STM32F4 SAI using DMA will not trigger an interrupt

[fyyxxm]

MCU：stm32f427 STM32CUBEMX : 6.5 HAL lib:1.27

Issue: Using the SAI project generated by stm32cubemx, DMA will not trigger interrupt

In the initialization process, SAI is initialized first, and then DMA is initialized, which can trigger an interrupt. However, it will only be triggered once. If you want to continue the transmission, you must use it again: HAL_SAI_Transmit_DMA

Before change：

int main(void)
{
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  MX_GPIO_Init();

>   MX_DMA_Init();
>   MX_SAI1_Init();

  HAL_SAI_Transmit_DMA(&hsai_BlockA1, test_buff, 1024);

  while (1)
  {
    HAL_Delay(500);
  }
}

After change：

int main(void)
{
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  MX_GPIO_Init();

>   MX_SAI1_Init();
>   MX_DMA_Init();

  HAL_SAI_Transmit_DMA(&hsai_BlockA1, test_buff, 1024);

  while (1)
  {
    HAL_Delay(500);
  }
}

Since my DMA transfer mode is set to hdma_ sai1_ a.Init. Mode = DMA_ CIRCULAR;

the interrupt should be triggered all the time, not only once, unless I turn off DMA transfer

Stm32h7 series will not have this problem。

[ASELSTM]

Hi @fyyxxm,

Would you please share the whole project you have used to reproduce the issue in order to allow a better analysis of the problem.

With regards,

[ASELSTM]

Hi @fyyxxm,

Please allow me to close this thread as no activity. You may reopen it at anytime if you have any details to share with us in order to help you to solve the issue. Thank you for your comprehension.

With regards,