本人最近小搞了下單片機，目前還是菜鳥，以下是單片機程序，基本功能都可以實現，但程序有點小問題（反應不靈敏），還請高手指點下，感激不盡哦！！！
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar code table[]=" 2011-3-11 ";
uchar code table1[]=" 14:59:55 ";
uchar count, hour, minute, second, press;
sbit rs=P2^4;
sbit rw=P2^5;
sbit en=P2^6;
sbit key1=P3^0;
sbit key2=P3^1;
sbit key3=P3^2;
void delay ()
{ ; ;}
void write_cmd(uchar cmd) //1602寫指令
{
rs=0;
delay();
rw=0;
delay();
en=0;
delay();
P0=cmd;
en=1;
delay();
en=0;
delay();
}
void write_byte(uchar date) //1602寫數據
{
rs=1;
delay();
rw=0;
delay();
en=0;
delay();
P0=date;
en=1;
delay();
en=0;
}
void delay1(uint z)
{
uint x, y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void display(uchar addr, uchar date) //顯示在液晶屏上
{
uchar ge, shi;
ge=date%10;
shi=date/10;
write_cmd(0x80+0x40+addr);
write_byte(shi+0x30);
write_byte(ge+0x30);
}
void keyscan() //鍵盤掃描，key1功能鍵，key2增加，key3減少
{
if(key1==0)
{
delay1(5);
if(key1==0)
{
while(!key1);
press++;
if(press==1)
{
TR0=0;
write_cmd(0x80+0x40+0x09);
write_cmd(0x0f);
}
if(press==2)
{
write_cmd(0x80+0x40+0x06);
write_cmd(0x0f);
}
if(press==3)
{
write_cmd(0x80+0x40+0x03);
write_cmd(0x0f);
}
if(press==4)
{
press=0;
write_cmd(0x0c);
TR0=1;
}
}
}
if(key2==0)
{
delay1(5);
if(key2==0)
{
while(!key2);
if(press==1)
{
second++;
if(second==60)
{
second=0;
}
display(8,second);
}
if(press==2)
{
minute++;
if(minute==60)
{
minute=0;
}
display(5,minute);
}
if(press==3)
{
hour++;
if(hour==24)
{
hour=0;
}
display(2,hour);
}
}
}
if(key3==0)
{
delay1(5);
if(key3==0)
{
while(!key3);
if(press==1)
{
second--;
if(second==-1)
{
second=59;
}
display(8,second);
}
if(press==2)
{
minute--;
if(minute==-1)
{
minute=59;
}
display(5,minute);
}
if(press==3)
{
hour--;
if(hour==0)
{
hour=23;
}
display(2,hour);
}
}
}
}
void init ()
{
en=0;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
write_cmd(0x38);
write_cmd(0x0c);
write_cmd(0x06);
write_cmd(0x01);
hour=14;
minute=59;
second=55;
}
void timer0 () interrupt 1 //定時器中斷處理函數
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
count++;
if(count==18)
{
count=0;
second++;
if(second==60)
{
second=0;
minute++;
if(minute==60)
{
minute=0;
hour++;
if(hour==24)
{
hour=0;
}
display(2,hour);
}
display(5,minute);
}
display(8,second);
}
}
void main ()
{
uchar i;
init();
write_cmd(0x80);
for(i=0;i<15;i++)
{
write_byte(table[i]);
delay1(5);
}
write_cmd(0x80+0x40);
for(i=0;i<13;i++)
{
write_byte(table1[i]);
delay1(5);
}
while(1)
{
keyscan();
}
}