STM32H723VGTx DMA TX reboot use fail

[YutinhLin]

Cube setting is OK!

First run OK!

if(HAL_OK != HAL_UART_Transmit(CO_INFO.channel, co_dma_tx_data, send_len, 0xFFFF))

    {

        DEBUG_PRINT("CO MODULE SEND DATA ERROR!!\r\n");

    }

Then setting OK!

if(HAL_OK==HAL_UART_AbortReceive(CO_INFO.channel))

if(HAL_OK==HAL_UARTEx_ReceiveToIdle_DMA(CO_INFO.channel,(uint8_t*)CO_INFO.RX.data,CO_UART_BUF_LENGTH))

But second run Fail !!

if(HAL_OK != HAL_UART_Transmit(CO_INFO.channel, co_dma_tx_data, send_len, 0xFFFF))

trace HAL_UART_Transmit() function

if (huart->gState == HAL_UART_STATE_READY) 

the huart->gState value always 0x33

so always return HAL_BUSY

[TDK]

The functions you listed will work as expected with the latest HAL library. You are probably executing a DMA transmit somewhere that you've forgotten about or you are using 3+ year old library code.

If you still have problems, please provide a full compile-able project which shows the issue.

Here is code which functions without error on a new STM32H723 project:

  if (HAL_UART_Transmit(&huart4, data, sizeof(data), HAL_MAX_DELAY) != HAL_OK) {
  	Error_Handler();
  }
  if (HAL_UART_AbortReceive(&huart4) != HAL_OK) {
  	Error_Handler();
  }
  if (HAL_UARTEx_ReceiveToIdle_DMA(&huart4, &data, sizeof(data)) != HAL_OK) {
  	Error_Handler();
  }
  if (HAL_UART_Transmit(&huart4, data, sizeof(data), HAL_MAX_DELAY) != HAL_OK) {
  	Error_Handler();
  }

TX and RX states for UART are independent and are handled correctly within HAL.

Related/duplicate:

HAL_UART_Transmit_DMA 使用 HAL_UART_AbortReceive 後異常 - STMicroelectronics Community