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Date:      Tue, 19 Aug 2008 23:07:13 +0100
From:      Dieter <freebsd@sopwith.solgatos.com>
To:        Sean Bruno <sbruno@miralink.com>
Cc:        Scott Long <scottl@samsco.org>, freebsd-firewire@freebsd.org
Subject:   Re: Something broke :-( Re: fwcontrol update 
Message-ID:  <200808200607.GAA01246@sopwith.solgatos.com>
In-Reply-To: Your message of "Tue, 19 Aug 2008 17:11:01 PDT." <48AB6115.6090308@miralink.com> 

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> >>> I notice that it doesn't print every generation.
> >>> I notice that the node_id changes.
> >>>       
> >> This alarms me quite a bit.  I didn't think there was anyway for the 
> >> generation to change
> >> without the log message being spit out.  Interesting.
> >>     
> >
> > Perhaps there is some register on the controller chip that
> > affects receiving data but not sending it, and isn't getting
> > initialized.  Perhaps the controller chip thinks it is receiving
> > bad data, and flags an error or requests a bus reset?
> >
> > If the resets are happening faster than the printf can run,
> > maybe the data (generation number) changes underneath the printf,
> > much like ps/top don't get a pure snapshot?
> >   
> Hrm...First, let's try and get your camera working again.
>
> I would like you to try and connect your camera to a Mac, Linux or 
> Windows box and try to get it working again.

As far as I can tell the camera is working fine.

For example I can send DV data *to* the camera over firewire and it
happily converts it to analog and ships it out s-video to the TV.

And the data *from* the camera is recognized as DV:

	fwcontrol_prev -u 1 -R camera.dv
	Detected DV format on input.
	(EAGAIN)
	(EAGAIN)
	(EAGAIN)

The camera was of course powered off while I tested the argument
range checks.  And I only ran tests that seemed safe.  I'm not
*completely* insane.



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