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Julien Chevalley
308
Drivers/STM32F7xx_HAL_Driver/Src/stm32f7xx_hal_dma_ex.c
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308
Drivers/STM32F7xx_HAL_Driver/Src/stm32f7xx_hal_dma_ex.c
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/**
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******************************************************************************
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* @file stm32f7xx_hal_dma_ex.c
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* @author MCD Application Team
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* @brief DMA Extension HAL module driver
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* This file provides firmware functions to manage the following
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* functionalities of the DMA Extension peripheral:
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* + Extended features functions
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*
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@verbatim
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==============================================================================
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##### How to use this driver #####
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==============================================================================
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[..]
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The DMA Extension HAL driver can be used as follows:
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(+) Start a multi buffer transfer using the HAL_DMA_MultiBufferStart() function
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for polling mode or HAL_DMA_MultiBufferStart_IT() for interrupt mode.
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-@- In Memory-to-Memory transfer mode, Multi (Double) Buffer mode is not allowed.
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-@- When Multi (Double) Buffer mode is enabled, the transfer is circular by default.
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-@- In Multi (Double) buffer mode, it is possible to update the base address for
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the AHB memory port on the fly (DMA_SxM0AR or DMA_SxM1AR) when the stream is enabled.
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@endverbatim
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file in
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* the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f7xx_hal.h"
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/** @addtogroup STM32F7xx_HAL_Driver
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* @{
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*/
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/** @defgroup DMAEx DMAEx
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* @brief DMA Extended HAL module driver
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* @{
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*/
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#ifdef HAL_DMA_MODULE_ENABLED
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/* Private types -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private Constants ---------------------------------------------------------*/
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/* Private macros ------------------------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/** @addtogroup DMAEx_Private_Functions
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* @{
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*/
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static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength);
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/**
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* @}
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*/
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/* Exported functions ---------------------------------------------------------*/
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/** @addtogroup DMAEx_Exported_Functions
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* @{
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*/
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/** @addtogroup DMAEx_Exported_Functions_Group1
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*
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@verbatim
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===============================================================================
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##### Extended features functions #####
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===============================================================================
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[..] This section provides functions allowing to:
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(+) Configure the source, destination address and data length and
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Start MultiBuffer DMA transfer
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(+) Configure the source, destination address and data length and
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Start MultiBuffer DMA transfer with interrupt
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(+) Change on the fly the memory0 or memory1 address.
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@endverbatim
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* @{
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*/
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/**
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* @brief Starts the multi_buffer DMA Transfer.
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* @param hdma pointer to a DMA_HandleTypeDef structure that contains
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* the configuration information for the specified DMA Stream.
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* @param SrcAddress The source memory Buffer address
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* @param DstAddress The destination memory Buffer address
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* @param SecondMemAddress The second memory Buffer address in case of multi buffer Transfer
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* @param DataLength The length of data to be transferred from source to destination
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_DMAEx_MultiBufferStart(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t SecondMemAddress, uint32_t DataLength)
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{
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HAL_StatusTypeDef status = HAL_OK;
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/* Check the parameters */
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assert_param(IS_DMA_BUFFER_SIZE(DataLength));
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/* Memory-to-memory transfer not supported in double buffering mode */
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if (hdma->Init.Direction == DMA_MEMORY_TO_MEMORY)
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{
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hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
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status = HAL_ERROR;
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}
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else
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{
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/* Process Locked */
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__HAL_LOCK(hdma);
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if(HAL_DMA_STATE_READY == hdma->State)
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{
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/* Change DMA peripheral state */
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hdma->State = HAL_DMA_STATE_BUSY;
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/* Enable the double buffer mode */
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hdma->Instance->CR |= (uint32_t)DMA_SxCR_DBM;
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/* Configure DMA Stream destination address */
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hdma->Instance->M1AR = SecondMemAddress;
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/* Configure the source, destination address and the data length */
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DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);
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/* Enable the peripheral */
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__HAL_DMA_ENABLE(hdma);
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}
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else
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{
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/* Return error status */
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status = HAL_BUSY;
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}
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}
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return status;
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}
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/**
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* @brief Starts the multi_buffer DMA Transfer with interrupt enabled.
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* @param hdma pointer to a DMA_HandleTypeDef structure that contains
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* the configuration information for the specified DMA Stream.
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* @param SrcAddress The source memory Buffer address
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* @param DstAddress The destination memory Buffer address
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* @param SecondMemAddress The second memory Buffer address in case of multi buffer Transfer
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* @param DataLength The length of data to be transferred from source to destination
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_DMAEx_MultiBufferStart_IT(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t SecondMemAddress, uint32_t DataLength)
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{
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HAL_StatusTypeDef status = HAL_OK;
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/* Check the parameters */
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assert_param(IS_DMA_BUFFER_SIZE(DataLength));
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/* Memory-to-memory transfer not supported in double buffering mode */
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if (hdma->Init.Direction == DMA_MEMORY_TO_MEMORY)
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{
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hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
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return HAL_ERROR;
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}
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/* Process locked */
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__HAL_LOCK(hdma);
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if(HAL_DMA_STATE_READY == hdma->State)
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{
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/* Change DMA peripheral state */
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hdma->State = HAL_DMA_STATE_BUSY;
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/* Initialize the error code */
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hdma->ErrorCode = HAL_DMA_ERROR_NONE;
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/* Enable the Double buffer mode */
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hdma->Instance->CR |= (uint32_t)DMA_SxCR_DBM;
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/* Configure DMA Stream destination address */
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hdma->Instance->M1AR = SecondMemAddress;
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/* Configure the source, destination address and the data length */
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DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);
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/* Clear all flags */
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__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));
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__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));
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__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma));
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__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_DME_FLAG_INDEX(hdma));
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__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_FE_FLAG_INDEX(hdma));
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/* Enable Common interrupts*/
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hdma->Instance->CR |= DMA_IT_TC | DMA_IT_TE | DMA_IT_DME;
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hdma->Instance->FCR |= DMA_IT_FE;
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if((hdma->XferHalfCpltCallback != NULL) || (hdma->XferM1HalfCpltCallback != NULL))
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{
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hdma->Instance->CR |= DMA_IT_HT;
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}
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/* Enable the peripheral */
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__HAL_DMA_ENABLE(hdma);
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}
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else
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{
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/* Process unlocked */
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__HAL_UNLOCK(hdma);
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/* Return error status */
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status = HAL_BUSY;
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}
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return status;
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}
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/**
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* @brief Change the memory0 or memory1 address on the fly.
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* @param hdma pointer to a DMA_HandleTypeDef structure that contains
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* the configuration information for the specified DMA Stream.
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* @param Address The new address
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* @param memory the memory to be changed, This parameter can be one of
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* the following values:
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* MEMORY0 /
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* MEMORY1
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* @note The MEMORY0 address can be changed only when the current transfer use
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* MEMORY1 and the MEMORY1 address can be changed only when the current
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* transfer use MEMORY0.
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_DMAEx_ChangeMemory(DMA_HandleTypeDef *hdma, uint32_t Address, HAL_DMA_MemoryTypeDef memory)
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{
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if(memory == MEMORY0)
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{
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/* change the memory0 address */
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hdma->Instance->M0AR = Address;
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}
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else
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{
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/* change the memory1 address */
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hdma->Instance->M1AR = Address;
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}
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return HAL_OK;
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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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/** @addtogroup DMAEx_Private_Functions
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* @{
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*/
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/**
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* @brief Set the DMA Transfer parameter.
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* @param hdma pointer to a DMA_HandleTypeDef structure that contains
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* the configuration information for the specified DMA Stream.
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* @param SrcAddress The source memory Buffer address
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* @param DstAddress The destination memory Buffer address
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* @param DataLength The length of data to be transferred from source to destination
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* @retval HAL status
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*/
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static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
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{
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/* Configure DMA Stream data length */
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hdma->Instance->NDTR = DataLength;
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/* Peripheral to Memory */
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if((hdma->Init.Direction) == DMA_MEMORY_TO_PERIPH)
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{
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/* Configure DMA Stream destination address */
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hdma->Instance->PAR = DstAddress;
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/* Configure DMA Stream source address */
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hdma->Instance->M0AR = SrcAddress;
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}
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/* Memory to Peripheral */
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else
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{
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/* Configure DMA Stream source address */
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hdma->Instance->PAR = SrcAddress;
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/* Configure DMA Stream destination address */
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hdma->Instance->M0AR = DstAddress;
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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_DMA_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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