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CircuitPython library for MAX7219 LED matrix driver.

Project description


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CircuitPython driver for the MAX7219 LED matrix driver chip.

See here for the equivalent MicroPython driver.


This driver depends on:

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

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 adafruit-circuitpython-max7219

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

sudo pip3 install adafruit-circuitpython-max7219

To install in a virtual environment in your current project:

mkdir project-name && cd project-name
python3 -m venv .env
source .env/bin/activate
pip3 install adafruit-circuitpython-max7219

Usage Example

adafruit_max7219.Matrix8x8 Example

from adafruit_max7219 import matrices
from board import TX, RX, A2
import busio
import digitalio
import time

clk = RX
din = TX
cs = digitalio.DigitalInOut(A2)

spi = busio.SPI(clk, MOSI=din)
display = matrices.Matrix8x8(spi, cs)
while True:

    display.pixel(3, 3)
    display.pixel(3, 4)
    display.pixel(4, 3)
    display.pixel(4, 4)

    s = 'Hello, World!'
    for c in range(len(s)*8):

adafruit_max7219.BCDDigits Example

from adafruit_max7219 import bcddigits
from board import TX, RX, A2
import bitbangio
import digitalio

clk = RX
din = TX
cs = digitalio.DigitalInOut(A2)

spi = bitbangio.SPI(clk, MOSI=din)
display = bcddigits.BCDDigits(spi, cs, nDigits=8)


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


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

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