Introduction

Pixel Mapper for Adafruit_CircuitPython_LED_Animation

This library provides custom pixel mappers for use with the Adafruit CircuitPython LED Animation library.

The built-in mappers only support arranging multiple matrices in the direction the internal LED strip is physically wired. This library extends that functionality by allowing you to stack panels vertically or horizontally, regardless of wiring direction.

You can also apply optional x and y offsets, making it easier to treat sections of a larger matrix as independent regions — without manually defining complex pixel maps.

Key Features

Combine multiple LED panels into vertical or horizontal matrix layouts

Support for snaking layouts (e.g. zigzag wiring patterns)

Optional x/y offsets for sub-matrix mapping

Compatible with Adafruit's CircuitPython LED Animation library

Dependencies

This driver depends on:

• Adafruit CircuitPython

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle or individual libraries can be installed using circup.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install circuitpython-pixel-mapper

To install system-wide (this may be required in some cases):

sudo pip3 install circuitpython-pixel-mapper

To install in a virtual environment in your current project:

mkdir project-name && cd project-name
python3 -m venv .venv
source .env/bin/activate
pip3 install circuitpython-pixel-mapper

Installing to a Connected CircuitPython Device with Circup

Make sure that you have circup installed in your Python environment. Install it with the following command if necessary:

pip3 install circup

With circup installed and your CircuitPython device connected use the following command to install:

circup install pixel_mapper

Or the following command to update an existing version:

circup update

Usage Example

import board
import neopixel

from adafruit_led_animation import helper
from adafruit_led_animation.animation.chase import Chase
from adafruit_led_animation.animation.comet import Comet
from adafruit_led_animation.animation.rainbowchase import RainbowChase
from adafruit_led_animation.animation.rainbowcomet import RainbowComet
from adafruit_led_animation.color import AMBER, JADE, PURPLE, RED, GREEN, BLUE,OLD_LACE,ORANGE
from pixel_mapper import vertical_stacked_panels_mapper

# Update to match the pin connected to your NeoPixels
pixel_pin = board.GP2
# Update to match the number of NeoPixels you have connected
pixel_num = 1024

pixels = neopixel.NeoPixel(pixel_pin, pixel_num, brightness=0.75, auto_write=False)
pixels.fill((0, 0, 0))

pixel_wing_top_left = helper.PixelMap.horizontal_lines(
    pixels,
    16,
    16,
    vertical_stacked_panels_mapper(32, 32, panel_height=8, reverse=True, x_offset=16, y_offset=16),
)

pixel_wing_botom_left = helper.PixelMap.horizontal_lines(
    pixels,
    16,
    16,
    vertical_stacked_panels_mapper(32, 32, panel_height=8, reverse=True, x_offset=16)
)

pixel_wing_top_right = helper.PixelMap.horizontal_lines(
    pixels,
    16,
    16,
    vertical_stacked_panels_mapper(32, 32, panel_height=8, reverse=True, y_offset=16),
)

pixel_wing_botom_right = helper.PixelMap.horizontal_lines(
    pixels,
    16,
    16,
    vertical_stacked_panels_mapper(32, 32, panel_height=8, reverse=True)
)

comet = Comet(pixel_wing_top_left, speed=0.1, color=AMBER, tail_length=6, bounce=True)
chase = Chase(pixel_wing_botom_left, speed=0.1, size=3, spacing=6, color=JADE)
rainbow_chase = RainbowChase(pixel_wing_top_right, speed=0.1, size=3, spacing=2, step=8)
rainbow_comet = RainbowComet(pixel_wing_botom_right, speed=0.05, tail_length=7, bounce=True)

while True:
    comet.animate()
    chase.animate()
    rainbow_chase.animate()
    rainbow_comet.animate()

Documentation

API documentation for this library can be found on Read the Docs.

For information on building library documentation, please check out this guide.

Contributing

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.