Pure C Arduino

A(rduino)OS (AOS) is an attempt to write a simple pre-emptive scheduler - mostly to learn about how such system works but it's a fully functional implementation which can be used in a practical way good as well. First of all, if you have no theoretical background about context switching I would recommend to have a look on a great description regarding schedulers published by avrfreaks: Multitasking on an AVR AOS depends on libpca - it uses some routines from it in order to avoid code duplication. It is completely written in C from scratch with a little of assembler (in order to realize context switching). It comes with a documentation and some examples as well, which is hosted along with the repository on github: AOS Doxygen documentation Overview Most of the pre-emptive schedulers (besides cooperative schedulers) is implements and is driven around a "tick" - an interrupt which happens periodically with a programmed frequency and which is responsible fo...