How to use MDMA for QuadSPI in STM32H7 series

[jumman_JHINGA]

Hello Guys!

Im using STM32H743IITx MCU and W25Q128 QuadSPI. i want to know that how to use MDMA feature for QuadSPI.

Thanks.

[Saket_Om]

Hello @jumman_JHINGA 

Please refer to the MDMA configuration in the example found at 'Projects/STM32H743I-EVAL/Examples/QSPI/QSPI_ReadWriteDual_DMA'.

/*##-4- Configure the DMA channel ###########################################*/
 /* Enable MDMA clock */
 /* Input MDMA */
 /* Set the parameters to be configured */ 
 hmdma.Init.Request = MDMA_REQUEST_QUADSPI_FIFO_TH;
 hmdma.Init.TransferTriggerMode = MDMA_BUFFER_TRANSFER;
 hmdma.Init.Priority = MDMA_PRIORITY_HIGH;
 hmdma.Init.Endianness = MDMA_LITTLE_ENDIANNESS_PRESERVE;
 
 hmdma.Init.SourceInc = MDMA_SRC_INC_BYTE;
 hmdma.Init.DestinationInc = MDMA_DEST_INC_DISABLE;
 hmdma.Init.SourceDataSize = MDMA_SRC_DATASIZE_BYTE;
 hmdma.Init.DestDataSize = MDMA_DEST_DATASIZE_BYTE;
 hmdma.Init.DataAlignment = MDMA_DATAALIGN_PACKENABLE;
 hmdma.Init.BufferTransferLength = 4;
 hmdma.Init.SourceBurst = MDMA_SOURCE_BURST_SINGLE;
 hmdma.Init.DestBurst = MDMA_DEST_BURST_SINGLE;
 
 hmdma.Init.SourceBlockAddressOffset = 0;
 hmdma.Init.DestBlockAddressOffset = 0;

 hmdma.Instance = MDMA_Channel1;

 /* Associate the DMA handle */
 __HAL_LINKDMA(hqspi, hmdma, hmdma);
 
 /* DeInitialize the MDMA Stream */
 HAL_MDMA_DeInit(&hmdma); 
 /* Initialize the MDMA stream */
 HAL_MDMA_Init(&hmdma);

 /* Enable and set QuadSPI interrupt to the lowest priority */
 HAL_NVIC_SetPriority(MDMA_IRQn, 0x00, 0);
 HAL_NVIC_EnableIRQ(MDMA_IRQn);