How to uniquely identify a USB-HID device ?
in [Device Drivers]
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From: Leo Havmøller on 15 Jan 2010 01:42 > I cannot use VID and PID numbers since > there may be several similar devices connected to the system. Use the device serial number - thats what it's for. Leo Havmøller.
From: Maxim S. Shatskih on 15 Jan 2010 04:02 > I need to identify the USB port number to which the USB-HID device is USB is just conceptually not designed to use numbered ports. If, for instance, the laptop has several USB ports, then _the idea is that the same device will work the same way_ regardless of the port it is connected too. Several USB ports provide a nearly complete illusion of electric parallelism. So, it is not a good idea to use USB port numbers anywhere. Use device instances instead, strongly tied to the device's embedded unique ID and not the port it is connected too. This is well-supported in Windows using PnP. -- Maxim S. Shatskih Windows DDK MVP maxim(a)storagecraft.com http://www.storagecraft.com
From: MAV on 15 Jan 2010 20:24 I have generic USB keyboards and mice and also PS\2 keyboards and mice connected through USB<->PS\2 adapter. Neither of those have serial number. "Leo Havmøller" wrote: > > I cannot use VID and PID numbers since > > there may be several similar devices connected to the system. > > Use the device serial number - thats what it's for. > > Leo Havmøller. >
From: MAV on 15 Jan 2010 20:28 "Maxim S. Shatskih" wrote: > So, it is not a good idea to use USB port numbers anywhere. Use device instances instead, strongly tied to the device's embedded unique ID and not the port it is connected too. This is well-supported in Windows using PnP. I need a number or device ID that will not change every time the system starts up. Could you please tell me how to retrieve such unique ID for generic USB keyboard given a device name "\.\Device\000000XXX"? Maybe to send some IOCTL's ?
From: Pavel A. on 15 Jan 2010 22:14
"MAV" <MAV(a)discussions.microsoft.com> wrote in message news:EEA7C21F-BB9B-4BF9-985F-F69293D238D8(a)microsoft.com... > I have generic USB keyboards and mice and also PS\2 keyboards and mice > connected through USB<->PS\2 adapter. Neither of those have serial number. Then maybe look at the USBview WDK sample program. It collects the USB tree structure, and devices attached to each node. --pa > "Leo Havmøller" wrote: > >> > I cannot use VID and PID numbers since >> > there may be several similar devices connected to the system. >> >> Use the device serial number - thats what it's for. >> >> Leo Havmøller. >> |