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Usb Device Viewer x64

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Unread 12-01-2008, 12:59 PM   #1
Interdit
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Usb Device Viewer x64

Hello,

I'm having this error output on my built-in webcam Ricoh VCC7:

===>Device Descriptor<===
bLength: 0x12
bDescriptorType: 0x01
bcdUSB: 0x0200
bDeviceClass: 0xEF
*!*ERROR: Multi-interface Function code 239 used for device with no IAD
descriptors
bDeviceSubClass: 0x02
*!*ERROR: bDeviceSubClass of 2 is invalid
bDeviceProtocol: 0x01
bMaxPacketSize0: 0x40 = (64) Bytes
idVendor: 0x05CA = Ricoh Company Ltd.
idProduct: 0x183A
bcdDevice: 0x0100
iManufacturer: 0x00
iProduct: 0x00
iSerialNumber: 0x00
bNumConfigurations: 0x01

How could I debug more or find the cause ?

Thanks a lot,
Francois
 
Unread 12-01-2008, 01:00 PM   #2
chris.aseltine@gmail.com
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Re: Usb Device Viewer x64

On Jan 3, 8:16 am, Interdit <Inter...@discussions.microsoft.com>
wrote:

> I'm having this error output on my built-in webcam Ricoh VCC7:
>
> ===>Device Descriptor<===
> bDeviceClass: 0xEF
> *!*ERROR: Multi-interface Function code 239 used for device with no IAD
> descriptors
>
> How could I debug more or find the cause ?


It sounds like your device is trying to report itself as a composite
device requiring grouping of certain interfaces into actual functions,
but is lacking the proper descriptors for this purpose.
 
Unread 12-01-2008, 01:00 PM   #3
Interdit
Guest
 
Posts: n/a
Re: Usb Device Viewer x64

Yes I have one USB Composite Device under USB and one Sony Motion Eye VCC7
under imaging, do you think it's normal to have two records for one webcam ?

I will try to find if it's normal....

Thanks,
Francois

"chris.aseltine***********" wrote:

> On Jan 3, 8:16 am, Interdit <Inter...@discussions.microsoft.com>
> wrote:
>
> > I'm having this error output on my built-in webcam Ricoh VCC7:
> >
> > ===>Device Descriptor<===
> > bDeviceClass: 0xEF
> > *!*ERROR: Multi-interface Function code 239 used for device with no IAD
> > descriptors
> >
> > How could I debug more or find the cause ?

>
> It sounds like your device is trying to report itself as a composite
> device requiring grouping of certain interfaces into actual functions,
> but is lacking the proper descriptors for this purpose.
>

 
Unread 12-01-2008, 01:05 PM   #4
chris.aseltine@gmail.com
Guest
 
Posts: n/a
Re: Usb Device Viewer x64

On Jan 3, 1:33 pm, Interdit <Inter...@discussions.microsoft.com>
wrote:

> Yes I have one USB Composite Device under USB and one Sony Motion Eye VCC7
> under imaging, do you think it's normal to have two records for one webcam ?


Normal? Well, I don't know, but perhaps it exposes a standard
"imaging" interface and then some sort of "control" or "debug"
interface with which some sort of monitor application interacts. Just
a guess.

Or the second interface could be USB audio (i.e. for a microphone) --
if you dump the config descriptor, we can probably guess.
 
Unread 12-01-2008, 01:10 PM   #5
Interdit
Guest
 
Posts: n/a
Re: Usb Device Viewer x64

Hi,

In this output :

===>Video Streaming Uncompressed Format Type Descriptor<===
bLength: 0x1B
bDescriptorType: 0x24
bDescriptorSubtype: 0x04
bFormatIndex: 0x01
bNumFrameDescriptors: 0x04
guidFormat: {32595559-0000-0010-8000-00AA00389B71} =
YUY2 Format
bBitsPerPixel: 0x10
bDefaultFrameIndex: 0x00
bAspectRatioX: 0x00
bAspectRatioY: 0x00
bmInterlaceFlags: 0x02
D0 = 0x00 Interlaced stream or variable: No
D1 = 0x01 Fields per frame: 1 field
D2 = 0x00 Field 1 first: No
D3 = 0x00 Reserved
D4..5 = 0x00 Field patterns -> Field 1 only
D6..7 = 0x00 Display Mode -> Bob only
bCopyProtect: 0x00 -> Duplication Unrestricted


What is the bDefaultFrameIndex for ? How can I change to 01 ?

Thanks,
Francois

"chris.aseltine***********" wrote:

> On Jan 3, 1:33 pm, Interdit <Inter...@discussions.microsoft.com>
> wrote:
>
> > Yes I have one USB Composite Device under USB and one Sony Motion Eye VCC7
> > under imaging, do you think it's normal to have two records for one webcam ?

>
> Normal? Well, I don't know, but perhaps it exposes a standard
> "imaging" interface and then some sort of "control" or "debug"
> interface with which some sort of monitor application interacts. Just
> a guess.
>
> Or the second interface could be USB audio (i.e. for a microphone) --
> if you dump the config descriptor, we can probably guess.
>

 
 

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