实物如图
#include"reg51.h"
#define uint unsigned int
#define uchar unsigned char
sbit rs=P1^2;
sbit rw=P1^1;
sbit lcden=P1^0;
sbit s1=P3^4;
sbit s2=P3^5;
sbit s3=P3^6;
sbit s4=P3^2;
sbit rd=P3^7;
sbit beep=P2^0;
sbit dscs=P1^7;
sbit dsas=P1^6;
sbit dsrw=P1^5;
sbit dsds=P1^4;
sbit dsirq=P3^3;
bit flag1,flag_ri; //定义两个位变量
uchar count,s1num,flag,t0_num; //其他变量定义
char miao,shi,fen,year,month,day,week,amiao,afen,ashi;
uchar code table[]=" 20 - - "; //液晶固定显示内容
uchar code table1[]=" : : "; //
void write_ds(uchar,uchar);
void set_alarm(uchar,uchar,uchar);
void read_alarm();
uchar read_ds(uchar);
void set_time();
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void di()
{
beep=0;
delay(100);
beep=1;
}
void write_com(uchar com) //写液晶命令函数
{
rs=0;
lcden=0;
P0=com;
delay(3);
lcden=1;
delay(3);
lcden=0;
}
#include <REGX51.H>
void write_date(uchar date) //写液晶数据函数
{
rs=1;
lcden=0;
P0=date;
delay(3);
lcden=1;
delay(3);
lcden=0;
}
void init()
{
uchar num;
EA=1;
EX1=1;
IT1=1;
flag1=0;
t0_num=0;
s1num=0;
week=1;
lcden=0;
rw=0;
rd=0;
write_ds(0x0A,0x20);
write_ds(0x0B,0x26);
set_time();
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(1);
}
write_com(0x80+0x40);
for(num=0;num<11;num++)
{
write_date(table1[num]);
delay(1);
}
}
void write_sfm(uchar add,char date)//1602刷新时分秒函数4为时，7为分，10为妙
{
char shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_date(0x30+shi);
write_date(0x30+ge);
}
void write_nyr(uchar add,char date)//1602刷新时分秒函数3为年，6为分，9为妙
{
char shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+add);
write_date(0x30+shi);
write_date(0x30+ge);
}
void write_week(char we) //写液晶显示函数
{
write_com(0x80+12);
switch(we)
{
case 1: write_date('M');delay(5);
write_date('O');delay(5);
write_date('N');
break;
case 2: write_date('T');delay(5);
write_date('U');delay(5);
write_date('E');
break;
case 3: write_date('W');delay(5);
write_date('E');delay(5);
write_date('D');
break;
case 4: write_date('T');delay(5);
write_date('H');delay(5);
write_date('U');
break;
case 5: write_date('F');delay(5);
write_date('R');delay(5);
write_date('I');
break;
case 6: write_date('S');delay(5);
write_date('A');delay(5);
write_date('T');
break;
case 7: write_date('S');delay(5);
write_date('U');delay(5);
write_date('N');
break;
}
}
void keyscan()
{
if(flag_ri==1)
{
if((s1==0)||(s2==0)||(s3==0)||(s4==0))
{
delay(5);
if((s1==0)||(s2==0)||(s3==0)||(s4==0))
{
while(!(s1&&s2&&s3&&s4));
di();
flag_ri=0;
}
}
}
if(s1==0)
{
delay(5);
if(s1==0)
{
s1num++;
if(flag1==1)
if(s1num==4)
s1num=1;
flag=1;
while(!s1);
di();
switch(s1num)
{
case 1: write_com(0x80+0x40+10);
write_com(0xf0);
break;
case 2: write_com(0x80+0x40+7);
break;
case 3: write_com(0x80+0x40+4);
break;
case 4: write_com(0x80+12);
break;
case 5: write_com(0x80+9);
break;
case 6: write_com(0x80+6);
break;
case 7: write_com(0x80+3);
break;
case 8: s1num=0;
write_com(0x0c);
flag=0;
write_ds(0,miao);
write_ds(2,fen);
write_ds(4,shi);
write_ds(6,week);
write_ds(7,day);
write_ds(8,month);
write_ds(9,year);
break;
}
}
}
if(s1num!=0)
{
if(s2==0)
{
delay(1);
if(s2==0)
{
while(!s2);
di();
switch(s1num) //根据功能键次数调节相应数值
{
case 1: miao++;
if(miao==60)
miao=0;
write_sfm(10,miao);
write_com(0x80+0x40+10);
break;
case 2: fen++;
if(fen==60)
fen=0;
write_sfm(7,fen);
write_com(0x80+0x40+7);
break;
case 3: shi++;
if(shi==24)
shi=0;
write_sfm(4,shi);
write_com(0x80+0x40+4);
break;
case 4: week++;
if(week==8)
week=1;
write_week(week);
write_com(0x80+12);
break;
case 5: day++;
if(day==32)
day=1;
write_nyr(6,month);
write_com(0x80+9);
break;
case 6: month++;
if(month==13)
month=1;
write_nyr(6,month);
write_com(0x80+6);
break;
case 7: year++;
if(year==100)
year=0;
write_nyr(3,year);
write_com(0x80+3);
break;
}
}
}
if(s3==0)
{
delay(1);
if(s3==0)
{
while(!s3);
di();
switch(s1num)
{
case 1: miao--;
if(miao==-1)
miao=59;
write_sfm(10,miao);
write_com(0x80+0x40+10);
break;
case 2: fen--;
if(fen==-1)
fen=59;
write_sfm(7,fen);
write_com(0x80+0x40+7);
break;
case 3: shi--;
if(shi==1)
shi=23;
write_sfm(4,shi);
write_com(0x80+0x40+4);
break;
case 4: week--;
if(week==0)
week=7;
write_week(week);
write_com(0x80+12);
break;
case 5: day--;
if(day==0)
day=31;
write_nyr(6,month);
write_com(0x80+9);
break;
case 6: month--;
if(month==0)
month=12;
write_nyr(6,month);
write_com(0x80+6);
break;
case 7: year--;
if(year==-1)
year=99;
write_nyr(3,year);
write_com(0x80+3);
break;
}
}
}
}
if(s4==0)
{
delay(5);
if(s4==0)
{
flag1=~flag1;
while(!s4);
di();
if(flag1==0)
{
flag=0;
write_com(0x80+0x40);
write_date(' ');
write_date(' ');
write_com(0x0c);
write_ds(1,miao);
write_ds(3,fen);
write_ds(5,shi);
}
else
{
read_alarm();
miao=amiao;
fen=afen;
shi=ashi;
write_com(0x80+0x40);
write_date('R');
write_date('i');
write_com(0x80+0x40+3);
write_sfm(4,ashi);
write_sfm(7,afen);
write_sfm(10,amiao);
}
}
}
}
void write_ds(uchar add,uchar date)
{
dscs=0;
dsas=1;
dsds=1;
dsrw=1;
P0=add;
dsas=0;
dsrw=0;
P0=date;
dsrw=1;
dsas=1;
dscs=1;
}
uchar read_ds(uchar add)
{
uchar ds_date;
dsas=1;
dsds=1;
dsrw=1;
dscs=0;
P0=add;
dsas=0;
dsds=0;
P0=0xff;
ds_date=P0;
dsds=1;
dsas=1;
dscs=1;
return ds_date;
}
void set_time()
{
write_ds(0,0);
write_ds(1,0);
write_ds(2,0);
write_ds(3,0);
write_ds(4,0);
write_ds(5,0);
write_ds(6,0);
write_ds(7,0);
write_ds(8,0);
write_ds(9,0);
}
void read_alarm()
{
amiao=read_ds(1);
afen=read_ds(3);
ashi=read_ds(5);
}
void main()
{
init();
while(1)
{
keyscan();
if(flag_ri==1)
{
di();
delay(100);
di();
delay(500);
}
if(flag==0&&flag1==0)
{
keyscan();
year=read_ds(9);
month=read_ds(8);
day=read_ds(7);
shi=read_ds(6);
fen=read_ds(4);
miao=read_ds(2);
write_sfm(10,miao);
write_sfm(7,fen);
write_sfm(4,shi);
write_week(week);
write_nyr(3,year);
write_nyr(6,month);
write_nyr(9,day);
}
}
}
void exter() interrupt 2
{
uchar c;
flag_ri=1;
c=read_ds(0x0c);
}
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