I previously wrote about using the 8x8 LED matrix with the BeagleBone Black and visualizing Facebook notifications on the matrix. Adafruit has an interesting tutorial about using multiple 8x8 LED matrix displays together:
The above tutorial was written for the Arduino , but I wanted to control multiple Adafruit 8x8 LED matrix displays with the BeagleBone Black . I lucked out when I found Matt Hassel's LED Stock Ticker project for the Raspberry Pi . He built upon the Adafruit Python library for the 8x8 matrix and wrote new code to handle scrolling text across multiple displays. I was able to get Matt Hassel's Python code to run on the BeagleBone Black, and I reworked bi-color matrix code to work with the single color 8x8 matrix displays like my red model. Here is my GitHub repo for all of my Adafruit LED backpack (8x8 matrix & 7-segment) projects for the BBB:
A Python program, ticker.py, will scroll a message across the matrix displays. Before running it, follow Adafruit's instructions to install their Adafruit-BeagleBone-IO-Python library:
Next follow these instructions on the BeagleBone:
git clone git://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code.git
git clone git://github.com/pdp7/beaglebackpack.git
bash ./ticker.sh -r "Happy Holidays 2013"
The message should then scroll across the two displays: