Custom Marlin Firmware

Custom Marlin firmware for an Ender 3 Pro after I swapped in a Big Tree Tech board the stock firmware wouldn't run.

04 — 2023 · firmware · embedded-c · 3d-printing · marlin

Excerpt of the custom Marlin Configuration.h showing the BTT SKR Mini E3 board and TMC2209 driver defines

The Ender 3 Pro’s stock firmware won’t run a Big Tree Tech board, so I built my own Marlin from source. That meant mapping every pin, stepper driver, thermistor, and endstop to the new board by hand, then tuning the motion and safety limits until the printer ran clean.

Annotated pinout reference for the Big Tree Tech SKR Mini E3 V2.0 control board — Fig. 01 — BTT SKR Mini E3 V2.0 pinout reference for the board swap