| /** |
| ****************************************************************************** |
| * @file stm32f3xx_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>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. Neither the name of STMicroelectronics nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| ****************************************************************************** |
| */ |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "stm32f3xx_hal.h" |
| |
| /** @addtogroup STM32F3xx_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 4 |
| /** |
| * @} |
| */ |
| |
| /* 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****/ |