51时钟（含闹钟）是我做的第一个小东西，包括焊版，包括写代码，完了以后虽然觉得没什么，但是过程还是很享受的，下一个小东西是集成12864，红外，18B20和DS12C887来做个可以显示万年历和温度并且用红外来选择功能的小东西。下面是时钟的代码：
#include<reg52.h>
#include<define.h>
/*延时函数，毫秒级*/
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
/*闹铃响函数*/
void music()
{
beep=0;
delay(50);
beep=1;
delay(100);
beep=0;
delay(100);
beep=1;
}
/*写命令函数，1604液晶*/
void write_com(uchar com)
{
rs=0;
wr=0;
P1=com;
lcden=0;
delay(10);
lcden=1;
delay(10);
lcden=0;
}
/*写数据函数，1604液晶*/
void write_date(uchar date)
{
rs=1;
wr=0;
P1=date;
lcden=0;
delay(10);
lcden=1;
delay(10);
lcden=0;
}
/*初始化函数*/
void init()
{
uchar num;
EA=1;
EX0=1;
IT0=1;
lcden=0;
//write_ds(0x0A,0x20);//打开振荡器
read_ds(0x0c);
write_com(0x80);
for(num=0;num<15;num++)
{
write_date(table[num]);
delay(5);
}
write_com(0x80+0x40);
for(num=0;num<12;num++)
{
write_date(table1[num]);
delay(5);
}
}
/*写时间函数*/
void write_sfm(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_date(0x30+shi);
write_date(0x30+ge);
}
/*写年月日函数*/
void write_ymd(uchar add,uint num)
{
write_com(0x80+add);
temp=num/10;
write_date(0x30+temp);
temp=num%10;
write_date(0x30+temp);
}
/*写星期函数*/
void write_week()
{
write_com(0x80+0x0d);
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(0x53);
write_date('U');
write_date('N');
break;
}
}
/*键盘扫描函数*/
void keyscan()
{
/*若是功能键被按下*/
if(s1==0)
{
delay(5);
if(s1==0)
{
s1num++;
flag=1;
while(!s1);
if(s1num==1)//秒
{
write_com(0x80+0x40+10);
write_com(0x0f);
}
if(s1num==2)//分
{
write_com(0x80+0x40+7);
}
if(s1num==3)//时
{
write_com(0x80+0x40+4);
}
if(flag1==1)s1num=8;//若是设置闹铃，则跳过年月日的设置
if(s1num==4)//星期
{
write_com(0x80+0x0D);
}
if(s1num==5)//天
{
write_com(0x80+0x0a);
}
if(s1num==6)//月
{
write_com(0x80+0x07);
}
if(s1num==7)//年
{
write_com(0x80+0x04);
}
if(s1num==8)//退出
{
s1num=0;
write_com(0x0c);
flag=0;//退出功能键
if(flag1==0)//若不是设置闹铃
{
lcd_reset();
init();
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);
}
else//若是闹铃设置，则将设定的时间付给闹铃时间变量,回到初始化界面
{
write_ds(1,miao);//写入闹铃单元
write_ds(3,fen);
write_ds(5,shi);
lcd_reset();
init();
}
}
}//if(s2==0)
}//if(s2==0)
if(s1num!=0)
{
//增加键
if(s2==0)
{
delay(1);
if(s2==0)
{
while(!s2);
if(s1num==1)
{
miao++;
if(miao==60)
miao=0;
write_sfm(10,miao);
write_com(0x80+0x40+10);
}
if(s1num==2)
{
fen++;
if(fen==60)
fen=0;
write_sfm(7,fen);
write_com(0x80+0x40+7);
}
if(s1num==3)
{
shi++;
if(shi==24)
shi=0;
write_sfm(4,shi);
write_com(0x80+0x40+4);
}
if(s1num==4)
{
week++;
if(week==8)week=1;
write_week();
write_com(0x80+0x0D);
}
if(s1num==5)//日
{
day++;
if(day==31)day=1;
write_ymd(0x0a,day);
write_com(0x80+0x0a);
}
if(s1num==6)//月
{
month++;
if(month==12)month=1;
write_ymd(7,month);
write_com(0x80+0x07);
}
if(s1num==7)//年
{
year++;
if(year==100)year=0;
write_ymd(4,year);
write_com(0x80+0x04);
}
}//if(s2==0)
}//if(s2==0)
//减少键
if(s3==0)
{
delay(5);
if(s3==0)
{
while(!s3);
if(s1num==1)
{
if(miao==0)
{
miao=59;
write_sfm(10,miao);
write_com(0x80+0x40+10);
}
miao--;
if(miao==-1)
miao=59;
write_sfm(10,miao);
write_com(0x80+0x40+10);
}
if(s1num==2)
{
fen--;
if(fen==-1)
fen=59;
write_sfm(7,fen);
write_com(0x80+0x40+7);
}
if(s1num==3)
{
shi--;
if(shi==-1)
shi=23;
write_sfm(4,shi);
write_com(0x80+0x40+4);
}
if(s1num==4)//
{
week--;
if(week==-1)week=7;
write_week();
write_com(0x80+0x0C);
}
if(s1num==5)//日
{
day--;
if(day==-1)day=31;
write_ymd(0x0a,day);
write_com(0x80+0x0a);
}
if(s1num==6)//月
{
month--;
if(month==-1)month=12;
write_ymd(7,month);
write_com(0x80+0x07);
}
if(s1num==7)//年
{
year--;
if(year==-1)year=99;
write_ymd(4,year);
write_com(0x80+0x04);
}
}//if(s3==0)
}//if(s3==0)
//闹铃键
if(s4==0)
{
delay(5);
if(s4==0)
{
flag1=1;//闹铃设置开启
while(!s4);
/*在液晶上显示设置闹铃的界面*/
lcd_reset();
write_com(0x80);
while(table2[i]!='\0')
{
write_date(table2[i]);
i++;
}
i=0;
write_com(0x80+0x40);
while(table1[i]!='\0')
{
write_date(table1[i]);
i++;
}
write_sfm(10,miao);
write_sfm(7,fen);
write_sfm(4,shi);
/*显示出光标*/
write_com(0x80+0x40+10);
write_com(0x0f);
i=0;
}//if(s4==0)
}//if(s4==0)
}//if(s1num!=0)
/*若闹铃响则按下闹铃键取消*/
if(flag2)
{
if(s4==0)
{
delay(5);
if(s4==0)
{
while(!s4);
flag2=0;
}
}
}
}
/*写数据函数*/
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;
}
/*读数据函数*/
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;
}
/*液晶初始化函数*/
void lcd_reset()
{
delay(15);
write_com(0x38);
delay(5);
write_com(0x38);
delay(5);
write_com(0x38);
delay(5);
write_com(0x08);
write_com(0x01);
write_com(0x06);
write_com(0x0c);
}
/*主函数*/
void main()
{
lcd_reset();
init();
while(1)
{
keyscan();
asec=read_ds(1);//读出闹铃时间
amin=read_ds(3);
ahour=read_ds(5);
if(flag==0)//若是功能键未被按下，则运行时钟
{
miao=read_ds(0);
fen=read_ds(2);
shi=read_ds(4);
week=read_ds(6);
day=read_ds(7);
month=read_ds(8);
year=read_ds(9);
if(asec==miao&&amin==fen&&ahour==shi)flag2=1;//闹铃标志
write_sfm(10,miao);
write_sfm(7,fen);
write_sfm(4,shi);
write_week();
write_ymd(0x0a,day);
write_ymd(7,month);
write_ymd(4,year);
}
if(flag2)music();//闹铃响
}
}
/*外部中断函数*/
void exter() interrupt 0
{
uchar c;
c=read_ds(0x0c);
}
作者：QiangWaiQiang 发表于2013-5-29 0:12:18 原文链接
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