Work with motor controller?

[philipp-cloudproduce]

It would be great if this library could be made to work with stepper motor controllers like the DRV8825. The number of GPIO pins that is needed is smaller than the number needed to speak to stepper motors directly. You usually have a pin for the STEP PWM, a pin for direction, and a pin to sleep the motor so that is stops drawing current. But the sleep pin is often shared across all the motors you need. So it would be great to use your really great and precise API to drive a controller to move a precise number of steps.