RS485正确调用方式 HAL_UART_Receive_IT(&huart3,RxBuffer,MAX_RX_BUFFER_SIZE); HAL_UARTEx_ReceiveToIdle_IT(&huart3,RxBuffer,MAX_RX_BUFFER_SIZE);//两次激活while(1){ HAL_UARTEx_ReceiveToIdle_IT(&huart3,RxBuffer,MAX_RX_BUFFER_SIZE);//重复激活 i