STC89c52单片机设计6位数码管电子钟时钟

单片机型号是STC89C52，6位数码管，前两位显示时，中间两位显示分，后两位显示秒，
共阴极的，不要求闹钟功能，能用矩阵键盘调整时间就可以，要求C语言的程序，急求，能正确运行的话再加100分
用LCD1602液晶显示的电子钟的程序也可以

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit wela=P2^7;
sbit dula=P2^6;
sbit rs=P3^5;
sbit lcden=P3^4;
sbit rw=P3^6;
sbit s1=P3^0;
sbit s2=P3^1;
sbit s3=P3^2;
sbit rd=P3^7;
uchar code table[]=" 2012-6-09 SAT";
uchar code table1[]=" 20:00:00";
uchar count,s1num,shi,fen,miao;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=10;y>0;y--);
}

void write_com(uchar com)
{
rs=0;
rw=0;
lcden=0;
P0=com;
delay(10);
lcden=1;
delay(10);
lcden=0;
}
void write_date(uchar date)
{
rs=1;
rw=0;
lcden=0;
P0=date;
delay(10);
lcden=1;
delay(10);
lcden=0;
}
void write_sfm(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_date(0x30+shi);
write_date(0x30+ge);
}
void keyscan()
{
if(s1==0)
{
delay(5);
if(s1==0)
{
s1num++;
while(!s1);
if(s1num==1)
{
TR0=0;
write_com(0x80+0x40+11);
write_com(0x0f);
}
if(s1num==2)
{
write_com(0x80+0x40+8);
}
if(s1num==3)
{
write_com(0x80+0x40+5);
}
if(s1num==4)
{ s1num=0;
write_com(0x0c);
TR0=1;
}
}
}
if(s1num!=0)
{
if(s2==0)
{
delay(5);
if(s2==0)
{
while(!s2);

if(s1num==1)
{
miao++;
if(miao==60)
miao=0;
write_sfm(10,miao);
write_com(0x80+0x40+10);

}
if(s1num==2)
{
fen++;
if(fen==60)
fen=0;
write_sfm(7,fen);
write_com(0x80+0x40+7);

}
if(s1num==3)
{
shi++;
if(shi==24)
shi=0;
write_sfm(4,shi);
write_com(0x80+0x40+4);
}
}
}
if(s3==0)
{
delay(5);
if(s3==0)
{
while(!s3);

if(s1num==1)
{
miao--;
if(miao==-1)
miao=59;
write_sfm(10,miao);
write_com(0x80+0x40+10);

}
if(s1num==2)
{
fen--;
if(fen==-1)
fen=59;
write_sfm(7,fen);
write_com(0x80+0x40+7);

}
if(s1num==3)
{
shi--;
if(shi==-1)
shi=23;
write_sfm(4,shi);
write_com(0x80+0x40+4);

}
}
}
}
}
void init()
{
uchar num;
rw=0;
dula=0;
wela=0;
lcden=0;
write_com(0x38);
delay(20);
write_com(0x0c);
delay(20);
write_com(0x06);
delay(20);
write_com(0x01);
delay(20);
write_com(0x80);
delay(20);
for(num=0;num<15;num++)
{
write_date(table[num]);
delay(20);
}
write_com(0x80+0x40);
delay(20);
for(num=0;num<11;num++)
{ write_date(table1[num]);
delay(40);
}
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void main()
{
init();
while(1)
{
keyscan();
}
}
void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
count++;
if(count==20)
{
count=0;
miao++;
if(miao==60)
{
miao=0;
fen++;
if(fen==60)
{
fen=0;
shi++;
if(shi==24)
{
shi=0;
}
write_sfm(4,shi);

}
write_sfm(7,fen);

}
write_sfm(10,miao);

}

}

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