text: /**
    ******************************************************************************
    * @file    stm32f0xx_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
    *
    * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
    * All rights reserved.</center></h2>
    *
    * This software component is licensed by ST under BSD 3-Clause license,
    * the "License"; You may not use this file except in compliance with the
    * License. You may obtain a copy of the License at:
    *                        opensource.org/licenses/BSD-3-Clause
    *
    ******************************************************************************
    */
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f0xx_hal.h"
  
  /** @addtogroup STM32F0xx_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 */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  