[Elphel-support] Can't communicate with Elphel353

[Andrey Filippov]

Diana,

Your most likely problem is insufficient light. By default camera has
autoexposure turned on, so it increases the exposure time (up to the default
limit of 500ms) if it is too dark, and frame rate can never get higher than
1/Texposure. You may decrease that limit (i.e. in the camera GUI) to lower
value and increase analog gain (default is 2.0, can get up to 15.75 but in
that case there will be no room for white balancing).

You may easily see if the frame rate is limited by exposure - in the camera
GUI
http://wiki.elphel.com/index.php?title=File:Controls_with_blank.jpeg
there is frame rate indication near the top (2.5fps on the picture). If it
is green - the exposure is limited by the sensor/compressor (not a very good
example on the screenshot - such low fps is caused by external camera
synchronization, free running camera should have 10.8 fps in JPEG and just
under 15 fps in JP4 mode). If the fps color changes to red - the exposure is
a limiting factor.

If you have a low power computer/graphic card it can also limit the frame
rate. You may try
mplayer rtsp://192.168.0.9 -vo null
to test the frame rate without displaying images - in that case the
indicated frame rate will match the incoming stream.

Andrey




On Fri, Sep 2, 2011 at 10:05 AM, Diana Carrigan
<DianaEJohnson at maxim-ic.com>wrote:

> Looks like the serial port is working fine. Attached is a text file of the
> output of the serial port at bootup.****
>
> ** **
>
> We would like to set the camera up for 1280X720 image size at 30 fps. I was
> able to set the image size thru the Camera Interface, but I’m only seeing ~3
> fps.****
>
> What is the best way to setup the frame rate to be 30 fps, or is this some
> kind of limitation due to my Ethernet setup thru a switch box?****
>
> ** **
>
> Diana****
>
> ** **
>
> *From:* elphel at gmail.com [mailto:elphel at gmail.com] *On Behalf Of *Andrey
> Filippov
> *Sent:* Friday, September 02, 2011 9:52 AM
>
> *To:* Diana Carrigan; support-list at support.elphel.com
> *Cc:* Robert Kuzmak
>
> *Subject:* Re: [Elphel-support] Can't communicate with Elphel353****
>
> ** **
>
> Diana,
>
> It is very nice that you were able to fix the problem. But I'm still
> curious about the serial port console - did you make it work? What kind of
> output are you getting there?
>
> Andrey****
>
> On Fri, Sep 2, 2011 at 9:29 AM, Diana Carrigan <DianaEJohnson at maxim-ic.com>
> wrote:****
>
> Looks like I have fixed the problem The ribbon cable connected to the
> internal harddrive was loose. I reseated it.  Powered it up and everything
> is working now! I noticed it booted up really fast this time. In the past it
> did not.****
>
>  ****
>
> Thanks,****
>
>  ****
>
> Diana****
>
>  ****
>
> *From:* elphel at gmail.com [mailto:elphel at gmail.com] *On Behalf Of *Andrey
> Filippov
> *Sent:* Friday, September 02, 2011 9:18 AM
> *To:* Diana Carrigan****
>
>
> *Subject:* Re: [Elphel-support] Can't communicate with Elphel353****
>
>  ****
>
> Diana,
>
> So were you able to communicate via serial port? How did you do that? What
> was it exactly there? What happens on the serial port now?
>
> Andrey****
>
> On Fri, Sep 2, 2011 at 8:23 AM, Diana Carrigan <DianaEJohnson at maxim-ic.com>
> wrote:****
>
> Hi Andrey,****
>
>  ****
>
> I don’t think I configured anything. I just wanted to see if I could hook
> up thru the serial cable at the baud rate 115K and I could. Later in the
> day, I could no longer communicate via the Ethernet, so I power cycled.
> Since then nothing has worked.****
>
>  ****
>
> A couple of days ago, when I powered up the camera, it took three power
> cycles before the Ethernet communication started working.****
>
>  ****
>
> So I’m not sure what happened. Possibly a hardware issue?****
>
>  ****
>
> Diana****
>
> *From:* elphel at gmail.com [mailto:elphel at gmail.com] *On Behalf Of *Andrey
> Filippov
> *Sent:* Friday, September 02, 2011 8:17 AM
> *To:* Diana Carrigan; support-list at support.elphel.com
> *Subject:* Re: [Elphel-support] Can't communicate with Elphel353****
>
>  ****
>
>  ****
>
> On Fri, Sep 2, 2011 at 7:59 AM, Diana Carrigan <DianaEJohnson at maxim-ic.com>
> wrote:****
>
> We have not changed any code in the camera. I power cycled the camera and
> now we can not communicate to it thru Ethernet or the Serial cable connected
> to the 10369 IO board.****
>
>
> Diana, you wrote that the serial cable was connected to the camera. Before
> you lost communication with the camera - did you configure some terminal
> emulator (i.e. minicom) to see camera boot messages on the system console?
>
> If yes - what happens now on that port?
>
> The baud rate on the port is 115k.
>
> Andrey
>  ****
>
> Prior to power cycling the camera we could communicate and run video and
> camera applications. The Ethernet green and yellow lights are blinking, and
> the light on the power supply is green.****
>
>  ****
>
> Any suggestions?****
>
>  ****
>
> Diana Carrigan****
>
>
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> ****
>
>  ****
>
>
> _______________________________________________
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> ****
>
>  ****
>
>
> _______________________________________________
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> ****
>
> ** **
>
> _______________________________________________
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