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Hi everyone! Canon A60, found interesting things

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Offline Leonardo Miguel Delgado

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Hi everyone! Canon A60, found interesting things
« on: 03 / July / 2008, 17:45:38 »
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Offline RaduP

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Re: Hi everyone! Canon A60, found interesting things
« Reply #1 on: 03 / July / 2008, 20:23:47 »
Sorry to be a little off toopic, but the thread you posted contains some really great information! I tried before to modify a camera for prime focus, and I couldn't solve the lens error. This link helps a lot.
I think that hack should work with other cameras as well, because it seems that a lot of compact P&S cameras use the same kind of lens.

Not sure if it helps, but did you consider to look on eBay (or some similar site in Argentina) for broken Canon cameras that support chdk?
I did buy 1 with lens errors a while ago for 20 usd, to use it as prime focus, but I did something wrong and it got burned :/

On topic: Can you post those hex numbers? Do you know what the endianness is? And maybe they are not integers, could they be some floats maybe?
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Offline oversky

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Re: Hi everyone! Canon A60, found interesting things
« Reply #2 on: 03 / July / 2008, 22:07:02 »
I have an A80 and I am interested in a DIGIC I CHDK. Can you provide more detail on how to dump the firmware?
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Offline Leonardo Miguel Delgado

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Re: Hi everyone! Canon A60, found interesting things
« Reply #3 on: 03 / July / 2008, 22:28:44 »
Quote from: oversky on 03 / July / 2008, 22:07:02
I have an A80 and I am interested in a DIGIC I CHDK. Can you provide more detail on how to dump the firmware?

You have a PM!!

Is it illegal on the forum to provide a link to download firmwares? Thanks :)
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Offline Leonardo Miguel Delgado

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Re: Hi everyone! Canon A60, found interesting things
« Reply #4 on: 03 / July / 2008, 23:05:16 »
RaduP, thanks a lot! The E18 error is quite common and in the new cameras it's reported as "Lens error". Tha A60 and newers have four detectors (four photodiodes with IR LEDs). Two detectos are on the drive that moves the lenses. They detect how many turns the drive makes (when zooming, the system reads the number of turns the drive makes. At XXX turns you have 3X zoom, at XXX turns you got 2X). If the lens mechanism is stuck, the motor won't spin and you got the E18.

There are two detectors more, one that detects if the lens system is closed or not. If the lens is stuck, again, E18. The last detector if on the focus system. It detects at start up if the focus lens is "on place" or not. If something is wrong on the focus lens, you got an E99 error.

What I did for prime focus: Remove the whole lenses. Remove the shutter and replace it with three resistors. Leave the lens motor drive (and the smal gears) intact. And finally played a bit with the "lens closed" sensor. I cutted the tracks of the IR LED and added a switch to the photodiode.

When the camera starts, the switch must be closed for one second, then open for another second and finally closed again. The camera should work OK ;)

I don't wanna get off topic, now I'll open the firmware file and tell you of the adress ;)

Regards
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Offline Leonardo Miguel Delgado

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Re: Hi everyone! Canon A60, found interesting things
« Reply #5 on: 04 / July / 2008, 01:47:41 »
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Offline RaduP

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Re: Hi everyone! Canon A60, found interesting things
« Reply #6 on: 04 / July / 2008, 02:19:19 »
Very interesting.. The spacing between the values seems to be different, so probably they didn't use some array of a type/structure.

Can you try to maybe swap two of the numbers and the hex values before them? For example, swap the 20" with 30" (and the hex strings before it), and see if it works.

Also, the way the hex numbers are before the ascii strings suggest that they are a set of two 16b numbers, probably in a little endian format, possibly signed (and in this case negative numbers).

So, another idea would be to modify the numbers properly, for example replace 63ff67ff, with 50ff54ff, and see if the 25" exposure changes (use a stop watch or something).
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Offline Microfunguy

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Re: Hi everyone! Canon A60, found interesting things
« Reply #7 on: 04 / July / 2008, 06:09:45 »
Quote from: Leonardo Miguel Delgado on 03 / July / 2008, 22:28:44
Quote from: oversky on 03 / July / 2008, 22:07:02
I have an A80 and I am interested in a DIGIC I CHDK. Can you provide more detail on how to dump the firmware?
You have a P


This is very interesting, could you send me the details as well ?

Is it possible to upload the movie to ZShare or Rapidshare, I could not download it from here :-

http://64.233.179.104/translate_c?hl=es&sl=es&tl=en&u=http://www.sendspace.com/file/7rnpus&usg=ALkJrhjFP66FIO9JuitpBZmu7buljGBq7w


Did you manage to obtain the datasheets for any of the chips in the camera ?

You say that you took a photo of the moon.
The moon is very bright, it is always a sunny day !
But, your camera does not have a shutter that can close AFTER the photo is taken.
Do you get an interlacing effect and strange colours if you try to use the camera normally (by holding a lens against the 1.25" adapter) in daylight ?


David
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Offline Leonardo Miguel Delgado

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Re: Hi everyone! Canon A60, found interesting things
« Reply #8 on: 04 / July / 2008, 11:40:50 »
Nop, I didn't dumped it, just found the A80 firmware on the net!! Here it is: http://wins10sh.narod.ru/ps_a80.fir (if this is illegal on the forum please delete this message ;))

Indeed, it's impossible to get an image of the Moon as the brightness "burns" the whole image. However, at high magnifications it works pretty OK, sometimes you even have to increase the ISO / exposure !!
« Last Edit: 04 / July / 2008, 12:03:14 by Leonardo Miguel Delgado »
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Offline Leonardo Miguel Delgado

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Re: Hi everyone! Canon A60, found interesting things
« Reply #9 on: 04 / July / 2008, 16:12:21 »
Hi!

Well, here's more info. Opened again the decrypted firmware on the Hex editor. There are three different parts where the exposure numbers appears.

The first part shows 30", 25", 20", 15",13", 10", 8", 6" and so on. Next to the numbers there is some code.

The second part shows only 15", 13", 10", 8", 6" (...) and a bit more of code than the above part.

The third part shows the same codes of the second part.

Here are these codes:

30": 33-30-22-00-00-00-00-00-20-33-30-22-00-00-00-00-2C-01-0A-00-63-FF-67-FF

25": 32-35-22-00-00-00-00-00-20-32-35-22-00-00-00-00-FA-00-0A-00-6B-FF-70-FF

20": 32-30-22-00-00-00-00-00-20-32-30-22-00-00-00-00-C8-00-0A-00-76-FF-7C-FF

15": 31-35-22-00-00-00-00-00-20-31-35-22-00-00-00-00-96-00-0A-00-83-FF-86-FF
       31-35-22-00-00-00-00-00-20-31-35-22-20-00-00-00-96-00-0A-00-83-FF-86-FF-18-18-00
       31-35-22-00-00-00-00-00-20-31-35-22-20-00-00-00-96-00-0A-00-83-FF-86-FF-18-18-00

13": 31-33-22-00-00-00-00-00-20-31-33-22-00-00-00-00-82-00-0A-00-8A-FF-90-FF
       31-33-22-00-00-00-00-00-20-31-33-22-20-00-00-00-82-00-0A-00-8A-FF-90-FF-1B-1B-00
       31-33-22-00-00-00-00-00-20-31-33-22-20-00-00-00-82-00-0A-00-8A-FF-90-FF-1B-1B-00

10": 31-30-22-00-00-00-00-00-20-31-30-22-00-00-00-00-64-00-0A-00-96-FF-9B-FF
       31-30-22-00-00-00-00-00-20-31-30-22-20-00-00-00-64-00-0A-00-96-FF-9B-FF-1E-1D-00
       31-30-22-00-00-00-00-00-20-31-30-22-20-00-00-00-64-00-0A-00-96-FF-9B-FF-1E-1D-00

8" : 38-22-00-00-00-00-00-00-20-38-22-00-00-00-00-00-50-00-0A-00-A0-FF-A6-FF
       38-22-00-00-00-00-00-00-20-38-22-20-00-00-00-00-50-00-0A-00-A0-FF-A6-FF-20-20-00
       38-22-00-00-00-00-00-00-20-38-22-20-00-00-00-00-50-00-0A-00-A0-FF-A6-FF-20-20-00

6" : 36-22-00-00-00-00-00-00-20-36-22-00-00-00-00-00-3C-00-0A-00-AD-FF-B1-FF
       36-22-00-00-00-00-00-00-20-36-22-20-00-00-00-00-3C-00-0A-00-AD-FF-B1-FF-24-23-00
       36-22-00-00-00-00-00-00-20-36-22-20-00-00-00-00-3C-00-0A-00-AD-FF-B1-FF-24-23-00


...These are the codes I found next to these exposure numbers. Here's a image that displays the the codes on the Hex editor:

Regards!!
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