief      Transfer descriptor for control transfer
- *
- * Timing in USB 2.0 spec.:
- * - 9.2.6.1 : USB sets an upper limit of 5 seconds as the upper limit for any
- *             command to be processed.
- * - 9.2.6.3 : if a device receives a SetAddress() request, the device must be
- *             able to complete processing of the request and be able to
- *             successfully complete the Status stage of the request within
- *             50 ms.
- *             After successful completion of the Status stage, the device is
- *             allowed a SetAddress() recovery interval of 2 ms. At the end of
- *             this interval, the device must be able to accept Setup packets
- *             addressed to the new address.
- * - 9.2.6.4 : For standard device requests that require no Data stage, a device
- *             must be able to complete the request and be able to successfully
- *             complete the Status stage of the request within 50 ms of receipt
- *             of the request. This limitation applies to requests to the
- *             device, interface, or endpoint.
- *             For standard device requests that require data stage transfer to
- *             the host, the device must be able to return the first data packet
- *             to the host within 500 ms of receipt of the request. For
- *             subsequent data packets, if any, the device must be able to
- *             return them within 500 ms of successful completion of the
- *             transmission of the previous packet. The device must then be
- *             able to successfully complete the status stage within 50 ms after
- *             returning the last data packet.
- *             For standard device requests that require a data stage transfer
- *             to the device, the 5-second limit applies.
- * - 9.2.6.5 : Unless specifically exempted in the class document, all
- *             class-specific requests must meet the timing limitations for
- *             standard device requests.
- *
- * Conclusion:
- * 1. Whole request with data: 5 seconds
- * 2. Whole request without data: 50 ms
- * 3. Data packets: 500 ms
- */
-struct usb_h_ctrl_xfer {
-	/** Pointer to transfer data */
-	uint8_t *data;
-	/** Pointer to setup packet */
-	uint8_t *setup;
-	/** Expected transfer size */
-	uint16_t size;
-	/** Transfer count */
-	uint16_t count;
-	/** Timeout for request, -1 if disable timeout */
-	int16_t req_timeout;
-	/** Timeout between packets
-	 *  (500ms for data and 50ms for status), -1 if disabled */
-	int16_t pkt_timeout;
-	/** Packet size during transfer (<= allocate max packet size) */
-	uint16_t pkt_size;
-
-	/** Transfer state */
-	uint8_t state;
-	/** Last transfer status */
-	int8_t status;
-};
-
-/**
- * @brief      Transfer descriptor for bulk / interrupt / iso transfer
- */
-struct usb_h_bulk_int_iso_xfer {
-	/** Expected transfer size */
-	uint32_t size;
-	/** Transfer count */
-	uint32_t count;
-	/** Pointer to transfer data */
-	uint8_t *data;
-	/** Reserved */
-	uint16_t reserved[3];
-
-	/** Transfer state */
-	uint8_t state;
-	/** Last transfer status */
-	int8_t status;
-};
-
-/**
- * @brief      Transfer descriptor for periodic high bandwidth transfer
- */
-struct usb_h_high_bw_xfer {
-	/** Expected transfer size */
-	uint32_t size;
-	/** Transfer count */
-	uint32_t count;
-	/** Pointer to transfer data */
-	uint8_t *data;
-	/** Micro frame packet sizes */
-	uint16_t pkt_size[3];
-
-	/** Transfer state */
-	uint8_t state;
-	/** Last transfer status */
-	int8_t status;
-};
-
-/**
- * @brief General transfer descriptor
- */
-struct usb_h_xfer {
-	/** Reserved for different transfer */
-	union {
-		uint16_t u16[9];
-		uint8_t  u8[18];
-	} reserved;
-	/** Transfer state */
-	uint8_t state;
-	/** Last transfer status */
-	int8_t status;
-};
-
-/**
- * @brief      USB Host Controller Driver Pipe structure
- */
-struct usb_h_pipe {
-	/** Pointer to the USB Host Controller Driver */
-	struct usb_h_desc *hcd;
-	/** Pointer to the callback for transfer done */
-	usb_h_pipe_cb_xfer_t done;
-#if CONF_USB_H_INST_OWNER_SP
-	/** Pointer to the pipe owner */
-	void *owner;
-#endif
-
-	/** Endpoint max packet size (bits 10..0) */
-	uint16_t max_pkt_size;
-	/** Device address */
-	uint8_t dev;
-	/** Endpoint address */
-	uint8_t ep;
-
-	/** Endpoint interval */
-	uint8_t interval;
-	/** Endpoint type: Control, Isochronous, Bulk or Interrupt */
-	uint8_t type;
-	/** Current toggle (driver dependent) */
-	uint8_t toggle;
-	/** Endpoint number of banks (HW dependent) */
-	uint8_t bank : 2;
-	/** Transfer speed (HW dependent) */
-	uint8_t speed : 2;
-	/** High bandwidth periodic out */
-	uint8_t high_bw_out : 1;
-	/** Uses DMA (on transfer) */
-	uint8_t dma : 1;
-	/** Transfer ZLP support */
-	uint8_t zlp : 1;
-	/** Transfer periodic */
-	uint8_t periodic_start : 1;
-
-	/** Transfer status */
-	union {
-		/** General transfer info */
-		struct usb_h_xfer general;
-		/** Control transfer status */
-		struct usb_h_ctrl_xfer ctrl;
-		/** Bulk interrupt iso transfer status */
-		struct usb_h_bulk_int_iso_xfer bii;
-		/** Periodic high bandwidth transfer status */
-		struct usb_h_high_bw_xfer hbw;
-	} x;
-};
-
-/**
- * @brief      USB HCD Initialization
- *
- * @param      drv     Pointer to the HCD driver instance
- * @param[in]  hw      Pointer to hardware base
- * @param[in]  prvt    The private driver data (implement specific)
- *
- * @return     Operation result status
- * @retval     ERR_DENIED Hardware has been enabled
- * @retval     ERR_NONE Operation done successfully
- */
-int32_t _usb_h_init(struct usb_h_desc *drv, void *hw, void *prvt);
-
-/**
- * @brief      USB HCD de-initialization
- *
- * @param      drv   The driver
- */
-void _usb_h_deinit(struct usb_h_desc *drv);
-
-/**
- * @brief      USB HCD enable
- *
- * @param      drv   The driver
- */
-void _usb_h_enable(struct usb_h_desc *drv);
-
-/**
- * @brief      USB HCD disable
- *
- * @param      drv   The driver
- */
-void _usb_h_disable(struct usb_h_desc *drv);
-
-/**
- * @brief      Register callbacks for USB HCD
- *
- * @param      drv   The driver
- * @param[in]  type  The callback type
- * @param[in]  cb    The callback function entry
- *
- * @return     Operation result status
- * @retval     ERR_INVALID_ARG Argument error
- * @retval     ERR_NONE Operation done successfully
- */
-int32_t _usb_h_register_callback(struct usb_h_desc *drv, enum usb_h_cb_type type, FUNC_PTR cb);
-
-/**
- * @brief      Return current frame number
- *
- * @param      drv   The driver
- *
- * @return     current frame number
- */
-uint16_t _usb_h_get_frame_n(struct usb_h_desc *drv);
-
-/**
- * @brief      Return current micro frame number
- *
- * @param      drv   The driver
- *
- * @return     current micro frame number
- */
-uint8_t _usb_h_get_microframe_n(struct usb_h_desc *drv);
-
-/**
- * @brief Suspend the USB bus
- *
- * @param drv The driver
- */
-void _usb_h_suspend(struct usb_h_desc *drv);
-
-/**
- * @brief Resume the USB bus
- *
- * @param drv The driver
- */
-void _usb_h_resume(struct usb_h_desc *drv);
-
-/* Root hub related APIs */
-
-/**
- * \brief Reset the root hub port
- *
- * \param[in,out] drv  Pointer to the USB HCD driver
- * \param[in]     port Root hub port, ignored if there is only one port
- */
-void _usb_h_rh_reset(struct usb_h_desc *drv, uint8_t port);
-
-/**
- * \brief Suspend the root hub port
- *
- * \param[in,out] drv  Pointer to the USB HCD driver
- * \param[in]     port Root hub port, ignored if there is only one port
- */
-void _usb_h_rh_suspend(struct usb_h_desc *drv, uint8_t port);
-
-/**
- * \brief Resume the root hub port
- *
- * \param[in,out] drv  Pointer to the USB HCD driver
- * \param[in]     port Root hub port, ignored if there is only one port
- */
-void _usb_h_rh_resume(struct usb_h_desc *drv, uint8_t port);
-
-/**
- * \brief Root hub or port feature status check
- *
- * Check USB Spec. for hub status and feature selectors.
- *
- * \param[in] drv  Pointer to the USB HCD driver
- * \param[in] port Set to 0 to get hub status, otherwise to get port status
- * \param[in] ftr  Hub feature/status selector
- *                 (0: connection, 2: suspend, 4: reset, 9: LS, 10: HS)
- *
- * \return     \c true if the status bit is 1
- */
-bool _usb_h_rh_check_status(struct usb_h_desc *drv, uint8_t port, uint8_t ftr);
-
-/* Pipe transfer functions */
-
-/**
- * @brief      Allocate a pipe for USB host communication
- *
- * @param      drv           The USB HCD driver
- * @param[in]  dev           The device address
- * @param[in]  ep            The endpoint address
- * @param[in]  max_pkt_size  The endpoint maximum packet size
- * @param[in]  attr          The endpoint attribute
- * @param[in]  interval      The endpoint interval
- *                           (bInterval of USB Endpoint Descriptor)
- * @param[in]  speed         The transfer speed of the endpoint
- * @param[in]  minimum_rsc   Minimum the resource usage, \sa usb_h_rsc_strategy
- *
- * @return     Pointer to allocated pipe structure instance
- * @retval     NULL allocation fail
- */
-struct usb_h_pipe *_usb_h_pipe_allocate(struct usb_h_desc *drv, uint8_t dev, uint8_t ep, uint16_t max_pkt_size,
-                                        uint8_t attr, uint8_t interval, uint8_t speed, bool minimum_rsc);
-
-/**
- * @brief      Free an allocated pipe
- *
- * @param      pipe  The pipe
- *
- * @return     Operation result status
- * @retval     ERR_BUSY Pipe is busy, use \ref _usb_h_pipe_abort to abort
- * @retval     ERR_NONE Operation done successfully
- */
-int32_t _usb_h_pipe_free(struct usb_h_pipe *pipe);
-
-/**
- * @brief      Modify parameters of an allocated control pipe
- *
- * @param      pipe          The pipe
- * @param[in]  dev           The device address
- * @param[in]  ep            The endpoint address
- * @param[in]  max_pkt_size  The maximum packet size, must be equal or
- *                           less than allocated size
- * @param[in]  speed         The working speed
- *
- * @return     Operation result status
- * @retval     ERR_NOT_INITIALIZED Pipe is not allocated
- * @retval     ERR_BUSY Pipe is busy transferring
- * @retval     ERR_INVALID_ARG Argument error
- * @retval     ERR_UNSUPPORTED_OP Pipe is not control pipe
- * @retval     ERR_NONE Operation done successfully
- */
-int32_t _usb_h_pipe_set_control_param(struct usb_h_pipe *pipe, uint8_t dev, uint8_t ep, uint16_t max_pkt_size,
-                                      uint8_t speed);
-
-/**
- * @brief      Register transfer callback on a pipe
- *
- * @param      pipe  The pipe
- * @param[in]  cb    Transfer callback function
- *
- * @return     Operation result status
- * @retval     ERR_INVALID_ARG Argument error
- * @retval     ERR_NONE Operation done successfully
- */
-int32_t _usb_h_pipe_register_callback(struct usb_h_pipe *pipe, usb_h_pipe_cb_xfer_t cb);
-
-/**
- * @brief      Issue a control transfer (request) on a pipe
- *
- * \note When there is data stage, timeout between data packets is 500ms, the
- *       timeout between last data packet and the status packet is 50ms.
- *
- * @param         pipe    The pipe
- * @param[in]     setup   Pointer to the setup packet
- * @param[in,out] data    Pointer to the data buffer
- * @param[in]     length  The data length
- * @param[in]     timeout Timeout for whole request in ms
- *
- * @return     Operation result status
- * @retval     ERR_NOT_INITIALIZED Pipe is not allocated
- * @retval     ERR_BUSY Pipe is busy transferring
- * @retval     ERR_INVALID_ARG Argument error
- * @retval     ERR_UNSUPPORTED_OP Pipe is not control pipe
- * @retval     ERR_NONE Operation done successfully
- */
-int32_t _usb_h_control_xfer(struct usb_h_pipe *pipe, uint8_t *setup, uint8_t *data, uint16_t length, int16_t timeout);
-
-/**
- * @brief      Issue a bulk / interrupt / iso transfer on a pipe
- *
- * @param         pipe     The pipe
- * @param[in,out] data     Pointer to the data buffer
- * @param[in]     length   The data length
- * @param[in]     auto_zlp Auto append ZLP for OUT
- *
- * @return     Operation result status
- * @retval     ERR_NOT_INITIALIZED Pipe is not allocated
- * @retval     ERR_BUSY Pipe is busy transferring
- * @retval     ERR_INVALID_ARG Argument error
- * @retval     ERR_UNSUPPORTED_OP Pipe is control pipe
- * @retval     ERR_NONE Operation done successfully
- */
-int32_t _usb_h_bulk_int_iso_xfer(struct usb_h_pipe *pipe, uint8_t *data, uint32_t length, bool auto_zlp);
-
-/**
- * @brief      Issue a periodic high bandwidth output on a pipe
- *
- * @param         pipe             The pipe
- * @param[in,out] data             Pointer to the data buffer
- * @param[in]     length           The data length
- * @param[in]     trans_pkt_size   The transaction packet sizes in a micro frame,
- *                                 0 to use endpoint max packet size
- *
- * @return     Operation result status
- * @retval     ERR_NOT_INITIALIZED Pipe is not allocated
- * @retval     ERR_BUSY Pipe is busy transferring
- * @retval     ERR_INVALID_ARG Argument error
- * @retval     ERR_UNSUPPORTED_OP Pipe is not high bandwidth periodic pipe, or
- *                                DMA feature not enabled, or
- *                                high bandwidth not enabled
- * @retval     ERR_NONE Operation done successfully
- */
-int32_t _usb_h_high_bw_out(struct usb_h_pipe *pipe, uint8_t *data, uint32_t length, uint16_t trans_pkt_size[3]);
-
-/**
- * @brief      Check if pipe is busy transferring
- *
- * @param      pipe  The pipe
- *
- * @return     \c true if pipe is busy
- */
-bool _usb_h_pipe_is_busy(struct usb_h_pipe *pipe);
-
-/**
- * @brief      Abort pending transfer on a pipe
- *
- * @param      pipe  The pipe
- */
-void _usb_h_pipe_abort(struct usb_h_pipe *pipe);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HPL_USB_HOST_H_INCLUDED */
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_user_area.h b/atmel-samd/asf4/samd21/hal/include/hpl_user_area.h
deleted file mode 100644
index b5c419bff..000000000
--- a/atmel-samd/asf4/samd21/hal/include/hpl_user_area.h
+++ /dev/null
@@ -1,133 +0,0 @@
-/**
- * \file
- *
- * \brief Special user data area access
- *
- * Copyright (C) 2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- *    from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- *    Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
-
-#ifndef _HPL_USER_DATA_H_INCLUDED
-#define _HPL_USER_DATA_H_INCLUDED
-
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief Read data from user data area
- *
- * The user data area could be the area that stores user data that is not erased
- * with the flash contents, e.g.,
- * - NVM Software Calibration Area of SAM D/L/C family
- * - User Signature of SAM E/S/V 70
- *
- * \param[in]  base   The base address of the user area
- * \param[in]  offset The byte offset of the data to be read inside the area
- * \param[out] buf    Pointer to buffer to place the read data
- * \param[in]  size   Size of data in number of bytes
- *
- * \return Operation status or bytes read.
- * \retval ERR_NONE Data read successfully
- * \retval ERR_UNSUPPORTED_OP base address not in any supported user area
- * \retval ERR_BAD_ADDRESS offset not in right area
- * \retval ERR_INVALID_ARG offset and size exceeds the right area
- */
-int32_t _user_area_read(const void *base, const uint32_t offset, uint8_t *buf, const uint32_t size);
-
-/**
- * \brief Read no more than 32 bits data from user data area
- *
- * When reading bits, the bitfield can cross 32-bis boundaries.
- *
- * \param[in] base       The base address of the user area
- * \param[in] bit_offset Offset in number of bits
- * \param[in] n_bits     Number of bits to read
- * \return data read, assert if anything wrong (address not in user area
- *         offset, size error, etc.).
- */
-uint32_t _user_area_read_bits(const void *base, const uint32_t bit_offset, const uint8_t n_bits);
-
-/**
- * \brief Write data to user data area
- *
- * The user data area could be the area that stores user data that is not erased
- * with the flash contents, e.g.,
- * - NVM Software Calibration Area of SAM D/L/C family
- * - User Signature of SAM E/S/V 70
- *
- * When assigned offset and size exceeds the data area, error is reported.
- *
- * \param[out] base  The base address of the user area
- * \param[in]  offset The offset of the data to be written inside the area
- * \param[in]  buf    Pointer to buffer to place the written data
- * \param[in]  size   Size of data in number of bytes
- *
- * \return Operation status or bytes writting.
- * \retval ERR_NONE Data written successfully
- * \retval ERR_UNSUPPORTED_OP base address not in any supported user area
- * \retval ERR_DENIED Security bit is set
- * \retval ERR_BAD_ADDRESS offset not in right area
- * \retval ERR_INVALID_ARG offset and size exceeds the right area
- */
-int32_t _user_area_write(void *base, const uint32_t offset, const uint8_t *buf, const uint32_t size);
-
-/**
- * \brief Write no more than 32 bits data to user data area
- *
- * When writting bits, the bitfield can cross 32-bis boundaries.
- *
- * \param[out] base       The base address of the user area
- * \param[in]  bit_offset Offset in number of bits
- * \param[in]  bits       The data content
- * \param[in]  n_bits     Number of bits to write
- * \return Operation result
- * \retval ERR_NONE Data written successfully
- * \retval ERR_UNSUPPORTED_OP base address not in any supported user area
- * \retval ERR_DENIED Security bit is set
- * \retval ERR_BAD_ADDRESS offset not in right area
- * \retval ERR_INVALID_ARG offset and size exceeds the right area
- */
-int32_t _user_area_write_bits(void *base, const uint32_t bit_offset, const uint32_t bits, const uint8_t n_bits);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _HPL_USER_DATA_H_INCLUDED */