基于51单片机数码管100天倒计时程序

基于51单片机数码管100天倒计时程序

（动态显示）

#include

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;

void delay(unsigned char i);

signed int time1=100,time0=0;

void sm();

void time2();

void hms1 ();

void timej ();

void timez ();

/***********************按键脚定义*//////////////////

sbit ks=P1^4;

sbit hms=P1^5;

sbit add=P1^6;

sbit bat=P1^7;

void sm()

{

/****************************数码管显示位*/////////////////////// e3=time1/100;

f3=time1%100/10;

g3=time1%100%10;

P2=0x01;

P0=s[f3];

delay(2);

P0=0;

P2=0x02;

P0=s[g3];

delay(2);

P0=0;

P2=0x04;

P0=s[e3];

delay(2);

P0=0;

}

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)

{flag0=0;

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 () //按键加{

if (add==0)

{delay (10);}

if(add==0)

{flag4=1;}

if(flag4==1&&add==1)

{flag4=0;

switch(j)

{

case 0x00:break;

case 0x01:time1++; break;

case 0x02:time1=time1+10;break; default:break;

}}

}

void timej () //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:time1--;break;

case 0x02:time1=time1-10;break;

default:break;

}

}

}

void int1()interrupt 1 {

count++;

if(count==12)

{

count=0;

time0++;

}

if(time0==8640)

{

time1--;

time0=0;

}

if(time1==-1)

{

time1=100;

}

}

void delay(unsigned char i ) {

unsigned char j,k;

for (k=0;k

for (j=0;j<10;j++);

}