[Elphel-support] Synchronizing with an external flash

[Alexandre Poltorak]

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
| 
| 
| 
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