This project started out as an assembly project for Cortex-M3 but we never got past the Python reference stage. It is now abandoned.
The code has encrypt() and decrypt() functions that take arbitrary keys and block contents. It was written for Python2.7 and will not work in Python3 since it uses strings as character arrays to represent data.
The Python reference implementation is functional. No efforts have been made to achieve speed or to defend against side-channel analysis or any other kind of attack.