51单片机设计数码管显示时钟的程序怎么写

#include<reg51.h>

#define uchar unsigned char

uchar code ledtab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}//0-9

unsigned char sec=0,min=0,hour=12,scanled

unsigned char key,flashbit,mode,time 

unsigned char disdat[8]

sbit led=P1^0

void delay(unsigned int x)

{

unsigned int i,j

for(i=0i<xi++)

for(j=0j<120j++)

}

void dischg()

{

disdat[0]=sec%10

disdat[1]=sec/10

disdat[2]=10

disdat[3]=min%10

disdat[4]=min/10

disdat[5]=10

disdat[6]=hour%10

disdat[7]=hour/10

}

void flash()

{

switch(flashbit)

{

case 0:break

case 1:

disdat[6]=0x10

disdat[7]=0x10

delay(50)

dischg()

delay(80)

break

case 2:

disdat[3]=0x10

disdat[4]=0x10

delay(50)

dischg()

delay(80)

break

case 3:

disdat[0]=0x10

disdat[1]=0x10

delay(50)

dischg()

delay(80)

break

default:break

}

}

void t0isr() interrupt 1 //秒计时

{

TH0=0x3c

TL0=0xb0

time++

switch(mode)

{

case 0:

if(time==20)

{

time=0

sec++

if(sec>59)

{

sec=0

min++

if(min>59)

{

min=0

hour++

if(hour>23)hour=0

}

}

}

break

case 1:

if(time==20)

{

time=0

if(sec>0)sec--

else if(min>0){sec=59min--}

else if(hour>0){sec=59min=59hour--}

else {hour=0min=0sec=0}

}

break

}

dischg()

}

void t1isr() interrupt 3 //显示

{

TH1=0xec

TL1=0x78

switch(scanled)

{

case 0:

P2=0x01

P0=~ledtab[disdat[7]]

break

case 1:

P2=0x02

P0=~ledtab[disdat[6]]

break

case 2:

P2=0x04

P0=~ledtab[disdat[5]]

break

case 3:

P2=0x08

P0=~ledtab[disdat[4]]

break

case 4:

P2=0x10

P0=~ledtab[disdat[3]]

break

case 5:

P2=0x20

P0=~ledtab[disdat[2]]

break

case 6:

P2=0x40

P0=~ledtab[disdat[1]]

break

case 7:

P2=0x80

P0=~ledtab[disdat[0]]

break

default:break

}

scanled++

scanled%=8

}

main()

{

TMOD=0x11

TH0=0x3c

TL0=0xb0

TH1=0xec

TL1=0x78

TR1=1

TR0=1

ET0=1

ET1=1

EA=1

sec=55

min=59

hour=23

flashbit=0

scanled=0

time=0

mode=0

dischg()

while(1)

{

flash()//闪烁

if((P3&0x0f)!=0x0f){

key=P3&0x0f

while((P3&0x0f)!=0x0f)

led=0

delay(10)

key|=0xf0

switch(~key)

{

case 0x01: //p3.1选择调时、分、秒

TR0=0

flashbit+=1

if(flashbit>3){flashbit=0TR0=1}

break

case 0x02: //p3.2调数

if(flashbit==0)break

if(flashbit==1)

{

hour++

if(hour>99)hour=0

}

if(flashbit==2)

{

min++

if(min>59)min=0

}

if(flashbit==3)

{

sec++

if(sec>59)sec=0

}

break

case 0x04:  //选择正/倒

TR0=0

mode++

mode&=0x01

if(mode==0){sec=0min=0hour=0}

dischg()

break

case 0x08: //启动/暂停

TR0=~TR0

break

default:break

}

}

}

}

这个是简单的数码管时钟显示如果有需要，我写过比较完善的1602显示时钟.显示控制年月日等等.#include<reg51.h>

sbit Begin=P2^0

sbit Hour=P2^1

sbit Mus=P2^2

sbit End=P2^3

unsigned char code Tab[]={ 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,

0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x40}

unsigned char code num[]={ 0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}

unsigned char Time[]={0,0,16,0,0,16,0,0}

unsigned char a

unsigned int x,m,th

void init()

{

TMOD=0x01

TH0=(65535/50000)/256

TL0=(65535/50000)%256

EA=1

ET0=1

TR0=1

}

void delay(unsigned int z)

{

unsigned int x,y

for(x=zx>0x--)

for(y=110y>0y--)

}

unsigned char keyboard()

{

if(Begin==0){

delay(5)

if(Begin==0)

return 1

}

if(Hour==0){

delay(30)

if(Hour==0)

return 2

}

if(Mus==0)

return 3

if(End==0)

return 4

}

void display()

{

unsigned char i for(i=0i<8i++)

{

P3=num[i]

P0=Tab[Time[i]]

delay(5)

}

}

void main()

{

unsigned char Key

init()

Key=keyboard()

if(Key==1)

{

while(1){

Key=keyboard()

display()

if(Key==2)

x+=3600

if(Key==3)

x+=1

if(Key==4)

return

}

}}

void holes() interrupt 1 using 2

{

TH0=(65535/50000)/256

TL0=(65535/50000)%256

a++

if(a>=20)

{

x++

m=x

th=m/3600//设置小时

Time[0]=th/10

Time[1]=th%10

m=m%3600 Time[2]=16 th=m/60//设置分钟

Time[3]=th/10

Time[4]=th%10

m=m%60 Time[5]=16 th=m//设置秒

Time[6]=th/10

Time[7]=th%10 a=0

}

}

#include "reg52.h"

#define uint unsigned int

#define uchar unsigned char

uchar code tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}

uchar shi,fen,miao

uchar time

void delay(uint x)

{

uint y

for(x>0x--)

{

for(y=0y<124y++)

}

}

void display(uchar shi,uchar fen,uchar miao)

{

P2=0 //位码

P0=(tab[shi/10]) //段码

delay(2)

P2=1

P0=(tab[shi%10])

delay(2)

P2=2 //位码

P0=0x40 //段码

delay(2)

P2=3 //位码

P0=(tab[fen/10]) //段码

delay(2)

P2=4

P0=(tab[fen%10])

delay(2)

P2=5 //位码

P0=0x40 //段码

delay(2)

P2=6 //位码

P0=(tab[miao/10]) //段码

delay(2)

P2=7

P0=(tab[miao%10])

delay(2)

}

void main()

{

TMOD=0x01

TH0=(65536-50000)/256

TL0=(65536-50000)%256

EA=1

ET0=1

TR0=1

while(1)

{

if(time==20)

{

time=0

miao++

if(miao==60)

{

miao=0

fen++

if(fen==60)

{

fen=0

shi++

if(shi==24)

shi=0

}

}

}

display(shi,fen,miao)

}

}

void timer0() interrupt 1

{

TH0=(65536-50000)/256

TL0=(65536-50000)%256

time++

}

/*还有什么不明白继续追加*/

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