基于51单片机数码管100天倒计时程序.doc

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1、基于51单片机数码管100天倒计时程序（动态显示）#includeUnsignedchars[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};unsignedchare3,f3,g3,h3,count,flag0,flag2,flag3,flag4,j;voiddelay(unsignedchari);signedinttime1=100,time0=0;voidsm();voidtime2();voidhms1();voidtimej();voidtimez();/*********************

2、**按键脚定义*//////////////////sbitks=P1^4;sbithms=P1^5;sbitadd=P1^6;sbitbat=P1^7;voidsm(){/****************************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;}voidmain(){T

3、MOD=0x01;TH0=0x3c;TL0=0xb0;EA=1;ET0=1;while(1){sm();time2();hms1();timej();timez();}}voidtime2()//计时开始{if(ks==0){delay(10);}if(ks==0){flag0=1;}if(flag0==1&&ks==1){flag0=0;TR0=1;}}voidhms1()//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

4、timez()//按键加{if(add==0){delay(10);}if(add==0){flag4=1;}if(flag4==1&&add==1){flag4=0;switch(j){case0x00:break;case0x01:time1++;break;case0x02:time1=time1+10;break;default:break;}}}voidtimej()//按键减{if(bat==0){delay(10);}if(bat==0){flag3=1;}if(flag3==1&&bat==1){flag3=0;switch(j){case0x00:break;case

5、0x01:time1--;break;case0x02:time1=time1-10;break;default:break;}}}voidint1()interrupt1{count++;if(count==12){count=0;time0++;}if(time0==8640){time1--;time0=0;}if(time1==-1){time1=100;}}voiddelay(unsignedchari){unsignedcharj,k;for(k=0;k