#ifndef __EXTI_H

#define __EXIT_H

#include "sys.h"

//////////////////////////////////////////////////////////////////////////////////

void EXTIX_Init(void);//外部中断初始化

#endif

#include "exti.h"

#include "led.h"

#include "key.h"

#include "delay.h"

#include "usart.h"

#include "beep.h"

//////////////////////////////////////////////////////////////////////////////////     

void EXTIX_Init(void)

{

     EXTI_InitTypeDef EXTI_InitStructure;

     NVIC_InitTypeDef NVIC_InitStructure;

    KEY_Init();     //    按键端口初始化

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);    //使能复用功能时钟

    //GPIOE.2 中断线以及中断初始化配置   下降沿触发

      GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource2);

      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

      NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;            //使能按键WK_UP所在的外部中断通道

      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;    //抢占优先级2，

      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;                    //子优先级3

      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                                //使能外部中断通道

      NVIC_Init(&NVIC_InitStructure); 

    NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;            //使能按键KEY2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);

      NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;            //使能按键KEY1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);        //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

    NVIC_InitStructure.NVIC_IRQChannel = EXTI4_IRQn;            //使能按键KEY0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0

      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

}

//外部中断0服务程序

void EXTI0_IRQHandler(void)

{

    delay_ms();//消抖

    if(WK_UP==)          //WK_UP按键

    {

        BEEP=!BEEP;

    }

    EXTI_ClearITPendingBit(EXTI_Line0); //清除LINE0上的中断标志位

}

//外部中断2服务程序

void EXTI2_IRQHandler(void)

{

    delay_ms();//消抖

    if(KEY2==)      //按键KEY2

    {

        LED0=!LED0;

    }

    EXTI_ClearITPendingBit(EXTI_Line2);  //清除LINE2上的中断标志位

}

//外部中断3服务程序

void EXTI3_IRQHandler(void)

{

    delay_ms();//消抖

    if(KEY1==)     //按键KEY1

    {

        LED1=!LED1;

    }

    EXTI_ClearITPendingBit(EXTI_Line3);  //清除LINE3上的中断标志位

}

void EXTI4_IRQHandler(void)

{

    delay_ms();//消抖

    if(KEY0==)     //按键KEY0

    {

        LED0=!LED0;

        LED1=!LED1;

    }

    EXTI_ClearITPendingBit(EXTI_Line4);  //清除LINE4上的中断标志位

}
 

#include "led.h"

#include "delay.h"

#include "key.h"

#include "sys.h"

#include "usart.h"

#include "exti.h"

#include "beep.h"

 int main(void)

 {        

    delay_init();             //延时函数初始化

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级

    uart_init();     //串口初始化为115200

     LED_Init();                  //初始化与LED连接的硬件接口

    BEEP_Init();             //初始化蜂鸣器端口

    KEY_Init();             //初始化与按键连接的硬件接口

    EXTIX_Init();             //外部中断初始化

    LED0=;                    //点亮LED0

    while()

    {

        printf("OK\r\n");

        delay_ms();

    }

 }