STM32F103RCT6外部中断求助

Sunshinegeek · 发表于 2019-4-22 10:59:50

程序现象是8个按键都可以响一遍  但全部按过一遍后  只有UP键  还能响；单步调试是发现只在中断15_10处理函数中来回扫描中断9_5函数一次都不扫描  也不会触发。求大佬说说我哪里出问题了。

//外部中断初始化函数
void EXTIX_Init(void)
{

   EXTI_InitTypeDef EXTI_InitStructure;
   NVIC_InitTypeDef NVIC_InitStructure;

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC,ENABLE);//使能PORTB,PORTC时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);//外部中断，需要使能AFIO时钟

   KEY_Init();//初始化按键对应io模式

//GPIOC.6 GPIOC.7 GPIOC.8 GPIOC.9 中断线以及中断初始化配置
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource6|GPIO_PinSource7|GPIO_PinSource8|GPIO_PinSource9);

    EXTI_InitStructure.EXTI_Line=EXTI_Line6|EXTI_Line7|EXTI_Line8|EXTI_Line9;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;//下降沿触发
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);      //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

//GPIOB.12 GPIOB.13 GPIOB.14 GPIOB.15 中断线以及中断初始化配置
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource12|GPIO_PinSource13|GPIO_PinSource14|GPIO_PinSource15);

    EXTI_InitStructure.EXTI_Line=EXTI_Line12|EXTI_Line13|EXTI_Line14|EXTI_Line15;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);    //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;       //使能按键所在的外部中断通道
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2，
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01; //子优先级1
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
    NVIC_Init(&NVIC_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;          //使能按键所在的外部中断通道
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //抢占优先级2
    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);       //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

}

void EXTI9_5_IRQHandler(void)    //中断处理函数
{
delay_ms(10); //消抖
if(F2==0)
{Beepalarm();EXTI_ClearITPendingBit(EXTI_Line8);} //清除LINE5上的中断标志位

if(DOWN==0)
{Beepalarm();EXTI_ClearITPendingBit(EXTI_Line6);} //清除LINE5上的中断标志位

if(Right==0)
{Beepalarm();EXTI_ClearITPendingBit(EXTI_Line7);} //清除LINE5上的中断标志位

if(ESC==0)
{Beepalarm();EXTI_ClearITPendingBit(EXTI_Line9);} //清除LINE5上的中断标志位
}

void EXTI15_10_IRQHandler(void)
{
  delay_ms(10); //消抖
  if(MENU==0){Beepalarm();EXTI_ClearITPendingBit(EXTI_Line12); } //清除LINE12线路挂起位

  if(F1 ==0){Beepalarm();EXTI_ClearITPendingBit(EXTI_Line13);}  //清除LINE12线路挂起位

  if(Left==0){Beepalarm();EXTI_ClearITPendingBit(EXTI_Line14);}  //清除LINE12线路挂起位

  if(UP ==0){Beepalarm(); EXTI_ClearITPendingBit(EXTI_Line15);}  //清除LINE12线路挂起位

}

1208 · 发表于 2019-4-22 10:59:51

本帖最后由 1208 于 2019-4-22 12:32 编辑

你参照这种模式试下
EXTI_InitStructure.EXTI_Line=EXTI_Line2; //KEY2
   EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
   EXTI_InitStructure.EXTI_LineCmd = ENABLE;
   EXTI_Init(&EXTI_InitStructure);       //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

//GPIOE.3    中断线以及中断初始化配置下降沿触发 //KEY1
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource3);
   EXTI_InitStructure.EXTI_Line=EXTI_Line3;
   EXTI_Init(&EXTI_InitStructure);       //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

//GPIOE.4    中断线以及中断初始化配置  下降沿触发 //KEY0
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource4);
   EXTI_InitStructure.EXTI_Line=EXTI_Line4;
   EXTI_Init(&EXTI_InitStructure);       //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

//GPIOA.0    中断线以及中断初始化配置上升沿触发 PA0  WK_UP
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);

   EXTI_InitStructure.EXTI_Line=EXTI_Line0;
   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
   EXTI_Init(&EXTI_InitStructure);       //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器