[Elphel-support] External triggering

[Oleg]

Dear Ángel,

*J15 - SYNC EXTERNAL (RJ14 telephone-style connector)*

Go to page: http://192.168.0.9/parsedit.php,
then "External trigger controls" (there are tips for each parameter on mouse
over).

You can switch on internal trigger generator with a programmed period.

For external triggering  you need to configure GPIO[10] to receive the
trigger signal - set TRIG_CONDITION to 0x200000.

TRIG_CONDITION is a 22-bit register where 2 bits are used for programming
each GPIO (from 0 to 11, e.g., TRIG_CONDITION[1:0] will program GPIO[0]) -
MSB enables input and LSB selects active trigger signal level. Btw, 3.3V
should be enough.

If you want to generate trigger pulse from the camera, program GPIO[11] -
set TRIG_OUT=0x800000 (same as in TRIG_CONDITION register - MSB enables and
LSB selects level).

And set TRIG=0x4.

You can also try -
http://192.168.0.9/sync.php?role=detect&channel=external- it will set
GPIO[10] & GPIO[11] and you'll just need to set the TRIG
parameter after.

Best regards,
Oleg

On 2 February 2010 05:07, Ángel <elphriend at gmail.com> wrote:

> Hi, elphriends:
>
> Can I trigger the camera acquisition via RJ14 connector and, for example, a
> function generator?
>
> I don't understand very well the information provided by
> http://www3.elphel.com/wiki/10369#J15_-_SYNC_.28external.29
>
> Thank you,
>
> Ángel.
>
> --
> Elphel NC353L-369 (12-36 VDC) + Computar H2Z0414C-MP
>
> _______________________________________________
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>
>
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