CircuitPython library for MAX7219 LED matrix driver.
Project description
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.
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.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.
Building locally
To build this library locally you’ll need to install the circuitpython-build-tools package.
python3 -m venv .env
source .env/bin/activate
pip install circuitpython-build-toolsOnce installed, make sure you are in the virtual environment:
source .env/bin/activateThen run the build:
circuitpython-build-bundles --filename_prefix adafruit-circuitpython-max7219 --library_location .Sphinx documentation
Sphinx is used to build the documentation based on rST files and comments in the code. First, install dependencies (feel free to reuse the virtual environment from above):
python3 -m venv .env
source .env/bin/activate
pip install Sphinx sphinx-rtd-themeNow, once you have the virtual environment activated:
cd docs
sphinx-build -E -W -b html . _build/htmlThis will output the documentation to docs/_build/html. Open the index.html in your browser to view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to locally verify it will pass.
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