ixus90/sd790 IS porting

gordian

Hello everyone. I'm using the 1.00d firmware and had no problem getting it loaded onto my SD790 IS. My goal is basically to learn more about HDR photography without splurging on a DSLR and CHDK has made that a reality! Thank you to everyone who's worked on getting it running on this hardware.

I've been using the bracketing script and have run into some issues. I am unsure if they are firmware or script related but I don't see any documentation of experimentation with CHDK, the script, and the SD790 IS.

As instructed I made the replacements for Digic III processors. In order for the script to work I found I need to enter continuous shot mode--I'm unsure if this is an intended aspect of the script--and once set, I'm similarly unsure of how the number of continuous shots affects the behavior of the script execution.

I've been able to produce a few HDR composites and they look great, I'm just interested in making things easier for myself and any other SD790 IS users who are looking to experiment similarly.

Finally, I'm new to digital photography (apart from any previous P&S experiences). If anyone has suggested reading or links as to how I can manage RAW files (dng4ps2 doesn't have a SD790 IS profile!) I'd appreciate it (although I just downloaded Picasa).

Thank you again for the hard work and ingenuity (and apologies for the lengthy post).

fe50

Hello & welcome, gordian !

gordian
I'm just interested in making things easier for myself and any other SD790 IS users who are looking to experiment similarly.

You can do the bracketing without a script, just setup things in the CHDK menu & use the continuous mode or better the custom timer...
--> Scriptless Tv bracketing

If anyone has suggested reading or links as to how I can manage RAW files (dng4ps2 doesn't have a SD790 IS profile!) I'd appreciate it (although I just downloaded Picasa).

You can enable the CHDK DNG support, most apps understand the DNG format..
--> Enable DNG support

*Edit:
See also CHDK wikia: Software (try Rawterapee / dcraw based apps)...

gordian

fe50
You can do the bracketing without a script, just setup things in the CHDK menu & use the continuous mode or better the custom timer...
--> Scriptless Tv bracketing

Excellent! Thank you so much--this is a huge help and has much more predictable behavior. Thank you again for all the hard work and know-how that went into this.

scruss

On video recordings with the SD790, is the 1x bitrate setting supposed to be close to Canon's default? For me, it isn't - it's extremely blocky. I can provide a sample if you wish.

Update: Oops, ignore me. The default setting is just a bunch more blocky than the standard Canon one. I must say, I do like the 1% video quality setting ...

Tophatter

ehmu
I spent quite some time to push forward the port for the Ixus 90 1.00d, because I own it myself 😎Now I also had a quick look at the other known firmware versions.

1.00c showed minimal differences and some minimal shifted address areas.
I tried to adapt the necessary code, but obviously can not test it.
If anybody can give some positive feedback this firmware version could be added to the CHDK trunk.

I have a 1.00c that I'll test your build with. What exactly do I need to test?

Edit: It's loaded and working. I'll fool around over the next couple of days, but is there anything specific that I should look for?

scottydont4444

ehmu

1.00c showed minimal differences and some minimal shifted address areas.
I tried to adapt the necessary code, but obviously can not test it.
If anybody can give some positive feedback this firmware version could be added to the CHDK trunk.

Kind regards

I was able to load the firmware to my camera (1.00c) and was able to navigate around the CHDK menu. However, every time I went to take a picture, the camera would freeze up and it the light would just keep blinking.

ehmu

1.00d
My recent changes:
- fixed a bug with dark frame subtraction (nrflag was incorrect)
- improved USB remote support
- cosmetic changes (I hope patch verification is not too confusing)

I think it's good to add it to the trunk.

ehmu

1.00c
The new binary contains my last improvements for 1.00d (dark frame, USB)

scottydont4444
However, every time I went to take a picture, the camera would freeze up and it the light would just keep blinking.

Hmm. Which color is blinking? How long? Is save RAW active? Any other CHDK overrides active (usually in red color in the top left corner)? Do you have to turn off and on or remove the battery?

Tophatter
I'll fool around over the next couple of days, but is there anything specific that I should look for?

e.g. take a picture 😉

The changes compared to 1.00d are in:
boot, jogdial (in CHDK and Canon mode), movie overrides (bitrate, quality, change during record), ND filter override, ultra long exposure (>64s), ..
So it's good to test this.

Thanks for your feedback 😀

scottydont4444

ehmu

scottydont4444
However, every time I went to take a picture, the camera would freeze up and it the light would just keep blinking.

Hmm. Which color is blinking? How long? Is save RAW active? Any other CHDK overrides active (usually in red color in the top left corner)? Do you have to turn off and on or remove the battery?

It turns out that the override shutter speed got turned on. So it was taking a picture, it was just taking a very long time. I did notice that there is also a 1.00c patch. How do I install that?

fe50

Updated the CHDK trunk with ehmu's latest code: --> changeset #870
- added 1.00c (reply #273)
- corrections for 1.00d (reply #286)
- added 1.00e to the makefile (copy of 1.00d)

The latest binaries are available from the autobuild server, as always...

The autobuild server now serves 3 ixus90_sd790 versions:

1.00c
1.00d
1.00e (where 1.00e is simply a copy of the 1.00d version, it will also report 1.00d in the splash screen / CHDK fw info box)

@ehmu:
Are there any additions/corrections for the 1.00c version ?

ehmu

@fe50
Thanks a lot for merging all the patches so far.

For 1.00c I recommend the added patch:
+ correction of dark frame subtraction override
+ improved USB remote support

fe50

ehmu
For 1.00c I recommend the added patch:
+ correction of dark frame subtraction override
+ improved USB remote support

Done. (changeset #872)

Tophatter

I need to update to the latest firmware, but one odd thing I noticed is that if I tried to bracket exposures while shooting RAW, the camera would freeze and then shut off after the first picture.

scottydont4444

Tophatter

I need to update to the latest firmware, but one odd thing I noticed is that if I tried to bracket exposures while shooting RAW, the camera would freeze and then shut off after the first picture.

I noticed this as well. My camera usually made it to the second picture but then froze up and shut off.

ehmu

.. if I tried to bracket exposures while shooting RAW, the camera would freeze and then shut off after the first picture.

I can confirm crashes with raw (and dng) bracketing, but can not reproduce
it reliably. Bracketing with jpeg only works.
Most crashes I got after 3 pictures with 1/3Ev + bracket type, 1/5s Start Tv. It seems
as my slower SD card does not crash (at least less often).

I also get no crashes when I activate the continuous mode via the custom timer (icon with C) and then just have to press once to release the specified number of raw shots. When I use the continuous mode with the stacked rectangles icon, I have to keep the shoot button pressed - till it crashes.

NormanA

I put the latest build (874), which is no longer beta (Yay!) onto my card and the camera would no longer boot. Cardtricks went crazy and I tried several things and nothing worked, until I replaced the current DISKBOOT.BIN with the one from February 6th. It will boot from every other DISKBOOT.BIN file I tried it with, just not the one from build 874. Does this present a problem that needs to be addressed, or does this file truly only allows the camera to boot from the card. Every file is a different size, which makes me ask the question.

whim

Cardtricks went crazy

Can you explain what you did, and in what way CT went crazy ?
If you found a bug in CT, I'll gladly fix it; if not i should be able to explain what went wrong (i hope)

thanks,

wim

NormanA

I opened up CardTricks and it ask me to browse to the card, which I did, but it kept asking me to do the same thing, ad infinite-um. The only way I could get out of this loop, was to stop it through the Task Manager. I tried it twice, thinking the first time was just a glitch, but, it wasn't. Hope you're successful in getting this fixed, it worked before for me about a year ago.

whim

@NormanA

You're the second person to report this behaviour (from ~ 100.000 downloaders)
When the first person reported this, I was mystified, but after some exchange of
posts we determined the reason. So, here's my guess:

You moved the program - and forgot the CardTricks folder with helper files, which
should be in the same folder as CardTricks144.exe (as in attached pic)

Solution 1: find the folder & reunite with the program
Solution 2: redownload http://savedonthe.net/download/78/CardTricks-144-SFX.exe

HTH,

wim

NormanA

Wim,

I checked my CardTricks folder, and found that I had indeed used the wrong file to open the program. Thanks for the information, however, I now, also realize that the problem is with DISKBOOT.BIN, it's not working, unless I use one of the other files from a previous build. They all work fine, but, not the one from the current build. Am I losing functionality by using this older file with the newer build? The size of the new file is 263,668, dated Feb. 13, 2010. The latest one that works has a size of 252,729 and is dated Feb. 6, 2010.

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