Human interface on SAM3X-EK :
- Led 0 (D2, blue) blinks when USB Host have checked and enabled HID Keyboard interface
- Led 1 (D3, green) displays caps lock status.
- The LEFT CLICK (BP5) opens a notepad application on Windows O.S. and sends key sequence "Atmel ARM"
- RIGHT CLICK (BP4) can be used to wakeup USB Host in remote wakeup mode.