Here it is! The AT90USB646-based homebrew programmable logic controller. It’s not quite a Simatic S7 (and it’s not even completed in most parts), but it’s
After looking at the Beremiz iec2c compiler source, I decided that modifying it to fit into this project is probably not the way to go.
Few years ago when I was searching the net for similar projects to gather some stuff for my potential graduate thesis, there was just a