CHDK for new Canon PowerShot SX200 IS?

fe50

3139
IXUS50 & 860, SX10 Star WARs-Star RAWs

Re: CHDK for new Canon PowerShot SX200 IS?

« Reply #110 on: 19 / July / 2009, 07:35:30 »

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Quote from: OldGit on 19 / July / 2009, 03:48:47

Now I need to trim the dump as suggested by fe50 and find a disassembler (don't have IDA)

I've uploaded the already cleaned/trimmed dump (= ready to use in IDA) to the CHDK dumps repository: forum post.

Without IDA (only usable on Windows; you need the "Pro" version since the free one don't have ARM support) you can try to work with the GPL tools, but it's not as comfortable as with IDA...

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-->FIRMWARE DUMPS<-- * Manual * Lua * me

OldGit

303

Re: CHDK for new Canon PowerShot SX200 IS?

« Reply #111 on: 19 / July / 2009, 07:53:38 »

Quote

I've uploaded the already cleaned/trimmed dump.......

Thanks fe50, was just about to try and find the right place to put it.

Think this may be as far as I go without IDA, but if we get to the testing stage ........

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SX200 IS-100C

whoever

280
IXUS950

Re: CHDK for new Canon PowerShot SX200 IS?

« Reply #112 on: 19 / July / 2009, 12:23:18 »

Quote from: OldGit on 19 / July / 2009, 03:48:47

I used a phototransistor into a comparator then into a max202cpe (ttl to rs232 interface chip) then used a scope to get the timing right.

That's fine, but it's of little help to an uninitiated amateur -- one needs at least a circuit diagram and an explanation of the workflow. See, I also blinked the stuff out of my cam through RS232 way back, and I vividly remember the frustration caused by the arcane/misleading/incorrect information, found on the net. Now that blinking comes again into fashion, newcomers need clear instructions. Unfortunately, I trashed my setup long ago and cannot reproduce it -- but you still can.

Quote

don't have IDA

You're a big boy...

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mmgRay

9

Re: CHDK for new Canon PowerShot SX200 IS?

« Reply #113 on: 19 / July / 2009, 13:17:24 »

Good news on the dump indeed, how soon can we expect a test version?

Edit: I couldn't find any strings that relate to flash popup hmm.. Also, is there any idc file for IDA, there seems to be none for the new dryOS firmware..

« Last Edit: 19 / July / 2009, 13:42:40 by mmgRay »

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reyalp

13878

Re: CHDK for new Canon PowerShot SX200 IS?

« Reply #114 on: 19 / July / 2009, 18:45:52 »

Quote from: mmgRay on 19 / July / 2009, 13:17:24

Good news on the dump indeed, how soon can we expect a test version?

As soon as you build one

No developer without the camera is going to tackle this.

Quote

Edit: I couldn't find any strings that relate to flash popup hmm.. Also, is there any idc file for IDA, there seems to be none for the new dryOS firmware..

Use the a720 one.

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mmgRay

9

Re: CHDK for new Canon PowerShot SX200 IS?

« Reply #115 on: 19 / July / 2009, 19:47:12 »

Yah well, i'm not an expert on ASM..

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OldGit

303

Re: CHDK for new Canon PowerShot SX200 IS?

« Reply #116 on: 20 / July / 2009, 00:50:49 »

Quote from: whoever on 19 / July / 2009, 12:23:18

That's fine, but it's of little help to an uninitiated amateur -- one needs at least a circuit diagram.......

If it will be of use, no problem.
I have a circuit diagram and board layout, I can also write some notes and add code snippets,
but I would not suggest that an uninitiated amateur try this except as a last resort.

I'll put it all together over the next few days and try to find somewhere to post it.

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SX200 IS-100C