1.串口1 USART1初始化 [注意使能接收中断]
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1. /**
   
2.   * @brief USART1 Initialization Function
   
3.   * @param None
   
4.   * @retval None
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5.   */
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6. UART_HandleTypeDef huart1;
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7. void MX_USART1_UART_Init(void)
   
8. {
   
9.   huart1.Instance = USART1;
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10.   huart1.Init.BaudRate = 115200;
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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;
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16.   huart1.Init.OverSampling = UART_OVERSAMPLING_16;
    
17.   huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
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18.   huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
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19.   if (HAL_UART_Init(&huart1) != HAL_OK)
    
20.   {
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21.     Error_Handler();
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22.   }
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23.   //使能接收中断
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24.   HAL_UART_Receive_IT(&huart1,usart1_RxBuf_temp,1);          // Enable the USART1 Interrupt
    
25. }

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1. /**
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2.   * @brief This function handles USART1 global interrupt / USART1 wake-up interrupt through EXTI line 25.
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3.   */
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4. void USART1_IRQHandler(void)
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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. /**
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2.   * @brief  Rx Transfer completed callback
   
3.   * @param  UartHandle: UART handle
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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
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7.   */
   
8. void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
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9. {
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10.     if(UartHandle->Instance == USART1)
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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.     }
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15. }

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4.重定向输入输出，将输出重定向至printf
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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. {
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7.     ch=c;
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8. //    HAL_UART_Transmit_IT(&huart1,&ch,1);//发送串口
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9.     HAL_UART_Transmit(&huart1,&ch,1,100);//发送串口
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10.     return ch;
    
11. }
    
12. 
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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*/
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15. int fgetc(FILE * F)   
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16. {
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17.     HAL_UART_Receive_IT(&huart1,&ch_r,1);//接收
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18.     return ch_r;
    
19. }

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2 E' v+ T$ g. ^4 s5.main.c 主函数
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1. int main(void) //SLAVE
   
2. {
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3.     HAL_Init();
   
4.     /* Configure the system clock */
   
5.     SystemClock_Config();
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6.     MX_USART1_UART_Init();
   
7. 
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8.          while(1){
   
9.       DBG_print(DBG_DEBUG, " A.");
   
10.       HAL_Delay(100);
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11.     }
    
12. }

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