Thanks for replying, the endpoint is bulk type. I am not sure whether
this 4096 is the maxpacketsize, but i am sure that the camera is
reading the data at 4096 bytes per packet. And when i use the USB
sniffer on windows, i get the packets with the size of 4096.
The obvious question is: do you immediately fire a new Read from inside
the read completion callback? that's what you should do for maximum
performance.
Also, you may want to try increasing the read size. Depending on your
device, this may or may not be reliable (I've been fiddling with lots
of various Palm handheld, and I ended up with a small read size because
some models have bugs others don't have and tend to freeze on large
reads).
So there, you're very much subject to the features/bugs on the camera
you're talking to.
Also, you should check whether you did all the initializations exactly
as Windows does them. I don't know your device, but it's easy to forget
sending a control packet at init time that will put the device in a
faster data transfer mode...
--
Florent Pillet http://www.florentpillet.com
Freelance software developer/consultant - Palm OS & Mac OS X
ICQ: 117292463 Skype: callto://florent.pillet
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