There are a couple of packages which integrate Dynamo with AutoCAD. As far as I’m aware, they bring AutoCAD into Revit, but you should be able to utilise their methods to generate geometry in AutoCAD. If you look at LinkDWG you’ll see that it often background opens AutoCAD and runs Commands and LISP.
Here is an example of me writing my own code, LinkDWG have since added this functionality to their package…