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  CP2102 - WHQL testing failed (VCP)

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Author Topic:   CP2102 - WHQL testing failed (VCP)
novotnyp
New Member 		posted July 30, 2010 04:53 AM     Click Here to See the Profile for novotnyp   Click Here to Email novotnyp     Edit/Delete Message
Hi,
my USB to UART with CP2102 with latest VCP drivers (6.1) don't pass Microsoft WHQL testing in USB Device Framework (CV) test. This problem was discussed here with USBExpress drivers, but I didn't find any solution how to fix it with VCP drivers. All other WHQL test are passed, this is the only one failed. I wrote e-mail also to Silabs technical support week before, but I have no reply from them till today.
Thank you for all ideas. Drivers are installed on WIN7 x64 Proffesional system.

Peter

This is my error log from WLK to 'Bad feature test':
Error 7.30.2010 1:43:38.868 odp. (1.1.21) Devices must respond with a Request Error to SetFeature requests that specify an invalid feature selector.
File: d:\5429t\testsrc\driverstest\usb\compliancetools\usbcheck\usbcommandverifier\source\badfeature.cpp Line: 114
Error Type: BOOL
Error Code: 0x0
Error Text: Error 0x00000000

Error 7.30.2010 1:43:38.868 odp. (1.1.22) Devices must respond with a Request Error to ClearFeature requests that specify an invalid feature selector.
File: d:\5429t\testsrc\driverstest\usb\compliancetools\usbcheck\usbcommandverifier\source\badfeature.cpp Line: 185
Error Type: BOOL
Error Code: 0x0
Error Text: Error 0x00000000

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Tsuneo
Member 		posted July 31, 2010 01:10 AM     Click Here to See the Profile for Tsuneo   Click Here to Email Tsuneo     Edit/Delete Message
It should be fixed on "firmware" of CP210x, not on the VCP (or USBXpress) device driver, if the error messages correctly describe the test procedures. MS seems to make the test stricter from WLK version to version. MS should fix so many of their "out of spec" first.

Maybe, SiLabs have come across the same problem, when they passed their device drivers to WHQL testing. As they passed it, SiLabs have applied "firmware" version up to the recent revision of CP210x.

Confirm it to SiLabs. If new revision has been released, request a couple of chips of the revision just to pass to WLK test.

It's trivial "out of spec". You don't need to replace entire lot.

Tsuneo

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