t0定时中断.c

c语言程序

include <reg51.h>

//8字LED的连接方法
//P0.7	P.06	P0.5	P0.4	P0.3	P0.2	P0.1	P0.0
// H      G	 F	 E	 D	 C	 B 	 A

unsigned char code ledcode[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,	
			      0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};	//数码管段码表
unsigned char js100ms,jsgw,jssw,t0100ms,t0sm;

void time0(void);

void main(void)
{
	js100ms=0x00;
	jsgw=0x00;
	jssw=0x00;
	t0100ms=0x14;
	tosm=0x01;			//从第一个LED开始显示
	TH0=0xee;
	TL0=0x00;
	TMOD=0x01;
	TR0=1;
	while(1)
	{}	
}

void time0(void) interrupt 1
{
	TH0=0xee;
	TL0=0x00;
	to100ms--;
	if(t0100ms==0x00)
	{
		t0100ms=0x14;
		js100ms++;
		if(js100ms==0x0a)
		{
			js100ms-0x00;
			jsgw++;
			if(jsgw==0x0a)
			{
				jsgw=0x00;
				jssw++;
				if(jssw==0x0a)
				{jssw=0x00;}
			}
		}
	}
	t0sm++;
	if(t0sm==0x04)
	{t0sm=0x01;}
	P0=0xff;
	switch(t0sm)
	{
		case 0x01:	{ P2=0xdf;P0=ledcode[js100ms];}break;
		case 0x02:	{ P2=0xef;P0=ledcode[jsgw]&0x7f;}break;
		case 0x03:  { P2=0xf7;P0=ledcode[jssw];}break;
		default: 	break;
	}
}