USB device stack

Dependents:   mbed-mX-USB-TEST1 USBMSD_SD_HID_HelloWorld HidTest MIDI_usb_bridge ... more

This pull request has been accepted and merged in by Anna Bridge

Support for STM32F446 Nucleo-64 added

Support for STM32F446 Nucleo-64 added.

Fork of official USBDevice with support for STM32F446 Nucleo-64 added. Nucleo, STM32F446, USBDevice