define uchar unsigned char
sbit RS=P2^0;      //?????У???????????
sbit RW=P2^1;
sbit E=P2^2;
sbit led1=P2^3;
sbit led2=P2^4;
int count,fen,miao,shi,key=0,i,d;
uchar c=0;
void delay(unsigned int n)   //???????
{unsigned int x,y;
for(x=0;x<n;x++)
for(y=0;y<123;y++);}
void write_command(char com)  //д??????????
{  
   E=0;
   RS=0;
   RW=0;
   P1=com;
   E=1;
   
   E=0;
   delay(1);
   }
void write_data(char dat)   //д??????????
{  
   E=0;
   RS=1;
   RW=0;
   P1=dat;
   E=1;
  
   E=0;
   delay(1);
     }
void lcd_initial(void)   //lcd?????
{
  write_command(0x38);
  write_command(0x0c);
  write_command(0x06);
  delay(1);
  }
void string(uchar position,uchar *s)  //??????????
{ write_command(position);
   while(*s>0)
   {write_data(*s++);
    delay(1);
}
  }
/******************************************
??????????
???????STC89C52
P2???谴????
S1-4=   e7 eb ed ee
S5-8=   d7 db dd de
S9-10=  b7 bb bd be
S13-16= 77 7b 7d 7e
*****************************************/
unsigned char keyscand(void)
{
unsigned char a,b;
P3=0xf0;
if((P3&0xf0)!=0xf0)
{     delay(2);
   if((P3&0xf0)!=0xf0)
  {
   a=P3&0xf0;
   P3=0x0f;
   b=P3&0x0f;
  }   
}
   return(a+b);
}
void main(void)      
     
{
    led1=0;
    led2=0;
    lcd_initial();//?????????
    EA=1;        //?????
    ET0=1; //??????T0?????ж?
TMOD=0x01;  //T0???1
    TH1=(65536-50000)/256;//????????????50ms
    TL1=(65536-50000)%256;
TR0=1;
     
while(1)
{
        key=keyscand();    //????????
  switch(key) //?ж???????????????￡?
    {
     case 0xee: i=0; break; //???????
     case 0xde: i=1; break;
     case 0xbe: i=2; break;
     case 0x7e: i=3; break;
     case 0xed: i=4; break;
     case 0xdd: i=5; break;
     case 0xbd: i=6; break;
     case 0x7d: i=7; break;
     case 0xeb: i=8; break;
     case 0xdb: i=9; break;
     case 0xbb: i=10; break;
     case 0x7b: i=11; break;
     case 0xe7: i=12; break;
     case 0xd7: i=13; break;
     case 0xb7: i=14; break;
     case 0x77: i=15; break;
    }
    if(fen==15&&shi==0||fen==15&&shi==1||fen==15&&shi==2)
    {
    led1=1;
    }
       if(i==10)
    {
      led1=0;
      delay(10);
      c++;   
    }
    if(fen==30&&shi==0||fen==30&&shi==1||fen==30&&shi==2)
    { led2=1;
    }
   
    if(i==11)
    {
    led2=0;
    d++;
    delay(10);
    }
   
     
   
}
}
  void timer0() interrupt 1  //?ж?
{   
    TH1=(65536-50000)/256;
    TL1=(65536-50000)%256;
count++;    //???????????????????1S
                write_command(0x81);
    write_data('A');
    write_command(0x82);
    write_data('3');
    write_command(0x83);
    write_data('3');
    write_command(0x84);
    write_data('0'+c);
    write_command(0x86);
    write_data('B');
    write_command(0x87);
    write_data('3');
    write_command(0x88);
    write_data('3');
    write_command(0x89);
    write_data('0'+d);
       write_command(0xce);
    write_data('6');
       write_command(0xcf);
    write_data('4');
  
   
  write_command(0xC1);    //???shi???λ
  write_data(0x30+shi/10);
  write_command(0xC2);    //???shi???λ
  write_data(0x30+shi%10);
  string(0xC3,":");
  write_command(0xC4);   //???fen???λ
  write_data(0x30+fen/10);
  write_command(0xC5);   //???fen???λ
  write_data(0x30+fen%10);
  string(0xC6,":");
  write_command(0xC7);
  write_data(0x30+miao/10);
  write_command(0xC8);
  write_data(0x30+miao%10);  
  if(count==1) //20ms*50=1S
{count=0;
miao++;}   //?????miao+1
if(miao==60)
{ miao=0;
fen++;}     //?????fen+1
if(fen==60)
{ fen=0;
shi++;}
  if(shi==24)
   {shi=0;}}