【单片机】CH32V103串口IDLE空闲中断

CH32V103c8t6 在寻找解决接收完数据后，怎么即时判断数据已经完成了接收。发现串口有一个IDLE空闲中断。如下图描述：

意思是在串口接收完一帧数据会产生一个中断，此时程序可判断为数据已接收完毕。

测试例程如下：

一、串口初始化：

void User_USART_Init(uint32_t baudrate)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  USART_InitTypeDef USART_InitStructure;

  NVIC_InitTypeDef  NVIC_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

  /* USART2 TX-->A.2   RX-->A.3 */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

  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(USART2, &USART_InitStructure);

  /*打开串口中断*/

  USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

  /*打开IDLE数据检测中断*/

  USART_ITConfig(USART2, USART_IT_IDLE, ENABLE);

  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

  USART_Cmd(USART2, ENABLE);

  USART_SetAddress(USART2, 0x1);

}

　二、串口中断程序

/*idle 数据检测中断测试*/

void USART2_IRQHandler(void)

{

    uint16_t Clear = Clear;

    /*如果接收到一个字节*/

    if(USART_GetITStatus(USART2,USART_IT_RXNE)!= RESET)

    {

        USART_RX_BUF[RxCounter++]= USART_ReceiveData(USART2);

    }

    /*如果接收到一帧数据*/

    else if(USART_GetITStatus(USART2, USART_IT_IDLE)!= RESET)

    {

        Clear = USART2->STATR;

        Clear = USART2->DATAR;

        strcpy(UsartData,USART_RX_BUF);

        /*清空串口接收数组*/

        memset(USART_RX_BUF, 0, sizeof (USART_RX_BUF));

　　　　　/*重置接收数组指针*/

        RxCounter = 0;

        USART_RX_STA = 1;

    }

}

　三、测试接收效果：将收到数据原路发回

	    if(USART_RX_STA == 1)

	    {

	        USART_Send_String(USART2,UsartData);

	        memset(UsartData, 0, sizeof (UsartData));

	        USART_RX_STA = 0;

	    }

巴特西

【单片机】CH32V103串口IDLE空闲中断

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