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Diffstat (limited to 'atmel-samd/asf4/samd21/hal/include/hpl_usart_async.h')
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1 files changed, 280 insertions, 0 deletions
diff --git a/atmel-samd/asf4/samd21/hal/include/hpl_usart_async.h b/atmel-samd/asf4/samd21/hal/include/hpl_usart_async.h new file mode 100644 index 000000000..1bcb3da44 --- /dev/null +++ b/atmel-samd/asf4/samd21/hal/include/hpl_usart_async.h @@ -0,0 +1,280 @@ +/** + * \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 */ |