CH32V307尝试1--串口IDLE中断调试

　　在CH32V307的官方例程中，给出了printf函数，默认使用串口1 进行打印，但官方未给出串口接收函数。按照以前编程习惯，串口需能接收任意长度的数据，且不能规定传输数据中必须有结束字符。因此考虑使用IDLE中断接收。编写时参考了以下博客：https://blog.csdn.net/weixin_43150094/article/details/113823073。此博客内容为STM32的串口中断编写，对于实际代码徐做少量改动。

 

修改详情：1、定义修改：在debug.c中添加以下定义：

uint8_t U1_RxBuffer[64]={0};//接收缓存

uint8_t U1_RxCounter=0;//

void USART1_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));//定义中断，CH32V307不像stm32，直接使用即可，在CH32V307中需自己定义。

 

2、修改初始化函数：

void USART_Printf_Init(uint32_t baudrate)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  USART_InitTypeDef USART_InitStructure;

  NVIC_InitTypeDef  NVIC_InitStructure = {0};

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

  USART_InitStructure.USART_BaudRate = baudrate;

  USART_InitStructure.USART_WordLength = USART_WordLength_8b;

  USART_InitStructure.USART_StopBits = USART_StopBits_1;

  USART_InitStructure.USART_Parity = USART_Parity_No;

  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

  USART_InitStructure.USART_Mode = USART_Mode_Tx|USART_Mode_Rx;

  USART_Init(USART1, &USART_InitStructure);

//---------------------------------------------------------------------------------------------------------------------------------

//自己添加部分

  USART_ITConfig(USART1,USART_IT_IDLE, ENABLE);

  USART_ITConfig(USART1,USART_IT_RXNE, ENABLE);

  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

//---------------------------------------------------------------------------------------------------------------------------------

  USART_Cmd(USART1, ENABLE);

}

 

3、编写中断服务函数

void USART1_IRQHandler(void)

{

    uint8_t clear=clear;

    if(USART_GetITStatus(USART1,USART_IT_RXNE)!=RESET)

    {

        U1_RxBuffer[U1_RxCounter++]=USART_ReceiveData(USART1);

    }else if(USART_GetITStatus(USART1,USART_IT_IDLE)!=RESET)

    {

        clear=USART_ReceiveData(USART1);

//---------------------------------------------------------------------------------------------------------------------------------

//用户处理

        printf("get data=%d:%s\r\n",U1_RxCounter,U1_RxBuffer);

//---------------------------------------------------------------------------------------------------------------------------------

        U1_RxCounter=0;

    }

}

 

补充说明：

1、在中断服务函数中没有对中断标志进行清除，由系统自动清除，

原因如下：

 

 

2、注意读取中断标志的顺序