Move to ASF4 and introduce SAMD51 support. (#258)3.0.0-alpha.0

* atmel-samd: Remove ASF3. This will break builds.

* atmel-samd: Add ASF4 for the SAMD21 and SAMD51.

* Introduce the supervisor concept to facilitate porting.

The supervisor is the code which runs individual MicroPython VMs. By
splitting it out we make it more consistent and easier to find.

This also adds very basic SAMD21 and SAMD51 support using the
supervisor. Only the REPL currently works.

This begins the work for #178.

1 files changed, 281 insertions, 0 deletions

diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_adc_sync.h b/atmel-samd/asf4/samd21/hal/include/hpl_adc_sync.h
new file mode 100644
index 000000000..84ab01ab3
--- /dev/null
+++ b/atmel-samd/asf4/samd21/hal/include/hpl_adc_sync.h
@@ -0,0 +1,281 @@
+/**
+ * \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 */