stm32f407 PD8 进不了外部中断

yu7622

void EXTIX_Init(void)
{

        GPIO_InitTypeDef  GPIO_InitStructure;
        NVIC_InitTypeDef   NVIC_InitStructure;
        EXTI_InitTypeDef   EXTI_InitStructure;
       
        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);

        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100M
        GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
        GPIO_Init(GPIOD, &GPIO_InitStructure);
       
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
       
        SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOD, EXTI_PinSource8);

    EXTI_InitStructure.EXTI_Line = EXTI_Line8;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);
       
        NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);
                          
}
void EXTI9_5_IRQHandler(void)
{
       
        EN_ADM3=0;
        SD_ADM3=1;
EXTI_ClearITPendingBit(EXTI_Line8);
}

问题出在哪呢

漫步xw

解决了，参考了网上的一个程序，一步步对下来。[mw_shl_code=applescript,true]
void EXTI9_5_IRQHandler(void)
{
        delay_ms(10);        //消抖

        if(EXTI_GetITStatus(EXTI_Line9) != RESET){
                LED0=!LED0;
        }
         EXTI_ClearITPendingBit(EXTI_Line9);//清除LINE2上的中断标志位

}
                 
                 
void EXTI15_10_IRQHandler(void)
{
        delay_ms(10);        //消抖

        if(EXTI_GetITStatus(EXTI_Line10) != RESET){
                LED1=!LED1;
        }
         EXTI_ClearITPendingBit(EXTI_Line10);//清除LINE2上的中断标志位  

}
//外部中断初始化程序
//初始化PE2~4,PA0为中断输入.
void EXTIX_Init(void)
{
        NVIC_InitTypeDef   NVIC_InitStructure;
        EXTI_InitTypeDef   EXTI_InitStructure;
       
        KEY_Init(); //按键对应的IO口初始化

        RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);//使能SYSCFG时钟
       
        SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource9);//PA0 连接到中断线0
        SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource10);//PA0 连接到中断线0
       
  /* 配置EXTI_Line0 */

        EXTI_ClearITPendingBit(EXTI_Line9);
  EXTI_InitStructure.EXTI_Line = EXTI_Line9;//LINE0
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//中断事件
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;//使能LINE0
  EXTI_Init(&EXTI_InitStructure);//配置
       
  EXTI_InitStructure.EXTI_Line = EXTI_Line10;//LINE0
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//中断事件
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; //上升沿触发
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;//使能LINE0
  EXTI_Init(&EXTI_InitStructure);//配置
//       
        /* 配置EXTI_Line2,3,4 */

        NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;//外部中断0
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;//抢占优先级0
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;//子优先级2
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
  NVIC_Init(&NVIC_InitStructure);//配置
        NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;//外部中断0
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;//抢占优先级0
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;//子优先级2
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能外部中断通道
  NVIC_Init(&NVIC_InitStructure);//配置
       
}
[/mw_shl_code]

正点原子

看起来没错，在中断服务函数里面，判断下中断标志，再做处理，试试

漫步xw

原子哥，我还是有这样的问题，在原0~4中断线有用的程序下修改到5~15中的任意一个中断线多次尝试，还是有这样的问题。无法进入中断。。

正点原子

漫步xw 发表于 2018-3-19 14:40
解决了，参考了网上的一个程序，一步步对下来。[mw_shl_code=applescript,true]
void EXTI9_5_IRQHandler( ...

谢谢分享