spencerrightsma/picostep

Arduino library for controlling stepper motors with RP2040 through an H-bridge

PicoStep

PicoStep is an Arduino library for controlling stepper motors with RP2040-based boards using an H-bridge. Tested on an original Raspberry Pi Pico and an original Raspberry Pi Pico W, both with a L298N H-bridge.

This library depends on https://github.com/khoih-prog/RP2040_PWM/ for hardware pwm control.

Installation

You can find it in the Arduino IDE library manager, or on their website: https://reference.arduino.cc/reference/en/libraries/picostep/

Alternatively, one can include the source files directly in a project within the limitations of the GPL-3.0 license.

Supported features:

• Continuous rotation
• Bidirectional speed control
• Smooth, configurable acceleration
• Freewheeling (arm/disarm)
• Hardware PWM (using the RP2040_PWM library)
• Automatic microstepping (the crossover point to full stepping is configurable)
• Beep (using low frequency PWM to make noise while stationary)

Wishlist features:

• Positional control
• Step counting / odometer (also in continuous rotation mode)
• Alternative acceleration curves (currently hardcoded to be linear)