He shows how to use a stepper motor as an ... one pulse will lead the other. In the other direction, the lead pulse will be reversed. There’s code to let an Arduino read the pulses.

Designed as a ‘shield’ to plug directly into the Arduino main board, the EVK integrates a HTSSOP-B28 packaged stepper motor drive IC and complements the company’s rapid prototyping ecosystem. The EVK ...

grbl is stepper motor controller firmware for ... in this further EinW blog My small cnc mill project needs motors (so I am told) that are too powerful for the normal drivers included on grbl Arduino ...