* VBUS events, the library attempts to determine the connection state via the bus suspension and wake up events instead. This however may be\r
* slightly inaccurate due to the possibility of the host suspending the bus while the device is still connected. If accurate connection status is\r
* required, the VBUS line of the USB connector should be routed to an AVR pin to detect its level, so that the USB_DeviceState global\r
* VBUS events, the library attempts to determine the connection state via the bus suspension and wake up events instead. This however may be\r
* slightly inaccurate due to the possibility of the host suspending the bus while the device is still connected. If accurate connection status is\r
* required, the VBUS line of the USB connector should be routed to an AVR pin to detect its level, so that the USB_DeviceState global\r