Waveshare HAT - User Manual

Stepper Motor HAT User Manual
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Stepper Motor HAT
User Manual
OVERVIEW
Stepper Motor HAT is designed for Raspberry Pi, can drives two stepper motors and
support up to 1/32 microstepping
FEATURES
⚫ Raspberry Pi connectivity, compatible with Raspberry Pi Zero/Zero W/Zero
WH/2B/3B/3B+
⚫ Onboard dual DRV8825 motor controller IC with built-in microstepping indexer,
drives two stepper motors, easy to use
⚫ 6 available microstepping modes, configured with the DIP switches: full-step, half-
step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
⚫ Adjustable motor drive current via potentiometer, maximum 2.5A current output
⚫ Protection features: Overcurrent Protection (OCP), Thermal Shutdown (TSD), VM
Undervoltage Lockout (UVLO)
⚫ Integrates 5V regulator, allows providing power to Raspberry Pi
⚫ Onboard multi connector options for stepper motors in different specifications
⚫ Comes with development resources and manual (examples in BCM2835, wiringPi,
and python)

Waveshare HAT Specifications

General

Logic voltage	3.3V
Motor channel	2
Resolution	12-bit
Interface	I2C
Operating voltage	5V
Input Voltage	5V
Dimensions	65mm x 30mm
Compatibility	Raspberry Pi

Summary

Hardware

Pinout

Details the function of each pin on the Stepper Motor HAT board.

Power

Motor Driver

Microstepping

DRV8825

Explains how the DRV8825 controls motor rotation via pulses and microstepping.

Demo Codes

Libraries Installation

Instructions for installing necessary libraries like wiringPi and BCM2835.

Setting

Microstepping Configuration

Explains microstepping configuration via software or DIP switches.

Current Setting

Running Demo Code

BCM2835

Commands to run demo code using BCM2835 library.

WiringPi

Python

Codes

Initializing BCM2835 and Setting Pins

Choose Motor

Setting Microstepping

Code snippet for setting microstepping mode.

Steps

Stop Rotating

Exception Handling

Python

Codes (Python)

Set Microstepping (Python)

Python code for setting microstepping parameters.

Steps (Python)

Stop (Python)

FAQ

Why the Motor and Chips on Modules Get Serious Hot?

Explains why the motor and chips get hot during operation.

Can this Module be Used to Drive 42 or 57 Motors?

Why Doesnt Motor Work and Only Shake Left and Right?

Why Do Motor Desynchronize?

How to Switch Control Type?