Introduction
CircuitPython driver for the MAX7219 LED matrix driver chip.
See here for the equivalent MicroPython driver.
Dependencies
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-max7219To install system-wide (this may be required in some cases):
sudo pip3 install adafruit-circuitpython-max7219To 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-max7219Usage 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.brightness(3)
display.fill(1)
display.pixel(3, 3)
display.pixel(3, 4)
display.pixel(4, 3)
display.pixel(4, 4)
display.show()
time.sleep(3.0)
display.clear_all()
s = 'Hello, World!'
for c in range(len(s)*8):
display.fill(0)
display.text(s,-c,0)
display.show()
time.sleep(0.25)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)
display.clear_all()
display.show_str(0,'{:9.2f}'.format(-1234.56))
display.show()Contributing
Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.
Documentation
For information on building library documentation, please check out this guide.
1 maintainer
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