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

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--- Comment #10 from Chris Holgate <chris@zynaptic.com> 2010-10-07 20:23:13 BST ---
Hi John,

(In reply to comment #9)
> Chris, with CYGDAT_IO_USB_SLAVE_CLASS_TYPE == "ACM", lsusb looks better (but
> scroll down for the problem):
> 
> Bus 004 Device 008: ID ffff:0001  
> Device Descriptor:
>   bLength                18
>   bDescriptorType         1
>   bcdUSB               2.00
>   bDeviceClass            2 Communications
>   bDeviceSubClass         0 
>   bDeviceProtocol         0 
>   bMaxPacketSize0         8
>   idVendor           0xffff 
>   idProduct          0x0001 
>   bcdDevice            0.00
>   iManufacturer           1 eCos
>   iProduct                2 eCos USB Serial Device
>   iSerial                 0 
>   bNumConfigurations      1
>   Configuration Descriptor:
>     bLength                 9
>     bDescriptorType         2
>     wTotalLength           48
>     bNumInterfaces          2
      ^^^^^^^^^^^^^^^^^^^^^^^^^

I think this is the problem, since the driver has not previously been tested
with multiple interface declarations.  Looks like there is a possible bug in
the driver which doesn't deal properly with this situation when setting up the
endpoints.  I should have some time this weekend to sort out a fix.

Chris.

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