stm32F103RCT6 串口4不进接收中断

只看该作者 · 2015-8-10 10:02

我用5个串口，串口1.2.3、5 都可以正常进入中断，而串口4接收中断进不去，实在找不出问题，请大家帮忙
串口4 配置串口

********************************************************************/
void UART4_Init(void)
{
   USART_InitTypeDef USART_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC |RCC_APB2Periph_AFIO, ENABLE);  //使能UART5所在GPIOC的时钟
//使能串口1时钟
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4,ENABLE);
//******************************************************************************
//  串口1所使用管脚输出输入定义
//******************************************************************************
  // 定义UART4 TX (Pc10)脚为复用推挽输出
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //tx  pb10
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;  //
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //IO口复用推挽输出
  GPIO_Init(GPIOC,&GPIO_InitStructure);
  // 定义 USART143Rx (Pc.11)为悬空输入
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;    //IO口的第十脚
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //IO口悬空输入
  GPIO_Init(GPIOC,&GPIO_InitStructure);    //初始化串口3输入IO口
  //*********************************************
// 串口1参数初始化定义部分,串口4参数为19200 ， 8 ，1 ，N  接收中断方式
//******************************************************************************

  USART_InitStructure.USART_BaudRate = 19200;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b; //设定传输数据位数
  USART_InitStructure.USART_StopBits = USART_StopBits_1;//设定停止位个数
  USART_InitStructure.USART_Parity = USART_Parity_No; //无校验
  USART_InitStructure.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;  //使用接收和发送功能
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //不用控制流量

  USART_Init(UART4, &USART_InitStructure); //配置串口参数函数

  USART_ITConfig(UART4,USART_IT_RXNE,ENABLE); //接收使能
  USART_ITConfig(UART4,USART_IT_TC,ENABLE);
  USART_Cmd(UART4,ENABLE);                   //使能串口4
  USART_ClearFlag(UART4,USART_FLAG_TC);    // 清除中断标志

  NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;//Channel; USART1_IRQn
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority =0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void UART4_IRQHandler(void)
{
u8 i;
if(USART_GetITStatus(UART4,USART_IT_RXNE) != RESET)
{
i = USART_ReceiveData(UART4);
USART_ClearITPendingBit(UART4,USART_IT_RXNE);
cReceiveBuffer4[ReceiveLength4] = i;
TimerOfCom4Delay = 10;
if(ReceiveLength4 <BufferSize)
ReceiveLength4++;
else
ReceiveLength4 = 0;
}
if(USART_GetITStatus(UART4,USART_IT_TC) !=RESET)
{
USART_ClearFlag(UART4,USART_FLAG_TC);

}
}
谢谢！