Added Keycode example

examples/HID/Keyboard_Keycode/Keyboard_Keycode.ino

@@ -0,0 +1,56 @@
+/*
+ Copyright (c) 2014 NicoHood
+ See the readme for credit to other people.
+
+ Keyboard Keycode example
+
+ Press a button to write some text to your pc.
+ This example is made for advanced users, to add specific keys to the HID report.
+ See official and HID Project and USB docs documentation for more infos
+ https://github.com/NicoHood/HID/wiki/Keyboard-API
+ http://www.usb.org/developers/hidpage/Hut1_12v2.pdf
+*/
+
+const int pinLed = LED_BUILTIN;
+const int pinButton = 2;
+
+void setup() {
+  pinMode(pinLed, OUTPUT);
+  pinMode(pinButton, INPUT_PULLUP);
+
+  // Sends a clean report to the host. This is important on any Arduino type.
+  Keyboard.begin();
+}
+
+void loop() {
+  if (!digitalRead(pinButton)) {
+    digitalWrite(pinLed, HIGH);
+
+    // the "normal" way
+    //Keyboard.println("Test");
+
+    // press 'a' via normal API
+    //Keyboard.write('a');
+
+    // press 'a' via keycodes
+    Keyboard.writeKeycode(0x04);
+
+    // press the contect menu button via normal API
+    //Keyboard.write(KEY_MENU);
+
+    // press the context menu button via keycodes (right mouse click)
+    //Keyboard.writeKeycode(0x65);
+
+    // You can also try some specific keys that do not work on every OS
+    /*
+    #define HID_KEYBOARD_MUTE	0x7F
+    #define HID_KEYBOARD_VOLUME_UP	0x80
+    #define HID_KEYBOARD_VOLUME_DOWN	0x81
+    */
+    //Keyboard.writeKeycode(0x7F);
+
+    // simple debounce
+    delay(300);
+    digitalWrite(pinLed, LOW);
+  }
+}