Solved
STM32H743: DMA error for SAI interface
Hi all,
I'm currently working on a STM32H743. The idea is to use a SAI peripherals to read an Audio stream:
- The SAI is set to be a Master receive with a circular buffer and a DMA
The issue is that as soon as the HAL_SAI_Receive_DMA is called, then the code enters into the error callback HAL_SAI_ErrorCallback with an error of type HAL_SAI_ERROR_DMA, HAL_DMA_ERROR_TE.
The SAI clock is set at 4 MHz
I tried the HAL_SAI_Receive without DMA and all works fine.
So for sure i'm doing something wrong with the DMA configuration .
static uint8_t buf_rx[2] = { 0, 0 };
int main(void)
{
HAL_Init();
SystemClock_Config();
PeriphCommonClock_Config();
MX_GPIO_Init();
MX_DMA_Init();
MX_SAI2_Init();
HAL_SAI_Receive_DMA(&hsai_BlockA2, buf_rx, 2);
while (1)
{
HAL_Delay(1);
}
}static void MX_SAI2_Init(void)
{
/* USER CODE BEGIN SAI2_Init 0 */
/* USER CODE END SAI2_Init 0 */
/* USER CODE BEGIN SAI2_Init 1 */
/* USER CODE END SAI2_Init 1 */
hsai_BlockA2.Instance = SAI2_Block_A;
hsai_BlockA2.Init.Protocol = SAI_FREE_PROTOCOL;
hsai_BlockA2.Init.AudioMode = SAI_MODEMASTER_RX;
hsai_BlockA2.Init.DataSize = SAI_DATASIZE_8;
hsai_BlockA2.Init.FirstBit = SAI_FIRSTBIT_MSB;
hsai_BlockA2.Init.ClockStrobing = SAI_CLOCKSTROBING_FALLINGEDGE;
hsai_BlockA2.Init.Synchro = SAI_ASYNCHRONOUS;
hsai_BlockA2.Init.OutputDrive = SAI_OUTPUTDRIVE_DISABLE;
hsai_BlockA2.Init.NoDivider = SAI_MASTERDIVIDER_ENABLE;
hsai_BlockA2.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_FULL;
hsai_BlockA2.Init.AudioFrequency = SAI_AUDIO_FREQUENCY_48K;
hsai_BlockA2.Init.SynchroExt = SAI_SYNCEXT_DISABLE;
hsai_BlockA2.Init.MonoStereoMode = SAI_MONOMODE;
hsai_BlockA2.Init.CompandingMode = SAI_NOCOMPANDING;
hsai_BlockA2.Init.PdmInit.Activation = DISABLE;
hsai_BlockA2.Init.PdmInit.MicPairsNbr = 1;
hsai_BlockA2.Init.PdmInit.ClockEnable = SAI_PDM_CLOCK1_ENABLE;
hsai_BlockA2.FrameInit.FrameLength = 16;
hsai_BlockA2.FrameInit.ActiveFrameLength = 1;
hsai_BlockA2.FrameInit.FSDefinition = SAI_FS_STARTFRAME;
hsai_BlockA2.FrameInit.FSPolarity = SAI_FS_ACTIVE_LOW;
hsai_BlockA2.FrameInit.FSOffset = SAI_FS_FIRSTBIT;
hsai_BlockA2.SlotInit.FirstBitOffset = 0;
hsai_BlockA2.SlotInit.SlotSize = SAI_SLOTSIZE_DATASIZE;
hsai_BlockA2.SlotInit.SlotNumber = 2;
hsai_BlockA2.SlotInit.SlotActive = 0x00000003;
if (HAL_SAI_Init(&hsai_BlockA2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SAI2_Init 2 */
/* USER CODE END SAI2_Init 2 */
}
/**
* Enable DMA controller clock
*/
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMA1_CLK_ENABLE();
/* DMA interrupt init */
/* DMA1_Stream0_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Stream0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Stream0_IRQn);
}void HAL_SAI_MspInit(SAI_HandleTypeDef* hsai)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* SAI1 */
if(hsai->Instance==SAI1_Block_A)
{
/* Peripheral clock enable */
if (SAI1_client == 0)
{
__HAL_RCC_SAI1_CLK_ENABLE();
}
SAI1_client ++;
/**SAI1_A_Block_A GPIO Configuration
PE4 ------> SAI1_FS_A
PE5 ------> SAI1_SCK_A
PE6 ------> SAI1_SD_A
*/
GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF6_SAI1;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
}
/* SAI2 */
if(hsai->Instance==SAI2_Block_A)
{
/* Peripheral clock enable */
if (SAI2_client == 0)
{
__HAL_RCC_SAI2_CLK_ENABLE();
}
SAI2_client ++;
/**SAI2_A_Block_A GPIO Configuration
PD11 ------> SAI2_SD_A
PD12 ------> SAI2_FS_A
PD13 ------> SAI2_SCK_A
*/
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF10_SAI2;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
/* Peripheral DMA init*/
hdma_sai2_a.Instance = DMA1_Stream0;
hdma_sai2_a.Init.Request = DMA_REQUEST_SAI2_A;
hdma_sai2_a.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_sai2_a.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_sai2_a.Init.MemInc = DMA_MINC_ENABLE;
hdma_sai2_a.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_sai2_a.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_sai2_a.Init.Mode = DMA_CIRCULAR;
hdma_sai2_a.Init.Priority = DMA_PRIORITY_HIGH;
hdma_sai2_a.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_sai2_a) != HAL_OK)
{
Error_Handler();
}
/* Several peripheral DMA handle pointers point to the same DMA handle.
Be aware that there is only one channel to perform all the requested DMAs. */
__HAL_LINKDMA(hsai,hdmarx,hdma_sai2_a);
__HAL_LINKDMA(hsai,hdmatx,hdma_sai2_a);
}
}