//管脚定义
#define EXT_INT0 2 //PD2 按键0
#define EXT_INT1 3 //PD3 按键1
#define EXT_INT2 2 //PB2 按键2
#define LED0 0 //PB0
#define LED1 1 //PB1
#define LED2 3 //PB3
//宏定义
#define LED0_ON() PORTB|= (1<<LED0) //输出高电平，灯亮
#define LED0_OFF() PORTB&=~(1<<LED0) //输出低电平，灯灭
#define LED1_ON() PORTB|= (1<<LED1)
#define LED1_OFF() PORTB&=~(1<<LED1)
#define LED2_ON() PORTB|= (1<<LED2)
#define LED2_OFF() PORTB&=~(1<<LED2)
这样看吧
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楼主
