// ENG ABDALLA HYGAZY  //
  
   // TEMR ++  7SEGMENT    //
   
  //  DATDA / 2016 / 11 / 20 //
  
  #define LED_OF PORTD.F0=0;

unsigned short mask(unsigned short num);
unsigned int SEGMENT1=0,SEGMENT2=0,SEGMENT3=0,SEGMENT4=0,X=0;
unsigned int SEGcopy1=0,SEGcopy2=0;

  void interrupt(){
    porta=1;
    portb=mask(SEGMENT1);
    delay_ms(2);
    porta=2;
    portb=mask(SEGMENT2);
    delay_ms(2);
    INTCON=0b00100000;
    TMR0=0;
}
 //-------------------------------------------------------------//

    void SEGMENT_up() {
      SEGMENT1=0;  SEGMENT2=0; LED_OF PORTD.F3=0;
      while(X==0){
      if( PORTC.F2==1 ) { delay_ms(100);  X=1;   }
      PORTD.F4=1; PORTD.F1=1;
      delay_ms(100);
      SEGMENT2++;
      if( SEGMENT2==10){SEGMENT2=0;SEGMENT1++;  }
      if( SEGMENT1==10){SEGMENT1=0;  }
      if( SEGMENT1&&SEGMENT2==10)
      { SEGMENT1=0; SEGMENT2=0; }
      if(SEGMENT2==SEGcopy2&&SEGMENT1==SEGcopy1){PORTD.F0=1; X=1;  }
   }
  }
//-------------------------------------------------------------------//
   void SEGMENT_dwen() {
     SEGMENT2=9;  SEGMENT1=9; X=0; LED_OF PORTD.F3=0;
     while(X==0){
     if( PORTC.F2==1 ) { delay_ms(100);  X=1;   }
     PORTD.F4=1;  PORTD.F2=1;
     delay_ms(100);
     SEGMENT2--;
     if( SEGMENT2<1){SEGMENT2=9;SEGMENT1--;  }
     if( SEGMENT1<1){SEGMENT1=9;  }
     if( SEGMENT1==9&&SEGMENT2==9)
     { SEGMENT1=9; SEGMENT2=9; PORTD.F0=1; X=1; }
  }
 }

//------------------------------------------------------//
     void main() {
   OPTION_REG=0b10000101;
   INTCON=0b10100000;
   TMR0=217;
   TRISB=0;   PORTB=0;   TRISD=0; PORTD=0;
   TRISC=255; PORTC=0;   TRISA=0; PORTA=0;
   
    while(1){
    PORTD.F4=0;  PORTD.F3=1; PORTD.F1=0; PORTD.F2=0;

    if( PORTC.F3==1 ) { delay_ms(100); SEGMENT_up(); X=0;   }
    if( PORTC.F4==1 ) { delay_ms(100); SEGMENT_dwen();X=0; }
     if(PORTC.F0==1){SEGMENT2++; delay_ms(100);
     if( SEGMENT2==10){SEGMENT2=0;SEGMENT1++;  }
     if( SEGMENT1==10){SEGMENT1=0;  }
     if( SEGMENT1&&SEGMENT2==10)
     { SEGMENT1=0; SEGMENT2=0; }
       SEGcopy1=SEGMENT1;  SEGcopy2=SEGMENT2;
   }
    //****************************************//
     if(PORTC.F1==1){
     delay_ms(100);
     SEGMENT2--;
     if( SEGMENT2<1){SEGMENT2=9;SEGMENT1--;  }
     if( SEGMENT1<1){SEGMENT1=9;  }
     if( SEGMENT1&&SEGMENT2==0)
     { SEGMENT1=9; SEGMENT2=9; }
     SEGcopy1=SEGMENT1;  SEGcopy2=SEGMENT2;
    }
//*******************************************//
   
    if(PORTC.F5==1){SEGcopy1=SEGMENT1=0; SEGcopy2=SEGMENT2=0; X=0; LED_OF }

  }
 }
unsigned short mask(unsigned short num){
switch (num){
case 0 : return 0xC0;
case 1 : return 0xF9;
case 2 : return 0xA4;
case 3 : return 0xB0;
case 4 : return 0x99;
case 5 : return 0x92;
case 6 : return 0x82;
case 7 : return 0xD8;
case 8 : return 0x80;
case 9 : return 0x90;
}
}