108 lines
2.8 KiB
C
108 lines
2.8 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_LPI2C_FREERTOS_H__
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#define __FSL_LPI2C_FREERTOS_H__
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#include "FreeRTOS.h"
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#include "portable.h"
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#include "semphr.h"
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#include "fsl_lpi2c.h"
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/*!
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* @addtogroup lpi2c_freertos_driver LPI2C 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 LPI2C FreeRTOS driver version. */
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#define FSL_LPI2C_FREERTOS_DRIVER_VERSION (MAKE_VERSION(2, 3, 0))
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/*@}*/
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/*!
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* @cond RTOS_PRIVATE
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* @brief LPI2C FreeRTOS handle
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*/
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typedef struct _lpi2c_rtos_handle
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{
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LPI2C_Type *base; /*!< LPI2C base address */
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lpi2c_master_handle_t drv_handle; /*!< Handle of the underlying driver, treated as opaque by the RTOS layer */
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status_t async_status;
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SemaphoreHandle_t mutex; /*!< Mutex to lock the handle during a trasfer */
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SemaphoreHandle_t semaphore; /*!< Semaphore to notify and unblock task when transfer ends */
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} lpi2c_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 LPI2C RTOS Operation
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* @{
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*/
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/*!
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* @brief Initializes LPI2C.
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*
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* This function initializes the LPI2C module and related RTOS context.
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*
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* @param handle The RTOS LPI2C handle, the pointer to an allocated space for RTOS context.
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* @param base The pointer base address of the LPI2C instance to initialize.
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* @param masterConfig Configuration structure to set-up LPI2C in master mode.
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* @param srcClock_Hz Frequency of input clock of the LPI2C module.
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* @return status of the operation.
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*/
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status_t LPI2C_RTOS_Init(lpi2c_rtos_handle_t *handle,
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LPI2C_Type *base,
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const lpi2c_master_config_t *masterConfig,
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uint32_t srcClock_Hz);
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/*!
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* @brief Deinitializes the LPI2C.
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*
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* This function deinitializes the LPI2C module and related RTOS context.
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*
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* @param handle The RTOS LPI2C handle.
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*/
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status_t LPI2C_RTOS_Deinit(lpi2c_rtos_handle_t *handle);
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/*!
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* @brief Performs I2C transfer.
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*
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* This function performs an I2C transfer using LPI2C module according to data given in the transfer structure.
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*
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* @param handle The RTOS LPI2C handle.
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* @param transfer Structure specifying the transfer parameters.
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* @return status of the operation.
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*/
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status_t LPI2C_RTOS_Transfer(lpi2c_rtos_handle_t *handle, lpi2c_master_transfer_t *transfer);
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/*!
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* @}
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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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* @}
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*/
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#endif /* __FSL_LPI2C_FREERTOS_H__ */
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