I. Test environment

STM32H750VBTX development board

Second, Steps

1, open serial port idle interrupt

HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)// Open IDLE in front of the main function, this size is the size of the buffer array you set yourself, the file posted below has the definition of this function

This function is in stm32h7xx_hal_uart_ex.c, which has already opened the serial port idle interrupt. What I checked before is not correct. Only in a communication group did I know that it was so simple.

2. Use the serial port idle callback function directly

void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_tspan> Size){if(huart->Instance == USART1){//Call the serial port idle callback function directly, this size is the number of bytes received by the serial port each time}HAL_UARTEx_ReceiveToIdle_IT() //Open serial port idle interrupt again}

3, HAL_UART_IRQHandler(&huart1);

void USART1_IRQHandler(void){/* USER CODE BEGIN USART1_IRQn 0 *//* USER CODE END USART1_IRQn 0 */HAL_UART_IRQHandler(&huart1);//The processing of the flag bit has helped us deal with it. We directly call the callback function, namelyCan!/* USER CODE BEGIN USART1_IRQn 1 *//* USER CODE END USART1_IRQn 1 */}

III. Summary

 **Using the serial port idle interrupt through the HAL library is so simple. I have checked a lot of information before, but they are not using the HAL library. They are all rewritten.Stuff, it's a lot easier to actually use the HAL library.At present, only the serial port idle interrupt is used, and the update will continue after the subsequent use of DMA.Thank you to the big guys in the group who have carefully guided and answered questions!!!**