// Bestimmt bis zu welchem PIN das Lauflicht laufen soll.
#define PINS  9

void setup() {
  // put your setup code here, to run once:
  for(int i = 2; i < (PINS + 1); i++)
  {
    pinMode(i, OUTPUT);
    digitalWrite(i, LOW);
  }
  Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
  long int portausgabe = 0xd3;

  Serial.print("Dezimal: ");
  Serial.println(portausgabe);
  Serial.print("Binary:  ");
  for(int c = PINS; c > 1;c--)
  {
    if(bitRead(portausgabe, c - 2)) 
    {
      Serial.print('1');
      digitalWrite(c, HIGH);
    }
    else
    {
      Serial.print('0');
      digitalWrite(c, LOW);
    }
  } 
  Serial.print("\n");/**/
  Serial.print("Hex:     0x");
  for(int i = 2; i > 0; i--)
  {
    switch((portausgabe & (i == 2 ? 0xF0 : 0x0F)) >> (i == 2 ? 4 : 0))
    {
      case 10: Serial.print("A"); break;
      case 11: Serial.print("B"); break;
      case 12: Serial.print("C"); break;
      case 13: Serial.print("D"); break;
      case 14: Serial.print("E"); break;
      case 15: Serial.print("F"); break;
      default: Serial.print((portausgabe & (i == 2 ? 0xF0 : 0x0F)) >> (i == 2 ? 4 : 0)); break;
    }
  }
  while(1);
}