[Elphel-support] Synchronizing with an external flash

[Andrey Filippov]

Hello Eric,
"TRIG_PERIOD = 1" means single trigger mode  (camera can not work at
96000000 fps - period is measured in pixel clock cycles, normally
96MHz), in this mode you may still trigger the camera with
http://192.168.0.9:8081/trig/pointers (assuming 192.168.0.9)

The camvc program freezes, because it used all the php instances (by
default - 3, that number can be increased at the expense of more
memory used), and the php scrips (as camvc.php) are waiting for the
camera to be triggered). You can unfreeze the camera over telnet with
"killall -9 lighttpd" - the web server will be automatically restarted
together with the php instances.
Port 8081 (in http://192.168.0.9:8081/trig/pointers) is used by
another server (imgsrv) that does not need php running.

Andrey

On Tue, Jul 24, 2012 at 10:15 AM, Eric Boudrand <dev at boudrand.net> wrote:
> Hi,
>
> When I set :
> TRIG = 4
> TRIG_PERIOD = 1
> TRIG_CONDITION = 0
> TRIG_OUT = 0x800000
> I lose http connection to the camvc.html. Ping is working. I can restart
> the camera, but the settings are not kept. Any idea ?
>
> Regards.
>
> Éric Boudrand
>
>
>
> Le mardi 24 juillet 2012 à 12:12 +0200, Alexandre Poltorak a écrit :
>> Hi Eric,
>>
>> TRIG_PERIOD - defines FPS (1/frame period; FPS = 96000000 / TRIG_PERIOD)
>> Example: 3840000 [decimal] for 25FPS
>>
>> Best regards,
>> Alexandre
>>
>> ----- Mail original -----
>> | De: "Eric Boudrand" <dev at boudrand.net>
>> | À: "Oleg" <support-list at support.elphel.com>
>> | Envoyé: Mardi 24 Juillet 2012 11:05:10
>> | Objet: Re: [Elphel-support] Synchronizing with an external flash
>> |
>> | Hi Oleg
>> |
>> | > You might have seen the schematics -
>> | > http://wiki.elphel.com/images/9/9a/10369a.pdf
>> | >
>> | I haven't seen it. Thanks.
>> |
>> | > So, you get 5V only on the PIN 4 of J15. TRIG_OUT=0x800000.
>> |
>> | Ok. I'am using this now. I have resolder the cable and I got 5V on
>> | the
>> | output despite the fact I made a mistake in the configuration. I set
>> | 0x800000 in decimal value of TRIG_OUT.
>> |
>> | > PINs 2 & 3 need an external power source. They are galvanically
>> | > decoupled with the camera's circuitry. GPIO[10] controls a diod.
>> | > So if you would like to use PIN2 you should connect: V+=>PIN3,
>> | > PIN2=>FLASH=>GND.
>> | >
>> | > TRIG_OUT should be 0x200000. Each GPIO has 2 bits in this register.
>> | > You probably saw this page as well -
>> | > http://wiki.elphel.com/index.php?title=Trigger
>> | >
>> | I have read this page. But, it is not clear. I do not understand how
>> | TRIG_OUT is computed. I will use the values from the page.
>> |
>> | Concerning TRIG_PERIOD, if I set 0x500, does this value means 1280
>> | sec ?
>> |
>> | Regards.
>> |
>> | Éric Boudrand
>> |
>> |
>> |
>> | _______________________________________________
>> | Support-list mailing list
>> | Support-list at support.elphel.com
>> | http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>> |
>
>
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