又一定时器中断.c

LED显示,流水灯,定时器,可用于单片机课程设计

#include <reg51.h>
#define uchar unsigned char
uchar j,k,m=500;
sbit beep=P2^0;
uchar disp[]={0xc0,0xf9,0xa4,0Xb0,0x99,0x92,};
void delay(uchar x)
{uchar y;
for(;x>0;--x)for(y=0;y<250;y++){;}}
void Timer0() interrupt 1 using 3
{ TH0=0xb1;TL0=0xe0;
   if(!(m--)) {beep=0; delay(500); beep=1;
                for(k=0;k<=5;k++) 
                 {P2=0x7f;P0=disp[k]; delay(200);}
                 m=500;P2=0xff;
                P1=j; }}
void main()
{uchar i; TMOD=0x01; TH0=0xb1;TL0=0xe0;
ET0=1; TR0=1; EA=1;i=0xfe; P2=0x03;P0=0xff;
while(1)
{ P1=i; j=i; i<<=1;i++; if(i==0xff)i=0xfe;delay(5000);}
}