跑马灯中断程序.c

简单的跑马灯程序 经过测试可以成功运行在单片机上

#include<reg51.H> //按着中断键才回动

unsigned char P3State(void); 

void main(void)
{
	IT0=0;
	EX0=1;
	EA=1;
	while(1);
}

void Int0Demo(void) interrupt 0 using 2
{
	const unsigned char design[32]={0xFF,0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F,
										     0x7F,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0xFE,0xFF,
										     0xFF,0xFE,0xFC,0xF8,0xF0,0xE0,0xC0,0x80,0x0,
			                          0xE7,0xDB,0xBD,0x7E,0xFF};
						
	unsigned int a;
	unsigned char b=0;
	unsigned int Temp;
 
	do{
			if (~P3State()==0x04)
			{
				for(Temp=0;Temp<50;Temp++);
				P1=design[b];
				b++;
				if(b==32)
					b=0;
			}
			for(a=0;a<20000;a++);
		}while(1);
	
}

unsigned char P3State(void)
{
	unsigned char Temp;
	Temp=P3;
	return Temp;
}