I tried to manipulate exposure times, and it seems that as long as I am in LONG SHUTTER mode (for night pictures), CHDK is able to set the shutter speed both short and long...it's not clear that this always works. Seems like you need a particular order of doing things.
So it looks like you could control much more than the Canon menu allows, but you need to use chdkptp (or gui version to change mode) to enter the correct propcases etc. Is there a standard way to implement things like this? Just scripts on the camera?
You should be able set exposure setting manually using overrides in the "Enhanced Photo Operations" menu, but that should work in P and Auto modes too.
As far as I can see, the camera software in AUTO mode, doesn't successfully override the auto exposure/shutter speed. I tried two shots, one shrtexp of 1/640sec which came back at 1/25 in the exif, and one long exp of 30 seconds which came back at 1/20 in the exif. Both images seem to be exposed according to the setting recorded in the exif info. So maybe there's an adjustment needed in capt_seq.c. Also, although darkframe AUTO, OFF, ON is enabled in the menu, setting it OFF on long shutter, and longexp override in the menu does not seem to suppress the darkframe subtraction and acquisition.
It´s probably a bug, ....
Quote from: nafraf on 10 / December / 2016, 15:30:48It´s probably a bug, ....I think I might have found some new "Bugs", some typos, and some other stuff that might need fixing.
The Ixus 150 seems to be a Ixus 145 with additional hardware and firmware, in regard to CHDK Porting.
"loc_FFAC8028:\n"" BL wait_until_remote_button_is_released\n" // added" BL capt_seq_hook_set_nr\n" // added" LDR R0, [R4, #0x20] \n"" LDR PC, =0xFFAC802C \n" // Continue in firmware);}
I found using poke(0xa0e0,1), that 0xa0e0 is the nrflag address for darkframe control. Unfortunately, the hook below, only seems to be effective on the second shot at suppressing darkframe. I think this happens in other ports as well. Not sure if this could be fixed by moving the hook earlier or not.
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