#include <reg52.h>
#include <stdio.h>
#include <intrins.h>
sbit p3_2=P3^2;
sbit p3_3=P3^3;
sbit p3_4=P3^4;
//**************************************************************************
unsigned char code display_code[10]=
 {
 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f //0,1,2,3,4,5,6,7,8,9                                    
 };
unsigned char data display_data_buff[6]={0,1,2,3,4,5};//數據顯示緩沖區
unsigned char data display_code_buff[6]={0,1,2,3,4,5};//段碼顯示緩沖區
//**************************************************************************
struct time_str
{
 unsigned char hour;
 unsigned char minute;
 unsigned char second;
 unsigned char second20;
}time;
//**************************************************************************
void dp_data_to_dp_code_buff(void)
{
 unsigned char i;
 for (i=0;i<6;i++)
  {
  display_code_buff[i]=display_code[display_data_buff[i]]; 
  }
}
//**************************************************************************
void timer0_ISR (void) interrupt 1 using 0    
{
 TH0=0X3C;
 TL0=0X0B0;
 time.second20++;
 if (time.second20==20)
  {
   time.second20=0;
   time.second++;
   if (time.second==60)
    {
     time.second=0;
     time.minute++;
     if (time.minute==60)
      {
       time.minute=0;
       time.hour++;
       if (time.hour==24)
        {
         time.hour=0;
        }
      }
    }
  }
}
       
//**************************************************************************
void time_to_display_data_buff(void)
{
 display_data_buff[5]=time.hour/10;
 display_data_buff[4]=time.hour%10;
 display_data_buff[3]=time.minute/10;
 display_data_buff[2]=time.minute%10;
 display_data_buff[1]=time.second/10;
 display_data_buff[0]=time.second%10;
 dp_data_to_dp_code_buff();
 display_code_buff[4]=display_code_buff[4]+0x80;
 display_code_buff[2]=display_code_buff[2]+0x80;
 
}
//**************************************************************************
void delay(void)
{
    unsigned char i,j;
    for(i=1;i<2;i++)
    {
        for (j=1;j<200;j++)
        {
        }
    }
}
//**************************************************************************
void k1_operation(void)
{
 time.hour++;
 if(time.hour==24)
  time.hour=0;
}
//**************************************************************************
void k2_operation(void)
{
 time.minute++;
 if(time.minute==60)
 { 
  time.minute=0;
        time.hour++;
     }
}
//**************************************************************************
void k3_operation(void)
{
 time.second++;
 if(time.second==60)
 { 
  time.second=0;
        time.minute++;
     }
}
//**************************************************************************
void display(void)
{   
    unsigned char i;
    time_to_display_data_buff();
 P2=0x01;
    for(i=0;i<6;i++)
    {
   P0=display_code_buff[i];
     delay();
  P2=P2<<1;
    }
}
//**************************************************************************
void main(void)
{   unsigned char flag_2=0,flag_3=0,flag_4=0;
    TMOD=0X01;
  TH0=0X3C;
 TL0=0X0B0;
  TR0=1; 
  IE=0x82;
 time.hour=12;
 time.minute=01;
 time.second=29;
 time.second20=0;  
  while (1)
      {
      display();

       if(p3_2==0)
        flag_2=1;
    if(p3_2==1&&flag_2==1)
        {
      flag_2=0;
      k1_operation();
     }

    if(p3_3==0)
        flag_3=1;
    if(p3_3==1&&flag_3==1)
        {
      flag_3=0;
      k2_operation();
     }

    if(p3_4==0)
        flag_4=1;
    if(p3_4==1&&flag_4==1)
        {
      flag_4=0;
      k3_operation();
     }
    
    
     
       }
}