stm32外部中断的配置

ti饭饭

//PA11上拉输入
void GPIO_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable , ENABLE);
    GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_11 ;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/* PA11外部中断，下降沿触发 */
void EXTI_Configuration(void)
{
   EXTI_InitTypeDef EXTI_InitStructure;
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource11);
   EXTI_InitStructure.EXTI_Line = EXTI_Line11;
   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;                          //中断使能 
   EXTI_Init(&EXTI_InitStructure);                                           //中断初始化  
//   EXTI_GenerateSWInterrupt(EXTI_Line11);                         //exti_line10软件自动触发允许 
}
//外部中断10分组
//抢占优先级 2
//子优先级    2
void NVIC_Configuration(void)
{
      NVIC_InitTypeDef NVIC_InitStructure;
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
      NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQChannel;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);
}
//中断函数
void EXTI15_10_IRQHandler(void)
{
     if(EXTI_GetITStatus(EXTI_Line11)!= RESET) //判断中断标志是否置位
     {     
     }
     EXTI_ClearITPendingBit(EXTI_Line11);         //清除中断标志
}
//程序经测试，能正常运行

正点原子

谢谢分享。