Oh nice I see the limitation he put on the division of the circle. nice. Honestly I never noticed that in that pic.
I don't what Q crumb these are from….i had the tabs open so yeah. You gotta solve the code.
But anyway here
https://elifesciences.org/articles/31311
https://www.nxp.com/products/analog/interfaces/uarts/dual-asynchronous-receiver-transmitter-duart:SCC68681