Human interface on SAMV71-Xplained-Ultra:
- Led 1 is on when USB OTG cable is plugged in and Vbus is present
- Led 1 is continuously on when a device is connected
- Led 0 blinks when USB host has checked and enabled CDC interface
- The blink is slow (1s) with low speed device
- The blink is normal (0.5s) with full speed device
- The blink is fast (0.25s) with high speed device
- Led 1 is on during data transfer between CDC and UART
1.8.5