#include "macros.h"
 
#define UP_DOWN PINB4
#define INC_DEC PINB7
 
unsigned char convertBCD(unsigned char value){
  unsigned char BCD = 0b00000000;
  int i = 0;
  unsigned char decs = (value/10)%10;
  unsigned char units = value%10;
  while(i<4){
    BCD = BCD | (getValue(units, (3-i))<<(i+4));
    BCD = BCD | (getValue(decs, (3-i))<<i); i++;
  }
  return BCD;
}
 
unsigned char value = 0;
 
size_t millisCurrent = 0;
size_t millisButton = 0;
 
void setup () {
  DDRD = (OUTPUT<<DDD7) |
         (OUTPUT<<DDD6) |
         (OUTPUT<<DDD5) |
         (OUTPUT<<DDD4) |
         (OUTPUT<<DDD3) |
         (OUTPUT<<DDD2) |
         (OUTPUT<<DDD1) |
         (OUTPUT<<DDD0) ;
  PORTD = 0b00000000;
 
  DDRB = (INPUT<<DDB4)|
         (INPUT<<DDB7);
}
 
void loop() {
millisCurrent = millis();
  if(getValue(PINB, UP_DOWN) && (millisCurrent - millisButton) > 200){
    millisButton = millisCurrent;
    if(getValue(PINB, INC_DEC)) value--;
    else value++;
    if(value >> 7) value = 0;
    if(value > 99) value = 99;
    PORTD = convertBCD(value);
  }
}⏎