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What's the difference between DEVINTERFACE_USB_DEVICE and WinUSB?

See original GitHub issue

I noticed there are 3 type devices defined in WindowsDeviceConstants.cs

public static Guid GUID_DEVINTERFACE_HID = new Guid("4D1E55B2-F16F-11CF-88CB-001111000030");
public static Guid GUID_DEVINTERFACE_USB_DEVICE = new Guid("A5DCBF10-6530-11D2-901F-00C04FB951ED");
public static Guid WinUSBGuid = new Guid("dee824ef-729b-4a0e-9c14-b7117d33a817");

So, what’s the difference between DEVINTERFACE_USB_DEVICE and WinUSB?

Issue Analytics

State:
Created 5 years ago
Reactions:2
Comments:7 (5 by maintainers)

Top GitHub Comments

2reactions

st-arnoldcommented, Jan 14, 2020

EDIT: I think I figured it out now; only devices using WinUsb driver are supported so that is the reason for the GUID choice. I didn’t have any such devices connected at first (except “Billboard device” related to USB type-C, which should be a WinUsb device according to Device Manager, but doesn’t show up for some reason). Maybe the documentation could be made more clear on this?

I just struggled with a problem where no USB devices at all were listed when using WinUSB GUID:

After changing the GUID in WindowsDeviceFactoryBase.cs GetConnectedDeviceDefinitionsAsync

//var guidString = GetClassGuid().ToString(); var guidString = WindowsDeviceConstants.GUID_DEVINTERFACE_USB_DEVICE.ToString();

now devices get listed:

Running on Windows Desktop (Win 10 Pro ver 1903, build 18362.535) Usb.Net.WindowsSample but commented out HID and serial port device factories and enabled DebugLogger LogToConsole. Device.Net version 3.1.0

0reactions

MelbourneDevelopercommented, Jan 14, 2020

@st-arnold thanks for letting me know. I’d be keen to know if you can connect to any of those devices. I’ve been able to enumerate them in the past, but I only get errors when I connect. If you can connect to one, I’ll look at adding the guid to the library.