用51做了一个时钟出现乱码

2019-07-15 18:14发布

11912 5

我用51跟24c02写了一个时钟有一个问题就是掉电以后秒钟会乱码然后从零开始下面是代码#include<reg52.h>
#include"24c02.h"
#define uchar unsigned char
#define uint unsigned int
sbit wela=P2^7;
sbit dula=P2^6;
sbit lcden=P3^4;  //液晶使能端
sbit rs=P3^5;    //液晶读写端
sbit s1=P3^0;    //键盘
sbit s2=P3^1;
sbit s3=P3^2;
sbit rd=P3^7;
sbit beep=P2^3;
uchar count , s1num;
char miao,shi,fen;
uchar table[]=" 2014-10-25 SUN";  //初始化液晶显示
void delay(uint z)    //延时程序
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void beep1() //程序发声
{
beep=0;
delay(100);
beep=1;
}
void write_com(uchar com)    //液晶写命令函数
{
rs=0;
lcden=0;
delay(5);
P0=com;
lcden=1;
delay(5);
lcden=0;
}
void write_date(uchar date)    //液晶写数据函数
{
rs=1;
lcden=0;
P0=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}

void write_sfm(uchar add,uchar date)    //写时分秒函数
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_date(0x30+shi);
write_date(0x30+ge);
}

void init()
{
uchar num;
rd=0; //将第4列一端置低分离4个独立按键
dula=0; //将锁存器关闭防止出现乱码
wela=0;
lcden=0;
fen=0; //初始化分钟变量
miao=0;
shi=0;
count=0;
s1num=0;
init_24c02();
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80);
for(num=0;num<15;num++)
{
write_date(table[num]);
delay(5);
}
write_com(0x80+0x40+6);
write_date(':');
delay(5);
write_com(0x80+0x40+9);
write_date(':');
delay(5);
miao=read_add(1);
fen=read_add(2);
shi=read_add(3);
write_sfm(10,miao);
write_sfm(7,fen);
write_sfm(4,shi);
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void keyscan()
{
if(s1==0)
{
delay(5);
if(s1==0);
{
s1num++;
while(!s1);
   beep1();
if(s1num==1)
{
TR0=0;
write_com(0x80+0x40+11);    //光标到秒的位置
write_com(0x0f); //光标闪烁
}
if(s1num==2)
{
write_com(0x80+0x40+7); //光标到分的位置
}
if(s1num==3)
{
write_com(0x80+0x40+4);    //光标到时的位置
}
if(s1num==4)
{
write_com(0x0c);  //光标消失
s1num=0;
TR0=1;
}
}
}
if(s1num!=0)
{
if(s2==0)
{
delay(5);
if(s2==0)
{
while(!s2);
beep1();
if(s1num==1)
{
miao++;
if(miao==60)
miao=0;
write_sfm(10,miao);    //每调试一下就送入液晶
write_com(0x80+0x40+9);
write_add(1,miao); //将数据存入24c02中
}
if(s1num==2)
{
fen++;
if(fen==60)
fen=0;
write_sfm(7,fen);
write_com(0x80+0x40+7);
write_add(2,fen);
}
if(s1num==3)
{
shi++;
if(shi==24)
shi=0;
write_sfm(4,shi);
write_com(0x80+0x40+4);
write_add(3,shi);
}
}
}
if(s3==0)
{
delay(5);
if(s3==0)
{
while(!s3);
beep1();

if(s1num==1)
{
miao--;
if(miao==-1)
miao=59;
write_sfm(10,miao);
write_com(0x80+0x40+10);
write_add(1,miao);
}
if(s1num==2)
{
fen--;
if(fen==-1)
fen=59;
write_sfm(7,fen);
write_com(0x80+0x40+7);
write_add(2,fen);
}
if(s1num==3)
{
shi--;
if(shi==-1)
shi=23;
write_sfm(4,shi);
write_com(0x80+0x40+4);
write_add(3,shi);
}
}
}
}
}
void main()
{
init();
while(1)
{
keyscan();
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_add(3,shi);
}
   write_sfm(7,fen);
   write_add(2,fen);
}
write_sfm(10,miao);
write_add(10,miao);
}
}
}
void time_0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
count++;

}

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