LCD数字时钟1--C51单片机--从零开始的学习笔记

LCD数字时钟，断电后保存数据到24C02，上电后继续接着走。
代码：
main.c
#include<reg51.h>
#include"lcd1602.c"
#include"24c02.c"
#define uint unsigned int
#define uchar unsigned char
sbit k1 = P3^0;
sbit k2 = P3^1;
sbit k3 = P3^2;
sbit k4 = P3^3;
uchar count,miao,fen,shi,k1num;
uchar xiqi,ri,yue,nian;
uchar code table[] = " 2012-12-05 Wed ";
uchar code table_week[7][4] = {"Sun ","Mon ","Tus ","Wed ","Thr ","Fri ","Sat "};
void LCD1602_wrt_sfm ( uchar add , uchar dt ) {
uchar sh,ge;
sh = dt/10;
ge  = dt%10;
LCD1602_wrt_cmd(0x80+0x40+add);
LCD1602_wrt_dt(0x30+sh);
LCD1602_wrt_dt(0x30+ge);
}
void LCD1602_wrt_date ( uchar add , uchar dt ) {
uchar sh,ge;
sh = dt/10;
ge  = dt%10;
LCD1602_wrt_cmd(0x80+add);
LCD1602_wrt_dt(0x30+sh);
LCD1602_wrt_dt(0x30+ge);
}
            
void LCD1602_wrt_week ( uchar dt ) {
LCD1602_wrt_cmd(0x80+12);
LCD1602_wrt_dt(table_week[dt][0]);
LCD1602_wrt_dt(table_week[dt][1]);
LCD1602_wrt_dt(table_week[dt][2]);
}
void init() {
uchar num;
LCD1602_EN = 0;
miao = 0;
fen = 0;
shi = 0;
count = 0;
k1num = 0;
xiqi = 3;
nian = 12;
yue = 12;
ri = 5;
init_24c02();
miao = read_24c02 (1);
fen = read_24c02 (2);
shi = read_24c02 (3);
if ( (！(miao>=0&&miao<60))||(！(fen>=0&&fen<60))||(！(shi>=0&&shi<24)) ) {
  miao = 0;
  fen = 0;
  shi = 0;
  write_24c02 (1,miao);
  write_24c02 (2,fen);
  write_24c02 (3,shi);   
}
xiqi = read_24c02(4);
ri = read_24c02(5);
yue = read_24c02(6);
nian = read_24c02(7);
if ( (！(xiqi>=0&&xiqi<7))||(！(ri>=1&&ri<32))||(！(yue>=1&&shi<13))||(！(nian>=0&&nian<100)) ) {
  xiqi = 3;
  nian = 12;
  yue = 12;
  ri = 5;
  write_24c02 (4,xiqi);
  write_24c02 (5,ri);
  write_24c02 (6,yue);
  write_24c02 (7,nian);   
}
LCD1602_wrt_cmd(0x38);
delay(5);                                                              
    LCD1602_wrt_cmd(0x38);                                                
    delay(5);                                                              
    LCD1602_wrt_cmd(0x38);
delay(5);                                                
    LCD1602_wrt_cmd(0x0c);
delay(5);
LCD1602_wrt_cmd(0x06);
delay(5);
LCD1602_wrt_cmd(0x01);
delay(5);
LCD1602_wrt_cmd(0x80);
delay(5);
for( num=0 ; num<15 ; num++ ) {
  LCD1602_wrt_dt( table[num] );
  delay(5);
}
LCD1602_wrt_date(3,nian);
LCD1602_wrt_date(6,yue);
LCD1602_wrt_date(9,ri);
LCD1602_wrt_week(xiqi);
LCD1602_wrt_cmd(0x80+0x40+6);
LCD1602_wrt_dt(':');
delay(5);
LCD1602_wrt_cmd(0x80+0x40+9);
LCD1602_wrt_dt(':');
delay(5);
LCD1602_wrt_sfm(10,miao);
LCD1602_wrt_sfm(7,fen);
LCD1602_wrt_sfm(4,shi);
TMOD = 0x01;
TH0 = (65536-49950)/256;
TL0 = (65536-49950)%256;
EA = 1;
ET0 = 1;
TR0 = 1;
}
void keyscan () {
if ( ！k1 ) {
  delay(10);
  if ( ！k1 ) {
   k1num++;
   while ( ！k1 ) Bp( 20 );;
   if ( 1==k1num ) {
    TR0 = 0;
    LCD1602_wrt_cmd(0x80+0x40+11);
    LCD1602_wrt_cmd(0x0f);
   }
   if ( 2==k1num ) {
     LCD1602_wrt_cmd(0x80+0x40+8);
   }
   if ( 3==k1num ) {
    LCD1602_wrt_cmd(0x80+0x40+5);
   }
   if ( 4==k1num ) {
     LCD1602_wrt_cmd(0x80+14);
   }
   if ( 5==k1num ) {
    LCD1602_wrt_cmd(0x80+10);
   }
   if ( 6==k1num ) {
     LCD1602_wrt_cmd(0x80+7);
   }
   if ( 7==k1num ) {
    LCD1602_wrt_cmd(0x80+4);
   }   
   if ( 8==k1num ) {
       k1num = 0;
    LCD1602_wrt_cmd(0x0c);
    TR0 = 1;
   }
  }
}
if ( k1num ) {
   if ( ！k2 ) {
    delay(10);
   if ( ！k2 ) {
     while ( ！k2 ) Bp( 20 );
    if ( 1==k1num ) {
       miao++;
     if ( 60==miao ) miao=0;
     LCD1602_wrt_sfm(10,miao);
     write_24c02 (1,miao);
     LCD1602_wrt_cmd(0x80+0x40+11);
    }
    if ( 2==k1num ) {
     fen++;
     if ( 60==fen ) fen=0;
     LCD1602_wrt_sfm(7,fen);
     write_24c02 (2,fen);
     LCD1602_wrt_cmd(0x80+0x40+8);
    }
    if ( 3==k1num ) {
     shi++;
     if ( 24==shi ) shi=0;
     LCD1602_wrt_sfm(4,shi);
     write_24c02 (3,shi);
     LCD1602_wrt_cmd(0x80+0x40+5);
    }
    if ( 4==k1num ) {
     xiqi++;
     if ( 7==xiqi ) xiqi = 0;
     LCD1602_wrt_week(xiqi);
     write_24c02 (4,xiqi);
     LCD1602_wrt_cmd(0x80+14);
    }
    if ( 5==k1num ) {
     ri++;
     if ( 32==ri ) ri = 1;
     LCD1602_wrt_date(9,ri);
     write_24c02 (5,ri);
     LCD1602_wrt_cmd(0x80+10);
    }
    if ( 6==k1num ) {
      yue++;
     if ( 13==yue ) yue = 1;
     LCD1602_wrt_date(6,yue);
     write_24c02 (6,yue);
     LCD1602_wrt_cmd(0x80+7);
    }
    if ( 7==k1num ) {
     nian++;
     if ( 100==nian ) nian = 0;
     LCD1602_wrt_date(3,nian);
     write_24c02 (7,nian);
     LCD1602_wrt_cmd(0x80+4);
    }
   }
  }
}
if ( k1num ) {
   if ( ！k3 ) {
    delay(10);
   if ( ！k3 ) {
     while ( ！k3 ) Bp( 20 );;
    if ( 1==k1num ) {
       miao--;
     if ( -1==miao ) miao=59;
     LCD1602_wrt_sfm(10,miao);
     write_24c02 (1,miao);
     LCD1602_wrt_cmd(0x80+0x40+11);
    }
    if ( 2==k1num ) {
     fen--;
     if ( -1==fen ) fen=59;
     LCD1602_wrt_sfm(7,fen);
     write_24c02 (2,fen);
     LCD1602_wrt_cmd(0x80+0x40+8);
    }
    if ( 3==k1num ) {
     shi--;
     if ( -1==shi ) shi=23;
     LCD1602_wrt_sfm(4,shi);
     write_24c02 (3,shi);
     LCD1602_wrt_cmd(0x80+0x40+5);
    }
    if ( 4==k1num ) {
     xiqi--;
     if ( -1==xiqi ) xiqi = 6;
     LCD1602_wrt_week(xiqi);
     write_24c02 (4,xiqi);
     LCD1602_wrt_cmd(0x80+14);
    }
    if ( 5==k1num ) {
     ri--;
     if ( -1==ri ) ri = 31;
     LCD1602_wrt_date(9,ri);
     write_24c02 (5,ri);
     LCD1602_wrt_cmd(0x80+10);
    }
    if ( 6==k1num ) {
      yue--;
     if ( -1==yue ) yue = 12;
     LCD1602_wrt_date(6,yue);
     write_24c02 (6,yue);
     LCD1602_wrt_cmd(0x80+7);
    }
    if ( 7==k1num ) {
     nian--;
     if ( -1==nian ) nian = 99;
     LCD1602_wrt_date(3,nian);
     write_24c02 (7,nian);
     LCD1602_wrt_cmd(0x80+4);
    }
   }
  }
}
if ( k1num ) {
   if ( ！k4 ) {
    delay(10);
   if ( ！k4 ) {
     while ( ！k4 ) Bp( 20 );
    k1num = 0;
    LCD1602_wrt_cmd(0x0c);
    TR0 = 1;
   }
  }
}
}
void main () {
  init();
while(1) {
   keyscan();
}
}
void time0 () interrupt 1 {
  TH0 = (65536-49950)/256;
TL0 = (65536-49950)%256;
count++;
if ( 20==count ) {
   count = 0;
  miao++;
  if ( 60==miao ) {
     miao = 0;
   fen++;
   if ( 60==fen ) {
    fen = 0;
     shi++;
    if ( 24==shi ) {
      shi = 0;
     ri++;
     if ( 32==ri ) ri = 0;
     xiqi++;
     if ( 32==ri ) ri = 0;
     LCD1602_wrt_week(xiqi);
     write_24c02 (4,xiqi);
     LCD1602_wrt_date(9,ri);
     write_24c02 (5,ri);
    }
    LCD1602_wrt_sfm(4,shi);
    write_24c02 (3,shi);
   }
   LCD1602_wrt_sfm(7,fen);
   write_24c02 (2,fen);
  }
  LCD1602_wrt_sfm(10,miao);
  write_24c02 (1,miao);
}
}
24C02.c
sbit sda = P2^0;
sbit scl = P2^1;
void _delay_ () {
  ; ;
}
void start() {   //开始信号
  sda = 1;
_delay_();
scl = 1;
_delay_();
sda = 0;
_delay_();
}
void stop() {   //停止信号
  sda = 0;
_delay_();
scl = 1;
_delay_();
sda = 1;
_delay_();
}
void respons() { //应答
  unsigned char i;
scl = 1;
_delay_();
while( (1==sda)&&(i<250) ) i++;
scl = 0;
_delay_();
}
void init_24c02() {
  sda = 1;
_delay_();
scl = 1;
_delay_();   
}
void write_byte(unsigned char dt){
  unsigned char i,temp;
temp = dt;
for ( i=0 ; i<8 ; i++ ) {
   temp = temp<<1;
  scl=0;
  _delay_();
  sda = CY;
  _delay_();
  scl = 1;
  _delay_();
}
scl = 0;
_delay_();
sda = 1;
_delay_();
}
unsigned char read_byte() {
  unsigned char i,k;
scl=0;
_delay_();
sda=1;
_delay_();
for ( i=0 ; i<8 ; i++ ) {
  scl = 1;
  _delay_();
  k = (k<<1)|sda;
  scl = 0;
  _delay_();
}
return k;
}
void write_24c02 ( unsigned char i , unsigned char dt ) {
   start();
write_byte(0xa0);
respons();
write_byte(i);
respons();
write_byte(dt);
respons();
stop();
}
unsigned char read_24c02 ( unsigned char i ) {
    unsigned char dt;
start();
write_byte(0xa0);
respons();
write_byte(i);
respons();
start();
write_byte(0xa1);
respons();
dt = read_byte();
stop();
return dt;
}
LCD1602.c
sbit LCD1602_RS = P2^6;
sbit LCD1602_RW = P2^5;
sbit LCD1602_EN = P2^7;
sbit Beep = P1^5;
void delay ( unsigned int z ) {   //粗略延时
    unsigned int x,y;
    for ( x=z ; x>0 ; x-- )
        for ( y=110 ; y>0 ; y-- );
}
void Bp ( unsigned int z ) {   //蜂鸣器
unsigned int x;
for ( x=z ; x>0 ; x-- ) {
  Beep = 0;
     delay(1);
     Beep = 1;
  delay(1);
}
}
void LCD1602_wrt_cmd ( unsigned char cmd ) {   //液晶写命令 LCD1602
    LCD1602_RS = 0;
LCD1602_RW = 0;
    LCD1602_EN = 0;
    P0 = cmd;
    delay(5);
    LCD1602_EN = 1;
    delay(5);
    LCD1602_EN = 0;
}
void LCD1602_wrt_dt ( unsigned char dt ) {   //液晶写数据 LCD1602
    LCD1602_RS = 1;
LCD1602_RW = 0;
    LCD1602_EN = 0;
    P0 = dt;
    delay(5);
    LCD1602_EN = 1;
    delay(5);
    LCD1602_EN = 0;
}

学习。

小编怎么不放图上来呢

什么学习笔记都没有呀?

这是我前几天弄的，当时没拍。
后面的会慢慢上图的。

额，这些个代码基本都是手敲的，我觉得这个笔记最直接了。别的东西的话，用我朋友的话说是：别说那么多没用的，直接给我看代码。

额，这些个代码基本都是手敲的，我觉得这个笔记最直接了。别的东西的话，用我朋友的话说是：别说那么多没用的，直接给我看代码。

我的汇编语言比你的更麻烦

不错的文档，顶一下