added arduino, modified build

arduino/libraries/Esplora/examples/Experts/EsploraKart/EsploraKart.ino

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+/*
+  Esplora Kart
+
+  This sketch turns the Esplora into a PC game pad.
+
+  It uses the both the analog joystick and the four switches.
+  By moving the joystick in a direction or by pressing a switch,
+  the PC will "see" that a key is pressed. If the PC is running
+  a game that has keyboard input, the Esplora can control it.
+
+  The default configuration is suitable for SuperTuxKart, an
+  open-source racing game. It can be downloaded from
+  http://supertuxkart.sourceforge.net/ .
+
+  Created on 22 november 2012
+  By Enrico Gueli <enrico.gueli@gmail.com>
+*/
+
+
+#include <Esplora.h>
+
+/*
+  You're going to handle eight different buttons. You'll use arrays,
+  which are ordered lists of variables with a fixed size. Each array
+  has an index (counting from 0) to keep track of the position
+  you're reading in the array, and each position can contain a number.
+
+  This code uses three different arrays: one for the buttons you'll read;
+  a second to hold the current states of those buttons; and a third to hold
+  the keystrokes associated with each button.
+ */
+
+/*
+  This array holds the last sensed state of each of the buttons
+  you're reading.
+  Later in the code, you'll read the button states, and compare them
+  to the previous states that are stored in this array. If the two
+  states are different, it means that the button was either
+  pressed or released.
+ */
+boolean buttonStates[8];
+
+/*
+  This array holds the names of the buttons being read.
+  Later in the sketch, you'll use these names with
+  the method Esplora.readButton(x), where x
+  is one of these buttons.
+ */
+const byte buttons[] = {
+  JOYSTICK_DOWN,
+  JOYSTICK_LEFT,
+  JOYSTICK_UP,
+  JOYSTICK_RIGHT,
+  SWITCH_RIGHT, // fire
+  SWITCH_LEFT, // bend
+  SWITCH_UP, // nitro
+  SWITCH_DOWN, // look back
+};
+
+/*
+  This array tells what keystroke to send to the PC when a
+  button is pressed.
+  If you look at this array and the above one, you can see that
+  the "cursor down" keystroke is sent when the joystick is moved
+  down, the "cursor up" keystroke when the joystick is moved up
+  and so on.
+*/
+const char keystrokes[] = {
+  KEY_DOWN_ARROW,
+  KEY_LEFT_ARROW,
+  KEY_UP_ARROW,
+  KEY_RIGHT_ARROW,
+  ' ',
+  'V',
+  'N',
+  'B'
+};
+
+/*
+  This is code is run only at startup, to initialize the
+  virtual USB keyboard.
+*/
+void setup() {
+  Keyboard.begin();
+}
+
+/*
+  After setup() is finished, this code is run continuously.
+  Here we continuously check if something happened with the
+  buttons.
+*/
+void loop() {
+
+  // Iterate through all the buttons:
+  for (byte thisButton = 0; thisButton < 8; thisButton++) {
+    boolean lastState = buttonStates[thisButton];
+    boolean newState = Esplora.readButton(buttons[thisButton]);
+    if (lastState != newState) { // Something changed!
+      /*
+        The Keyboard library allows you to "press" and "release" the
+        keys as two distinct actions. These actions can be
+        linked to the buttons we're handling.
+       */
+      if (newState == PRESSED) {
+        Keyboard.press(keystrokes[thisButton]);
+      }
+      else if (newState == RELEASED) {
+        Keyboard.release(keystrokes[thisButton]);
+      }
+    }
+
+    // Store the new button state, so you can sense a difference later:
+    buttonStates[thisButton] = newState;
+  }
+
+  /*
+    Wait a little bit (50ms) between a check and another.
+    When a mechanical switch is pressed or released, the
+    contacts may bounce very rapidly. If the check is done too
+    fast, these bounces may be confused as multiple presses and
+    may lead to unexpected behaviour.
+   */
+  delay(50);
+}
+