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Diffstat (limited to 'watch-library/hal/include/hpl_usart_async.h')
| -rw-r--r-- | watch-library/hal/include/hpl_usart_async.h | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/watch-library/hal/include/hpl_usart_async.h b/watch-library/hal/include/hpl_usart_async.h new file mode 100644 index 00000000..3f833d1a --- /dev/null +++ b/watch-library/hal/include/hpl_usart_async.h @@ -0,0 +1,270 @@ +/** + * \file + * + * \brief USART related functionality declaration. + * + * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries. + * + * \asf_license_start + * + * \page License + * + * Subject to your compliance with these terms, you may use Microchip + * software and any derivatives exclusively with Microchip products. + * It is your responsibility to comply with third party license terms applicable + * to your use of third party software (including open source software) that + * may accompany Microchip software. + * + * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, + * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, + * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, + * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE + * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL + * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE + * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE + * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT + * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY + * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, + * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. + * + * \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 */ |