I spent 3-4 days trying to get something to work with simavr. The problems I ran into mostly revolved around not ever being able to get a build of an AVR simulator or emulator that could emulate the 32U4. There are some suggestions out there that at one point there was even a linux ‘virtual’ USB controller, so that such an emulator could appear as a USB device.
If you can get me a recipe to run a 32u4 simulator or emulator with the USB bits intact, I’d be thrilled to work with you to get further.
I’ve never played with simutron. (Or even heard of it.)
We wouldn’t necessarily need to model the atmega and both of the attinies it talks to over i2c to make this very, very useful.
At some point in the near future, I’d really like us to start to get at least some basic regression testing up and running using @craigdissel’s work.