This is a reimplementation of the trackball firmware, which hopefully makes the mouse a bit more comfortable to use. It features:

[cuu]

https://forum.clockworkpi.com/t/keyboard-firmware-trackball-and-tutorial/8908

• A simple interrupt counter coupled with a low-pass filter to smooth out the (x,y) position;
• An exponential “scaling” function to make slow movements be more precise and keep fast movements of the cursor;
• Less code: debouncer.ino, glider.ino and ratemeter.ino were removed, since they aren’t used anymore (because I couldn’t figure out how they work);
• The mouse wheel was reimplemented and decoupled from the cursor.