自己用单片机数码管做的秒表

基于51hei单片机电路图可从官网去下载，p1为位选 p0为段选 /* 实现功能，前五位计数，显示时间的变化，误差1/1000s */ #include<reg52.h> #include<intrins.h> #define uint unsigned int #define uchar unsigned char uchar code wetable[]={ 0xfe,0xfd,0xfb,0xf7, 0xef,0xdf,0xbf,0x7f};

uchar code dutable[]={ 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71};//段选

uint closedu,closewe; uint ge,shi,bai,num; uchar wenum,count; uchar doucount,dounum,doufirst,dousecond; uchar decimal;

void delay(uint z);

void init();

void display(uint bai,uint shi,uint ge,uint doufrist,uint dousecond);

void main() { init(); while(1) { display(bai,shi,ge,doufirst,dousecond); } }

void init() { num=0; dounum=0; doucount=0; decimal=0x80; count=0; wenum=0; closedu=0xff; closewe=0xff; P1=closewe;//关闭位选 P0=closedu;//关闭段选 TMOD=0x01; TH0=(65536-10000)/256; TL0=(65536-10000)%256; EA=1; ET0=1; TR0=1; }

void delay(uint z)//延时1ms { uint x,y; for(x=z;x>0;x--) { for(y=0;y<11;y++) { } } }

void display(uint bai,uint shi,uint ge,uint doufrist,uint dousecond) { closedu=0xff; closewe=0xff; wenum=0; P1=wetable[wenum]; P0=dutable[bai]; delay(1); P1=closewe; P0=closedu; wenum++; P1=wetable[wenum]; P0=dutable[shi]; delay(1); P1=closewe; P0=closedu; wenum++; P1=wetable[wenum]; P0=dutable[ge]; delay(1); P1=closewe; P0=closedu; P1=wetable[wenum]; P0=decimal; delay(1); P1=closewe; P0=closedu; wenum++; P1=wetable[wenum]; P0=dutable[doufirst]; delay(1); wenum++; P1=wetable[wenum]; P0=dutable[dousecond]; delay(1); wenum=0; } void time0() interrupt 1 { TH0=(65536-10000)/256; TL0=(65536-10000)%256; count++; doucount++; if(count==100) { count=0; num++; if(num==1000) { num=0; } bai=num/100; shi=num%100/10; ge=num%10; } if(doucount==1) { doucount=0; dounum++; if(dounum==100) { dounum=0; } doufirst=dounum/10; dousecond=dounum%10; } }

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