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SD980 beta release

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Offline valor

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Re: SD980 beta release
« Reply #50 on: 04 / December / 2009, 03:42:46 »
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Quote from: RaduP
Yes, you dump it via a LED (unless if you want to open it and solder stuff on the board).
Ok, that makes sense. I'll dig more for the phototransistor schematics.

Quote from: RaduP
And no, I mean still photos, not videos. I don't think you can (yet) to change the frame rate like that. Besides, that would only work at night, or else you need the mechanical shutter to 'fire' after each frame.
On my Ixus 70, i had this forever. I'm not sure if it's part of the CHDK (i had CHDK on it, since the camera was delivered). In video mode, when you press the Timer/Drive button then there's an option to record a frame every 1 or 2 seconds. You basically leave the camera in video recording mode, and it takes timelapse video (yes video). I'll check tonight, if it's built-in feature or CHDK
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Offline fe50

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Re: SD980 beta release
« Reply #51 on: 05 / December / 2009, 06:08:09 »
Quote from: valor on 04 / December / 2009, 03:42:46
On my Ixus 70, i had this forever. I'm not sure if it's part of the CHDK (i had CHDK on it, since the camera was delivered). In video mode, when you press the Timer/Drive button then there's an option to record a frame every 1 or 2 seconds. You basically leave the camera in video recording mode, and it takes timelapse video (yes video). I'll check tonight, if it's built-in feature or CHDK

No, it's not a CHDK feature.
It's a feature Canon implemented in some of the Powershot cameras, e.g. also on the SD870; it looks like Canon removed this feature on the newer cameras, maybe 'cause the video format has changed (MJPEG on older cameras, Quicktime on newer ones)...
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Offline valor

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SD980 firmware dump via a Logic Analyzer?
« Reply #52 on: 07 / December / 2009, 04:55:21 »
Thanks, my old cam is an SD1000 (Ixus 70) and I really liked this feature. But luckily timelapse videos can still be shot in photo mode in a much higer quality with CHDK.

Still waiting for my SD980 to arrive this week.
Has any one tried the Saleae "Logic" logic analyzer (http://www.saleae.com/home/)? I'm thinking about trying it out to see if I can dump the firmware this way. It's not an ideal LA, but for the money it looks a good addition to my tools.
Apparently the software can aquire 1000M samples.
A 1.7MB firmware is around 1.8M Bytes (million bytes), with the led blinker method, it's 8 times of that which just a little over 14M bits.
I was told that for a good timing registration the instrument should preferably be 5x-8x more in its measuring speed, which makes it 70M samples (minimum). Apparently, with a simple level shifter a led output can be attached to the LA and the data can be exported as a binary file or a CSV.

At the moment, i am unsure about a few things:
The LA has a list of fixed frequencies with which the unit (or the software that came included) can aqcuire:24Mhz(i would not rely on this since it depends on PC and other USB deviches on the same channel), 16Mhz, 12Mhz, 8Mhz, 4Mhz, 2Mhz, 1Mhz, 0.5Mhz, 0.25Mhz and 0.2Mhz.
1. What frequency is the blinker working at?
2. Can the "blinker" be tweaked for a higher frequency?
3. I assume that at higher frequencies "blinking" will be affected negatively unless the LED is removed (since it will act like a capacitance and smoothen the signal edges on Raise (and perhaps on Falls), is it so?
« Last Edit: 07 / December / 2009, 05:02:23 by valor »
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Offline valor

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Re: SD980 beta release
« Reply #53 on: 08 / December / 2009, 06:09:23 »
Just a small update, mine came in a few minutes ago.
The firmware version is  1.01 rev 3.00 (1.01C).
Guess now it's time to try to get the firmware out.
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Offline fudgey

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Re: SD980 firmware dump via a Logic Analyzer?
« Reply #54 on: 08 / December / 2009, 15:32:33 »
Quote from: valor on 07 / December / 2009, 04:55:21
1. What frequency is the blinker working at?
2. Can the "blinker" be tweaked for a higher frequency?
3. I assume that at higher frequencies "blinking" will be affected negatively unless the LED is removed (since it will act like a capacitance and smoothen the signal edges on Raise (and perhaps on Falls), is it so?

I've never had to dig into all that blinking stuff, but http://chdk.wikia.com/wiki/Porting_the_CHDK has a bunch of info about it, including some timing stuff. The blinker code can of course blink much faster (previous blinkers try to match reliable serial port baudrates or audio input bandwidth and also cope with rather slow phototransistor receivers). Eventually you'll run into either maximum I/O speed for the ARM at that time or maximum speed for switching that particular LED circuit.
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Offline RaduP

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Re: SD980 beta release
« Reply #55 on: 08 / December / 2009, 18:11:44 »
If you want, I can give you my blinker, which should be compatible with your model too, unless if Canon did some major changes.
But you will need to get the ARM toolchain, so that you can compile the code.
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Offline valor

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Re: SD980 beta release
« Reply #56 on: 09 / December / 2009, 08:46:30 »
yes please.
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Offline RaduP

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Re: SD980 beta release
« Reply #57 on: 09 / December / 2009, 19:32:36 »
Sent
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Offline valor

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Re: SD980 beta release
« Reply #58 on: 09 / December / 2009, 20:41:31 »
Quote from: RaduP on 09 / December / 2009, 19:32:36
Sent

Thanks, got it. Managed to view the txt correctly. Got all the details. Gonna build the cable tomorrow.
My Logic Analyzer has not arrived yet, so ill go with the sound card solution first.
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Offline RaduP

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Re: SD980 beta release
« Reply #59 on: 10 / December / 2009, 02:35:58 »
Why not go to the COM solution?
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