I have now commited an example application on github for anyone who want to give this a try.
Just flash it to an stm32f4-discovery board and hook it up to your USB-to-serial adapter and start the gui application.
There are some (hopefully) helpful comments in the target code that should explain how to use it on other processors/boards as well.
Generally, there are still some work to do when it comes to documentation. Maybe a short video might help understanding what you can do with this?