使用迷你开发板的PC11引脚作为外部中断失败，是不是由于该中断的优先级低于按键的或者是代码问题，所以无法触发？求助各位大佬

杨志1314 · 发表于 2018-5-9 09:12:12

/****  EXTI Control ****/
void EXTI_GPIO_Init(void);
#define Change_Flag 1
#define RCC_TOUCHOUT                      RCC_APB2Periph_GPIOC
#define TOUCHOUT_PORT                      GPIOC
#define TOUCHOUT_PINS                      GPIO_Pin_11


#define TouchOut()                         GPIO_ReadInputDataBit(TOUCHOUT_PORT,TOUCHOUT_PINS)

void EXTI_GPIO_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_TOUCHOUT|RCC_APB2Periph_AFIO, ENABLE);//打开GPIO AFIO的时钟
GPIO_InitStructure.GPIO_Pin = TOUCHOUT_PINS;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
      GPIO_Init(TOUCHOUT_PORT, &GPIO_InitStructure);

EXTI_ClearITPendingBit(EXTI_Line11);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource11);//PC11  为GPIOC的PIN11
EXTI_InitStructure.EXTI_Line= EXTI_Line11; //PC11,为:EXTI_Line11
EXTI_InitStructure.EXTI_Mode= EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger= EXTI_Trigger_Rising_Falling; //中断方式为上升与下降沿
EXTI_InitStructure.EXTI_LineCmd=ENABLE;
EXTI_Init(&EXTI_InitStructure);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); //NVIC
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority= 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority= 2;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

int EXTI15_10_IRQHandler(void)       //这里为:EXTI15_10 （外部中断号为10~15都在这里实现)
{
if(EXTI_GetITStatus(EXTI_Line11) != RESET) //判断相应的中断号是否进入中断，如果有多个中断的话
  {
      EXTI_ClearITPendingBit(EXTI_Line11);    //清中断
      if(Change_Flag!=TouchOut())
            {
               return 1;
            }

  }
   return 0;
}

if(EXTI15_10_IRQHandler() == 1)
      {
            sprintf((char*)p,"ATK-8266发送数据02d\r\n",t/10);
            Show_Str(15+54,125,200,12,p,12,0);
            atk_8266_send_cmd("AT+CIPSEND=0,25","OK",200);
            delay_ms(200);
            atk_8266_send_data(p,"OK",100);
            timex=100;
      }