2.24

 #include<reg52.h>


//sbit Led1 = P0^0;
sbit Latch_seg = P2^0;
sbit Latch_bit = P2^1;


sbit KEY1 = P1^0;
sbit KEY2 = P1^1;
sbit KEY3 = P1^2;
sbit KEY4 = P1^3;
sbit KEY5 = P1^4;
sbit KEY6 = P1^5;
sbit KEY7 = P1^6;
sbit KEY8 = P1^7;
 
void LedScan();
void KeyScan();
void KeyDriver();
void ShowTime();
void S_keydriver();


/*unsigned char code LedChar[16]={
   0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E
};*/
unsigned char code LedChar[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
unsigned char code LedBuff[] = {0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F};
unsigned char Led[8] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
unsigned char KeySta[8] = {1,1,1,1,1,1,1,1};
unsigned char sec = 0;
unsigned char min = 0;
unsigned int hour = 0;
bit flag = 0;
bit T_flag = 1;
unsigned char k = 0;
bit setIndex = 0;


void SetTime();
void KeyDriver();
void KeyAction(unsigned char i);


void main()
{


EA = 1;
     TMOD = 0x01;
TH0 = 0xFC;
TL0 = 0x67;
ET0 = 1;
     TR0 = 1; 


while(1)
{     
  if(setIndex == 0)
  {
     KeyDriver();
     ShowTime();
  }
  else
  {
     S_keydriver();
  }
}
}


void InterruptTimer0() interrupt 1
{
static unsigned int cnt = 0;


     TH0 = 0xFC;
TL0 = 0x67;
LedScan();
KeyScan();
cnt++;
if(cnt >= 1000)
{
    cnt = 0;
flag = 1;
}
 
}


void ShowTime()
{
     if((flag == 1)&&(T_flag == 1))
{
flag = 0;
sec++;
if(sec >= 60)
{
   sec = 0;
min++;
if(min >= 60)
{
   min = 0;
   hour++;
if(hour >= 24)
{
   hour = 0;
}
}
}
   Led[7] = LedChar[sec%10];
       Led[6] = LedChar[sec/10];
       Led[5] = 0x40;
       Led[4] = LedChar[min%10];
       Led[3] = LedChar[min/10];
       Led[2] = 0x40;
       Led[1] = LedChar[hour%10];
       Led[0] = LedChar[hour/10];
   }
}


void StopTime()
{
     T_flag = 0; 
}


void ClearTime()
{
     sec = 0;
min = 0;
hour = 0;
}


void SetTime(unsigned char k)
{
     static unsigned char T_num[3] ={0,0,0};
static unsigned int i = 2;


if(k == 0)
{
    T_num[i]++;
}
else if(k == 1)
{
    T_num[i]--;
} 
else if(k == 2)
{
    i--;
if(i < 0)
{ 
   i = 2;
}
}
else if(k == 3)
{
    i++;
if(i >= 3)
{
   i = 0;
}
}
else if(k == 7)
{
     setIndex = 0;
}


sec = T_num[2];
min = T_num[1];
hour = T_num[0];
Led[7] = LedChar[sec%10];
Led[6] = LedChar[sec/10];
Led[5] = 0x40;
Led[4] = LedChar[min%10];
Led[3] = LedChar[min/10];
Led[2] = 0x40;
Led[1] = LedChar[hour%10];
Led[0] = LedChar[hour/10];
}