This is a library for using the I²C-based LED matrices with the HT16K33 chip. It supports both 16x8 and 8x8 matrices, as well as 7- and 14-segment displays.
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.
# Import all board pins and bus interface. import board import busio # Import the HT16K33 LED matrix module. from adafruit_ht16k33 import matrix # Create the I2C interface. i2c = busio.I2C(board.SCL, board.SDA) # Create the matrix class. # This creates a 16x8 matrix: matrix = matrix.Matrix16x8(i2c) # Or this creates a 8x8 matrix: #matrix = matrix.Matrix8x8(i2c) # Or this creates a 8x8 bicolor matrix: #matrix = matrix.Matrix8x8x2 # Finally you can optionally specify a custom I2C address of the HT16k33 like: #matrix = matrix.Matrix16x8(i2c, address=0x70) # Clear the matrix. matrix.fill(0) # Set a pixel in the origin 0,0 position. matrix[0, 0] = 1 # Set a pixel in the middle 8, 4 position. matrix[8, 4] = 1 # Set a pixel in the opposite 15, 7 position. matrix[15, 7] = 1 matrix.show() # Change the brightness matrix.brightness = 8 # Set the blink rate matrix.blink_rate = 2
Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.
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-tools
Once installed, make sure you are in the virtual environment:
Then run the build:
circuitpython-build-bundles --filename_prefix adafruit-circuitpython-ht16k33 --library_location .
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-theme
Now, once you have the virtual environment activated:
cd docs sphinx-build -E -W -b html . _build/html
This 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.