Hi TDK,
here is the are functions from main:
static void MX_SAI1_Init(void)
{
hsai_BlockA1.Instance = SAI1_Block_A;
hsai_BlockA1.Init.AudioMode = SAI_MODEMASTER_TX;
hsai_BlockA1.Init.Synchro = SAI_ASYNCHRONOUS;
hsai_BlockA1.Init.OutputDrive = SAI_OUTPUTDRIVE_DISABLE;
hsai_BlockA1.Init.NoDivider = SAI_MASTERDIVIDER_ENABLE;
hsai_BlockA1.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_EMPTY;
hsai_BlockA1.Init.AudioFrequency = SAI_AUDIO_FREQUENCY_48K;
hsai_BlockA1.Init.SynchroExt = SAI_SYNCEXT_DISABLE;
hsai_BlockA1.Init.MonoStereoMode = SAI_STEREOMODE;
hsai_BlockA1.Init.CompandingMode = SAI_NOCOMPANDING;
hsai_BlockA1.Init.TriState = SAI_OUTPUT_NOTRELEASED;
if (HAL_SAI_InitProtocol(&hsai_BlockA1, SAI_I2S_STANDARD, SAI_PROTOCOL_DATASIZE_16BIT, 2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SAI1_Init 2 */
/* USER CODE END SAI1_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);
//((DMA_Stream_TypeDef *)&hdma_sai1_a)->CR & DMA_SxCR_CT) = SET;
}
and here is the part from hal_msp:
extern DMA_HandleTypeDef hdma_sai1_a;
static uint32_t SAI1_client =0;
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
PD6 ------> SAI1_SD_A
PE5 ------> SAI1_SCK_A
PE4 ------> SAI1_FS_A
PG7 ------> SAI1_MCLK_A
*/
GPIO_InitStruct.Pin = 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(GPIOD, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_4;
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);
GPIO_InitStruct.Pin = GPIO_PIN_7;
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(GPIOG, &GPIO_InitStruct);
/* Peripheral DMA init*/
hdma_sai1_a.Instance = DMA1_Stream0;
hdma_sai1_a.Init.Request = DMA_REQUEST_SAI1_A;
hdma_sai1_a.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_sai1_a.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_sai1_a.Init.MemInc = DMA_MINC_ENABLE;
hdma_sai1_a.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
hdma_sai1_a.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
hdma_sai1_a.Init.Mode = DMA_CIRCULAR;
hdma_sai1_a.Init.Priority = DMA_PRIORITY_HIGH;
hdma_sai1_a.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_sai1_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_sai1_a);
__HAL_LINKDMA(hsai,hdmatx,hdma_sai1_a);
}
}
finally I start the SAI/DMA with :
void StartAudioDMA(void){
__HAL_DMA_ENABLE_IT(&hdma_sai1_a, DMA_IT_TC);
dma_error = HAL_DMAEx_MultiBufferStart(&hdma_sai1_a, (uint32_t)(&buff_01), (uint32_t)(SAI1_BASE + 0x20),(uint32_t)(&buff_02), 192);
SET_BIT(SAI1_Block_A->CR1, SAI_xCR1_DMAEN);
__HAL_SAI_ENABLE(&hsai_BlockA1);
}
dma_error = 0;
