Hello Yilin Sun,
Thank you for reaching out to the Open Specifications team to report this issue with [MS-USBEPD]. I will investigate this issue and post my findings here soon.
Regards,
Sreekanth Nadendla
Microsoft Open Specifications
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Hi,
We are trying to implement MS-USBEPD(https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-usbepd/7c4ff9b4-229e-4606-95ab-9384d1382465) to our USB device stack.
Although we have successfully added Microsoft OS 2.0 descriptors and corresponding Compatible ID (PLATDET) to the descriptor (we are able to verify this in the Registry), we didn't observe any vendor-specific control request sent by the host using bRequest = 0xE0 as described in the documentation.
As this seems to be a new open specification in additional to the USB 3.2 protocol and the specification itself was published not long ago (Apr. 2024), we would like to know the current host-side implementation status on Windows platform and the support matrix across the OS revisions.
Thanks & Best Regards,
Yilin Sun
Hello Yilin Sun,
Thank you for reaching out to the Open Specifications team to report this issue with [MS-USBEPD]. I will investigate this issue and post my findings here soon.
Regards,
Sreekanth Nadendla
Microsoft Open Specifications