#define SegDataPort	PORTD
#define SegCntrlPort    PORTB
int timer;
void InitTimer0();
unsigned char DigitTo7SegEncoder(unsigned char digit);
unsigned char seconds = 0;
unsigned char miseconds = 0;
unsigned char minutes = 0;
int pause=0;
void InitTimer0(){
  T0CON	 = 0x88;
  TMR0H	 = 0xB1;
  TMR0L	 = 0xE0;
  GIE_bit	 = 1;
  TMR0IE_bit	 = 1;

}
void main() {
 TRISD = 0; //op
 TRISB = 0; //op
 TRISC = 0XFF;
 InitTimer0();
 
   pause=1;
 while(1)
 {

  if(PORTC.b1 == 0)
  {
   delay_ms(100);
   miseconds=0;
   seconds=0;
   minutes=0;
   pause=1;
  }
  if(PORTC.b2 == 0)
  {
   delay_ms(100);
   pause=1;
  }
  if(PORTC.b3 == 0)
  {
   delay_ms(100);
   pause=0;
  }

  SegDataPort = DigitTo7SegEncoder(miseconds%10);
  SegCntrlPort = 0x20;
  delay_ms(10);
  SegCntrlPort = 0x00;
  SegDataPort = DigitTo7SegEncoder(miseconds/10);
  SegCntrlPort = 0x10;
  delay_ms(10);
  SegCntrlPort = 0x00;
  SegDataPort = DigitTo7SegEncoder(seconds%10);
  SegCntrlPort = 0x08;
  delay_ms(10);
  SegCntrlPort = 0x00;
  SegDataPort = DigitTo7SegEncoder(seconds/10);
  SegCntrlPort = 0x04;
  delay_ms(10);
  SegCntrlPort = 0x00;
  SegDataPort = DigitTo7SegEncoder(minutes%10);
  SegCntrlPort = 0x02;
  delay_ms(10);
  SegCntrlPort = 0x00;
  SegDataPort = DigitTo7SegEncoder(minutes/10);
  SegCntrlPort = 0x01;
  delay_ms(10);
  SegCntrlPort = 0x00;
  }
}




void Interrupt(){
  if (TMR0IF_bit){
    TMR0IF_bit = 0;
    TMR0H	 = 0xB1;
    TMR0L	 = 0xE0;
    if(pause==0)
    {
        miseconds++;
	if(miseconds == 100)
	{
		miseconds = 0;
		seconds++;
	}
        if(seconds == 60)
	{
		seconds = 0;
		minutes++;
	}
	if(minutes > 23)
	minutes = 0;
    }
  }
}


unsigned char DigitTo7SegEncoder(unsigned char digit)
{
	unsigned char SegVal;

	switch(digit)
	{
		case 0:	PORTD = 0b10111111;
				break;
		case 1:	PORTD = 0b10000110;
				break;
		case 2: PORTD = 0b11011011;
				break;
		case 3:	PORTD = 0b11001111;
				break;
		case 4:	PORTD = 0b11100110;
				break;
		case 5:	PORTD = 0b11101101;
				break;
		case 6: PORTD = 0b11111101;
				break;
		case 7:	PORTD = 0b10000111;
				break;
		case 8:	PORTD = 0b11111111;
				break;
		case 9:	PORTD = 0b11101111;
	}
	return PORTD;
}
 /*PORTD=0x06;
 PORTB=0x0F;
 delay_ms(500);
 PORTD=0x06;
 PORTB=0x00;
 delay_ms(500);*/