基于51单片机100天倒计时数码管显示(共阴) (附加时分秒显示)

基于51单片机100天倒计时数码管显示
（共阴）
（附加时分秒显示）
#include <reg51.h>
unsigned char s[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char e3,f3,g3,h3,count,flag0,flag2,flag3,flag4,j,a1,a2,a3,a4,b1,b2;
void delay(unsigned char i);
signed int time1=100,time0=59,time3=59,time4=23;
void sm();
void time2();
void hms1 ();
void timej ();
void timez ();
sbit ks=P1^4;
sbit hms=P1^5;
sbit add=P1^6;
sbit bat=P1^7;
void sm() //100天数码管显示
{
e3=time1/100;
f3=time1%100/10;
g3=time1%100%10;
P2=0x00;
P0=s[e3];
delay(2);
P2=0x01;
P0=s[f3];
delay(2);
P2=0x02;
P0=s[g3];
delay(2);
a1=time4%60/10; //时显示
a2=time4%60%10;
a3=time3%60/10; //分显示
a4=time3%60%10;
P2=0x03;
P0=s[a1];
delay(2);
P2=0x04;
delay(2);
P2=0x05;
P0=s[a3];
delay(2);
P2=0x06;
P0=s[a4];
delay(2);
b1=time0%60/10; 秒显示b2=time0%60%10;
P2=0x07;
P0=s[b1];
delay(2);
P2=0x08;
P0=s[b2];
delay(2);
}
void main()
{
TMOD=0x01;
TH0=0x3c;
TL0=0xb0;
EA=1;
ET0=1;
while(1)
{
sm();
time2();
hms1();
timej();
timez();
}
}
void time2() //计时开始{
if(ks==0)
{delay(10);}
if(ks==0)
{flag0=1;}
if(flag0==1&&ks==1)
TR0=1;
}
}
void hms1 () //按键变量j {
if (hms==0)
{delay (10);}
if(hms==0)
{flag2=1;}
if(flag2==1&&hms==1)
{ flag2=0;
j++;
TR0=0;
if (j==3) j=0;
}
}
void timez () //分按键减{
if (add==0)
{delay (10);}
if(add==0)
{flag4=1;}
if(flag4==1&&add==1)
{flag4=0;
switch(j)
{
case 0x00:break;
case 0x01:time3--; break;
case 0x02:time3=time3-10;break; default:break;
}}
}
void timej () //时按键减{
if (bat==0)
{delay (10);}
if(bat==0)
{flag3=1;}
if(flag3==1&&bat==1)
{flag3=0;
switch(j)
{
case 0x00:break;
case 0x01:time4--;break;
case 0x02:time4=time4-10;break;
default:break;
}
}
}
void int1()interrupt 1
{
count++;
if(count==16)
{
count=0;
time0--;
}
if(time0==-1) // 如果秒到了0等于59
{
time0=59;
time3--; //分自减
}
if(time3==-1)
{
time3=59;
time4--; //时自减
}
if(time4==-1)
{
time4=23;12点过后
time1--;//100天减
}
if(time1==-1)
{
time1=100;//到达100天恢复
}
}
void delay(unsigned char i )
{
unsigned char j,k;
for (k=0;k<i;k++)
for (j=0;j<10;j++);
}。