學習單片機半個月了，學得也差不多了，今天寫一個寫程序練習練習哈哈
跟電子表的功能一模一樣，可以進行設置，準確度非常高哈哈，用的是1602型號的液晶顯示器，大家只需要簡單的修改一下端口就能應用到你自己的設計上去了.
下面是源代碼：
#include<REG52.h>
#define uchar unsigned char
#define uint unsigned int
uchar code year_table[]=" 2010-04-11 SUN";
uchar code time_table[]=" 00:00:00";
uchar time_count,key_count;
char hour,minute,second,mouth,day,week;
uint year;
sbit rs=P3^5;
sbit lcden=P3^4;
sbit dula=P2^6;
sbit wela=P2^7;
sbit key_set=P3^0;
sbit key_inc=P3^1;
sbit key_dec=P3^2;
sbit rd=P3^7;
void delay(uint delay_time)
{
uint x,y;
for(x=delay_time;x>0;x--)
for(y=110;y>0;y--);
}
void write_com(uchar com)
{
rs=0;
lcden=0;
P0=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_date(uchar date)
{
rs=1;
lcden=0;
P0=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void timer_Init()
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
write_time(uchar addr,uchar time)
{
uchar shi,ge;
shi=time/10;
ge=time%10;
write_com(0x80+0x40+addr);
write_date(0x30+shi);
write_date(0x30+ge);
}
write_day(uchar addr,uchar day)
{
uchar shi,ge;
shi=day/10;
ge=day%10;
write_com(0x80+addr);
write_date(0x30+shi);
write_date(0x30+ge);
}
write_year(uchar addr,uint year)
{
uchar shi,ge,qian,bei;
qian=year/1000;
bei=year%1000/100;
shi=year%100%100/10;
ge=year%10;
write_com(0x80+addr);
write_date(0x30+qian);
write_date(0x30+bei);
write_date(0x30+shi);
write_date(0x30+ge);
}
write_week(uchar addr,uchar week)
{
write_com(0x80+addr);
switch(week)
{
case 1:
write_date('M');
write_date('O');
write_date('N');
break;
case 2:
write_date('T');
write_date('U');
write_date('E');
break;
case 3:
write_date('W');
write_date('E');
write_date('D');
break;
case 4:
write_date('T');
write_date('H');
write_date('U');
break;
case 5:
write_date('F');
write_date('R');
write_date('I');
break;
case 6:
write_date('S');
write_date('A');
write_date('T');
break;
case 7:
write_date('S');
write_date('U');
write_date('N');
break;
}
}
void Init()
{
uchar num;
dula=0;
wela=0;
lcden=0;
year=2010;
mouth=4;
day=11;
week=7;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80);
for(num=0;num<16;num++)
{
write_date(year_table[num]);
delay(5);
}
write_com(0x80+0x40);
for(num=0;num<12;num++)
{
write_date(time_table[num]);
delay(5);
}
timer_Init();
}
void keyscan()
{
rd=0;
if(key_set==0)
{
delay(5);
if(key_set==0)
{
key_count++;
while(!key_set);//等待鍵盤釋放
if(key_count==1)
{
TR0=0;
write_com(0x80+0x40+10);
write_com(0x0f);
}
if(key_count==2)
{
write_com(0x80+0x40+7);
}
if(key_count==3)
{
write_com(0x80+0x40+4);
}
if(key_count==4)
{
write_com(0x80+13);
}
if(key_count==5)
{
write_com(0x80+10);
}
if(key_count==6)
{
write_com(0x80+7);
}
if(key_count==7)
{
write_com(0x80+2);
}
if(key_count==8)
{
key_count=0;
write_com(0x0c);
TR0=1;
}
}
}
if(key_count!=0)
{
if(key_inc==0)
{
delay(5);
if(key_inc==0)
{
while(!key_inc);
if(key_count==1)
{
second++;
if(second==60)
{
second=0;
}
write_time(10,second);
write_com(0x80+0x40+10);
}
if(key_count==2)
{
minute++;
if(minute==60)
{
minute=0;
}
write_time(7,minute);
write_com(0x80+0x40+7);
}
if(key_count==3)
{
hour++;
if(hour==24)
{
hour=0;
}
write_time(4,hour);
write_com(0x80+0x40+4);
}
if(key_count==4)
{
week++;
if(week==8)
{
week=1;
}
write_week(13,week);
write_com(0x80+13);
}
if(key_count==5)
{
day++;
if(day==32)
{
day=1;
}
write_day(10,day);
write_com(0x80+10);
}
if(key_count==6)
{
mouth++;
if(mouth==13)
{
mouth=1;
}
write_day(7,mouth);
write_com(0x80+7);
}
if(key_count==7)
{
year++;
write_year(2,year);
write_com(0x80+2);
}
}
}
if(key_dec==0)
{
delay(5);
if(key_dec==0)
{
while(!key_dec);
if(key_count==1)
{
second--;
if(second==-1)
{
second=59;
}
write_time(10,second);
write_com(0x80+0x40+10);
}
if(key_count==2)
{
minute--;
if(minute==-1)
minute=59;
write_time(7,minute);
write_com(0x80+0x40+7);
}
if(key_count==3)
{
hour--;
if(hour==-1)
hour=23;
write_time(4,hour);
write_com(0x80+0x40+4);
}
if(key_count==4)
{
week--;
if(week==0)
{
week=7;
}
write_week(13,week);
write_com(0x80+13);
}
if(key_count==5)
{
day--;
if(day==0)
{
day=31;
}
write_day(10,day);
write_com(0x80+10);
}
if(key_count==6)
{
mouth--;
if(mouth==0)
{
mouth=12;
}
write_day(7,mouth);
write_com(0x80+7);
}
if(key_count==7)
{
year--;
if(year==2009)
{
year=2010;
}
write_year(2,year);
write_com(0x80+2);
}
}
}
}
}
void main()
{
Init();
while(1)
{
keyscan();
}
}
void clock_timer() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
time_count++;
if(time_count==18)
{
time_count=0;
second++;
if(second==60)
{
second=0;
minute++;
if(minute==60)
{
minute=0;
hour++;
if(hour==24)
{
hour=0;
}
write_time(4,hour);
}
write_time(7,minute);
}
write_time(10,second);
}
}