HID example needs updating

[arnans]

Since the read operation of HID devices has recently changed, the current joystick example is broken. When a joystick is plugged in, I see that it is recognized (the green dot appears). But all the values return 0. I have tried to implement the new callback approach but was not successful.

A working example would be very useful. Ultimately, I'm trying to connect Scratchx to a HID microcontroller platform. Getting the joystick example working is a good start.