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kmk_firmware/docs/pimoroni_trackball.md
tonasz 827862b34b Pimoroni Trackball draft module
2022-02-08 13:23:35 -08:00

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Pimoroni Trackball

Module handles usage of Trackball Breakout by Pimoroni.

Product page: https://shop.pimoroni.com/products/trackball-breakout

Usage

Declare I2C bus and add this module in your main class.

from kmk.modules.pimoroni_trackball import Trackball, TrackballMode
import bitbangio as io

i2c = io.I2C(scl=board.D3, sda=board.D2)
trackball = Trackball(i2c, mode=TrackballMode.MOUSE_MODE)

Theoretically, it should work with normal IO library, but I encountered some issues on my RP2040 board.

import busio as io

i2c = io.I2C(scl=board.D3, sda=board.D2)

Setup backlight color using below commands:

trackball.set_rgbw(r, g, b, w)
trackball.set_red(brightness)
trackball.set_green(brightness)
trackball.set_blue(brightness)
trackball.set_white(brightness)

This module exposes one keycode TB_MODE, which on hold switches between MOUSE_MODE and SCROLL_MODE.