--- Barry Twycross <email@hidden> wrote:
> At 2:38 AM -0800 1/6/05, She Jian, Chia wrote:
>
> >the problem may be that
> >the pipe is naking but i am not able to comfirm
> this
> >as i do not have a USB analyzer
>
> Without an Analyser there is no way to confirm this.
> NAKing would be
> the most likely explanation.
>
> If you've been assigned this project, it would be
> useful if whoever
> is assigning it would also provide proper tools for
> you to do the
> assignment. An analyser is the proper tool for this
> job.
>
> >am i able to derive the
> >access codes(ie: commands to capture image) through
> >the help of a usb sniffer program?
>
> There are sniffers available on Windows, there use
> is beyond the
> scope of this list. "USB Snoopy" is one which is
> mentioned a lot.
>
> So it seems not only have you been assigned a task
> without the proper
> tools, you've also not been provided with the proper
> documentation.
> While this may be quite realistic in terms of what
> happens in the
> real word, its not really a very good learning
> exercise.
>
> Who's assigning you this exercise in futility?
>
> >Question 3:
> >if i am able to dervie the access codes say, .. do
> i send this
> >command through the control pipe or
> >the bulk pipe?
>
> The obvious thing to do would be to do the same as
> what you're seeing
> the Windows driver do. If it sends something over
> the control pipe,
> send it over the control pipe, if its over the bulk
> pipe, use the
> bulk pipe. All you can do is slavishly follow what
> the driver you
> have is already doing.
>
> This is not a very satisfactory way of developing a
> driver, but it
> can be effective, I've done it myself.
>
> I'd guess given you don't know how to initialise the
> camera that it
> is NAKing in your first question. Until a device
> like this is
> properly configured all you'll typically get out of
> it is a NAK.
> --
hi!! thks alot for replying!!
gt some more question to ask hope that u guys dun
mind!
Question 1: if i were to send a message through the
control pipe, do i use writepipe to send it or do i
use
some other method to send it?
Question 2: how can i know or get the configurations
of the canera if i am not given the proper
documentations??
is it possible at all?
pls reply!! thks!!! :-)
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