Interfacing a PlayStation 2 (PS2) Controller with Arduino

I got a free PS2 controller, but with no PS2 to use it with I had to do SOMETHING with it, haha. That, of course, was taking it apart and using it with an Arduino as a control system.

Here is the inside:

Inside the connector:

Pinout Inside Controller 

Pinout of the connector:

You can see on the PCB which wires are for each pin. Then where the wires go on the connector.

Connections to Arduino:

These are using the PSX code below. they can be changed in code.
Arduino, PS2 PCB Label, Full Name, Color
13,,,,,,,,,, CLK,,,,,,,,,,,,,,,,, (Clock),,,,,,, Brown
11,,,,,,,,,, DO,,,,,,,,,,,,,,,,,,, (Command), Orange
10,,,,,,,,,, CS,,,,,,,,,,,,,,,,,,,, (Attention),,, Red
12,,,,,,,,,, DI,,,,,,,,,,,,,,,,,,,,, (Data),,,,,,,,,, Green
GND,,,,, GND,,,,,,,,,,,,,,,, (Ground),,,,,, Black
N/C,,,,,,,,ACK,,,,,,,,,,,, (Acknowledge),, White
3.3V,,,,,,,3.3v,,,,,,,,,,,,,,,,,, (3.3v),,,,,,,,,,, Yellow
7.5V,,,,,,,See Below,,,,,,,, See Below,,, Blue

7.5v triggers the feedback motor inside of the controller. Too use this you will have to use a digital pin to trigger a mosfet/transistor to supply the 7.5v. 

Code:

Get the library from here.

#include <PS2X_lib.h>  //for v1.6

PS2X ps2x; // create PS2 Controller Class

//right now, the library does NOT support hot pluggable controllers, meaning
//you must always either restart your Arduino after you conect the controller,
//or call config_gamepad(pins) again after connecting the controller.
int error = 0;
byte type = 0;
byte vibrate = 0;

void setup(){
 Serial.begin(57600);

 //CHANGES for v1.6 HERE!!! **************PAY ATTENTION*************

 error = ps2x.config_gamepad(13,11,10,12, true, true);   //setup pins and settings:  GamePad(clock, command, attention, data, Pressures?, Rumble?) check for error

 if(error == 0){
   Serial.println("Found Controller, configured successful");
   Serial.println("Try out all the buttons, X will vibrate the controller, faster as you press harder;");
  Serial.println("holding L1 or R1 will print out the analog stick values.");
  Serial.println("Go to www.billporter.info for updates and to report bugs.");
 }
 
  else if(error == 1)
   Serial.println("No controller found, check wiring, see readme.txt to enable debug. visit www.billporter.info for troubleshooting tips");
 
  else if(error == 2)
   Serial.println("Controller found but not accepting commands. see readme.txt to enable debug. Visit www.billporter.info for troubleshooting tips");
 
  else if(error == 3)
   Serial.println("Controller refusing to enter Pressures mode, may not support it. ");
 
   //Serial.print(ps2x.Analog(1), HEX);
 
   type = ps2x.readType();
     switch(type) {
       case 0:
        Serial.println("Unknown Controller type");
       break;
       case 1:
        Serial.println("DualShock Controller Found");
       break;
       case 2:
         Serial.println("GuitarHero Controller Found");
       break;
     }

}

void loop(){
   /* You must Read Gamepad to get new values
   Read GamePad and set vibration values
   ps2x.read_gamepad(small motor on/off, larger motor strenght from 0-255)
   if you don't enable the rumble, use ps2x.read_gamepad(); with no values
 
   you should call this at least once a second
   */
 
 
 
 if(error == 1) //skip loop if no controller found
  return;

 if(type == 2){ //Guitar Hero Controller
 
   ps2x.read_gamepad();          //read controller
 
   if(ps2x.ButtonPressed(GREEN_FRET))
     Serial.println("Green Fret Pressed");
   if(ps2x.ButtonPressed(RED_FRET))
     Serial.println("Red Fret Pressed");
   if(ps2x.ButtonPressed(YELLOW_FRET))
     Serial.println("Yellow Fret Pressed");
   if(ps2x.ButtonPressed(BLUE_FRET))
     Serial.println("Blue Fret Pressed");
   if(ps2x.ButtonPressed(ORANGE_FRET))
     Serial.println("Orange Fret Pressed");
   

    if(ps2x.ButtonPressed(STAR_POWER))
     Serial.println("Star Power Command");
 
    if(ps2x.Button(UP_STRUM))          //will be TRUE as long as button is pressed
     Serial.println("Up Strum");
    if(ps2x.Button(DOWN_STRUM))
     Serial.println("DOWN Strum");


    if(ps2x.Button(PSB_START))                   //will be TRUE as long as button is pressed
         Serial.println("Start is being held");
    if(ps2x.Button(PSB_SELECT))
         Serial.println("Select is being held");

 
    if(ps2x.Button(ORANGE_FRET)) // print stick value IF TRUE
    {
        Serial.print("Wammy Bar Position:");
        Serial.println(ps2x.Analog(WHAMMY_BAR), DEC);
    }
 }

 else { //DualShock Controller

    ps2x.read_gamepad(false, vibrate);          //read controller and set large motor to spin at 'vibrate' speed
 
    if(ps2x.Button(PSB_START))                   //will be TRUE as long as button is pressed
         Serial.println("Start is being held");
    if(ps2x.Button(PSB_SELECT))
         Serial.println("Select is being held");
       
       
     if(ps2x.Button(PSB_PAD_UP)) {         //will be TRUE as long as button is pressed
       Serial.print("Up held this hard: ");
       Serial.println(ps2x.Analog(PSAB_PAD_UP), DEC);
      }
      if(ps2x.Button(PSB_PAD_RIGHT)){
       Serial.print("Right held this hard: ");
        Serial.println(ps2x.Analog(PSAB_PAD_RIGHT), DEC);
      }
      if(ps2x.Button(PSB_PAD_LEFT)){
       Serial.print("LEFT held this hard: ");
        Serial.println(ps2x.Analog(PSAB_PAD_LEFT), DEC);
      }
      if(ps2x.Button(PSB_PAD_DOWN)){
       Serial.print("DOWN held this hard: ");
     Serial.println(ps2x.Analog(PSAB_PAD_DOWN), DEC);
      }

 
      vibrate = ps2x.Analog(PSAB_BLUE);        //this will set the large motor vibrate speed based on
                                              //how hard you press the blue (X) button  
 
    if (ps2x.NewButtonState())               //will be TRUE if any button changes state (on to off, or off to on)
    {
   
     
       
        if(ps2x.Button(PSB_L3))
         Serial.println("L3 pressed");
        if(ps2x.Button(PSB_R3))
         Serial.println("R3 pressed");
        if(ps2x.Button(PSB_L2))
         Serial.println("L2 pressed");
        if(ps2x.Button(PSB_R2))
         Serial.println("R2 pressed");
        if(ps2x.Button(PSB_GREEN))
         Serial.println("Triangle pressed");
       
    }
       
 
    if(ps2x.ButtonPressed(PSB_RED))             //will be TRUE if button was JUST pressed
         Serial.println("Circle just pressed");
       
    if(ps2x.ButtonReleased(PSB_PINK))             //will be TRUE if button was JUST released
         Serial.println("Square just released");  
 
    if(ps2x.NewButtonState(PSB_BLUE))            //will be TRUE if button was JUST pressed OR released
         Serial.println("X just changed");  
 
 
    if(ps2x.Button(PSB_L1) || ps2x.Button(PSB_R1)) // print stick values if either is TRUE
    {
        Serial.print("Stick Values:");
        Serial.print(ps2x.Analog(PSS_LY), DEC); //Left stick, Y axis. Other options: LX, RY, RX
        Serial.print(",");
        Serial.print(ps2x.Analog(PSS_LX), DEC);
        Serial.print(",");
        Serial.print(ps2x.Analog(PSS_RY), DEC);
        Serial.print(",");
        Serial.println(ps2x.Analog(PSS_RX), DEC);
    }
 
 
 }


 delay(50);
   
}