用AT89C51单片机控制LED数码管能够显示时间和日期，求电路图和程序代码

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相关建议推荐于2018-05-09

这是一个朋友做的，你可以参考一下：

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit db=P2^7;
char i,sec,min,h,date,month,year,flag;
uchar j,k,m,n,o,p;
sbit dula=P2^0;
sbit wela1=P2^1;
sbit wela2=P2^2;
sbit key_ch=P3^5;
sbit key_add=P3^6;
sbit key_minus=P3^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void init();
void delay(uint);
void second_display();
void minute_display();
void hour_display();
void date_display();
void month_display();
void year_display();
void control();
void time();
void main()
{
init();
while(1)
{
  second_display();
  minute_display();
  hour_display();
  date_display();
  month_display();
  year_display();
  control();
}
}
void init()
{
db=0;
i=0;
sec=0;
min=0;
h=0;
date=1;
month=1;
year=1;
flag=0;
wela1=0;
wela2=0;
EA=1;
ET0=1;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TR0=1;
}
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
  for(y=110;y>0;y--);
}
void second_display()
{
int sec_shi,sec_ge;
sec_shi=sec/10;
sec_ge=sec%10;

if(flag==1&&j!=1)
  j++;
else
{
  j=0;
  dula=1;
  P0=~table[sec_ge];
  dula=0;
  wela1=1;
  P1=0x00;
  wela1=0;
  wela2=1;
  P1=0x20;
  wela2=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;

  dula=1;
  P0=~table[sec_shi];
  dula=0;
  wela1=1;
  P1=0x00;
  wela1=0;
  wela2=1;
  P1=0x10;
  wela2=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;
}
}
void minute_display()
{
int min_shi,min_ge;
min_shi=min/10;
min_ge=min%10;

if(flag==2&&k!=1)
  k++;
else
{
  k=0;
  dula=1;
  P0=~table[min_ge];
  dula=0;
  wela1=1;
  P1=0x00;
  wela1=0;
  wela2=1;
  P1=0x08;
  wela2=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;

  dula=1;
  P0=~table[min_shi];
  dula=0;
  wela1=1;
  P1=0x00;
  wela1=0;
  wela2=1;
  P1=0x04;
  wela2=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;
}
}
void hour_display()
{
int h_shi,h_ge;
h_shi=h/10;
h_ge=h%10;

if(flag==3&&m!=1)
  m++;
else
{
  m=0;
  dula=1;
  P0=~table[h_ge];
  dula=0;
  wela1=1;
  P1=0x00;
  wela1=0;
  wela2=1;
  P1=0x02;
  wela2=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;
  delay(1);

  dula=1;
  P0=~table[h_shi];
  dula=0;
  wela1=1;
  P1=0x00;
  wela1=1;
  P1=0x00;
  wela1=0;
  wela2=1;
  P1=0x01;
  wela2=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;
  wela2=0;
  delay(1);
}

}
void date_display()
{
int date_shi,date_ge;
date_shi=date/10;
date_ge=date%10;

if(flag==4&&n!=1)
  n++;
else
{
  n=0;
  dula=1;
  P0=~table[date_ge];
  dula=0;
  wela2=1;
  P1=0x00;
  wela2=0;
  wela1=1;
  P1=0x80;
  wela1=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;

  dula=1;
  P0=~table[date_shi];
  dula=0;
  wela2=1;
  P1=0x00;
  wela2=0;
  wela1=1;
  P1=0x40;
  wela1=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;
}
}
void month_display()
{
int month_shi,month_ge;
month_shi=month/10;
month_ge=month%10;

if(flag==5&&o!=1)
  o++;
else
{
  o=0;
  dula=1;
  P0=~table[month_ge];
  dula=0;
  wela2=1;
  P1=0x00;
  wela2=0;
  wela1=1;
  P1=0x20;
  wela1=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;

  dula=1;
  P0=~table[month_shi];
  dula=0;
  wela2=1;
  P1=0x00;
  wela2=0;
  wela1=1;
  P1=0x10;
  wela1=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;
}
}
void year_display()
{
int year_qian,year_bai,year_shi,year_ge;
year_qian=year/1000;
year_bai=year%1000/100;
year_shi=year%1000%100/10;
year_ge=year%10;

if(flag==6&&p!=1)
  p++;
else
{
  p=0;
  dula=1;
  P0=~table[year_ge];
  dula=0;
  wela2=1;
  P1=0x00;
  wela2=0;
  wela1=1;
  P1=0x08;
  wela1=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;

  dula=1;
  P0=~table[year_shi];
  dula=0;
  wela2=1;
  P1=0x00;
  wela2=0;
  wela1=1;
  P1=0x04;
  wela1=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;

  dula=1;
  P0=~table[year_bai];
  dula=0;
  wela2=1;
  P1=0x00;
  wela2=0;
  wela1=1;
  P1=0x02;
  wela1=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;

  dula=1;
  P0=~table[2];
  dula=0;
  wela2=1;
  P1=0x00;
  wela2=0;
  wela1=1;
  P1=0x01;
  wela1=0;
  delay(1);
  dula=1;
  P0=0xff;
  dula=0;
  wela1=0;
}
}
void control()
{
if(!key_ch)
{
  delay(5);
  if(!key_ch)
  {
   flag++;
   if(flag==7)
    flag=0;
  }
}
while(!key_ch);
if(flag==1&&key_add==0)
{
  while(!key_add);
  sec++;
  if(sec==60)
   sec=0;
}
if(flag==1&&key_minus==0)
{
  while(!key_minus);
  sec--;
  if(sec==-1)
   sec=59;
}

if(flag==2&&key_add==0)
{
  while(!key_add);
  min++;
  if(min==60)
   min=0;
}
if(flag==2&&key_minus==0)
{
  while(!key_minus);
   min--;
  if(min==-1)
   min=59;
}

if(flag==3&&key_add==0)
{
  while(!key_add);
  h++;
  if(h==24)
   h=0;
}
if(flag==3&&key_minus==0)
{
  while(!key_minus);
  h--;
  if(h==-1)
   h=23;
}

if(flag==4&&key_add==0)
{
  while(!key_add);
  date++;
  if(date==29)
   if((year%4!=0)&&(month==2))
    date=1;
  if(date==30)
   if((year%4==0)&&(month==2))
    date=1;
  if(date==31)
   if((month==4)||(month==6)||(month==9)||(month==11))
    date=1;
  if(date==32)
   if((month==1)||(month==3)||(month==5)||(month==7)||(month==8)||(month==10)||(month==12))
    date=1;
}

if(flag==5&&key_add==0)
{
  while(!key_add);
  month++;
  if(month==13)
   month=1;
}
if(flag==5&&key_minus==0)
{
  while(!key_minus);
  month--;
  if(month==0)
   month=12;
}

if(flag==6&&key_add==0)
{
  while(!key_add);
  year++;
  if(year==99)
   year=1;
}
if(flag==6&&key_minus==0)
{
  while(!key_minus);
  year--;
  if(year==0)
   year=99;
}
}

void T0_rpt() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
i++;
time();
}

void time()
{
if(i==20)
{
  i=0;
  sec++;
  if(sec==60)
  {
   sec=0;
   min++;
   if(min==60)
   {
    min=0;
    h++;
    if(h==24)
    {
     h=0;
     min=0;
     sec=0;
     date++;
     if(date==29)
      if((year%4!=0)&&(month==2))
      {
       date=1;
       month++;
       if(month==13)
       {
        month=1;
        year++;
       }
      }
     if(date==30)
      if((year%4==0)&&(month==2))
      {
       date=1;
       month++;
       if(month==13)
       {
        month=1;
        year++;
       }
      }
     if(date==31)
      if((month==4)||(month==6)||(month==9)||(month==11))
      {
       date=1;
       month++;
       if(month==13)
       {
        month=1;
        year++;
       }
      }
     if(date==32)
      if((month==1)||(month==3)||(month==5)||(month==7)||(month==8)||(month==10)||(month==12))
      {
       date=1;
       month++;
       if(month==13)
       {
        month=1;
        year++;
       }
      }
    }
   }
  }
}
}

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