Arduino accessory switch for Steven/PS3

accessorySwitch.pde

/*
  Button
 
 Turns on and off a light emitting diode(LED) connected to digital  
 pin 13, when pressing a pushbutton attached to pin 2. 
 
 
 The circuit:
 * LED attached from pin 13 to ground 
 * pushbutton attached to pin 2 from +5V
 * 10K resistor attached to pin 2 from ground
 
 * Note: on most Arduinos there is already an LED on the board
 attached to pin 13.
 
 
 created 2005
 by DojoDave <http://www.0j0.org>
 modified 28 Oct 2010
 by Tom Igoe
 
 This example code is in the public domain.
 
 http://www.arduino.cc/en/Tutorial/Button
 */

// constants won't change. They're used here to 
// set pin numbers:
const int ledPin =  13;      // the number of the LED pin

// variables will change:
int switchPins[] = {
  12,11,10};
int switchStates[] = {
  0,0,0};
int prevStates[] = {
  0,0,0};
  
char onValues[] = {'A','B','C'};
char offValues[] = {'a','b','c'};


void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);      
  // initialize the pushbutton pin as an input:
  for(int i=0;i<3;i++){
    pinMode(switchPins[i], INPUT);  
  }
  Serial.begin(9600);  
}

void loop(){
  // read the state of the pushbutton value:
  for(int i=0;i<3;i++){
    switchStates[i] = digitalRead(switchPins[i]);

    // check if the pushbutton is pressed.
    // if it is, the buttonState is HIGH:
    if (switchStates[i] == HIGH) {     
      // turn LED on:    
      digitalWrite(ledPin, HIGH); 
      Serial.print(onValues[i]);
    } 
    else {
      // turn LED off:
      if (prevStates[i] == HIGH){
        Serial.print(offValues[i]);
      }
      digitalWrite(ledPin, LOW); 

    }

    prevStates[i] = switchStates[i];

  }

  //buttonState = digitalRead(buttonPin);


}