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E-mount electronic protocol reverse engineering

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sympa View Drop Down
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Joined: 09 August 2015
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Posts: 16 		Post Options Post Options   Quote sympa Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2016 at 19:53
I mean the EF mount. What I mean is that if the camera does not offer you a specific feature, it is the adapter that is the problem, and thus the interface from adapter to camera.

Why: the adapter generates its list of features and tells it to the camera. It does not need to talk to the lens for that.

So the behaviour also points to most adapters being not fully capable in communicating to the camera.

It is something else if a feature is advertised but for example focusing fails. In that case the problem can also be on the Canon side of things.
 



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Entropy512 View Drop Down
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Posts: 57 		Post Options Post Options   Quote Entropy512 Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2016 at 01:23
I could have sworn when looking at one of the A-mount ROM decoding threads, someone was attaching files - but I don't see a way to attach a file in the "post reply" area... Am I missing something?

(I've got ZIPs with decoded dumps of SAL55300+LA-EA3+A6300 init and focus, same for EF50/1.8 STM+Metabones IV + A6300, along with SEL55210+A6300)
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overeema View Drop Down
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Posts: 379 		Post Options Post Options   Quote overeema Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2016 at 07:22
You can put the zip file (s) somewhere in the cloud, e.g. Dropbox, and put the link (s) to the files in a post in this thread. I am not aware that Dyxum would support file attachments in forum postings
minolta owner since 1969;A350-CZ1680-G70300-Tamron60F2-Minolta100F2-35105-28135-50F1.7; NEX6-E1650-E18105G (& 5 x minolta MC/MD)
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Miranda F View Drop Down
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Posts: 4074 		Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2016 at 14:11
Originally posted by Entropy512 Entropy512 wrote:

I could have sworn when looking at one of the A-mount ROM decoding threads, someone was attaching files - but I don't see a way to attach a file in the "post reply" area... Am I missing something?

(I've got ZIPs with decoded dumps of SAL55300+LA-EA3+A6300 init and focus, same for EF50/1.8 STM+Metabones IV + A6300, along with SEL55210+A6300)


Can you store them somewhere online and publish a link? I'd certainly be interested to see the files.
Miranda F & Sensorex, Sony A7Rii, A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras ...
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Entropy512 View Drop Down
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Posts: 57 		Post Options Post Options   Quote Entropy512 Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2016 at 23:17
Yeah, I'll look into it. Spoiled by having above-average status on XDA I guess (I can upload fairly large text files and attachments).

I'm always worried about broken links down the line, or filesharing companies getting bought out and starting to inject malware (yes I have had this happen! I used to religiously upload things to dev-host.com, but they were purchased and started injecting malware into some downloads!)
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Miranda F View Drop Down
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Posts: 4074 		Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2016 at 23:33
Yes, it's almost worth getting your own server, isn't it?
Miranda F & Sensorex, Sony A7Rii, A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras ...
 



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sybersitizen View Drop Down
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Posts: 14453 		Post Options Post Options   Quote sybersitizen Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2016 at 02:27
Originally posted by Miranda F Miranda F wrote:

Yes, it's almost worth getting your own server, isn't it?

With prices dipping below four dollars a month for unlimited file space (supporting any file formats), email accounts, website construction tools, and various other goodies, I would omit the word almost for do-it-yourself types.
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Entropy512 View Drop Down
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Posts: 57 		Post Options Post Options   Quote Entropy512 Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2016 at 16:23
Originally posted by sybersitizen sybersitizen wrote:

Originally posted by Miranda F Miranda F wrote:

Yes, it's almost worth getting your own server, isn't it?

With prices dipping below four dollars a month for unlimited file space (supporting any file formats), email accounts, website construction tools, and various other goodies, I would omit the word almost for do-it-yourself types.

Yeah... I used to have a hosted machine with my own domain somewhere, but the hosting provider had a management change and rather than go through the hassle of migrating to another hosting provider, I just backed everything up and asked, "do I REALLY need this?" - at that point I didn't.

But it's the usual fear I have of broken links - I host a file somewhere, link to it from elsewhere, and then the host breaks and I've left a pile of broken links somewhere. But at least in the short term - I'll take the risk of some broken links, might put some stuff up later today. Also, not sure if people noticed (probably should've pointed it out) but I posted more detail on message framing and init sequences by editing those posts.
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Leegong View Drop Down
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Posts: 30 		Post Options Post Options   Quote Leegong Quote  Post ReplyReply Direct Link To This Post Posted: 30 September 2016 at 09:15
struc E_mount_FrameHeader
{    uint8 SyncHeader ; // constant 0xF0
     int16 SizeOfFrame ; // numbers of bytes of this frame
     uint8 FrameType ;   // enum {1,2,3}
     uint8 FrameSEQ ;   // valid for frame type01
}

Command/Response payload is followed immediately ,
the first byte of Command/Response structure is CMD/Response ID.

Hope this helpful for you .

Leegong

Edited by Leegong - 30 September 2016 at 09:25
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Leegong View Drop Down
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Posts: 30 		Post Options Post Options   Quote Leegong Quote  Post ReplyReply Direct Link To This Post Posted: 30 September 2016 at 09:22
Sorry , my fault , some typo in above post .
struc E_mount_FrameHeader
{    uint8 SyncHeader ; // constant 0xF0
     int16 SizeOfFrame ; // numbers of bytes of this frame
     uint8 FrameType ;   // enum {1,2,3}
     uint8 FrameSEQ ;   // valid for frame type 01
}；
Command/Response payload is followed after Frame header immediately ,

Edited by Leegong - 30 September 2016 at 09:41
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Entropy512 View Drop Down
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Posts: 57 		Post Options Post Options   Quote Entropy512 Quote  Post ReplyReply Direct Link To This Post Posted: 27 March 2017 at 23:03
Originally posted by Leegong Leegong wrote:

Sorry , my fault , some typo in above post .
struc E_mount_FrameHeader
{    uint8 SyncHeader ; // constant 0xF0
     int16 SizeOfFrame ; // numbers of bytes of this frame
     uint8 FrameType ;   // enum {1,2,3}
     uint8 FrameSEQ ;   // valid for frame type 01
}；
Command/Response payload is followed after Frame header immediately ,

Ooooh! Somehow I never caught on to SizeOfFrame - as nearly every packet type I was looking at had a unique length, AND in addition - Many frames have "garbage" data on the end. But after looking again - yeah that's a length field!

Now to figure out where the packet ID data is...
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rev0 View Drop Down
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Joined: 25 May 2017
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Posts: 2 		Post Options Post Options   Quote rev0 Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2017 at 03:10
How far away does it look to be able to make a DIY EF <-> NEX adapter? I recently bought a Fotga EF-NEX AF adapter, and found out to my disappointment that it doesn't work with my favorite lens, the Sigma 17-50mm f/2.8. Turns out not even the MC-11 works with that lens, it's an oddball one. It's really puzzling what would be different about this lens that causes it to not work whereas the Canon STM lenses I have work fine.
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Leegong View Drop Down
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Posts: 30 		Post Options Post Options   Quote Leegong Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2017 at 07:13
struc E_mount_Frame_tail
{    uint16 Checksum ;   
     uint8 SyncCoding ; // constant 0x55
}；
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Leegong View Drop Down
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Posts: 30 		Post Options Post Options   Quote Leegong Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2017 at 07:32
I'm analyzing firmware of sony LAEA ,which is helpful
for hacking E-mount protocol , any info of A-mount is welcome!
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