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author | Ideenmodellierer |
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date | Sun, 22 Dec 2024 21:19:21 +0100 |
parents | c78bcbd5deda |
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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 * * <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****/