oooooh boy, this is looking pretty slick. I'm kind-of impressed I was
able to throw this together in ~2 days of post-work hacking (though I
guess they were some pretty late-nights...)
There's really only one feature left that I _need_ to implement, which
is the on-disk persistence for selected mode. That shouldn't be too
tricky though...
https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/radial-controller-protocol-implementation
With a little bit of trial and error (and a crash-course in how the heck
HID even works), I figured out how to get the dial to provide haptic
feedback!
Along the way, I also learned that you can take advantage of the
(incorrectly named) Resolution Multiplier field to customize how many
"steps" the dial should have, offloading the work to the device itself!
Very cool!!
