On 10/08/2010 03:59 PM, ext Brett Werling wrote:
On Fri, Oct 8, 2010 at 1:12 AM, Roger Quadros<roger.quadros@xxxxxxxxx> wrote:
Hi,
On 10/07/2010 07:34 PM, ext Brett Werling wrote:
Does anyone know what the status is on the requirement of the MS OS
Descriptor?
I don't think MS OS descriptor is required any more since now MTP is an
approved USB Class. i.e. it has to use the PTP Class code.
The host should identify if the PTP device supports MTP extensions and
identify the device as MTP.
However, if you fail to use MS OS descriptor, leagcy Windows OS'es will
identify your device as PTP only, unless you supply a .inf file to load the
MTP drivers for your device.
Will my device appear to the hose as a PTP device then? What can be
Probably yes, if you use PTP class codes.
done if I only want to support MTP and then fall back to MSC? i.e. -
I'd rather not have a prompt saying my device is a digital still
camera or something along these lines.
No idea.
I've noticed some devices that I've tested used the vendor specific
interface device class, and yet Win 7 and Win XP didn't ask for an OS
descriptor. Is this possibly because Windows recognizes the
manufacturer/model and knows to load the proper MTP driver?
I don't know how windows behaves. Probably it knows about the device already, or
has cached the information. check the inf files, remove them if they match the
device and retry.
--
regards,
-roger
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