246 lines
7.8 KiB
C
246 lines
7.8 KiB
C
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/**
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******************************************************************************
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* @file stm32h7xx_hal_spi_ex.c
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* @author MCD Application Team
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* @version V1.2.0
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* @date 29-December-2017
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* @brief Extended SPI HAL module driver.
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* This file provides firmware functions to manage the following
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* SPI peripheral extended functionalities :
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* + IO operation functions
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* + Peripheral Control functions
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*
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32h7xx_hal.h"
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/** @addtogroup STM32H7xx_HAL_Driver
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* @{
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*/
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/** @defgroup SPIEx SPIEx
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* @brief SPI Extended HAL module driver
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* @{
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*/
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#ifdef HAL_SPI_MODULE_ENABLED
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/* Private typedef -----------------------------------------------------------*/
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/* Private defines -----------------------------------------------------------*/
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/* Private macros ------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @defgroup SPIEx_Exported_Functions SPIEx Exported Functions
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* @{
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*/
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/** @defgroup SPIEx_Exported_Functions_Group1 IO operation functions
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* @brief Data transfers functions
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*
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@verbatim
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==============================================================================
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##### IO operation functions #####
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===============================================================================
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[..]
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This subsection provides a set of extended functions to manage the SPI
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data transfers.
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(#) SPIEx function:
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(++) HAL_SPIEx_FlushRxFifo()
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(++) HAL_SPIEx_FlushRxFifo()
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(++) HAL_SPIEx_EnableLockConfiguration()
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(++) HAL_SPIEx_ConfigureUnderrun()
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@endverbatim
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* @{
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*/
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/**
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* @brief Flush the RX fifo.
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* @param hspi: pointer to a SPI_HandleTypeDef structure that contains
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* the configuration information for the specified SPI module.
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_SPIEx_FlushRxFifo(SPI_HandleTypeDef *hspi)
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{
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__IO uint32_t tmpreg;
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uint8_t count = 0;
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while ( ((hspi->Instance->SR & SPI_FLAG_FRLVL) != SPI_FRLVL_EMPTY) || ((hspi->Instance->SR & SPI_FLAG_RXWNE) == SPI_FLAG_RXWNE))
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{
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count+=4;
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tmpreg = hspi->Instance->RXDR;
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UNUSED(tmpreg); /* To avoid GCC warning */
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if (IS_SPI_HIGHEND_INSTANCE(hspi->Instance))
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{
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if(count > SPI_HIGHEND_FIFO_SIZE)
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{
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return HAL_TIMEOUT;
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}
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}
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else
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{
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if(count > SPI_LOWEND_FIFO_SIZE)
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{
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return HAL_TIMEOUT;
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}
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}
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}
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return HAL_OK;
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}
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/**
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* @brief Enable the Lock for the AF configuration of associated IOs
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* and write protect the Content of Configuartion register 2
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* when SPI is enabled
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* @param hspi: pointer to a SPI_HandleTypeDef structure that contains
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* the configuration information for SPI module.
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* @retval None
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*/
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HAL_StatusTypeDef HAL_SPIEx_EnableLockConfiguration(SPI_HandleTypeDef *hspi)
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{
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HAL_StatusTypeDef errorcode = HAL_OK;
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/* Process Locked */
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__HAL_LOCK(hspi);
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if (hspi->State != HAL_SPI_STATE_READY)
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{
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errorcode = HAL_BUSY;
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hspi->State = HAL_SPI_STATE_READY;
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/* Process Unlocked */
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__HAL_UNLOCK(hspi);
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return errorcode;
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}
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/* Check if the SPI is disabled to edit IOLOCK bit */
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if ((hspi->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE)
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{
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SET_BIT(hspi->Instance->CR1 , SPI_CR1_IOLOCK);
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}
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else
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{
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/* Disable SPI peripheral */
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__HAL_SPI_DISABLE(hspi);
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SET_BIT(hspi->Instance->CR1 , SPI_CR1_IOLOCK);
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/* Enable SPI peripheral */
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__HAL_SPI_ENABLE(hspi);
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}
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hspi->State = HAL_SPI_STATE_READY;
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/* Process Unlocked */
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__HAL_UNLOCK(hspi);
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return errorcode;
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}
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/**
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* @brief Configure the UNDERRUN condition and behavior of slave transmitter.
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* @param hspi: pointer to a SPI_HandleTypeDef structure that contains
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* the configuration information for SPI module.
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* @param UnderrunDetection : Detection of underrun condition at slave transmitter
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* This parameter can be a value of @ref SPI_Underrun_Detection.
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* @param UnderrunBehaviour : Behavior of slave transmitter at underrun condition
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* This parameter can be a value of @ref SPI_Underrun_Behaviour.
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* @retval None
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*/
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HAL_StatusTypeDef HAL_SPIEx_ConfigureUnderrun(SPI_HandleTypeDef *hspi, uint32_t UnderrunDetection, uint32_t UnderrunBehaviour)
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{
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HAL_StatusTypeDef errorcode = HAL_OK;
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/* Process Locked */
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__HAL_LOCK(hspi);
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/* Check State and Insure that Underrun configuration is managed only by Salve */
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if ((hspi->State != HAL_SPI_STATE_READY) || (hspi->Init.Mode != SPI_MODE_SLAVE))
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{
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errorcode = HAL_BUSY;
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hspi->State = HAL_SPI_STATE_READY;
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/* Process Unlocked */
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__HAL_UNLOCK(hspi);
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return errorcode;
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}
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/* Check the parameters */
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assert_param(IS_SPI_UNDERRUN_DETECTION(UnderrunDetection));
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assert_param(IS_SPI_UNDERRUN_BEHAVIOUR(UnderrunBehaviour));
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/* Check if the SPI is disabled to edit CFG1 register */
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if ((hspi->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE)
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{
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/* Configure Underrun fields */
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MODIFY_REG(hspi->Instance->CFG1, SPI_CFG1_UDRDET, UnderrunDetection);
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MODIFY_REG(hspi->Instance->CFG1, SPI_CFG1_UDRCFG, UnderrunBehaviour);
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}
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else
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{
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/* Disable SPI peripheral */
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__HAL_SPI_DISABLE(hspi);
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/* Configure Underrun fields */
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MODIFY_REG(hspi->Instance->CFG1, SPI_CFG1_UDRDET, UnderrunDetection);
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MODIFY_REG(hspi->Instance->CFG1, SPI_CFG1_UDRCFG, UnderrunBehaviour);
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/* Enable SPI peripheral */
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__HAL_SPI_ENABLE(hspi);
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}
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hspi->State = HAL_SPI_STATE_READY;
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/* Process Unlocked */
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__HAL_UNLOCK(hspi);
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return errorcode;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* HAL_SPI_MODULE_ENABLED */
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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