int bin[] = { 5, 4, 3, 2 };
int pot_vals[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; 

int analog_in = 0;
int swap_pin = 8;
int print_pin = 9;

void setup() {
  
  Serial.begin(9600);
  for (int i = 0; i < 4; i++) {
    pinMode(bin[i], OUTPUT);
  }
  pinMode(swap_pin, INPUT);
  pinMode(print_pin, INPUT);
  
}

void loop() {

  if (Serial.available() > 0) {
    
    byte in_byte = Serial.read();
    for (int i = 0; i < 10; i++) {
      for (int j = 0; j < 4; j++) {
        if (i & (1 << j)) {
          digitalWrite(bin[j], HIGH);
        }
        else {
          digitalWrite(bin[j], LOW);
        }      
      }
      Serial.print(analogRead(analog_in)/4); Serial.print(",");
    }
    Serial.print(digitalRead(swap_pin)); Serial.print(",");
    Serial.print(digitalRead(print_pin));
    Serial.print(13, BYTE);

  }    
  
}