//  ENG/Adalla Hygazy  //
  // 7SEGMENT  Counter  //
  //     PIC16F877A     //
  //    KH 8M         //
  // DATA 2020/8/12   //
 unsigned short mask(unsigned short num);
 unsigned int  SEMENT,Time,counter,X1,X2;
 
//----------------------------------------------------------------------------------//
//Timer0
//Prescaler 1:8; TMR0 Preload = 6; Actual Interrupt Time : 1 ms

//Place/Copy this part in declaration section
void InitTimer0(){
  OPTION_REG         = 0x82;
  TMR0                 = 6;
  INTCON         = 0xA0;
}

void Interrupt(){
  if (TMR0IF_bit){
    TMR0IF_bit         = 0;
    TMR0                 = 6;
    //Enter your code here
    
    
    if(PORTD.F5==0 && X2==0){  PORTB=mask(SEMENT);     }

    if(PORTD.F5==1 && X2==0){ PORTB=mask(counter);   PORTC.F6=1; }
     else PORTC.F6=0;
     
    if(PORTD.F2==1         ){ PORTB=mask(Time);X2=1; PORTC.F7=1; }
     else PORTC.F7=0;
     
    if(PORTD.F2==0         ){  X2=0;}
    
    
  }
}


        void TEMER()
      {

       for(X1=0; X1<Time; X1++){ delay_ms(1000); }

      }
       
       
       
        void main(){
        InitTimer0();
        TRISB=0;   PORTB=0;
        TRISC=0;   PORTC=0;
        TRISD=252; PORTD=0;

        while(1){


       if(PORTD.F2==1)
       {  
       
        if(PORTD.F7==1){Time++; delay_ms(250); }
        if(PORTD.F6==1){Time--; delay_ms(250); }
        
        if( Time>9 ){  Time=0;  }
        if( Time<0 ){  Time=9;  }
       }
       
       
        if(PORTD.F4==1 && counter>0 && PORTD.F5==0 && PORTD.F2==0 ){  TEMER();SEMENT++;                   }
        if( counter >0 && SEMENT == counter){PORTC.F0=1;delay_ms(2000); PORTC.F0=0; SEMENT=0;}



        if(PORTD.F5==1)
     {

        if(PORTD.F7==1){counter++; delay_ms(250); }
        if(PORTD.F6==1){counter--; delay_ms(250); }

        if( counter>9 ){  counter=0;  }
        if( counter<0 ){  counter=9;  }
        
       
     }



}
}
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 0xF8;
case 8 : return 0x80;
case 9 : return 0x90;

}
}