Thank you for the fast reply, Dave!
After a quick research I learned that the ht16k33 lib is especially for a LED matrix. I thought this lib is a fat repository in circuitpython‘s core.
I am looking for a general way to get more space on the Gemma m0 board and thought about thinning the core out and using only the components I need for my project. For example, I don't need a windows driver or the audio stuff.
Background:
I‘m building the firewalker 2.0 project
https://learn.adafruit.com/gemma-led-sneakers but with a Neopixel 24 ring RGBW instead of the Neopixel Strip.
I want to use the vibration sensor to trigger randomly led animations from
https://github.com/adafruit/Adafruit_Ci ... _Animation But there not enough memory for even a single animation
Any recommendations?