#include <wiringPi.h>
#include <stdio.h>  

#define  LED_B 0   // 蓝色LED
#define  LED_G 2   // 绿色LED
#define  LED_R 3   // 红色LED

// 中断引脚
#define  btn_mid_pin 21 
#define  btn_left_pin 22
#define  btn_right_pin 23 
#define  btn_up_pin 24
#define  btn_down_pin 25
#define  btn_set_pin 26 
#define  btn_rst_pin 27


// 中断标志位 发生中断就置1
int pause = 0;
// 中断发生就会执行这个函数
void play(void){
    if(pause == 1) {
        pause = 0;
        printf("play......");
    } else {
        printf("pause......");
        pause = 1;
    }
}
void next(void){
    printf("next......")
}
void prev(void){
    printf("prev......")
}
void vol_up(void){
    printf("vol_up......")
}
void vol_down(void){
    printf("vol_down......")
}
void set_event(void){
    printf("set_event......")
}
void rst_event(void){
    printf("rst_event......")
}

int main (void)
{
    wiringPiSetup();
    pinMode(LED_R, OUTPUT);

    pinMode(btn_mid_pin, INPUT);
    pinMode(btn_left_pin, INPUT);
    pinMode(btn_right_pin, INPUT);
    pinMode(btn_up_pin, INPUT);
    pinMode(btn_down_pin, INPUT);
    pinMode(btn_set_pin, INPUT);
    pinMode(btn_rst_pin, INPUT);

    // 这个很重要，把中断引脚设置成上拉输入
    pullUpDnControl (btn_mid_pin, PUD_UP); 
    pullUpDnControl (btn_left_pin, PUD_UP); 
    pullUpDnControl (btn_right_pin, PUD_UP); 
    pullUpDnControl (btn_up_pin, PUD_UP); 
    pullUpDnControl (btn_down_pin, PUD_UP); 
    pullUpDnControl (btn_set_pin, PUD_UP); 
    pullUpDnControl (btn_rst_pin, PUD_UP); 

    delay(100);

    wiringPiISR(btn_mid_pin,INT_EDGE_FALLING,&play);
    wiringPiISR(btn_left_pin,INT_EDGE_FALLING,&prev);
    wiringPiISR(btn_right_pin,INT_EDGE_FALLING,&next);
    wiringPiISR(btn_up_pin,INT_EDGE_FALLING,&vol_up);
    wiringPiISR(btn_down_pin,INT_EDGE_FALLING,&vol_down);
    wiringPiISR(btn_set_pin,INT_EDGE_FALLING,&set_event);
    wiringPiISR(btn_rst_pin,INT_EDGE_FALLING,&rst_event);

    // while(1){
    //     if(flag == 1){
    //         delay(20); // 延时 按键销抖
    //         if(flag == 1){
    //             flag = 0; // 重置标志位
    //             // LED 闪烁
    //             digitalWrite(LED_R,HIGH);
    //             delay(100);
    //             digitalWrite(LED_R,LOW);
    //         }
    //     }
    // }

	return 0;
}