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targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_spi_ex.c@636:b0d178e9fa10, 2016-07-07 (annotated)

Committer:
lzbpli
Date:
Thu Jul 07 06:48:59 2016 +0000
Revision:
636:b0d178e9fa10
Parent:
610:813dcc80987e 
l053

Who changed what in which revision?

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mbed_official 610:813dcc80987e 1 /**
mbed_official 610:813dcc80987e 2 ******************************************************************************
mbed_official 610:813dcc80987e 3 * @file stm32l4xx_hal_spi_ex.c
mbed_official 610:813dcc80987e 4 * @author MCD Application Team
mbed_official 610:813dcc80987e 5 * @version V1.0.0
mbed_official 610:813dcc80987e 6 * @date 26-June-2015
mbed_official 610:813dcc80987e 7 * @brief Extended SPI HAL module driver.
mbed_official 610:813dcc80987e 8 * This file provides firmware functions to manage the following
mbed_official 610:813dcc80987e 9 * SPI peripheral extended functionalities :
mbed_official 610:813dcc80987e 10 * + IO operation functions
mbed_official 610:813dcc80987e 11 *
mbed_official 610:813dcc80987e 12 ******************************************************************************
mbed_official 610:813dcc80987e 13 * @attention
mbed_official 610:813dcc80987e 14 *
mbed_official 610:813dcc80987e 15 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
mbed_official 610:813dcc80987e 16 *
mbed_official 610:813dcc80987e 17 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 610:813dcc80987e 18 * are permitted provided that the following conditions are met:
mbed_official 610:813dcc80987e 19 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 610:813dcc80987e 20 * this list of conditions and the following disclaimer.
mbed_official 610:813dcc80987e 21 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 610:813dcc80987e 22 * this list of conditions and the following disclaimer in the documentation
mbed_official 610:813dcc80987e 23 * and/or other materials provided with the distribution.
mbed_official 610:813dcc80987e 24 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 610:813dcc80987e 25 * may be used to endorse or promote products derived from this software
mbed_official 610:813dcc80987e 26 * without specific prior written permission.
mbed_official 610:813dcc80987e 27 *
mbed_official 610:813dcc80987e 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 610:813dcc80987e 29 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 610:813dcc80987e 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 610:813dcc80987e 31 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 610:813dcc80987e 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 610:813dcc80987e 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 610:813dcc80987e 34 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 610:813dcc80987e 35 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 610:813dcc80987e 36 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 610:813dcc80987e 37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 610:813dcc80987e 38 *
mbed_official 610:813dcc80987e 39 ******************************************************************************
mbed_official 610:813dcc80987e 40 */
mbed_official 610:813dcc80987e 41
mbed_official 610:813dcc80987e 42 /* Includes ------------------------------------------------------------------*/
mbed_official 610:813dcc80987e 43 #include "stm32l4xx_hal.h"
mbed_official 610:813dcc80987e 44
mbed_official 610:813dcc80987e 45 /** @addtogroup STM32L4xx_HAL_Driver
mbed_official 610:813dcc80987e 46 * @{
mbed_official 610:813dcc80987e 47 */
mbed_official 610:813dcc80987e 48
mbed_official 610:813dcc80987e 49 /** @defgroup SPIEx SPIEx
mbed_official 610:813dcc80987e 50 * @brief SPI Extended HAL module driver
mbed_official 610:813dcc80987e 51 * @{
mbed_official 610:813dcc80987e 52 */
mbed_official 610:813dcc80987e 53 #ifdef HAL_SPI_MODULE_ENABLED
mbed_official 610:813dcc80987e 54
mbed_official 610:813dcc80987e 55 /* Private typedef -----------------------------------------------------------*/
mbed_official 610:813dcc80987e 56 /* Private defines -----------------------------------------------------------*/
mbed_official 610:813dcc80987e 57 /** @defgroup SPIEx_Private_Constants SPIEx Private Constants
mbed_official 610:813dcc80987e 58 * @{
mbed_official 610:813dcc80987e 59 */
mbed_official 610:813dcc80987e 60 #define SPI_FIFO_SIZE 4
mbed_official 610:813dcc80987e 61 /**
mbed_official 610:813dcc80987e 62 * @}
mbed_official 610:813dcc80987e 63 */
mbed_official 610:813dcc80987e 64
mbed_official 610:813dcc80987e 65 /* Private macros ------------------------------------------------------------*/
mbed_official 610:813dcc80987e 66 /* Private variables ---------------------------------------------------------*/
mbed_official 610:813dcc80987e 67 /* Private function prototypes -----------------------------------------------*/
mbed_official 610:813dcc80987e 68 /* Exported functions ---------------------------------------------------------*/
mbed_official 610:813dcc80987e 69
mbed_official 610:813dcc80987e 70 /** @defgroup SPIEx_Exported_Functions SPIEx Exported Functions
mbed_official 610:813dcc80987e 71 * @{
mbed_official 610:813dcc80987e 72 */
mbed_official 610:813dcc80987e 73
mbed_official 610:813dcc80987e 74 /** @defgroup SPIEx_Exported_Functions_Group1 IO operation functions
mbed_official 610:813dcc80987e 75 * @brief Data transfers functions
mbed_official 610:813dcc80987e 76 *
mbed_official 610:813dcc80987e 77 @verbatim
mbed_official 610:813dcc80987e 78 ==============================================================================
mbed_official 610:813dcc80987e 79 ##### IO operation functions #####
mbed_official 610:813dcc80987e 80 ===============================================================================
mbed_official 610:813dcc80987e 81 [..]
mbed_official 610:813dcc80987e 82 This subsection provides a set of extended functions to manage the SPI
mbed_official 610:813dcc80987e 83 data transfers.
mbed_official 610:813dcc80987e 84
mbed_official 610:813dcc80987e 85 (#) Rx data flush function:
mbed_official 610:813dcc80987e 86 (++) HAL_SPIEx_FlushRxFifo()
mbed_official 610:813dcc80987e 87
mbed_official 610:813dcc80987e 88 @endverbatim
mbed_official 610:813dcc80987e 89 * @{
mbed_official 610:813dcc80987e 90 */
mbed_official 610:813dcc80987e 91
mbed_official 610:813dcc80987e 92 /**
mbed_official 610:813dcc80987e 93 * @brief Flush the RX fifo.
mbed_official 610:813dcc80987e 94 * @param hspi: pointer to a SPI_HandleTypeDef structure that contains
mbed_official 610:813dcc80987e 95 * the configuration information for the specified SPI module.
mbed_official 610:813dcc80987e 96 * @retval HAL status
mbed_official 610:813dcc80987e 97 */
mbed_official 610:813dcc80987e 98 HAL_StatusTypeDef HAL_SPIEx_FlushRxFifo(SPI_HandleTypeDef *hspi)
mbed_official 610:813dcc80987e 99 {
mbed_official 610:813dcc80987e 100 __IO uint32_t tmpreg;
mbed_official 610:813dcc80987e 101 uint8_t count = 0;
mbed_official 610:813dcc80987e 102 while((hspi->Instance->SR & SPI_FLAG_FRLVL) != SPI_FRLVL_EMPTY)
mbed_official 610:813dcc80987e 103 {
mbed_official 610:813dcc80987e 104 count++;
mbed_official 610:813dcc80987e 105 tmpreg = hspi->Instance->DR;
mbed_official 610:813dcc80987e 106 UNUSED(tmpreg); /* To avoid GCC warning */
mbed_official 610:813dcc80987e 107 if(count == SPI_FIFO_SIZE)
mbed_official 610:813dcc80987e 108 {
mbed_official 610:813dcc80987e 109 return HAL_TIMEOUT;
mbed_official 610:813dcc80987e 110 }
mbed_official 610:813dcc80987e 111 }
mbed_official 610:813dcc80987e 112 return HAL_OK;
mbed_official 610:813dcc80987e 113 }
mbed_official 610:813dcc80987e 114
mbed_official 610:813dcc80987e 115 /**
mbed_official 610:813dcc80987e 116 * @}
mbed_official 610:813dcc80987e 117 */
mbed_official 610:813dcc80987e 118
mbed_official 610:813dcc80987e 119 /**
mbed_official 610:813dcc80987e 120 * @}
mbed_official 610:813dcc80987e 121 */
mbed_official 610:813dcc80987e 122
mbed_official 610:813dcc80987e 123 #endif /* HAL_SPI_MODULE_ENABLED */
mbed_official 610:813dcc80987e 124
mbed_official 610:813dcc80987e 125 /**
mbed_official 610:813dcc80987e 126 * @}
mbed_official 610:813dcc80987e 127 */
mbed_official 610:813dcc80987e 128
mbed_official 610:813dcc80987e 129 /**
mbed_official 610:813dcc80987e 130 * @}
mbed_official 610:813dcc80987e 131 */
mbed_official 610:813dcc80987e 132
mbed_official 610:813dcc80987e 133 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/