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1.串口1 USART1初始化 [注意使能接收中断]

1. /**
   

2. * @brief USART1 Initialization Function
   

3. * @param None
   

4. * @retval None
   

5. */
   

6. UART_HandleTypeDef huart1;
   

7. void MX_USART1_UART_Init(void)
   

8. {
   

9. huart1.Instance = USART1;
   

10. huart1.Init.BaudRate = 115200;
    

11. huart1.Init.WordLength = UART_WORDLENGTH_8B;
    

12. huart1.Init.StopBits = UART_STOPBITS_1;
    

13. huart1.Init.Parity = UART_PARITY_NONE;
    

14. huart1.Init.Mode = UART_MODE_TX_RX;
    

15. huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    

16. huart1.Init.OverSampling = UART_OVERSAMPLING_16;
    

17. huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
    

18. huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
    

19. if (HAL_UART_Init(&huart1) != HAL_OK)
    

20. {
    

21. Error_Handler();
    

22. }
    

23. //使能接收中断
    

24. HAL_UART_Receive_IT(&huart1,usart1_RxBuf_temp,1); // Enable the USART1 Interrupt
    

25. }

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2.串口接收中断

1. /**
   

2. * @brief This function handles USART1 global interrupt / USART1 wake-up interrupt through EXTI line 25.
   

3. */
   

4. void USART1_IRQHandler(void)
   

5. {
   

6. HAL_UART_IRQHandler(&huart1);
   

7. }

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3.串口接收中断完成回调函数

1. /**
   

2. * @brief Rx Transfer completed callback
   

3. * @param UartHandle: UART handle
   

4. * @note This example shows a simple way to report end of IT Rx transfer, and
   

5. * you can add your own implementation.
   

6. * @retval None
   

7. */
   

8. void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
   

9. {
   

10. if(UartHandle->Instance == USART1)
    

11. {
    

12. Netctrlp_Receive(usart1_RxBuf_temp[0]);
    

13. HAL_UART_Receive_IT(&huart1,usart1_RxBuf_temp,1); // 重新使能串口1接收中断
    

14. }
    

15. }

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4.重定向输入输出，将输出重定向至printf

1. uint8_t ch;
   

2. uint8_t ch_r;
   

3. //重写这个函数,重定向printf函数到串口，意思就是说printf直接输出到串口，其默认输出到控制台的
   

4. /*fputc*/
   

5. int fputc(int c, FILE * f)
   

6. {
   

7. ch=c;
   

8. // HAL_UART_Transmit_IT(&huart1,&ch,1);//发送串口
   

9. HAL_UART_Transmit(&huart1,&ch,1,100);//发送串口
   

10. return ch;
    

11. }
    

12. 
    

13. //重定向scanf函数到串口 意思就是说接受串口发过来的数据，其默认是接受控制台的数据
    

14. /*fgetc*/
    

15. int fgetc(FILE * F)
    

16. {
    

17. HAL_UART_Receive_IT(&huart1,&ch_r,1);//接收
    

18. return ch_r;
    

19. }

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5.main.c 主函数

1. int main(void) //SLAVE
   

2. {
   

3. HAL_Init();
   

4. /* Configure the system clock */
   

5. SystemClock_Config();
   

6. MX_USART1_UART_Init();
   

7. 
   

8. while(1){
   

9. DBG_print(DBG_DEBUG, " A.");
   

10. HAL_Delay(100);
    

11. }
    

12. }