Question
How to properly configure DMA in order to use linked list in non secure Application (TZEN = 1) on STM32U585
Hi,
our porject use TZEN =1;
A custom Bootlaoder (secure app) is executed at begin and after we call a non secure Application.
The non secure Application as already been tested/validated with TZEN = 0.
This application use GPDAM channel 10 ro read data from ADC4.
With TZEN = 1 , HAL_ADC_Start_DMA is not wroking.
I Put GPDMA register config arround __HAL_DMA_ENABLE
DMA return USEF error.
Does anyone has an idea of why it fail?
SRAM 1-2-3 are configure as non secure (application can read/write inside it).
All peripheral are configured as non secure from Bootloader
HAL_GTZC_TZSC_ConfigPeriphAttributes(GTZC_PERIPH_ALL, GTZC_TZSC_PERIPH_NSEC|GTZC_TZSC_PERIPH_NPRIV)This is DMA node configuration :
pNodeConfig.NodeType = DMA_GPDMA_LINEAR_NODE;
pNodeConfig.Init.Request = GPDMA1_REQUEST_ADC4;
pNodeConfig.Init.BlkHWRequest = DMA_BREQ_SINGLE_BURST;
pNodeConfig.Init.Direction = DMA_PERIPH_TO_MEMORY;
pNodeConfig.Init.SrcInc = DMA_SINC_FIXED;
pNodeConfig.Init.DestInc = DMA_DINC_INCREMENTED;
pNodeConfig.Init.SrcDataWidth = DMA_SRC_DATAWIDTH_HALFWORD;
pNodeConfig.Init.DestDataWidth = DMA_DEST_DATAWIDTH_HALFWORD;
pNodeConfig.Init.SrcBurstLength = 1;
pNodeConfig.Init.DestBurstLength = 1;
pNodeConfig.Init.TransferAllocatedPort = DMA_SRC_ALLOCATED_PORT0|DMA_DEST_ALLOCATED_PORT0;
pNodeConfig.Init.TransferEventMode = DMA_TCEM_BLOCK_TRANSFER;
pNodeConfig.TriggerConfig.TriggerPolarity = DMA_TRIG_POLARITY_MASKED;
pNodeConfig.DataHandlingConfig.DataExchange = DMA_EXCHANGE_NONE;
pNodeConfig.DataHandlingConfig.DataAlignment = DMA_DATA_RIGHTALIGN_ZEROPADDED;
pNodeConfig.SrcAddress = 0;
pNodeConfig.DstAddress = 0;
pNodeConfig.DataSize = 0;
/* Build ADC4_Node Node */
ret |= HAL_DMAEx_List_BuildNode(&pNodeConfig, &ADC4_Node);
/* Insert ADC4_Node to Queue */
ret |= HAL_DMAEx_List_InsertNode_Tail(&ADC4_Queue, &ADC4_Node);I don't understand why it fail:
- Bootloader doesn't use DMA
- Non secure App can configure DMA so I expect that DMA is correctly clocked
- Memory is accessilbe from non secure APP
Thanks for your help