SX200is Porting

[fe50]

The menu option 'Play>Firmware update' is still missing whatever I try. I can not do any manual CHDK boot.

You'll get this menu item only when there's the PS.FI2 file is stored in the card's root (make sure the filename is really ps.fi2, on Mac OS remove additions like quarantine flags: http://chdk.wikia.com/wiki/FAQ/Mac#Still_Having_Trouble.3F ) AND you start the camera in playback mode (lens retracted) with the [>] button.

[phKU]

[hameno]

i have a strange bug on my sx200is, updated to the newest version, 902, and now my flash randomly flashes, but only very short, like 1/10 of a second, now im concerned this may damage my flash, anyone else has this problem?

[fe50]

Hello & welcome, hameno !

i have a strange bug on my sx200is, updated to the newest version, 902, and now my flash randomly flashes, but only very short, like 1/10 of a second, now im concerned this may damage my flash, anyone else has this problem?

Known bug - see also this Bugtracker entry: http://chdk.kernreaktor.org/mantis/view.php?id=341

*Edit:
Until this issue is solved, use your older build.
You'll find older SX200 CHDK packages (rev. 867) here: http://drop.io/CHDK_867
(for SX200 - http://drop.io/CHDK_867/asset/sx200is-100c-0-9-9-867-beta-zip or http://drop.io/CHDK_867/asset/sx200is-100d-0-9-9-867-beta-zip)

[hameno]

thanks for the info

[ADamb]

It looks like problem comes from stubs_auto.S:
STUB(FF93D2C4)

It is in the middle of function FF93D2A0
How to correct this?

[reyalp]

It looks like problem comes from stubs_auto.S:
STUB(FF93D2C4)

Somewhere the code must do a B or BL to sub_FF93D2C4

It is in the middle of function FF93D2A0
How to correct this?

Jumping to the middle of a function is done intentionally in some cases, when you only need to change the beginning, however

Code: [Select]

                 "BL      sub_FF93D2C4\n"                // continue function in firmware
(capt_seq.c 458)
this should be a plain B, not a BL. Returning to there would be bad.

[reyalp]

I've changed the BL to a B

[fe50]

From reports in the german forum: the issue of randomly flashes is still present, also with #904.

[OldGit]

From reports in the german forum: the issue of randomly flashes is still present, also with #904.

Sorry for the delay in looking at this, other priorities have stopped me working on CHDK recently.

The problem seems to be that the "random" flashes are when the camera decides the settings will result in a dark photo, so it tries to compensate (but only on first shoot of a sequence).
I have removed the calls to sub_FF93D2A0_my and the function itself.
This will fix the problem but will re-introduce the AV Bracketing error.

I will try to look at Bracketing again, but I think it better that we stop the "random" flashes first.

Could all please test the attached.
OldGit

[sergale]

TESTED - ok! Thank's...

[fe50]

Added to the trunk, changeset #905, thx OldGit.

==>> Note for the SX200 users: Av bracketing is not working ATM, use Tv bracketing instead ! <<==

[skiingflea]

Hi team,

I just started using CHDK yesterday, so please forgive any schoolboy errors!

I have an issue when using the Tv Bracket method described here: http://chdk.wikia.com/wiki/CHDK_for_Dummies#Bracketing_and_HDR with Tv +/- 2 and 3 shots. If I turn the flash off, then the camera seems to crash just after it has taken the 2nd or 3rd shot. With the flash on, it's working fine!

Does anyone know the cause? I tried with different modes and different number of shots, different step values etc, and it still seems to crash. As I notice above, Av bracketing is not working, but I can't get Tv bracketing to work either.

I was using build sx200is-100d-0.9.9-911-full yesterday and sx200is-100d-0.9.9-912-full today.

Thanks!
Paul

[fe50]

Hello & welcome, Paul !

I suggest to try scriptless bracketing first: --> http://chdk.setepontos.com/index.php/topic,2143.msg19864.html#msg19864

[skiingflea]

Hi fe50, and thanks for your welcome

I'm pretty sure that I am already trying scriptless bracketing. The steps I mentioned (and linked to) are exactly the same as in your link. That is:

-> set "TV bracketing value" to [2 Ev], "Brackting type" to [+/-], exit Alt mode, use the custom timer (set up to 1s delay, 3 shots)

I can give it another try this evening, maybe it's some other setting like RAW suffix. I'll check!

Cheers,
Paul