如何在stm32的相同回调函数中从不同的uart获取数据 [英] how to get data from different uart in same callback function in stm32

问题描述

I am using the stm32f407 controller. I am using 2 uart - 2&3. I got interrupted the first time, but the second time I got interrupted on uart 2 - I did not get interrupted on uart3.

Below is my callback function:

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    if(huart2.Instance == USART2)
    {
        gsm.RxData[gsm.RxDataCnt]=Uart_Rx_Buffer;
        gsm.RxDataCnt=(1+ gsm.RxDataCnt) % MAX_Buff_Size;
        HAL_UART_Receive_IT(&huart2,&Uart_Rx_Buffer, 1);
    }
    else if(huart3.Instance == USART3)
    {
        lidar.RxData[lidar.RxDataCnt]=uart3_RX_Data;
        lidar.RxDataCnt=(1+ lidar.RxDataCnt) % MAX_LIDAR_BUFFER;
        HAL_UART_Receive_IT(&huart3,&uart3_RX_Data, 1);
        if(lidar.RxDataCnt >MAX_COUNT_BUFFER)
        {
            lidar.received = true;
        }
    }
}

解决方案

The conditions in the if-statements are always true. You need to check the instance of the huart handle provided in the function argument, i.e.:

    if(huart->Instance == USART2)

and

    else if(huart->Instance == USART3)

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