USB Serial cable with CDC support

Posted by Harsha on Stack Overflow See other posts from Stack Overflow or by Harsha
Published on 2010-03-23T04:12:29Z Indexed on 2010/03/23 4:21 UTC
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Filed under:

CDC

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usb

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usbserial

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Hardware

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driver

Hi All,

I bought a USB to Serial cable which claims to be CDC compliant.

But the bInterfaceClass value in interface descriptor is 0xFF(which is vendor specific). I was expecting it to be 0x02 (Communications and CDC control).

In the device manager, i found that the drivers being loaded are ser2pl.sys and serenum.sys. I had learnt usbser.sys is the windows CDC driver, but it was not loaded for my cable.

I am pretty much new to this CDC, so i have following questions

1.Does this indicate that the cable is not CDC compliant 2.Can i make this cable CDC compliant (since CDC is a driver functionality), by loading usbser.sys. If yes how?

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