Answered by:
USB CDC class device

Question
-
Hi,
I've read a lot of thread but I need some calrifications:
-I can't engage a dialog with a CDC device using the usbser.sys in metro app as I do not have access to a serial API.
-Are there other ways to communicate with such a device?
All I have for this device is an inf file with vendore/device ID and a reference to usbser.sys.
I am also interested in workarounds for my personal use.
thanks.- Edited by JM Cotte Thursday, April 26, 2012 11:06 AM
Thursday, April 26, 2012 11:05 AM
Answers
-
JM Cotte,
I have looked into this further. WinRT does not support serial and usbser.sys is not accessible from a Metro specialized device app.
Best Wishes - Eric
- Marked as answer by Eric Hanson-MSFTModerator Wednesday, June 6, 2012 5:46 AM
Wednesday, June 6, 2012 5:46 AMModerator
All replies
-
JM Cotte,
Are you the device manufacturer?
Best Wishes - Eric
Thursday, April 26, 2012 3:12 PMModerator -
Eric,
No, I am not the device manufacturer.
What I know is that the device uses this mode of communication in order to maintain backward compatibility with old software.Thanks
JM cotte.Thursday, April 26, 2012 3:27 PM -
JM Cotte,
What is the device? WinRT does not support serial and usbser.sys is not accessible from a Metro specialized device app.
Best Wishes - Eric
Thursday, April 26, 2012 4:13 PMModerator -
This is a measurement device for the industry.
If I get you right, there is no workaround as long as it make reference to usbser.sys and needs serial support.
More generally, Metro apps are a no no for CDC devices ?Thanks,
JM CotteThursday, April 26, 2012 6:50 PM -
JM Cotte,
Post back here in a couple of weeks. Perhaps there will be an update.
Best Wishes - Eric
Thursday, April 26, 2012 6:57 PMModerator -
Eric,
Thanks for your time, I'll get back to this forum for updates.
But as you don't answer no, this gives me hope.Best regards,
Jean-Marie CotteThursday, April 26, 2012 7:20 PM -
JM Cotte,
I have looked into this further. WinRT does not support serial and usbser.sys is not accessible from a Metro specialized device app.
Best Wishes - Eric
- Marked as answer by Eric Hanson-MSFTModerator Wednesday, June 6, 2012 5:46 AM
Wednesday, June 6, 2012 5:46 AMModerator -
For others out there - CDC is a common method used for easy/cheap serial port access for devices using a virtual serial port windows interface.
I'm no driver expert, but I know without its support small companies like mine wont be able to develop USB based devices for windows 8.
Please sort yourself out Microsoft - I wont be buying that new Surface tablet now!!Thursday, June 21, 2012 8:25 AM