I want to use it to access the stallguard status (i.e., is the motor stalled). It’s a feature of the TMC2209 that allows for limit-switch-less homing. There’s a s/w version of the stallguard result, but it is…odd. Anyway, I’m hoping to avoid recreating the s/w stack needed to access the UART since I literally have everything else coded and more or less done (refinement aside). I may just throw in the towel and hook up the hardware (I do have the extra pins, but I’m into the funky half pins that are a PITA to solder to (I’m using pin headers so as to allow microcontroller replacement if needed), and things are getting tight inside my housing!)
Imma gonna experiment with creating a library branch - just to test, of course 