/** | |
****************************************************************************** | |
* @file stm32f4xx_hal_dma_ex.c | |
* @author MCD Application Team | |
* @version V1.7.0 | |
* @date 17-February-2017 | |
* @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 | |
* | |
* <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> | |
* | |
* Redistribution and use in source and binary forms, with or without modification, | |
* are permitted provided that the following conditions are met: | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* 3. Neither the name of STMicroelectronics nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* | |
****************************************************************************** | |
*/ | |
/* 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 */ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |