Diff: Src/stm32l4xx_hal_spi_ex.c

Revision:

0:80ee8f3b695e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Src/stm32l4xx_hal_spi_ex.c	Mon Nov 02 19:37:23 2015 +0000
@@ -0,0 +1,134 @@
+/**
+  ******************************************************************************
+  * @file    stm32l4xx_hal_spi_ex.c
+  * @author  MCD Application Team
+  * @version V1.1.0
+  * @date    16-September-2015
+  * @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) 2015 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 "stm32l4xx_hal.h"
+
+/** @addtogroup STM32L4xx_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 = 0;
+  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****/
+