Hi All. Ive finally successfully installed openlane2 and run some initial examples which show a lot happening under the hood with this tool. I would like to get my hands a bit more dirty with the tool so would like to run it on say a 4bit counter. Does anyone have such an example or advice where I can start here? Thanks

I would start by modifying the SPM example. You will need to at a minimum change the

DESIGN_NAME

in

config.yaml

and the RTL code in

src/spm.v

. The one thing you have to watch out for is that in ASIC, more often than not, resets are active-low and asynchronous. For help writing RTL, try a large language model.

Great. So I will put in my .v code for a 4bit counter and take things from there.