stm32一有外部中断就卡住了

jiajia1990 · 发表于 2016-3-14 08:23:51

STM32F207设置的PA12外部中断，配置没有什么问题，但一有中断就卡住了
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;          //上拉输入
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource12);//配置中断线
EXTI_InitStructure.EXTI_Line = EXTI_Line12;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

一有中断就卡住，调试停止后，卡在了
               B    .

            ENDP

            ALIGN

jiajia1990 · 发表于 2016-3-14 08:27:25

还有
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//先占优先级
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;//从优先级
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
void EXTI15_10_IRQHander(void)
{
if(EXTI_GetITStatus(EXTI_Line12)!= RESET)
{
if(!GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_12))
{
wirelessflag=1;
}
EXTI_ClearITPendingBit(EXTI_Line12);    //清除中断标志位
}
}
该配置的都配置了