Human interface on SAM4S-EK2:
- Led 0 (D2, blue) blinks when USB host has checked and enabled HID and MSC interface
- Led 1 (D4, green) is on during read/write operation
- No mouse buttons are linked
- USRPB1 (BP2) and USRPB2 (BP3) are used to move mouse left and right
- Only both buttons down opens a notepad application on Windows O.S. and sends key sequence "Atmel ARM"
- Only a low level on J13.PA15 will generate a wakeup to USB Host in remote wakeup mode.