113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
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/**
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******************************************************************************
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* @file stm32f7xx_hal_spi_ex.c
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* @author MCD Application Team
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* @brief Extended SPI HAL module driver.
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* This file provides firmware functions to manage the following
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* SPI peripheral extended functionalities :
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* + IO operation functions
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*
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f7xx_hal.h"
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/** @addtogroup STM32F7xx_HAL_Driver
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* @{
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*/
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/** @defgroup SPIEx SPIEx
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* @brief SPI Extended HAL module driver
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* @{
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*/
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#ifdef HAL_SPI_MODULE_ENABLED
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/* Private typedef -----------------------------------------------------------*/
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/* Private defines -----------------------------------------------------------*/
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/** @defgroup SPIEx_Private_Constants SPIEx Private Constants
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* @{
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*/
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#define SPI_FIFO_SIZE 4UL
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/**
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* @}
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*/
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/* Private macros ------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @defgroup SPIEx_Exported_Functions SPIEx Exported Functions
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* @{
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*/
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/** @defgroup SPIEx_Exported_Functions_Group1 IO operation functions
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* @brief Data transfers functions
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*
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@verbatim
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==============================================================================
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##### IO operation functions #####
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===============================================================================
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[..]
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This subsection provides a set of extended functions to manage the SPI
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data transfers.
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(#) Rx data flush function:
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(++) HAL_SPIEx_FlushRxFifo()
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@endverbatim
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* @{
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*/
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/**
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* @brief Flush the RX fifo.
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* @param hspi pointer to a SPI_HandleTypeDef structure that contains
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* the configuration information for the specified SPI module.
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_SPIEx_FlushRxFifo(SPI_HandleTypeDef *hspi)
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{
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__IO uint32_t tmpreg;
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uint8_t count = 0U;
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while ((hspi->Instance->SR & SPI_FLAG_FRLVL) != SPI_FRLVL_EMPTY)
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{
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count++;
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tmpreg = hspi->Instance->DR;
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UNUSED(tmpreg); /* To avoid GCC warning */
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if (count == SPI_FIFO_SIZE)
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{
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return HAL_TIMEOUT;
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}
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}
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return HAL_OK;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* HAL_SPI_MODULE_ENABLED */
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/**
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* @}
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*/
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/**
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* @}
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*/
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