271 lines
7.8 KiB
C
271 lines
7.8 KiB
C
/**
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* \file
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*
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* \brief USART related functionality declaration.
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*
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* Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Subject to your compliance with these terms, you may use Microchip
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* software and any derivatives exclusively with Microchip products.
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* It is your responsibility to comply with third party license terms applicable
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* to your use of third party software (including open source software) that
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* may accompany Microchip software.
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*
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* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
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* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
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* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
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* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
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* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
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* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
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* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
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* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
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* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
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* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
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* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
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*
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* \asf_license_stop
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*
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*/
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#ifndef _HPL_USART_ASYNC_H_INCLUDED
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#define _HPL_USART_ASYNC_H_INCLUDED
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/**
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* \addtogroup HPL USART
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*
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* \section hpl_usart_rev Revision History
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* - v1.0.0 Initial Release
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*
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*@{
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*/
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#include "hpl_usart.h"
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#include "hpl_irq.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief USART callback types
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*/
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enum _usart_async_callback_type { USART_ASYNC_BYTE_SENT, USART_ASYNC_RX_DONE, USART_ASYNC_TX_DONE, USART_ASYNC_ERROR };
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/**
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* \brief USART device structure
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*
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* The USART device structure forward declaration.
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*/
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struct _usart_async_device;
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/**
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* \brief USART interrupt callbacks
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*/
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struct _usart_async_callbacks {
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void (*tx_byte_sent)(struct _usart_async_device *device);
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void (*rx_done_cb)(struct _usart_async_device *device, uint8_t data);
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void (*tx_done_cb)(struct _usart_async_device *device);
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void (*error_cb)(struct _usart_async_device *device);
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};
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/**
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* \brief USART descriptor device structure
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*/
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struct _usart_async_device {
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struct _usart_async_callbacks usart_cb;
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struct _irq_descriptor irq;
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void * hw;
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};
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/**
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* \name HPL functions
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*/
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//@{
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/**
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* \brief Initialize asynchronous USART
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*
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* This function does low level USART configuration.
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*
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* \param[in] device The pointer to USART device instance
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* \param[in] hw The pointer to hardware instance
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*
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* \return Initialization status
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*/
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int32_t _usart_async_init(struct _usart_async_device *const device, void *const hw);
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/**
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* \brief Deinitialize USART
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*
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* This function closes the given USART by disabling its clock.
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*
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* \param[in] device The pointer to USART device instance
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*/
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void _usart_async_deinit(struct _usart_async_device *const device);
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/**
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* \brief Enable usart module
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*
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* This function will enable the usart module
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*
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* \param[in] device The pointer to USART device instance
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*/
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void _usart_async_enable(struct _usart_async_device *const device);
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/**
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* \brief Disable usart module
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*
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* This function will disable the usart module
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*
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* \param[in] device The pointer to USART device instance
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*/
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void _usart_async_disable(struct _usart_async_device *const device);
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/**
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* \brief Calculate baud rate register value
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*
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* \param[in] baud Required baud rate
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* \param[in] clock_rate clock frequency
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* \param[in] samples The number of samples
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* \param[in] mode USART mode
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* \param[in] fraction A fraction value
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*
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* \return Calculated baud rate register value
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*/
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uint16_t _usart_async_calculate_baud_rate(const uint32_t baud, const uint32_t clock_rate, const uint8_t samples,
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const enum usart_baud_rate_mode mode, const uint8_t fraction);
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/**
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* \brief Set baud rate
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*
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* \param[in] device The pointer to USART device instance
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* \param[in] baud_rate A baud rate to set
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*/
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void _usart_async_set_baud_rate(struct _usart_async_device *const device, const uint32_t baud_rate);
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/**
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* \brief Set data order
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*
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* \param[in] device The pointer to USART device instance
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* \param[in] order A data order to set
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*/
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void _usart_async_set_data_order(struct _usart_async_device *const device, const enum usart_data_order order);
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/**
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* \brief Set mode
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*
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* \param[in] device The pointer to USART device instance
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* \param[in] mode A mode to set
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*/
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void _usart_async_set_mode(struct _usart_async_device *const device, const enum usart_mode mode);
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/**
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* \brief Set parity
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*
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* \param[in] device The pointer to USART device instance
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* \param[in] parity A parity to set
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*/
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void _usart_async_set_parity(struct _usart_async_device *const device, const enum usart_parity parity);
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/**
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* \brief Set stop bits mode
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*
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* \param[in] device The pointer to USART device instance
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* \param[in] stop_bits A stop bits mode to set
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*/
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void _usart_async_set_stop_bits(struct _usart_async_device *const device, const enum usart_stop_bits stop_bits);
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/**
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* \brief Set character size
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*
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* \param[in] device The pointer to USART device instance
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* \param[in] size A character size to set
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*/
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void _usart_async_set_character_size(struct _usart_async_device *const device, const enum usart_character_size size);
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/**
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* \brief Retrieve usart status
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*
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* \param[in] device The pointer to USART device instance
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*/
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uint32_t _usart_async_get_status(const struct _usart_async_device *const device);
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/**
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* \brief Write a byte to the given USART instance
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*
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* \param[in] device The pointer to USART device instance
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* \param[in] data Data to write
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*/
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void _usart_async_write_byte(struct _usart_async_device *const device, uint8_t data);
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/**
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* \brief Check if USART is ready to send next byte
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*
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* \param[in] device The pointer to USART device instance
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*
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* \return Status of the ready check.
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* \retval true if the USART is ready to send next byte
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* \retval false if the USART is not ready to send next byte
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*/
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bool _usart_async_is_byte_sent(const struct _usart_async_device *const device);
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/**
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* \brief Set the state of flow control pins
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*
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* \param[in] device The pointer to USART device instance
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* \param[in] state - A state of flow control pins to set
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*/
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void _usart_async_set_flow_control_state(struct _usart_async_device *const device,
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const union usart_flow_control_state state);
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/**
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* \brief Retrieve the state of flow control pins
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*
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* This function retrieves the of flow control pins.
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*
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* \return USART_FLOW_CONTROL_STATE_UNAVAILABLE.
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*/
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union usart_flow_control_state _usart_async_get_flow_control_state(const struct _usart_async_device *const device);
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/**
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* \brief Enable data register empty interrupt
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*
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* \param[in] device The pointer to USART device instance
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*/
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void _usart_async_enable_byte_sent_irq(struct _usart_async_device *const device);
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/**
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* \brief Enable transmission complete interrupt
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*
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* \param[in] device The pointer to USART device instance
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*/
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void _usart_async_enable_tx_done_irq(struct _usart_async_device *const device);
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/**
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* \brief Retrieve ordinal number of the given USART hardware instance
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*
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* \param[in] device The pointer to USART device instance
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*
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* \return The ordinal number of the given USART hardware instance
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*/
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uint8_t _usart_async_get_hardware_index(const struct _usart_async_device *const device);
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/**
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* \brief Enable/disable USART interrupt
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*
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* param[in] device The pointer to USART device instance
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* param[in] type The type of interrupt to disable/enable if applicable
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* param[in] state Enable or disable
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*/
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void _usart_async_set_irq_state(struct _usart_async_device *const device, const enum _usart_async_callback_type type,
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const bool state);
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//@}
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#ifdef __cplusplus
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}
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#endif
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/**@}*/
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#endif /* _HPL_USART_ASYNC_H_INCLUDED */
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