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SD890 works, but have usability issues

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Offline uOpt

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SD890 works, but have usability issues
« on: 26 / June / 2009, 14:58:08 »
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I have installed chdk on my Canon SD890 and it works fine for the most
part.

But there is one major problem: I don't know how to cleanly make the
camera take a picture with chdk active, but not from inside the chdk
menus (which would invoke the current chdk script).

The SD890 does not have the old style control for shoot or review
mode.  It has a main on/off button and a review button and the review
button works even when the camera is off (stupid but that's what it
is).  I can enter chdk just fine by pressing review directly, then
boot and enter the menus.  But from there there is no way to enter
normal shooting mode like there would be on a -say- sd450.  All I can
do is now trigger a chdk script with the shutter button.



If I go by turning the camera on first with the main on/off switch, it
goes into shooting mode and if I press the review button then I cannot
enter the firmware update section.

The only trick I found is this:
- turn camera on into shooting mode
- press review button (firmware menu not available)
- wait for the camera to time out of shooting mode
- (the lens will retract)
- (it is still in review mode)
- THEN I can enter the firmware menu to boot chdk
- and THEN I can get our of review mode and with the shutter button
  take pictures while chdk is active (e.g. to get raw pics)

There must be an easier way but I can't figure it out.

I could of course write a script that just takes on picture.

Thanks

%%

Also some side questions:

What's the most straightforward way to power the camera with a PSU?

Under Linux, is there a way to toggle USB power to trigger a remote
control shutter release?





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Offline reyalp

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Re: SD890 works, but have usability issues
« Reply #1 on: 26 / June / 2009, 18:56:04 »
Quote from: uOpt on 26 / June / 2009, 14:58:08
But there is one major problem: I don't know how to cleanly make the camera take a picture with chdk active, but not from inside the chdk menus (which would invoke the current chdk script).
CHDK is active even if you aren't in alt mode. You cannot take pictures in alt mode without a script. This is normal. ALT mode gives you access to CHDK controls, settings and scripts. Shooting relevant settings will still be in effect when you leave alt mode.
Quote
The SD890 does not have the old style control for shoot or review mode.  It has a main on/off button and a review button and the review button works even when the camera is off (stupid but that's what it is).  I can enter chdk just fine by pressing review directly, then boot and enter the menus.  But from there there is no way to enter normal shooting mode like there would be on a -say- sd450.  All I can do is now trigger a chdk script with the shutter button.
Half press the shutter before you enter alt mode.

If you set up automatic booting, you should be able to start in shooting mode by holding the shoot button down a little longer than normal. See http://chdk.wikia.com/wiki/Bootable_SD_card
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