[ros-users] call for testing: camera1394 in C-turtle

[Andrew Harris]

Hi Eric,

   I don't currently have a UVC webcam, I'll try to dig one up.  I've
been running the same camera with an EEE pc (intel atom) for a year
now, with the camera1394 node working well with no troubles at all.

-andrew

On Wed, Nov 24, 2010 at 9:16 PM, Eric Perko <wisesage5001 at gmail.com> wrote:
> Does it happen with other USB cameras? For example, a UVC compatible webcam
> (big list of supported devices here: http://www.ideasonboard.org/uvc/ )?
> Perhaps the problem is just the IIDC over USB driver on ARM? Do you get
> similar errors on an x86 PC?
> - Eric
>
> On Wed, Nov 24, 2010 at 9:06 PM, Andrew Harris <andrew.unit at gmail.com>
> wrote:
>>
>> Hi -
>>
>>   So after some more tinkering, the problems I have been having with
>> my Point Grey Chameleon on the beagleboard xm don't have anything to
>> do with the camera.  The problems seem to be the beagleboard xm and
>> it's USB interface.  I am getting messages like:
>>
>> "[11646.000000] usb 1-2: device descriptor read/64, error -71"
>>
>>   which I thought were due to the camera, but I have plugged in
>> another device and I get the same messages.  It seems like keyboards
>> and mice and other simple things work fine, but "more complex" things
>> for some value of complex seem not to work on the beagleboard xm.
>>
>>   The problem is somewhat intermittent -- I've got at least two
>> bagfiles that show camera1394 working OK on the beagleboard xm with
>> the Point Grey Chameleon doing IIDC over USB.  But I am certainly not
>> going to use this set up for an autonomous robot at this point!
>>
>> regards,
>> -andrew
>>
>> On Tue, Nov 23, 2010 at 1:28 AM, Andrew Harris <andrew.unit at gmail.com>
>> wrote:
>> > On Mon, Nov 22, 2010 at 11:31 PM, Eric Perko <wisesage5001 at gmail.com>
>> > wrote:
>> >> There is a wiki page that talks about some of the alignment issues that
>> >> have
>> >> come up with ROS on ARM.
>> >> http://www.ros.org/wiki/eros/alignment (take a look at the linked
>> >> ticket as
>> >> well). Also take a look at this
>> >>
>> >> thread: http://code.ros.org/lurker/thread/20101122.232925.f0d885ce.en.html and
>> >> perhaps try the -msoft-float option and see if that changes anything.
>> >
>> > Hi Eric,
>> >
>> >   Thanks for the suggestion.  I applied Josh's patch, and that seems
>> > to have fixed the problem within dynamic_reconfigure.  I think
>> > camera1394 might be working now -- I'm getting some intermittent
>> > results because I think my camera may be occasionally exceeding the
>> > power limits of the USB host bus on the beagleboard.  I am going to
>> > try connecting the camera to a powered hub and see if I can get more
>> > reliable results.  Thanks to you both again for your help.
>> >
>> > regards,
>> > -andrew
>> >
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