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:
2:34856a6adb5b
Child:
18:78bdbce94509