156 lines
5.3 KiB
C
156 lines
5.3 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2020 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __FSL_LPUART_RTOS_H__
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#define __FSL_LPUART_RTOS_H__
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#include "fsl_lpuart.h"
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#include <FreeRTOS.h>
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#include <event_groups.h>
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#include <semphr.h>
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/*!
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* @addtogroup lpuart_freertos_driver
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* @{
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*/
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/*! @name Driver version */
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/*@{*/
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/*! @brief LPUART FreeRTOS driver version. */
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#define FSL_LPUART_FREERTOS_DRIVER_VERSION (MAKE_VERSION(2, 5, 0))
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/*@}*/
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/*! @brief LPUART RTOS configuration structure. */
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typedef struct _lpuart_rtos_config
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{
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LPUART_Type *base; /*!< UART base address */
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uint32_t srcclk; /*!< UART source clock in Hz*/
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uint32_t baudrate; /*!< Desired communication speed */
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lpuart_parity_mode_t parity; /*!< Parity setting */
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lpuart_stop_bit_count_t stopbits; /*!< Number of stop bits to use */
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uint8_t *buffer; /*!< Buffer for background reception */
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uint32_t buffer_size; /*!< Size of buffer for background reception */
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#if defined(FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT) && FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT
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bool enableRxRTS; /*!< RX RTS enable */
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bool enableTxCTS; /*!< TX CTS enable */
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lpuart_transmit_cts_source_t txCtsSource; /*!< TX CTS source */
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lpuart_transmit_cts_config_t txCtsConfig; /*!< TX CTS configure */
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#endif
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} lpuart_rtos_config_t;
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/*!
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* @cond RTOS_PRIVATE
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* @name LPUART event flags
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*
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* This are only valid states for txEvent and rxEvent (lpuart_rtos_handle_t).
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*/
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/*@{*/
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/*! @brief Event flag - transfer complete. */
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#define RTOS_LPUART_COMPLETE 0x1U
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/*! @brief Event flag - ring buffer overrun. */
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#define RTOS_LPUART_RING_BUFFER_OVERRUN 0x2U
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/*! @brief Event flag - hardware buffer overrun. */
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#define RTOS_LPUART_HARDWARE_BUFFER_OVERRUN 0x4U
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/*@}*/
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/*! @brief LPUART FreeRTOS transfer structure. */
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typedef struct _lpuart_rtos_handle
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{
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LPUART_Type *base; /*!< UART base address */
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lpuart_transfer_t txTransfer; /*!< TX transfer structure */
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lpuart_transfer_t rxTransfer; /*!< RX transfer structure */
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SemaphoreHandle_t rxSemaphore; /*!< RX semaphore for resource sharing */
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SemaphoreHandle_t txSemaphore; /*!< TX semaphore for resource sharing */
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EventGroupHandle_t rxEvent; /*!< RX completion event */
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EventGroupHandle_t txEvent; /*!< TX completion event */
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void *t_state; /*!< Transactional state of the underlying driver */
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#if (configSUPPORT_STATIC_ALLOCATION == 1)
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StaticSemaphore_t txSemaphoreBuffer; /*!< Statically allocated memory for txSemaphore */
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StaticSemaphore_t rxSemaphoreBuffer; /*!< Statically allocated memory for rxSemaphore */
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StaticEventGroup_t txEventBuffer; /*!< Statically allocated memory for txEvent */
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StaticEventGroup_t rxEventBuffer; /*!< Statically allocated memory for rxEvent */
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#endif
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} lpuart_rtos_handle_t;
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/*! \endcond */
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/*******************************************************************************
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* API
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******************************************************************************/
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/*!
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* @name LPUART RTOS Operation
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* @{
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*/
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/*!
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* @brief Initializes an LPUART instance for operation in RTOS.
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*
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* @param handle The RTOS LPUART handle, the pointer to an allocated space for RTOS context.
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* @param t_handle The pointer to an allocated space to store the transactional layer internal state.
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* @param cfg The pointer to the parameters required to configure the LPUART after initialization.
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* @return 0 succeed, others failed
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*/
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int LPUART_RTOS_Init(lpuart_rtos_handle_t *handle, lpuart_handle_t *t_handle, const lpuart_rtos_config_t *cfg);
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/*!
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* @brief Deinitializes an LPUART instance for operation.
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*
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* This function deinitializes the LPUART module, sets all register value to the reset value,
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* and releases the resources.
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*
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* @param handle The RTOS LPUART handle.
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*/
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int LPUART_RTOS_Deinit(lpuart_rtos_handle_t *handle);
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/*!
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* @name LPUART transactional Operation
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* @{
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*/
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/*!
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* @brief Sends data in the background.
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*
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* This function sends data. It is an synchronous API.
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* If the hardware buffer is full, the task is in the blocked state.
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*
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* @param handle The RTOS LPUART handle.
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* @param buffer The pointer to buffer to send.
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* @param length The number of bytes to send.
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*/
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int LPUART_RTOS_Send(lpuart_rtos_handle_t *handle, uint8_t *buffer, uint32_t length);
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/*!
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* @brief Receives data.
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*
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* This function receives data from LPUART. It is an synchronous API. If any data is immediately available
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* it is returned immediately and the number of bytes received.
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*
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* @param handle The RTOS LPUART handle.
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* @param buffer The pointer to buffer where to write received data.
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* @param length The number of bytes to receive.
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* @param received The pointer to a variable of size_t where the number of received data is filled.
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*/
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int LPUART_RTOS_Receive(lpuart_rtos_handle_t *handle, uint8_t *buffer, uint32_t length, size_t *received);
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/* @} */
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#if defined(__cplusplus)
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}
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#endif
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/*! @}*/
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#endif /* __FSL_LPUART_RTOS_H__ */
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