Any developers interested in working on CHDK firmware for DSLRs ?

owerlord

115

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #160 on: 15 / May / 2008, 18:36:01 »

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400D 1.1.1
I identyfied loading functions in the loader. they are:
00802634 erase_write_bootloader
00802AD4 erase_write_bindresource
00802D44 write_roms
00802868 erase_write_mainfirmware

The interesting part is:
1. there are wierd addresses in these functions (0xF8010000 not 0xFF810000 for the mainfirmware)
2. what is the bootloader !?!?

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owerlord

115

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #161 on: 16 / May / 2008, 15:14:21 »

Interesting:

I found out that there is no bootloader in the .fir from canon. It should have a "5" flag in the data pack list. Can you check in the other EOS fir's if there is such?

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speculardecay

2

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #162 on: 22 / May / 2008, 13:46:29 »

Hello everyone,
I've been lurking for a week on this forum and find all this CHDK subject matter very interesting. I currently own a 400d and would very like to hack into it and script some kind of intervalometer to create timelapses. In fact it's probably the only option I really miss on my camera. If someone manages to prep a card that can accept custom scripts that would be fantastic (wish I could do that part myself!)
Looking forward to seeing how it evolves!

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mx3

372

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #163 on: 18 / June / 2008, 08:17:15 »

Quote from: speculardecay on 22 / May / 2008, 13:46:29

Hello everyone,
I've been lurking for a week on this forum and find all this CHDK subject matter very interesting. I currently own a 400d and would very like to hack into it and script some kind of intervalometer to create timelapses. In fact it's probably the only option I really miss on my camera.

I made 12 timelapse movies so far.
I do not remember exactly how much shoots it is but lets assume each session was 2000 shoots long (i usually do 1 shoot per 5-10 seconds)
so it seems my camera did ~20000 shoots

my camera is Powershot a630 (with electronic shutter)

are you sure you want to do something like that with mechanical shutter?

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skype: max_dtc. ICQ: 125985663, email: win.drivers(at)gmail, eVB decompiler

speculardecay

2

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #164 on: 18 / June / 2008, 09:38:13 »

Quote from: mx3 on 18 / June / 2008, 08:17:15

are you sure you want to do something like that with mechanical shutter?

Sure, my camera is made to be used!
I already can make timelapses using this : http://patenteux.com/timelapse/Timers.html#TimelapseTron_SSE but I would like to be able to make them usnig no outside controler.

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ASalina

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #165 on: 18 / June / 2008, 10:05:53 »

Quote from: mx3 on 18 / June / 2008, 08:17:15

I made 12 timelapse movies so far.
I do not remember exactly how much shoots it is but lets assume each session was 2000 shoots long (i usually do 1 shoot per 5-10 seconds)
so it seems my camera did ~20000 shoots

my camera is Powershot a630 (with electronic shutter)

are you sure you want to do something like that with mechanical shutter?

This is a concern of mine as well. I wonder if the shutter can be held open (like in "Bulb" position) for the whole shoot and just sample the CCD at intervals. There could be a problem with the CDD overheating, so perhaps the CCD's power could be turned on and off before and after each sample. (This overheating would have to be dealt with for motion detection as well).

I'm just not sure of how the different cameras work internally
(mechanical or electro-mechanical shutters).

We could at least lock the mirror up during the entire shoot.

I know a guy over on dpreview.com who is very knowledgeable about DSLRs and who is excited about CHDK. I'm sure we could consult with him if we need help figuring this out.

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_MAG_

47

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #166 on: 18 / June / 2008, 14:03:41 »

I sink timelapse and mowies posible in 450d and other cameras with life view. But 400d dont have him.
Of couse if we understand all internal comands we can do what you wish. But i sink it is wery hard.
in ideal all simple :
1. meter exposure. Lock AV and TV value
2. mirror lookup
3. shuter release
outher is too hard. need:
4* turn on and turn off matrix fast. Becouse this period been like shuter speed (AV). I dont know what happined with matrix and how quick they can on and off. This is risky.
5* when matrix turned off write signal to CF. Clean matrix.

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DataGhost

314
EOS 40D, S5IS

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #167 on: 18 / June / 2008, 14:18:01 »

Quote from: speculardecay on 18 / June / 2008, 09:38:13

Quote from: mx3 on 18 / June / 2008, 08:17:15
are you sure you want to do something like that with mechanical shutter?

Sure, my camera is made to be used!

Are you really sure? At 10-second intervals, you'll have 100000 shots in 277 hours or just over 11 days... and the 400D doesn't even have a *guaranteed* 100000-shot lifetime. I really suggest getting a good compact camera for that (electronic/'half'mechanical shutter, not focalplane-based) but of course, it's your money

Quote from: ASalina on 18 / June / 2008, 10:05:53

This is a concern of mine as well. I wonder if the shutter can be held open (like in "Bulb" position) for the whole shoot and just sample the CCD at intervals. There could be a problem with the CDD overheating, so perhaps the CCD's power could be turned on and off before and after each sample. (This overheating would have to be dealt with for motion detection as well).

I'm just not sure of how the different cameras work internally
(mechanical or electro-mechanical shutters).

We could at least lock the mirror up during the entire shoot.

I know a guy over on dpreview.com who is very knowledgeable about DSLRs and who is excited about CHDK. I'm sure we could consult with him if we need help figuring this out.

CMOS

not CCD.
Anyway, this *might* be possible but only with longer exposures. I.e. the 40D (live view plus 'silent' shooting) can already shoot pictures with only the second shutter curtain, the first is electronic. However, the shutter is still required, at least on short exposures. As far as I know, the chip can't just be 'deactivated' so you'll have to read it while it's still gathering light, causing an uneven exposure across your image. That's why there's still a mechanical shutter, else there wouldn't be any need for one.
Still then, I don't know how the data from the CMOS is transferred to the camera memory (does the OS read it from the CMOS and put it in the RAW buffer, or does the CMOS push it into the RAW buffer with DMA?) so it might be hard to do it in bulb mode. It would be easier to somehow disable the shutter and just take several pictures.

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holeepassion

39

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #168 on: 27 / August / 2008, 03:40:36 »

hello ? where are we at please ?

Nikon just releases D90 with movie function ... you guys surely can

Quote from: DataGhost on 18 / June / 2008, 14:18:01

Quote from: speculardecay on 18 / June / 2008, 09:38:13
Quote from: mx3 on 18 / June / 2008, 08:17:15
are you sure you want to do something like that with mechanical shutter?

Sure, my camera is made to be used!
Are you really sure? At 10-second intervals, you'll have 100000 shots in 277 hours or just over 11 days... and the 400D doesn't even have a *guaranteed* 100000-shot lifetime. I really suggest getting a good compact camera for that (electronic/'half'mechanical shutter, not focalplane-based) but of course, it's your money

Quote from: ASalina on 18 / June / 2008, 10:05:53
This is a concern of mine as well. I wonder if the shutter can be held open (like in "Bulb" position) for the whole shoot and just sample the CCD at intervals. There could be a problem with the CDD overheating, so perhaps the CCD's power could be turned on and off before and after each sample. (This overheating would have to be dealt with for motion detection as well).

I'm just not sure of how the different cameras work internally
(mechanical or electro-mechanical shutters).

We could at least lock the mirror up during the entire shoot.

I know a guy over on dpreview.com who is very knowledgeable about DSLRs and who is excited about CHDK. I'm sure we could consult with him if we need help figuring this out.

CMOS not CCD.
Anyway, this *might* be possible but only with longer exposures. I.e. the 40D (live view plus 'silent' shooting) can already shoot pictures with only the second shutter curtain, the first is electronic. However, the shutter is still required, at least on short exposures. As far as I know, the chip can't just be 'deactivated' so you'll have to read it while it's still gathering light, causing an uneven exposure across your image. That's why there's still a mechanical shutter, else there wouldn't be any need for one.
Still then, I don't know how the data from the CMOS is transferred to the camera memory (does the OS read it from the CMOS and put it in the RAW buffer, or does the CMOS push it into the RAW buffer with DMA?) so it might be hard to do it in bulb mode. It would be easier to somehow disable the shutter and just take several pictures.

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Athiril

7

Re: Any developers interested in working on CHDK firmware for DSLRs ?

« Reply #169 on: 08 / September / 2008, 09:16:19 »

Just want to see where CHDK support is with the 30D, id like a text reader and games and things...

and an interval timer (no# of shots, exposure length (or set that on cam normally), and interval between each shot)

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