求助，关于中断，进入中断就死机

jackshi619

void EXTIX_Init(void)
{

  EXTI_InitTypeDef EXTI_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource12);
   EXTI_InitStructure.EXTI_Line = EXTI_Line12;
   EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
   EXTI_InitStructure.EXTI_LineCmd = ENABLE;
   EXTI_Init(&EXTI_InitStructure);
  
   NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);
}
void EXTI15_10IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line12) != RESET){
   EXTI_ClearITPendingBit(EXTI_Line12);
  }
}

jackshi619

        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

        GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_12;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
        GPIO_Init(GPIOA, &GPIO_InitStructure);