USB device stack

Dependents:   F401RE_USBMSD_RAM_copy

Fork of USBDevice by mbed official

test program:

Import programF401RE_USBMSD_RAM

USBMSD example with a file system located in RAM

Revision:
11:eeb3cbbaa996
Parent:
1:80ab0d068708
Child:
25:7c72828865f3