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