STM32_EXTI

#include "exti.h"
#include "led.h"
#include "key.h"
#include "delay.h"
#include "usart.h"

 
 
 
//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_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.5 中断线以及中断初始化配置
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource5);

    EXTI_InitStructure.EXTI_Line=EXTI_Line5;
    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

    //GPIOA.15      中断线以及中断初始化配置
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource15);

    EXTI_InitStructure.EXTI_Line=EXTI_Line15;
    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

    //GPIOA.0      中断线以及中断初始化配置
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);

    EXTI_InitStructure.EXTI_Line=EXTI_Line0;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;    
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
    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 = EXTI0_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1
    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

    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 = 0x00;                    //子优先级1
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                                //使能外部中断通道
    NVIC_Init(&NVIC_InitStructure); 
 
}

 
void EXTI0_IRQHandler(void)
{
  delay_ms(10);    //消抖
    if(WK_UP==1)
    {      
        LED0=!LED0;
        LED1=!LED1;    
    }
    EXTI_ClearITPendingBit(EXTI_Line0);  //清除EXTI0线路挂起位
}
 void EXTI9_5_IRQHandler(void)
{            
    delay_ms(10);   //消抖             
    if(KEY0==0)    {
        LED0=!LED0;
    }
      EXTI_ClearITPendingBit(EXTI_Line5);    //清除LINE5上的中断标志位  
}


void EXTI15_10_IRQHandler(void)
{
  delay_ms(10);    //消抖             
  if(KEY1==0)    {
        LED1=!LED1;
    }
     EXTI_ClearITPendingBit(EXTI_Line15);  //清除LINE15线路挂起位
}

#ifndef __EXTI_H
#define __EXIT_H     
#include "sys.h"
      
                            
     
void EXTIX_Init(void);//IO初始化
                                 
#endif