51单片机时钟

可以调时间，包括平年润年的情况

#include

#define uchar unsigned char

sbit rs=P2^6;

sbit rw=P2^5;

sbit en=P2^7;

sbit keyen=P2^0;

sbit keyfu=P2^1;

sbit keyjia=P2^2;

sbit keyjian=P2^3;

ucharyear=12,month=2,day=29,week=7;

char hour=23,min=59,sec=50;

uchar count,t,jud;

uchar wek[][3]={"  ","Mon","Tue","Wen","Thi","Fri","Sta","Sun"};

void delayms(int a)

{

int x,y;

for(x=a;x>0;x--)

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

}

void write_com(uchar com)

{

rs=0;

rw=0;

en=0;

P0=com;

delayms(2);

en=1;

delayms(2);

en=0;

delayms(2);

}

void write_dat(uchar dat)

{

rs=1;

rw=0;

en=0;

P0=dat;

delayms(2);

en=1;

delayms(2);

en=0;

delayms(2);

}

void write_zfc(uchar *ch)

{

while(*ch!=0)

write_dat(*ch++);

}

void write_nyr(uchar add,uchardat)

{

uchar shi=dat/10,ge=dat;

write_com(0x80+add);

write_dat(0x30+shi);

write_dat(0x30+ge);

}

void write_sfm(uchar add,uchardat)

{

uchar shi=dat/10,ge=dat;

write_com(0x80+0x40+add);

write_dat(0x30+shi);

write_dat(0x30+ge);

}

void write_week(uchar dat)

{

write_com(0x80+13);

write_zfc(wek[dat]);

}

void init_1602()

{

write_com(0x38);

write_com(0x0c);

write_com(0x06);

write_com(0x01);

write_com(0x80+2);

write_zfc("20  - -  ");

write_com(0x80+0x40+6);

write_zfc(": :");

write_nyr(4,year);

write_nyr(7,month);

write_nyr(10,day);

write_week(week);

write_sfm(4,hour);

write_sfm(7,min);

write_sfm(10,sec);

}

int is(uchar year)

{

int temp=20*100+year;

if((temp%4==0&&temp0!=0)||(temp@0==0))

return 1;

return 0;

}

void keyscan()

{

if(keyen==0)

{

jud=1;

delayms(20);

while(!keyen);

TR0=0;

if(t==0)

{

write_com(0x80+0x40+11);

write_com(0x0f);

}

if(t==1)

{

write_com(0x80+0x40+8);

write_com(0x0f);

}

if(t==2)

{

write_com(0x80+0x40+5);

write_com(0x0f);

}

if(t==3)

{

write_com(0x80+13);

write_com(0x0f);

}

if(t==4)

{

write_com(0x80+11);

write_com(0x0f);

}

if(t==5)

{

write_com(0x80+8);

write_com(0x0f);

}

if(t==6)

{

write_com(0x80+5);

write_com(0x0f);

}

t++;

if(t>6)

t=0;

}

if(keyfu==0)

{

delayms(20);

while(!keyfu);

TR0=1;

write_com(0x80+0x40+11);

write_com(0x0c);

jud=t=0;

}

if(jud==1&&keyjia==0)

{

delayms(20);

while(!keyjia);

if(t==1)

{

sec++;

if(sec>59)

sec=0;

write_sfm(10,sec);

write_com(0x80+0x40+11);

}

if(t==2)

{

min++;

if(min>59)

min=0;

write_sfm(7,min);

write_com(0x80+0x40+8);

}

if(t==3)

{

hour++;

if(hour>23)

hour=0;

write_sfm(4,hour);

write_com(0x80+0x40+5);

}

if(t==4)

{

week++;

if(week>7)

week=1;

write_week(week);

write_com(0x80+13);

}

if(t==5)

{

day++;

if(day>31)

day=1;

write_nyr(10,day);

write_com(0x80+11);

}

if(t==6)

{

month++;

if(month>12)

month=1;

write_nyr(7,month);

write_com(0x80+8);

}

if(t==0)

{

year++;

write_nyr(4,year);

write_com(0x80+5);

}

}

if(jud==1&&keyjian==0)

{

delayms(20);

while(!keyjian);

if(t==1)

{

sec--;

if(sec<0)

sec=59;

write_sfm(10,sec);

write_com(0x80+0x40+11);

}

if(t==2)

{

min--;

if(min<0)

min=59;

write_sfm(7,min);

write_com(0x80+0x40+8);

}

if(t==3)

{

hour--;

if(hour<0)

hour=23;

write_sfm(4,hour);

write_com(0x80+0x40+5);

}

if(t==4)

{

week--;

if(week<1)

week=7;

write_week(week);

write_com(0x80+13);

}

if(t==5)

{

day--;

if(day<1)

day=31;

write_nyr(10,day);

write_com(0x80+11);

}

if(t==6)

{

month--;

if(month<1)

month=12;

write_nyr(7,month);

write_com(0x80+8);

}

if(t==0)

{

year--;

write_nyr(4,year);

write_com(0x80+5);

}

}

}

void main()

{

t=jud=0;

init_1602();

TMOD=0X10;

TH0=(65536-50000)/256;

TL0=(65536-50000)%6;

EA=1;

ET0=1;

TR0=1;

while(1)

{

keyscan();

if(count==200)

{

count=0;

sec++;

if(sec==60)

{

sec=0;

min++;

if(min==60)

{

min=0;

hour++;

if(hour==24)

{

hour=0;

day++;

week++;

if(week=8)

week=1;

if(is(year)==1)

{

switch(month)

{

case 1:case 3:case 5:case 7:case 8:case10:case 12:

if(day>31)

{

day=1;

month++;

if(month>12)

{

month=1;

year++;

write_nyr(4,year);

}

write_nyr(7,month);

}break;

case 4:case 6:case 9:case11:

if(day>30)

{

day=1;

month++;

if(month>12)

{

month=1;

year++;

write_nyr(4,year);

}

write_nyr(7,month);

}break;

default :

if(day>29)

{

day=1;

month++;

if(month>12)

{

month=1;

year++;

write_nyr(4,year);

}

write_nyr(7,month);

}break;

}

}

else

{

 switch(month)

{

case 1:case 3:case 5:case 7:case 8:case10:case 12:

if(day>31)

{

day=1;

month++;

if(month>12)

{

month=1;

year++;

write_nyr(4,year);

}

write_nyr(7,month);

}break;

case 4:case 6:case 9:case11:

if(day>30)

{

day=1;

month++;

if(month>12)

{

month=1;

year++;

write_nyr(4,year);

}

write_nyr(7,month);

}break;

default :

if(day>28)

{

day=1;

month++;

if(month>12)

{

month=1;

year++;

write_nyr(4,year);

}

write_nyr(7,month);

}break;

}

}

write_nyr(10,day);

write_week(week);

}

write_sfm(4,hour);

}

write_sfm(7,min);

}

write_sfm(10,sec);

}

}

}

void timer0() interrupt 1

{

TH0=(65536-50000)/256;

TL0=(65536-50000)%6;

count++;

}