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Bulk In on Windows8 | Cypress Semiconductor

Bulk In on Windows8

Summary: 2 Replies, Latest post by nbridger on 09 Mar 2015 04:42 PM PDT
Verified Answers: 0
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nbridger's picture
4 posts

Does anyone have Bulk In working with Windows 8? I have an application that has worked for years on XP and 7 but simply will not work with Windows 8. Ive tried with the same hardware on both win 7 and 8 - with CyUSB and with CyUSB3 - the win8 installation always fails Bulk In request with 997.
Im suspecting a URB issue, but just want to know if Im chasing the impossible or not?

VAVC's picture
Cypress Employee
506 posts

 Which USB controleer are you using?


use USBlyzer to check the USB trace.


if you are getting 997 means probably there is no data in the BULK endpoint .




nbridger's picture
4 posts

part number: CY7C68013A100AXC-TQFP100

I have used Microsoft Message Analyzer - that shows the Bulk In Request was Cancelled. IT says "URB information missing". Helpfully it doesn't say what is missing though. I will try with the analyser you suggested.
The board works perfectly well with windows xp & windows 7.

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