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E-mount electronic protocol reverse engineering

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bostwickenator View Drop Down
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Post Options Post Options   Quote bostwickenator Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2018 at 14:42
Hey rokaka I actually run LEX Optical where I'm building an E mount camera from scratch. Possibly we can leverage the coverage we got in Make: and around the web to bring in more contributors for this project. Honestly I think given another week or two I'll be at the point where I can build an AF lens. Personally I want to get to that line before I try and get publicity and open source the code.
 



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Entropy512 View Drop Down
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Post Options Post Options   Quote Entropy512 Quote  Post ReplyReply Direct Link To This Post Posted: 07 November 2018 at 23:04
Originally posted by bostwickenator bostwickenator wrote:

GREAT NEWS I can simulate a lens well enough to start the main messaging loop! I'll share the code soonish.

BTW, are you using the Arduino environment with the Teensy or straight GCC?
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rokaka View Drop Down
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Post Options Post Options   Quote rokaka Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2018 at 09:41
Originally posted by bostwickenator bostwickenator wrote:

Hey rokaka I actually run LEX Optical where I'm building an E mount camera from scratch. Possibly we can leverage the coverage we got in Make: and around the web to bring in more contributors for this project. Honestly I think given another week or two I'll be at the point where I can build an AF lens. Personally I want to get to that line before I try and get publicity and open source the code.


WOW. Super cool!!!!! Kudos to your work man, awesome!
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bostwickenator View Drop Down
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Post Options Post Options   Quote bostwickenator Quote  Post ReplyReply Direct Link To This Post Posted: 08 December 2018 at 16:36
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Entropy512 View Drop Down
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Post Options Post Options   Quote Entropy512 Quote  Post ReplyReply Direct Link To This Post Posted: 08 December 2018 at 17:06
Nice!

Sorry I haven't done much as far as data collection or further analysis lately... November was hectic and I've been dealing with sinusitis since Thanksgiving.

Hopefully I'll have more time to come back to this after the new year.
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Post Options Post Options   Quote rokaka Quote  Post ReplyReply Direct Link To This Post Posted: 05 January 2019 at 16:28
Happy New Year everyone! Any developments recently?
 



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Zachariah View Drop Down
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Post Options Post Options   Quote Zachariah Quote  Post ReplyReply Direct Link To This Post Posted: 08 March 2019 at 16:55
Hello,

I'm a sony a7ii owner and I'm currently thinking about building a AF ring near the LM-EA7 from techart but with a better motorisation. I though suck at programming. I found the firmware adresses for the LM-EA7 in the android apk to upgrade it. This may help you guys on your research for e-mount reverse engineering and also talk about the mistakes that may have been done on this ring.
LM-EA7,Firmware for LM-EA7 Ver6.0.0 20180105,http://www.techart-logic.com/g-nex3/firmware/lm-ea7/m-nex180105.bin ,38603
LM-EA7,Firmware for LM-EA7 Ver5.0.0 20170214,http://www.techart-logic.com/g-nex3/firmware/lm-ea7/m-nex170511.bin ,42745
LM-EA7,Firmware for LM-EA7 Ver4.0.0 20160905,http://www.techart-logic.com/g-nex3/firmware/lm-ea7/m-nex160905.bin ,7942
LM-EA7,Firmware for LM-EA7 Ver3.0.0 20160626,http://www.techart-logic.com/g-nex3/firmware/lm-ea7/m-nex160626.bin ,36800
LM-EA7,Firmware for LM-EA7 Ver2.0.0 20160415,http://www.techart-logic.com/g-nex3/firmware/lm-ea7/m-nex160415.bin ,51154
LM-EA7,Firmware for LM-EA7 Ver1.0.0 20160320,http://www.techart-logic.com/g-nex3/firmware/lm-ea7/m-nex160320.bin,8519
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cocciasik View Drop Down
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Post Options Post Options   Quote cocciasik Quote  Post ReplyReply Direct Link To This Post Posted: 11 hours 26 minutes ago at 09:25
Wow, you guys rock!

I do have programming skills (today mainly Java but I used to work with embedded systems where I used C++ and ARM assembly in the past). I also have some electronics background and I played with Arduino a few times. However, no experience with reverse engineering of code. My dream is to patch the firmware of LA-EA4 in order to use OSPDAF like an A99II! There are too many excellent screw-driven lenses out there from Sony/Minolta that will shine on newer E-mount cameras...

I have a large collection of E-mount and A-mount lenses -- about 100. If you believe I can be of any support, just ping me! For instance, capturing the communication between camera body and lenses and creating a DB for you to analyze? Or whatever you can think of. I have limited spare time, but I can definitely allocate some of it to this project!
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