Once your Pi 5 is all set up and you've got the RGB Matrix panels all wired you're ready to test it out!
As always, you need to activate the virtual environment before running the example. If you haven't already then activate it like this.
source ~/venvs/blinka_venv/bin/activate
Next you can run the triple_matrix_active3_simpletest.py script embedded below.
python triple_matrix_active3_simpletest.py
#!/usr/bin/python3
# SPDX-FileCopyrightText: 2025 Tim Cocks for Adafruit Industries
#
# SPDX-License-Identifier: MIT
"""
Display a simple test pattern of 3 shapes on three 64x64 matrix panels
using Active3 compatible connections.
Run like this:
$ python triple_matrix_active3_simpletest.py
"""
import numpy as np
from PIL import Image, ImageDraw
import adafruit_blinka_raspberry_pi5_piomatter as piomatter
from adafruit_blinka_raspberry_pi5_piomatter.pixelmappers import simple_multilane_mapper
width = 64
n_lanes = 6
n_addr_lines = 5
height = n_lanes << n_addr_lines
pen_radius = 1
canvas = Image.new('RGB', (width, height), (0, 0, 0))
draw = ImageDraw.Draw(canvas)
pixelmap = simple_multilane_mapper(width, height, n_addr_lines, n_lanes)
geometry = piomatter.Geometry(width=width, height=height, n_addr_lines=n_addr_lines, n_planes=10, n_temporal_planes=4, map=pixelmap, n_lanes=n_lanes)
framebuffer = np.asarray(canvas) + 0 # Make a mutable copy
matrix = piomatter.PioMatter(colorspace=piomatter.Colorspace.RGB888Packed,
pinout=piomatter.Pinout.Active3,
framebuffer=framebuffer,
geometry=geometry)
draw.rectangle((8, 8, width-8, width-8), fill=0x008800)
draw.circle((32, 64+32), 22, fill=0x880000)
draw.polygon([(32, 136), (54, 180), (10, 180)], fill=0x000088)
framebuffer[:] = np.asarray(canvas)
matrix.show()
input("Press enter to exit")
Page last edited September 04, 2025
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