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| bfc108 | 1 | /** |
| Q | 2 | ****************************************************************************** |
| 3 | * @file stm32f0xx_hal_spi_ex.c | |
| 4 | * @author MCD Application Team | |
| 5 | * @brief Extended SPI HAL module driver. | |
| 6 | * This file provides firmware functions to manage the following | |
| 7 | * SPI peripheral extended functionalities : | |
| 8 | * + IO operation functions | |
| 9 | * | |
| 10 | ****************************************************************************** | |
| 11 | * @attention | |
| 12 | * | |
| 13 | * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> | |
| 14 | * | |
| 15 | * Redistribution and use in source and binary forms, with or without modification, | |
| 16 | * are permitted provided that the following conditions are met: | |
| 17 | * 1. Redistributions of source code must retain the above copyright notice, | |
| 18 | * this list of conditions and the following disclaimer. | |
| 19 | * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 20 | * this list of conditions and the following disclaimer in the documentation | |
| 21 | * and/or other materials provided with the distribution. | |
| 22 | * 3. Neither the name of STMicroelectronics nor the names of its contributors | |
| 23 | * may be used to endorse or promote products derived from this software | |
| 24 | * without specific prior written permission. | |
| 25 | * | |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 27 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 29 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 32 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
| 33 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
| 34 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 35 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 36 | * | |
| 37 | ****************************************************************************** | |
| 38 | */ | |
| 39 | ||
| 40 | /* Includes ------------------------------------------------------------------*/ | |
| 41 | #include "stm32f0xx_hal.h" | |
| 42 | ||
| 43 | /** @addtogroup STM32F0xx_HAL_Driver | |
| 44 | * @{ | |
| 45 | */ | |
| 46 | ||
| 47 | /** @defgroup SPIEx SPIEx | |
| 48 | * @brief SPI Extended HAL module driver | |
| 49 | * @{ | |
| 50 | */ | |
| 51 | #ifdef HAL_SPI_MODULE_ENABLED | |
| 52 | ||
| 53 | /* Private typedef -----------------------------------------------------------*/ | |
| 54 | /* Private defines -----------------------------------------------------------*/ | |
| 55 | /** @defgroup SPIEx_Private_Constants SPIEx Private Constants | |
| 56 | * @{ | |
| 57 | */ | |
| 58 | #define SPI_FIFO_SIZE 4 | |
| 59 | /** | |
| 60 | * @} | |
| 61 | */ | |
| 62 | ||
| 63 | /* Private macros ------------------------------------------------------------*/ | |
| 64 | /* Private variables ---------------------------------------------------------*/ | |
| 65 | /* Private function prototypes -----------------------------------------------*/ | |
| 66 | /* Exported functions ---------------------------------------------------------*/ | |
| 67 | ||
| 68 | /** @defgroup SPIEx_Exported_Functions SPIEx Exported Functions | |
| 69 | * @{ | |
| 70 | */ | |
| 71 | ||
| 72 | /** @defgroup SPIEx_Exported_Functions_Group1 IO operation functions | |
| 73 | * @brief Data transfers functions | |
| 74 | * | |
| 75 | @verbatim | |
| 76 | ============================================================================== | |
| 77 | ##### IO operation functions ##### | |
| 78 | =============================================================================== | |
| 79 | [..] | |
| 80 | This subsection provides a set of extended functions to manage the SPI | |
| 81 | data transfers. | |
| 82 | ||
| 83 | (#) Rx data flush function: | |
| 84 | (++) HAL_SPIEx_FlushRxFifo() | |
| 85 | ||
| 86 | @endverbatim | |
| 87 | * @{ | |
| 88 | */ | |
| 89 | ||
| 90 | /** | |
| 91 | * @brief Flush the RX fifo. | |
| 92 | * @param hspi pointer to a SPI_HandleTypeDef structure that contains | |
| 93 | * the configuration information for the specified SPI module. | |
| 94 | * @retval HAL status | |
| 95 | */ | |
| 96 | HAL_StatusTypeDef HAL_SPIEx_FlushRxFifo(SPI_HandleTypeDef *hspi) | |
| 97 | { | |
| 98 | __IO uint32_t tmpreg; | |
| 99 | uint8_t count = 0U; | |
| 100 | while ((hspi->Instance->SR & SPI_FLAG_FRLVL) != SPI_FRLVL_EMPTY) | |
| 101 | { | |
| 102 | count++; | |
| 103 | tmpreg = hspi->Instance->DR; | |
| 104 | UNUSED(tmpreg); /* To avoid GCC warning */ | |
| 105 | if (count == SPI_FIFO_SIZE) | |
| 106 | { | |
| 107 | return HAL_TIMEOUT; | |
| 108 | } | |
| 109 | } | |
| 110 | return HAL_OK; | |
| 111 | } | |
| 112 | ||
| 113 | /** | |
| 114 | * @} | |
| 115 | */ | |
| 116 | ||
| 117 | /** | |
| 118 | * @} | |
| 119 | */ | |
| 120 | ||
| 121 | #endif /* HAL_SPI_MODULE_ENABLED */ | |
| 122 | ||
| 123 | /** | |
| 124 | * @} | |
| 125 | */ | |
| 126 | ||
| 127 | /** | |
| 128 | * @} | |
| 129 | */ | |
| 130 | ||
| 131 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ | |
