31 May
2017
31 May
'17
8:17 p.m.
Respectfully, if you can't understand the protocol, you're out of your depth and need to tackle something simpler and build up to this. Take the scenic route, it will reward you better. Trust me -- I speak from experience on this -- you'll wind up with a half-completed project that doesn't work and you don't know why. I have a dozen or so of those in my past.
As for the Teensy... yes, one for mouse, one for keyboard. Use a touch panel for a small LCD for the touchscreen. There's really no way to combine them without getting into proprietary chips from eg Holtek -- and since those chips are proprietary and therefore expensive and hard to get, you're thankful that you can use a pair of Teensies ;)