[Bug 1001024] STM32 USB driver and proposed USB API change

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--- Comment #8 from Chris Holgate <chris@zynaptic.com> 2010-09-17 19:02:53 BST ---
Hi John,

(In reply to comment #7)
> Chris, thank you for the attachments. I've been experimenting with them and
> have reached the point where my linux box is recognising the connection of a
> serial device:
> 
> "Vendor Specific Class" doesn't look good. Are there any clues here as to the
> problem? I am adding Frank Pagliughi (eCos USB slave serial author) to the CC
> list in case he has some insights on how to debug this.

Looking at the reported endpoints, I'm guessing that you need to set
CYGDAT_IO_USB_SLAVE_CLASS_TYPE to ACM to get the standard serial class driver
setup.  The generic option appears to set the class field to 'vendor specific'
- presumably because omitting the interrupt endpoint renders it non-compliant
with the spec.

I suspect that there are plenty of 'vendor specific' USB products out there
which are really just serial ports under the hood, and where the vendor drivers
are only there to map them to a generic COM/TTY port.

Chris.

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