usbser.sys driver not working on Windows 7

[niharikasingh]

We have developed custom USB 1.1 CDC class device, and we are using usbser.sys driver which comes with the Windows to test our device. We have written small application along with the USB decoding section of the design, it basically receives lower case letter which sent from Host PC with the help of tera term (application we are using to test our device) and sends back to the Host by converting it into upper case. This we have tested in Windows XP, it works great. But we are facing issue with the Windows 7 64-bit, device is getting detected and driver for the same is getting installed, however data transfer is not happening like the way it does in Windows XP.

Could anyone please suggest what is going wrong?

Thanks,
Niharika

 

[Gandalf]

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