Added examples for the Keyboard library of the Leonardo

Author: tigoe

KeyboardMessage/KeyboardMessage.ino

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+/* 
+ Keyboard Button test
+ 
+ Sends a text string when a button is pressed.
+ 
+ The circuit:
+ * pushbutton attached from pin 4 to +5V
+ * 10-kilohm resistor attached from pin 4 to ground
+ 
+ created 24 Oct 2011
+ by Tom Igoe
+ 
+ This example code is in the public domain.
+ 
+ http://www.arduino.cc/en/Tutorial/KeyboardButton
+ */
+
+const int buttonPin = 4;          // input pin for pushbutton
+int previousButtonState = HIGH;   // for checking the state of a pushButton
+int counter = 0;                  // button push counter
+
+void setup() {
+  // make the pushButton pin an input:
+  pinMode(buttonPin, INPUT);
+}
+
+void loop() {
+  // read the pushbutton:
+  int buttonState = digitalRead(buttonPin);
+  // if the button state has changed, 
+  if ((buttonState != previousButtonState) 
+  // and it's currently pressed:
+    && (buttonState == HIGH)) {
+      // increment the button counter
+    counter++;
+    // type out a message
+    Keyboard.print("You pressed the button: ");
+    Keyboard.print(counter); 
+    Keyboard.println(" times.");
+  }
+  // save the current button state for comparison next time:
+  previousButtonState = buttonState; 
+}

KeyboardSerial/KeyboardSerial.ino

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+/* 
+ Keyboard test
+ 
+ Reads a byte from the serial port, sends a keystroke back.
+ The sent keystroke is one higher than what's received, e.g.
+ if you send a, you get b, send A you get B, and so forth.
+ 
+ The circuit:
+ * none
+ 
+ created 21 Oct 2011
+ by Tom Igoe
+ 
+This example code is in the public domain.
+ 
+ http://www.arduino.cc/en/Tutorial/KeyboardSerial
+ */
+
+void setup() {
+  // open the serial port:
+Serial.begin(9600);
+}
+
+void loop() {
+  // check for incoming serial data:
+  if (Serial.available() > 0) {
+    // read incoming serial data:
+    char inChar = Serial.read();
+    // Type the next ASCII value from what you received:
+    Keyboard.write(inChar+1);
+  }  
+}
+