Eos 400d ( Rebel XTI )

Sergei

ofir_tool.py (firmware decrypter program) https://chdk.setepontos.com/d/3290/465
IDB file https://chdk.setepontos.com/d/3290/385

eduperez

Many thanks to Sergei and somebody-else-who-asked-to-remain-anonymous for the info!

JoeNeptune

Ok i got python installed
do i just put ofir_tool.py in the tool directory?
how do i tell it to open the .idb file?

JoeNeptune

Could IR Prox release be made to work while mirror lock is on?
My photos of venus just dont look right with a tail.
Please dont ask whats wrong with a little tail. lol

a1ex

That's a nice idea; I'm thinking to enable MLU by default when self-timer is selected (and disable it when you disable self-timer), and also enable MLU in IR proxy (LCD Remote Shot in ML) in "Away" mode (when you put your hand near the sensor and the picture is taken when you move your hand away). What do you think about this?

JoeNeptune

Excellent!

idcastandblast

You guys are doing so many amazing things. I am anxious to try installing this hack. My problem is that I don't know whether to use the old instructions and files, or wait until there is a more stable updated verions with new install instructions. Keep up the good work. And Thank you.

eduperez

idcastandblast
You guys are doing so many amazing things. I am anxious to try installing this hack. My problem is that I don't know whether to use the old instructions and files, or wait until there is a more stable updated verions with new install instructions. Keep up the good work. And Thank you.

While there is still lots of room ahead for the hack and the documentation, I do not think the installation process will change very much, at least not in the immediate future.

eduperez

open card door ... take card out of camera ... plug card into reader ... copy file to card ... unplug card from reader ... plug card into camera ... close card door ... test ... and repeat

My hardware (camera, card, reader, ...) is not going to accept that abuse much longer; either I find an alternate solution or something is going to break, real soon. If anybody knows how to write to the card thou the USB cable (i.e., while it is still inside the camera), please stand up and speak. It does not have to overwrite the AUTOEXEC.BIN file itself, I just need to be able to write something, from the computer to anywhere inside the card; I will take care of the rest.

Thanks.

a1ex

Some custom PTP handlers may do the job, but they seem a mistery to me...

P.S. my card just broke yesterday due to this... but the camera is still alive 😀

eduperez

a1ex
Some custom PTP handlers may do the job, but they seem a mistery to me...

Thanks for the tip!

I see that gphoto2 can (allegedly) upload files to the card, and there even exists a project to make a filesystem on top of that (gphotofs); quite promising, until I read that "But now, to the help bit: in their infinite wisdom, Canon have only partially implemented the Picture Transfer Protocol on my camera (and probably all of their cameras). This means that you can't upload any files to it, which limits my ability to implement write support into gphotofs."... will try it, nevertheless.

a1ex
P.S. my card just broke yesterday due to this... but the camera is still alive 😀

Well, the card is (¿was?) the least of my worries, as I have an old card I use just for this; then comes the reader, they are quite cheap, and I need a new one to read SDHC cards anyway... but the camera, oh the camera!

JoeNeptune

A1ex, I am sorry to hear about your card.
Many compact flash cards come with a life time warranty. I hope yours is one.
I have read about one guy who didn't even know the camera had an eject button for the card but he would pull it out anyway.
I have been changing cards in the dark but I think i will be more careful now.
If there is no warranty and its not in bad shape maybe you could make a compact flash extender cable with it.
Eduperez perhaps you could do something like that also by soldering a CF card to a ribbon cable then to the female CF connection on your old card reader.

I did a quick search and there are places to buy compact flash extender cables.
I didnt see the price but they should be cheap because there isn't much to them, so maybe it would be best just to order one from someone who likes to solder wires.

a1ex

gphoto2 can't write files on the 550d either. But I was able to compile ptpcam with Mweerden's extensions under Windows, and call some functions from Python.

http://magiclantern.wikia.com/wiki/Remote_control_with_PTP_and_Python
http://www.mweerden.net/chdk_ptp.html
https://chdk.setepontos.com/d/4338

Now the big problem is to understand how to use all this stuff... if anyone can figure out, I'm interested too 😀

Also, the 5D2 Magic Lantern has some PTP extensions, but I don't know how to use them yet. There are even some debug messages in the 550D ML related to PTP, so the hard work should have been done 😀

eduperez

JoeNeptune[...]
Eduperez perhaps you could do something like that also by soldering a CF card to a ribbon cable then to the female CF connection on your old card reader.

I did a quick search and there are places to buy compact flash extender cables.
I didnt see the price but they should be cheap because there isn't much to them, so maybe it would be best just to order one from someone who likes to solder wires.

Sorry for the misunderstanding: my reader is (still) not broken, but I am precisely trying to avoid breaking it (or the camera!).

a1ex
gphoto2 can't write files on the 550d either. But I was able to compile ptpcam with Mweerden's extensions under Windows, and call some functions from Python.

http://magiclantern.wikia.com/wiki/Remote_control_with_PTP_and_Python
http://www.mweerden.net/chdk_ptp.html
https://chdk.setepontos.com/d/4338

Now the big problem is to understand how to use all this stuff... if anyone can figure out, I'm interested too 😀

Also, the 5D2 Magic Lantern has some PTP extensions, but I don't know how to use them yet. There are even some debug messages in the 550D ML related to PTP, so the hard work should have been done 😀

If the camera's PTP does no support uploading of files (all I need is that), then I am lost: I have been browsing those links (thanks!), but adding support to the 400D myself looks like science fiction to me (or just plain fiction, to be more precise).

a1ex

Well, we just have to figure out how to send some data from a PC program (ptpcam?) to a function from the camera. Then you'll open a file from there and save that data to the card. Sounds simple, but needs a bit of http://esolangs.org/wiki/Brainfuck

eduperez

a1ex
Well, we just have to figure out how to send some data from a PC program (ptpcam?) to a function from the camera. Then you'll open a file from there and save that data to the card. Sounds simple, but needs a bit of http://esolangs.org/wiki/Brainfuck

The code from CHDK_PTP to write a file seems pretty straightforward... but I have no idea how to hook it to the firmware. I have been looking at the functions.txt file, but I am still clueless.

0xAF

a1ex
Well, we just have to figure out how to send some data from a PC program (ptpcam?) to a function from the camera. Then you'll open a file from there and save that data to the card. Sounds simple, but needs a bit of http://esolangs.org/wiki/Brainfuck

i'm not sure how PTP (protocol) works, but it could it be possible that you can add new commands or use existing (in the protocol) and unimplemented (in the camera) to handle that transfer... i guess that requires good knowledge of the code or in reverse engineering though, to make a new handler...

0xAF

eduperez
The code from CHDK_PTP to write a file seems pretty straightforward... but I have no idea how to hook it to the firmware. I have been looking at the functions.txt file, but I am still clueless.

chdk implementation looks really clear 😉

eduperez

0xAF

eduperez
The code from CHDK_PTP to write a file seems pretty straightforward... but I have no idea how to hook it to the firmware. I have been looking at the functions.txt file, but I am still clueless.

chdk implementation looks really clear 😉

Yes, as long as you know where "add_ptp_handler" and the other functions are (if they are somewhere); or did I miss something?

waterwingz

eduperez
.. as long as you know where "add_ptp_handler" and the other functions are (if they are somewhere); or did I miss something?

For the IXUS120-SD940 it was pretty painless - stubs_entry.S picked up the correct address. The only other thing needed was to make sure kbd.c was correct with :

#define USB_REG 2
#define USB_MASK (0x00080000);

After that, its just worked as part of the standard build.

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