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/**
******************************************************************************
* @file stm32f4xx_hal_dma_ex.c
* @author MCD Application Team
* @brief DMA Extension HAL module driver
* This file provides firmware functions to manage the following
* functionalities of the DMA Extension peripheral:
* + Extended features functions
*
@verbatim
==============================================================================
##### How to use this driver #####
==============================================================================
[..]
The DMA Extension HAL driver can be used as follows:
(#) Start a multi buffer transfer using the HAL_DMA_MultiBufferStart() function
for polling mode or HAL_DMA_MultiBufferStart_IT() for interrupt mode.
-@- In Memory-to-Memory transfer mode, Multi (Double) Buffer mode is not allowed.
-@- When Multi (Double) Buffer mode is enabled the, transfer is circular by default.
-@- In Multi (Double) buffer mode, it is possible to update the base address for
the AHB memory port on the fly (DMA_SxM0AR or DMA_SxM1AR) when the stream is enabled.
@endverbatim
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file in
* the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
/** @addtogroup STM32F4xx_HAL_Driver
* @{
*/
/** @defgroup DMAEx DMAEx
* @brief DMA Extended HAL module driver
* @{
*/
#ifdef HAL_DMA_MODULE_ENABLED
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private Constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/** @addtogroup DMAEx_Private_Functions
* @{
*/
static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength);
/**
* @}
*/
/* Exported functions ---------------------------------------------------------*/
/** @addtogroup DMAEx_Exported_Functions
* @{
*/
/** @addtogroup DMAEx_Exported_Functions_Group1
*
@verbatim
===============================================================================
##### Extended features functions #####
===============================================================================
[..] This section provides functions allowing to:
(+) Configure the source, destination address and data length and
Start MultiBuffer DMA transfer
(+) Configure the source, destination address and data length and
Start MultiBuffer DMA transfer with interrupt
(+) Change on the fly the memory0 or memory1 address.
@endverbatim
* @{
*/
/**
* @brief Starts the multi_buffer DMA Transfer.
* @param hdma pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA Stream.
* @param SrcAddress The source memory Buffer address
* @param DstAddress The destination memory Buffer address
* @param SecondMemAddress The second memory Buffer address in case of multi buffer Transfer
* @param DataLength The length of data to be transferred from source to destination
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DMAEx_MultiBufferStart(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t SecondMemAddress, uint32_t DataLength)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the parameters */
assert_param(IS_DMA_BUFFER_SIZE(DataLength));
/* Memory-to-memory transfer not supported in double buffering mode */
if (hdma->Init.Direction == DMA_MEMORY_TO_MEMORY)
{
hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
status = HAL_ERROR;
}
else
{
/* Process Locked */
__HAL_LOCK(hdma);
if(HAL_DMA_STATE_READY == hdma->State)
{
/* Change DMA peripheral state */
hdma->State = HAL_DMA_STATE_BUSY;
/* Enable the double buffer mode */
hdma->Instance->CR |= (uint32_t)DMA_SxCR_DBM;
/* Configure DMA Stream destination address */
hdma->Instance->M1AR = SecondMemAddress;
/* Configure the source, destination address and the data length */
DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);
/* Enable the peripheral */
__HAL_DMA_ENABLE(hdma);
}
else
{
/* Return error status */
status = HAL_BUSY;
}
}
return status;
}
/**
* @brief Starts the multi_buffer DMA Transfer with interrupt enabled.
* @param hdma pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA Stream.
* @param SrcAddress The source memory Buffer address
* @param DstAddress The destination memory Buffer address
* @param SecondMemAddress The second memory Buffer address in case of multi buffer Transfer
* @param DataLength The length of data to be transferred from source to destination
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DMAEx_MultiBufferStart_IT(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t SecondMemAddress, uint32_t DataLength)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the parameters */
assert_param(IS_DMA_BUFFER_SIZE(DataLength));
/* Memory-to-memory transfer not supported in double buffering mode */
if (hdma->Init.Direction == DMA_MEMORY_TO_MEMORY)
{
hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
return HAL_ERROR;
}
/* Check callback functions */
if ((NULL == hdma->XferCpltCallback) || (NULL == hdma->XferM1CpltCallback) || (NULL == hdma->XferErrorCallback))
{
hdma->ErrorCode = HAL_DMA_ERROR_PARAM;
return HAL_ERROR;
}
/* Process locked */
__HAL_LOCK(hdma);
if(HAL_DMA_STATE_READY == hdma->State)
{
/* Change DMA peripheral state */
hdma->State = HAL_DMA_STATE_BUSY;
/* Initialize the error code */
hdma->ErrorCode = HAL_DMA_ERROR_NONE;
/* Enable the Double buffer mode */
hdma->Instance->CR |= (uint32_t)DMA_SxCR_DBM;
/* Configure DMA Stream destination address */
hdma->Instance->M1AR = SecondMemAddress;
/* Configure the source, destination address and the data length */
DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);
/* Clear all flags */
__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));
__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));
__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma));
__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_DME_FLAG_INDEX(hdma));
__HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_FE_FLAG_INDEX(hdma));
/* Enable Common interrupts*/
hdma->Instance->CR |= DMA_IT_TC | DMA_IT_TE | DMA_IT_DME;
hdma->Instance->FCR |= DMA_IT_FE;
if((hdma->XferHalfCpltCallback != NULL) || (hdma->XferM1HalfCpltCallback != NULL))
{
hdma->Instance->CR |= DMA_IT_HT;
}
/* Enable the peripheral */
__HAL_DMA_ENABLE(hdma);
}
else
{
/* Process unlocked */
__HAL_UNLOCK(hdma);
/* Return error status */
status = HAL_BUSY;
}
return status;
}
/**
* @brief Change the memory0 or memory1 address on the fly.
* @param hdma pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA Stream.
* @param Address The new address
* @param memory the memory to be changed, This parameter can be one of
* the following values:
* MEMORY0 /
* MEMORY1
* @note The MEMORY0 address can be changed only when the current transfer use
* MEMORY1 and the MEMORY1 address can be changed only when the current
* transfer use MEMORY0.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_DMAEx_ChangeMemory(DMA_HandleTypeDef *hdma, uint32_t Address, HAL_DMA_MemoryTypeDef memory)
{
if(memory == MEMORY0)
{
/* change the memory0 address */
hdma->Instance->M0AR = Address;
}
else
{
/* change the memory1 address */
hdma->Instance->M1AR = Address;
}
return HAL_OK;
}
/**
* @}
*/
/**
* @}
*/
/** @addtogroup DMAEx_Private_Functions
* @{
*/
/**
* @brief Set the DMA Transfer parameter.
* @param hdma pointer to a DMA_HandleTypeDef structure that contains
* the configuration information for the specified DMA Stream.
* @param SrcAddress The source memory Buffer address
* @param DstAddress The destination memory Buffer address
* @param DataLength The length of data to be transferred from source to destination
* @retval HAL status
*/
static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
{
/* Configure DMA Stream data length */
hdma->Instance->NDTR = DataLength;
/* Peripheral to Memory */
if((hdma->Init.Direction) == DMA_MEMORY_TO_PERIPH)
{
/* Configure DMA Stream destination address */
hdma->Instance->PAR = DstAddress;
/* Configure DMA Stream source address */
hdma->Instance->M0AR = SrcAddress;
}
/* Memory to Peripheral */
else
{
/* Configure DMA Stream source address */
hdma->Instance->PAR = SrcAddress;
/* Configure DMA Stream destination address */
hdma->Instance->M0AR = DstAddress;
}
}
/**
* @}
*/
#endif /* HAL_DMA_MODULE_ENABLED */
/**
* @}
*/
/**
* @}
*/
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