FAQ FAQ  Forum Search   Events   Register Register  Login Login

A7iv Rev engineer multi interface flash protocol
Author
  Topic Search Topic Search  Topic Options Topic Options
Josef_Underwater View Drop Down
Newbie
Newbie

Joined: 23 December 2023
Status: Offline
Posts: 3 		Post Options Post Options   Quote Josef_Underwater Quote  Post ReplyReply Direct Link To This Post Topic: A7iv Rev engineer multi interface flash protocol
    Posted: 23 December 2023 at 12:30
Dear All,
I work on decoding the multi interface flash protocol to diy a converter from Sony A7iv to optic fibre (connecting to underwater strobe).
Already have recorded signals for stand-by and trigger communication between camera and strobe. So, timings and HEX data available.

IŽm looking now for fellows, who can help interpret the gathered data.

Based on that, IŽll design microcontroller firmware to talk to the camera.

Anyone keen on sharing?
Best! Josef
 



Back to Top
neilt3 View Drop Down
Senior Member
Senior Member

Joined: 13 September 2010
Country: United Kingdom
Location: Manchester.U.K
Status: Offline
Posts: 3574 		Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 23 December 2023 at 13:14
Welcome to the forum .

Presumably you've already seen the information on this website regards pin layout ?

https://www.mhohner.de/sony-minolta/flashcomp_techref.php#multi

Other than that , I can't help .
see my photostream on flickr;
http://www.flickr.com/photos/neilt3/
C & C welcome.
Back to Top
Josef_Underwater View Drop Down
Newbie
Newbie

Joined: 23 December 2023
Status: Offline
Posts: 3 		Post Options Post Options   Quote Josef_Underwater Quote  Post ReplyReply Direct Link To This Post Posted: 23 December 2023 at 15:39
THX!! Also for the warm welcome!

Yes, I know this one: it has been of great use already for finding the right wires to capture serial clk/data and F1 signals.
Will try to upload logic analyzer screenshots and HEX data
Back to Top
Micholand View Drop Down
Admin Group
Admin Group
Knowledgebase Contributor

Joined: 30 October 2005
Country: Germany
Location: MUC
Status: Offline
Posts: 19165 		Post Options Post Options   Quote Micholand Quote  Post ReplyReply Direct Link To This Post Posted: 23 December 2023 at 15:45
Presumably the flash timing diagrams on the Multi-Interface-Shoe are similar to the old info given on mhohner's site or do they differ on the newer a7IV (see links below)?! For which flash modes did you capture timings?
/Michael

DWEs don't grow on trees! | Posting images&links FAQ
Back to Top
Josef_Underwater View Drop Down
Newbie
Newbie

Joined: 23 December 2023
Status: Offline
Posts: 3 		Post Options Post Options   Quote Josef_Underwater Quote  Post ReplyReply Direct Link To This Post Posted: 24 December 2023 at 11:56
THX Michael!

Ah, I created a misunderstanding: by "timing" I didnŽt mean the real/final flash light timing but the timing on the digital interface (serial clock and data).

Check out screenshot on https://magentacloud.de/s/4iNDY7tR7zfKmBG to see, what I mean.
There is also a sample of 14 byte /8 bit data in stand-by mode, which comes every 46.5ms, alternating with a 24 byte / bit data set

This protocol seems to be different to what Sebi discovered quite a while ago in his phantastic work, shown here: https://www.dyxum.com/dforum/topic8297.html

Best! Josef
Back to Top
Dyxum main page >  Forum Home > Equipment forums > Lighting

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.078 seconds.

Monitor calibration strip

Dyxum.com - Home of the alpha system photographer

In memory of Cameron Hill - brettania

Feel free to contact us if needed.