/** * @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) { /* Process Locked */ __HAL_LOCK(hdma); /* Current memory buffer used is Memory 0 */ if((hdma->Instance->CR & DMA_SxCR_CT) == 0) { hdma->State = HAL_DMA_STATE_BUSY_MEM0; } /* Current memory buffer used is Memory 1 */ else if((hdma->Instance->CR & DMA_SxCR_CT) != 0) { hdma->State = HAL_DMA_STATE_BUSY_MEM1; } /* Check the parameters */ assert_param(IS_DMA_BUFFER_SIZE(DataLength)); /* Disable the peripheral */ __HAL_DMA_DISABLE(hdma); /* 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); return HAL_OK; }
/** * @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; }