Build Instructions

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• 1

  Arduino Code, by Jim Lindblom

  /* HID Joystick Mouse Example
     by: Jim Lindblom
     date: 1/12/2012
     license: MIT License - Feel free to use this code for any purpose.
     No restrictions. Just keep this license if you go on to use this
     code in your future endeavors! Reuse and share.
  
     This is very simplistic code that allows you to turn the
     SparkFun Thumb Joystick (http://www.sparkfun.com/products/9032)
     into an HID Mouse. The select button on the joystick is set up
     as the mouse left click.
  */
  #include <mouse.h>
  int horzPin = A0;  // Analog output of horizontal joystick pin
  int vertPin = A1;  // Analog output of vertical joystick pin
  int selPin = 3;  // select button pin of joystick
  int rclPin = 2;  // select button pin of joystick
  
  int vertZero, horzZero;  // Stores the initial value of each axis, usually around 512
  int vertValue, horzValue;  // Stores current analog output of each axis
  const int sensitivity = 100;  // Higher sensitivity value = slower mouse, should be <= about 500
  int mouseClickFlag = 0;
  int rightClickFlag = 0;
  
  //int invertMouse = -1;        //Invert joystick based on orientation
  int invertMouse = -1;         //Noninverted joystick based on orientation
  
  void setup()
  {
    pinMode(horzPin, INPUT);  // Set both analog pins as inputs
    pinMode(vertPin, INPUT);
    pinMode(selPin, INPUT);  // set button select pin as input
    digitalWrite(selPin, HIGH);  // Pull button select pin high
    pinMode(rclPin, INPUT);  // set button select pin as input
    digitalWrite(rclPin, HIGH);  // Pull button select pin high
    delay(1000);  // short delay to let outputs settle
    vertZero = analogRead(vertPin);  // get the initial values
    horzZero = analogRead(horzPin);  // Joystick should be in neutral position when reading these
  
    Mouse.begin(); //Init mouse emulation
  }
  
  void loop()
  {
    vertValue = analogRead(vertPin) - vertZero;  // read vertical offset
    horzValue = analogRead(horzPin) - horzZero;  // read horizontal offset
  
    if (vertValue != 0)
      Mouse.move(0, (invertMouse * (vertValue / sensitivity)), 0); // move mouse on y axis
    if (horzValue != 0)
      Mouse.move(((horzValue / sensitivity)), 0, 0); // move mouse on x axis
  
    if ((digitalRead(selPin) == 0) && (!mouseClickFlag))  // if the joystick button is pressed
    {
      mouseClickFlag = 1;
      Mouse.press(MOUSE_LEFT);  // click the left button down
    }
    else if ((digitalRead(selPin)) && (mouseClickFlag)) // if the joystick button is not pressed
    {
      mouseClickFlag = 0;
      Mouse.release(MOUSE_LEFT);  // release the left button
    }
  
    if ((digitalRead(rclPin) == 0) && (!rightClickFlag))  // if the joystick button is pressed
    {
      rightClickFlag = 1;
      Mouse.press(MOUSE_RIGHT);  // click the left button down
    }
    else if ((digitalRead(rclPin)) && (rightClickFlag)) // if the joystick button is not pressed
    {
      rightClickFlag = 0;
      Mouse.release(MOUSE_RIGHT);  // release the left button
    }
  }</mouse.h>

• 2

  Assembly Steps

  Print enclosure and file down inner tracks so that the joystick PCB slides in easily

  De-solder pins from joystick breakout board

  Use wires to make the following solder connections:

  Solder GND on Joystick to GND on Arduino

  Solder 5V on Joystick to VCC on Arduino

  Solder VRX on Joystick to A0 on Arduino

  Solder VRY on Joystick to A1 on Arduino

  Solder SW on Joystick to Pin 9 on Arduino

  Solder tac button to Arduino using GND and Pin 2, insulate with heat shrink tubing

  Connect Adruino to PC and upload code using Arduino IDE

  Disconnect and reconnect Arduino and it should be detected as a mouse input

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