中断问题

只看该作者 · 2015-8-14 09:28

T_Usart1_Config(9600);
EXTIX_Init();

  main()
{
  while(1)
  {
Delay_us(500);
GPIO_ResetBits(GPIOE,GPIO_Pin_12);
Delay_us(500);
GPIO_SetBits(GPIOE,GPIO_Pin_12);
  }
}

void EXTI3_IRQHandler(void)
{
T_Sendschar(USART1,0xaa);//进中断就发AA
if(EXTI_GetITStatus(EXTI_Line3) != RESET)
{

}
EXTI_ClearITPendingBit(EXTI_Line3);

}

//中断线3
void EXTIX_Init(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* 开启AFIO的时钟 */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
//GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource9);
EXTI_InitStructure.EXTI_Line = EXTI_Line3;    //中断线
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;    //中断模式
   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;  //下降沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

/* 软件中断3号线*/
NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;    //使能按键所在的外部中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级为1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;    //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

。
复位后啥都不干串口一直发出AA

只看该作者 · 2015-8-14 09:31

灯正常闪烁

只看该作者 · 2015-8-14 09:40

void EXTI3_IRQHandler(void)
{

if(EXTI_GetITStatus(EXTI_Line3) != RESET)
{
   T_Sendschar(USART1,0xaa);//进中断就发AA
}
      EXTI_ClearITPendingBit(EXTI_Line3);

}
这样也一直发送AA ，根本没有触发中断，我都没有接到引脚上。