基于51单片机的电子时钟

一、实验要求：

  设计一个基于51单片机的电子时钟, 具有显示年、月、日、星期、时、分、秒、闹钟功能

二、主要电子元件：

• STC89C52单片机
• 1602LCD显示屏
• 无源蜂鸣器
• 11.0592MHz晶振
• 排阻
• 电容、电阻、三极管等

三、原理图

四、程序代码

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit BF = P0^7;
sbit EN = P2^5;
sbit RS = P1^0;
sbit RW = P1^1;       
sbit dula=P2^6;
sbit wela=P2^7;
sbit s1=P3^0;
sbit s2=P3^1;
sbit s3=P3^2;
sbit s4=P3^3;
sbit rd=P3^7;
sbit fm=P2^3;
uint num;
unsigned long int dat,nian=2016;
char miao=55,shi=23,fen=59,xingqi=6,kg,ri=31,yue=12,count,s1num,s4num,cshi=0,cfen=0,cmiao=0,zt;
uchar code table[]="     -  -       ";
uchar code table1[]="      :  :      ";
uchar code *table2[7]={
  
  "MON","TUE","WED","THU","FRI","SAT","SUN"};
uchar code *table3[2]={
  
  "OF","ON"};
uchar code alarm[]={
  
  "  alarm setting "};
void delayms(uint z)//延时
{
    uint i,j;
    for(j=z;j>0;j--)
        for(i=110;i>0;i--);
}
void wait(void)//判忙
{
     P0=0xFF;
     do{
         RS=0;
         RW=1;
         EN=0;
         EN=1;
     }
     while (BF==1);
     EN=0;
}

void w_dat(uchar dat)//数据写入
{
    wait();
    EN=0;
    P0=dat;
    RS=1;
    RW=0;
    EN=1;
    EN=0;
}

void w_cmd(uchar cmd)//命令写入
{
    wait();
    EN=0;
    P0=cmd;
    RS=0;
    RW=0;
    EN=1;
    EN=0;
}

void w_sfm(uchar add,uchar date)//时分秒写入
{
    uchar shi,ge;
    shi=date/10;
    ge=date%10;
    w_cmd(0x80+add);
    w_dat(0x30+shi);
    w_dat(0x30+ge);
}

void w_nian(uchar add, unsigned long int dat) //年份写入
{
    uchar qian,bai,shi,ge;
    ge=dat%10;
    shi=(dat/10)%10;
    bai=(dat/100)%10;
    qian=(dat/1000)%10;
    w_cmd(0x80+add);
    w_dat(0x30+qian);
    w_dat(0x30+bai);
    w_dat(0x30+shi);
    w_dat(0x30+ge);
}
void xianshi(void)//显示函数
{
    w_cmd(0x80);
    for(num=0;num<16;num++){
        w_dat(table[num]);
    }                       //显示日期
    w_cmd(0x80+0x40);
    for(num=0;num<16;num++){
        w_dat(table1[num]);
    }
    w_nian(1,nian);
    w_sfm(6,yue);
    w_sfm(9,ri);
    w_cmd(0x80+12);
    for(num=0;num<3;num++)
        w_dat(table2[xingqi][num]);
    w_sfm(0x40+4,shi);
    w_sfm(0x40+7,fen);
    w_sfm(0x40+10,miao);                        //显示时间
}
void Init_LCD1602(void)//初始化
{
    dula=0;
    wela=0;
    w_cmd(0x38);
    w_cmd(0x0c);
    w_cmd(0x06);
    w_cmd(0x01);
    w_cmd(0x80);
    xianshi();          
    TMOD=0x01;
    TH0=(65536-