[Elphel-support] camera triggering

[Alexandre Poltorak]

Sorry,

I forgot to tell, the LED is connected to pins 1 and 4 of the J15 connector.

Alexandre.

On Tue, Jun 22, 2010 at 9:27 PM, Alexandre Poltorak <alexandre at elphel.com>wrote:

> Hi,
>
> I am experimenting with camera triggering. First I am trying internal
> triggered mode where the FPGA trigger the sensor once per second + an
> external flash (in my case just a LED).
>
> My settings are:
> 5MPix JPEG color images, 200ms exposure time
>
> TRIG 4
> TRIG_OUT 800000
> TRIG_PERIOD 96000000
> TRIG_BITLENGTH 255
> XMIT_TIMESTAMP 1
>
> First of all it seems TRIG 4 must be applied separately after the other
> parameters. If not the compressor stop after the first frame.
>
> I see my led blinking once per second. The problem is that I can not see my
> led on the image. I tried to play with TRIG_DELAY. If I set the delay to
> 50000000 pixel clocks I can see the LED on ~4/5 of the image, on the last
> part of the image the LED is already OFF.
>
> I do not understand where exactly the trigger is before the exposure is
> started.
>
> More tests coming soon..
>
> Best regards,
> Alexandre
>
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