RawHID support

Something that would be very helpful in communicating with computer side frameworks as an alternative to VCP would be the possiblity to have a RawHID class. My understanding of USB is not too in-depth but afaik this would just mean a new descriptor that allows for a report of the maximum possible size to send buffers back and forth.

Right now I can already do this with the existing classes, I’m just limited to very few bytes per transaction and can’t receive something back. F.e. with the consumer key device:

import usb_hid

value = 4024
code = bytearray(2)
bytes = value.to_bytes(2,'big')
for device in usb_hid.devices:
            if device.usage_page == 0x0C and device.usage == 0x01:
                print('found consumer device')
                myDevice = device
                break
device.send_report(bytes)

I found this in the mpy docs but apart from this lonely docs page not much more and the pyb module does not seem to exist in CPY.

[dhalbert]

I started working on raw HID for a special project but it’s not at the top of my stack right now.

[timonsku]

@luolou this will only work on microcontrollers that have native USB device support and are supported by CircuitPython. No Laptop or Desktop computer will ever work with this library as they are not USB devices but USB hosts. This library only supports “emulating” HID devices which talk to a USB host like a laptop or desktop PC. E.g. a keyboard that plugs into your laptop. Your laptop is not capable of acting like a keyboard to another computer through a USB connection. If you have further questions please post them in the Adafruit Forums: https://forums.adafruit.com/viewforum.php?f=60 Or on the Adafruit Discord.