Human interface on SAM3X-EK:
- Led 0 (D2, blue) blinks when USB host has checked and enabled HID and MSC interface
- Led 1 (D3, green) is on during read operation
- Led 2 (D4, amber) is on during write operation
- LEFT CLICK (BP5) and RIGHT CLICK (BP4) are used to move mouse left and right
- RIGHT CLICK (BP4) can be used to wakeup USB Host in remote wakeup mode.