for(i=0;i<12;i++) {
                  if (kp)
                  x=g[kp];
                  j=0;
                  delay_ms(50);
                  kp=keypad_key_click();
                  if(kp&&x) {j=x;
                             x=g[kp];
                             kp=0;
                             break;
                         }
                }

extern char button_press_1();
extern char button_press_2();
const char SEG[] ={0,1,2,3,4,5,6,7,8,9,0};
char RIGHT_1, RIGHT_10;
char LEFT_1,   LEFT_10;
char kp_1 , kp_2 , i , COUNTER=0;

void change() iv 0x0004 ics ICS_AUTO {    // this code for
                                         // external int. portb0  i did not use it .
INTCON &= ~(1<<INTF);
     }
void init_pic(){
           trisb=0b00000001;
           trisa=0b00000000;
           trisd=0x0f ;
           trisc=0x0f ;
           portb=0;
           porta=0;
           INTCON|= 1<< GIE ;
           INTCON |= 1<< INTE ;
           OPTION_REG |= 1<< INTEDG ;
        }
        
void main() {char j ,ONES_R , TENS_R ; unsigned int count_delay= 0 ; ADCON1=7;  init_pic();
     while(1) {   count_delay++;
              //   kp_2= button_press_2();
                kp_1= button_press_1();
            //**************** RIGHT DISPLAY UNIT
  if(kp_1 != 0 && kp_1 !=12 ){delay_ms(100);
              if(count_delay>0 && count_delay<2000) {TENS_R=ONES_R ; ONES_R=SEG[kp_1]<<4 ; count_delay=0; }
              else { ONES_R=SEG[kp_1]<<4 ; TENS_R= 0 ;count_delay=0;} }

              portb=ONES_R  ; porta=2; delay_ms(1); porta=0;  // RIGHT_UNIT ONES
              portb=TENS_R ; porta=1; delay_ms(1); porta=0;  // RIGHT_UNIT  TENS
              
              COUNTER = ((TENS_R>>4) * 10 + (ONES_R>>4)) ;

          //**************** RIGHT DISPLAY UNIT
              if(kp_1==12){delay_ms(100); COUNTER++ ;  ONES_R = COUNTER%10 ; ONES_R<<=4 ;
                                      TENS_R = COUNTER/10 ; TENS_R<<=4;  }  // prss *

       /*  //**************** LEFT DISPLAY UNIT
           if(kp_2=='*'){ COUNTER++; LEFT_1 =COUNTER%10 ; LEFT_10 = COUNTER/10 ;    }    // press #
              portb=SEG[LEFT_1]<<4 ;  porta=8; delay_ms(1); porta=0;   //LEFT_1
              portb=SEG[LEFT_10]<<4 ; porta=4; delay_ms(1); porta=0;   // LEFT_ 10
         //**********************/
       }
}

// KEYPAD 4x3 CODE
#define read_col portd      // for read INPUT COLUMN BIT 0,1,2,3
#define out_row portd         // OUTPUT ROW BIT 4,5,6
char x;
char button_press_1(){   char i ;
       for(i=1 ; i<=4 ; i=i<<1){  out_row=i<<4 ;  x = read_col & 0x0f ; if(x!=0){  delay_ms(200);}
             if(i==1){
                          switch (x){
                                    case 1:return 1;
                                    case 2:return 4;
                                    case 4:return 7;
                                    case 8:return 12;  //  key *
                                  }
                         }
            if(i==2){
                           switch(x){
                                        case 1: return 2;
                                        case 2: return 5;
                                        case 4: return 8;
                                        case 8: return 10; // key = 0 from array
                                       }
                       }
            if(i==4) {
                          switch(x){
                                        case 1: return 3;
                                        case 2: return 6;
                                        case 4: return 9;
                                        case 8: return 0;     // key = # like nothing pressed
                                       }
                        }
        }
return 0 ;
 }