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用c语言编译的51单片机 设计一个时钟，用1602显示，at24c02记录时间

程序如下，请问为什么该程序在复位重启后只有秒位是关机前的数字，分钟和小时都不是，io口定义都没问题不知道程序问题出在哪里望高手解答
#include<reg52.h>
#include"24c02.h"
#define uchar unsigned char
#define uint unsigned int
sbit lcdrs=P2^4;
sbit lcdrw=P2^5;
sbit lcden=P2^6;
sbit s1=P3^0;
sbit s2=P3^1;
sbit s3=P3^2;
sbit dula=P3^7;
uchar ge,shii,miao,fen,shi,tt,num,num1,flag;
uchar code table[]="2011-08-15-MON";
void delay(uchar z)
{
uchar x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void write_com(uchar com)
{
lcdrs=0;
P0=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_data(uchar date)
{
lcdrs=1;
P0=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void init_lcd()
{
lcdrw=0;
dula=1;
P0=0x00;
dula=0;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
}
void init_timer0()
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void write_sfm(uchar add,uchar date)
{
shii=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_data(0x30+shii);
write_data(0x30+ge);
}
void init_all()
{
init_24c02();
init_lcd();
write_com(0x80);
for(num=0;num<14;num++)
{
write_data(table[num]);
delay(5);
}
write_com(0x80+0x45);
write_data(':');
write_com(0x80+0x48);
write_data(':');
miao=read_add(1);
shi=read_add(5);
ge=read_add(9);
write_sfm(9,miao);
write_sfm(3,shi);
write_sfm(6,fen);
init_timer0();
}
void key_scan()
{
uchar num;
if(s1==0)
{
delay(10);
if(s1==0)
{
flag=1;
TR0=0;
num++;
while(!s1);
if(num==1)
{
write_com(0x80+0x49);
write_com(0x0f);
}
if(num==2)
{
write_com(0x80+0x46);
}
if(num==3)
{
write_com(0x80+0x43);
}
if(num==4)
{
num=0;
write_com(0x0c);
TR0=1;
flag=0;
}
}
}
if(flag==1)
{
if(s2==0)
{
delay(10);
if(s2==0)
{
while(!s2);
delay(10);
if(num==1)
{
miao++;
if(miao==60)



{
miao=0;
}
write_sfm(9,miao);
write_add(1,miao);
write_com(0x80+0x49);
}
if(num==2)
{
fen++;
if(fen==60)
{
fen=0;
}
write_sfm(6,fen);
write_add(5,fen);
write_com(0x80+0x46);
}
if(num==3)
{
shi++;
if(shi==24)
{
shi=0;
}
write_sfm(3,shi);
write_add(9,shi);
write_com(0x80+0x43);
}
}
}
if(s3==0)
{
delay(10);
if(s3==0)
{
while(!s3);
delay(10);
if(num==1)
{
miao--;
if(miao==255)
{
miao=59;
}
write_sfm(9,miao);
write_add(1,miao);
write_com(0x80+0x49);
}
if(num==2)
{
fen--;
if(fen==255)
{
fen=59;
}
write_sfm(6,fen);
write_add(5,fen);
write_com(0x80+0x46);
}
if(num==3)
{
shi--;
if(shi==255)
{
shi=23;
}
write_sfm(3,shi);
write_add(9,shi);
write_com(0x80+0x43);
}
}
}
}
}
void main()
{
init_all();
while(1)
{
key_scan();
}
}
void timer_0() interrupt 1
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
tt++;
if(tt==20)
{
tt=0;
miao++;
if(miao==60)
{
miao=0;
fen++;
if(fen==60)
{
fen=0;
shi++;
if(shi==24)
{
shi=0;
}
}
}
write_add(1,miao);
write_sfm(9,miao);
write_add(5,fen);



2025-08-05 11:41:17
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write_sfm(6,fen);
write_add(9,shi);
write_sfm(3,shi);
}
}
24c02的头文件
bit write=0;
#define uchar unsigned char
sbit scl=P1^1;
sbit sda=P1^2;
sbit wp=P1^0;
void delay0()
{;;}
void start()
{
sda=1;
delay0();
scl=1;
delay0();
sda=0;
delay0();
}
void stop()
{
sda=0;
delay0();
scl=1;
delay0();
sda=1;
delay0();
}
void response()
{
uchar i;
scl=1;
delay0();
while((sda==1)&&(i>250))i++;
scl=0;
delay0();
}
void init_24c02()
{
wp=0;
scl=1;
delay0();
sda=1;
delay0();
}
void write_byte(uchar date)
{
uchar temp,num;
temp=date;
for(num=0;num<8;num++)
{
temp=temp<<1;
scl=0;
delay0();
sda=CY;
delay0();
scl=1;
delay0();
}
scl=0;
delay0();
sda=1;
delay0();
}
void write_add(uchar address,uchar date)
{
start();
write_byte(0xae);
response();
write_byte(address);
response();
write_byte(date);
response();
stop();
}
uchar read_byte()
{
uchar i,k;
scl=0;
delay0();
sda=1;
delay0();
for(i=0;i<8;i++)
{
scl=1;
delay0();
k=(k<<1)|sda;
scl=0;
delay0();
}
return k;
}
uchar read_add(uchar address)
{
uchar date;
start();
write_byte(0xae);
response();
write_byte(address);
response();
start();
write_byte(0xaf);
response();
date=read_byte();
stop();
return date;
}



QQ:395978161


你的24c02干什么去了，不能用中断来产生秒，24c02会自动加秒的。。。。。。。。


测试思路：
1、首先测试24C02的读写接口是否有问题
2、排查程序在掉电时是否会对24C02接口进行操作
3、确认电路是否可靠
建议最好把图纸发一下，我帮你看看。或者在仿真社区提问，很快就能得到答案，仿真社区地址：http://www.protues.com.cn(Proteus仿真社区，专业的单片机学习社区)


QQ1205546193


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