Well, I got as far as building and flashing it, but my problem is my working 54l15 is part of a device already, and my spare is semi bricked, so I can’t non destructively connect my e-paper… new project figure out un softbricking.
For some reason the attached epaper driver fires up the motor controller, turns one direction, them the other and then just presents a serial terminal to my PC over usb… so it’s definitely trying to do stuff