I have got my hands on an old at90usbkey.
It is still operational but its original firmware has been wiped out.
I would like to start a study of USB and LUFA.
I have installed the LUFA extension in AS6.1.
Now my question is where do I start?
Should I first read about USB?
I know that there are sample projects in LUFA but how to use them in AS6?
What is the best sample project to start out with given that I have an AT90USBKEY?
I am looking to learn about mass storage host/device and HIDs.