(完整word版)基于51单片机共阴两位数码管显示倒计时.doc

基于51单片机共阴两位数码管显示倒计时
#include<reg51.h>
unsignedchars[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsignedcharcount,d1,d2,g,y;
signedinttime=10;
voiddelay(unsignedchari);
voidsm()
{
d1=time/10;
d2=time%10;

P1=s[d1];
P3=0x00;
delay(2);

P3=0x01;
P1=s[d2];
delay(2);
}
voidmain()
{
TMOD=0x01;
TH0=0x3c;
TL0=0xb0;
EA=1;
ET0=1;
TR0=1;
while(1)
{
sm();
}
}
voidint1()interrupt1
{
count++;
if(count==20)
{
count=0;
time--;

}
if(time==-1)
{
time=g;
g=3;
y++;
}
if(y==2)
{
y=0;
g=10;
}

}
voiddelay(unsignedchari)
{
unsignedcharj,k;
for(k=0;k<i;k++)
for(j=0;j<10;j++);
}