这是一款AT89C51单片机1602液晶显示时钟程序，功能主要有：温度、时间、日期、星期显示以及调节。有多级菜单显示。第一级菜单调节时间、日期。第二级菜单显示自定义信息。

#include"reg52.h"

#include"intrins.h"

#define uchar unsigned char

#define uint unsigned int

sbit DQ=P2^1;

sbit light=P2^7;

sbit k1=P1^0;

sbit k2=P1^1;

sbit k3=P1^2;

sbit k4=P1^3;

sbit k5=P1^4;

sbit LED1=P1^3;

sbit LED2=P1^4;

sbit DS1302_CE=P3^5;

sbit DS1302_IO=P3^6;

sbit DS1302_SCLK=P3^7;

sbit LCD1602_RS=P2^4;

sbit LCD1602_RW=P2^5;

sbit LCD1602_EN=P2^6;

extern uchar wendu[4];

extern void get_wendu();

extern void LCD1602_init();

extern void LCD1602_wcmd(uchar cmd);

extern void LCD1602_wdat(uchar dat);

extern void LCD1602_pos(uchar x,bit y);         //定义显示位置，x为列，y为行，0上1下

extern void LCD1602_dischar(uchar x,bit y,uchar dat); //在指定位置显示字符

extern void LCD1602_prints(uchar x,bit y,uchar *p);  //显示字符串

extern uchar dt[7];

extern void set_time();

extern void get_time();

extern void DS1302_init();

uchar dt[7];

void DS1302_write_byte(uchar dat)

{

char i;

for(i=0;i

uchar i;

uchar dat = 0;

for(i=0;i

DS1302_CE=0;

_nop_();

_nop_();

DS1302_SCLK=0;

_nop_();

_nop_();

DS1302_CE=1;

_nop_();

_nop_();

DS1302_write_byte(address);

DS1302_write_byte(dat);

DS1302_SCLK=1;

DS1302_CE=0;

}

uchar DS1302_read(uchar address)

{

uchar dat;

DS1302_CE=0;

_nop_();

_nop_();

DS1302_SCLK=0;

_nop_();

_nop_();

DS1302_CE=1;

_nop_();

_nop_();

DS1302_write_byte(address);

dat =DS1302_read_byte();

DS1302_SCLK=1;

DS1302_CE=0;

dat=dat/16*10+dat;

return dat;

}

void DS1302_init()

{

DS1302_write(0x8e,0x00);

DS1302_write(0x80,0x00);

DS1302_write(0x82,0x00);

DS1302_write(0x84,0x12);

DS1302_write(0x86,0x10);

DS1302_write(0x88,0x11);

DS1302_write(0x8a,0x06);

DS1302_write(0x8c,0x12);

DS1302_write(0x8e,0x80);

}

void set_time()

{

uchar i,j=0x80;

for(i=0;i

DS1302_write(j,dt[i]);

j+=2;

}

DS1302_write(0x8e,0x80);

}

void get_time()

{

dt[0] =DS1302_read(0x81);

dt[1] =DS1302_read(0x83);

dt[2] =DS1302_read(0x85);

dt[3] =DS1302_read(0x87);

dt[4] =DS1302_read(0x89);

dt[5] =DS1302_read(0x8b);

dt[6] =DS1302_read(0x8d);

}

void chaongdiaon()                                   //充电

{