STM32H7 1.9.0 MDMA request not initialized

[DShekter]

Specifically I've noticed it with the octospi, but it's also impacted at least software requests.

For example, my MDMA config has

 hmdma_octospi1_fifo_th.Instance = MDMA_Channel1;
 hmdma_octospi1_fifo_th.Init.TransferTriggerMode = MDMA_BUFFER_TRANSFER;
 hmdma_octospi1_fifo_th.Init.Priority = MDMA_PRIORITY_VERY_HIGH;
 hmdma_octospi1_fifo_th.Init.Endianness = MDMA_LITTLE_ENDIANNESS_PRESERVE;
 hmdma_octospi1_fifo_th.Init.SourceInc = MDMA_SRC_INC_BYTE;
 hmdma_octospi1_fifo_th.Init.DestinationInc = MDMA_DEST_INC_DISABLE;
 hmdma_octospi1_fifo_th.Init.SourceDataSize = MDMA_SRC_DATASIZE_BYTE;
 hmdma_octospi1_fifo_th.Init.DestDataSize = MDMA_DEST_DATASIZE_BYTE;
 hmdma_octospi1_fifo_th.Init.DataAlignment = MDMA_DATAALIGN_RIGHT;
 hmdma_octospi1_fifo_th.Init.BufferTransferLength = 1;
 hmdma_octospi1_fifo_th.Init.SourceBurst = MDMA_SOURCE_BURST_SINGLE;
 hmdma_octospi1_fifo_th.Init.DestBurst = MDMA_DEST_BURST_SINGLE;
 hmdma_octospi1_fifo_th.Init.SourceBlockAddressOffset = 0;
 hmdma_octospi1_fifo_th.Init.DestBlockAddressOffset = 0;
 if (HAL_MDMA_Init(&hmdma_octospi1_fifo_th) != HAL_OK)
 {
 Error_Handler();
 }
 
 __HAL_LINKDMA(ospiHandle,hmdma,hmdma_octospi1_fifo_th);

But what it's missing is the Init.Request. So I had to add

 /* USER CODE BEGIN OCTOSPI1_MspInit 0 */
	 hmdma_octospi1_fifo_th.Init.Request = MDMA_REQUEST_OCTOSPI1_FIFO_TH;
 /* USER CODE END OCTOSPI1_MspInit 0 */

and that fixed everything. a similar thing was needed for the software request, however there are no USER CODE sections in the init function.

Code was generated with the STM32CubeIDE, version 1.7.0.

[Amel NASRI]

Hi @Community member​ ,

Thanks for bringing this issue to our attention.

I let our Expert @Khouloud ZEMMELI​ ​ review it and take the required corrective actions, if needed.

-Amel

[Khouloud ZEMMELI]

Hello @Community member​ ,

Could you please share your ioc file to check your case?

Thanks, Khouloud

[DShekter]

Sure. I've attached an IOC that shows the issue for software and OCTOSPI requests. For me, the initializations look like:

static void MX_MDMA_Init(void)
{
 
 /* MDMA controller clock enable */
 __HAL_RCC_MDMA_CLK_ENABLE();
 /* Local variables */
 
 /* Configure MDMA channel MDMA_Channel0 */
 /* Configure MDMA request hmdma_mdma_channel40_sw_0 on MDMA_Channel0 */
 hmdma_mdma_channel40_sw_0.Instance = MDMA_Channel0;
 hmdma_mdma_channel40_sw_0.Init.TransferTriggerMode = MDMA_BUFFER_TRANSFER;
 hmdma_mdma_channel40_sw_0.Init.Priority = MDMA_PRIORITY_LOW;
 hmdma_mdma_channel40_sw_0.Init.Endianness = MDMA_LITTLE_ENDIANNESS_PRESERVE;
 hmdma_mdma_channel40_sw_0.Init.SourceInc = MDMA_SRC_INC_BYTE;
 hmdma_mdma_channel40_sw_0.Init.DestinationInc = MDMA_DEST_INC_BYTE;
 hmdma_mdma_channel40_sw_0.Init.SourceDataSize = MDMA_SRC_DATASIZE_BYTE;
 hmdma_mdma_channel40_sw_0.Init.DestDataSize = MDMA_DEST_DATASIZE_BYTE;
 hmdma_mdma_channel40_sw_0.Init.DataAlignment = MDMA_DATAALIGN_PACKENABLE;
 hmdma_mdma_channel40_sw_0.Init.BufferTransferLength = 1;
 hmdma_mdma_channel40_sw_0.Init.SourceBurst = MDMA_SOURCE_BURST_SINGLE;
 hmdma_mdma_channel40_sw_0.Init.DestBurst = MDMA_DEST_BURST_SINGLE;
 hmdma_mdma_channel40_sw_0.Init.SourceBlockAddressOffset = 0;
 hmdma_mdma_channel40_sw_0.Init.DestBlockAddressOffset = 0;
 if (HAL_MDMA_Init(&hmdma_mdma_channel40_sw_0) != HAL_OK)
 {
 Error_Handler();
 }
 
 /* MDMA interrupt initialization */
 /* MDMA_IRQn interrupt configuration */
 HAL_NVIC_SetPriority(MDMA_IRQn, 0, 0);
 HAL_NVIC_EnableIRQ(MDMA_IRQn);
 
}

and

/* OCTOSPI1 MDMA Init */
 /* OCTOSPI1_FIFO_TH Init */
 hmdma_octospi1_fifo_th.Instance = MDMA_Channel1;
 hmdma_octospi1_fifo_th.Init.TransferTriggerMode = MDMA_BUFFER_TRANSFER;
 hmdma_octospi1_fifo_th.Init.Priority = MDMA_PRIORITY_LOW;
 hmdma_octospi1_fifo_th.Init.Endianness = MDMA_LITTLE_ENDIANNESS_PRESERVE;
 hmdma_octospi1_fifo_th.Init.SourceInc = MDMA_SRC_INC_BYTE;
 hmdma_octospi1_fifo_th.Init.DestinationInc = MDMA_DEST_INC_BYTE;
 hmdma_octospi1_fifo_th.Init.SourceDataSize = MDMA_SRC_DATASIZE_BYTE;
 hmdma_octospi1_fifo_th.Init.DestDataSize = MDMA_DEST_DATASIZE_BYTE;
 hmdma_octospi1_fifo_th.Init.DataAlignment = MDMA_DATAALIGN_PACKENABLE;
 hmdma_octospi1_fifo_th.Init.BufferTransferLength = 1;
 hmdma_octospi1_fifo_th.Init.SourceBurst = MDMA_SOURCE_BURST_SINGLE;
 hmdma_octospi1_fifo_th.Init.DestBurst = MDMA_DEST_BURST_SINGLE;
 hmdma_octospi1_fifo_th.Init.SourceBlockAddressOffset = 0;
 hmdma_octospi1_fifo_th.Init.DestBlockAddressOffset = 0;
 if (HAL_MDMA_Init(&hmdma_octospi1_fifo_th) != HAL_OK)
 {
 Error_Handler();
 }
 
 __HAL_LINKDMA(hospi,hmdma,hmdma_octospi1_fifo_th);