SX420 IS port - page 9 - DryOS Development - CHDK Forum

SX420 IS port

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Offline reyalp

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Re: SX420 IS port
« Reply #80 on: 04 / November / 2020, 13:20:52 »
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Furthermore, I enabled AF-point zoom in order to focus better, but it only appears outside of alt mode because it must recognize the shutter as half pressed and about to take a picture. In alt mode, the shutter halfway enables the shortcuts and fully pressed just executes the scripts.
That's normal behavior. To shoot, exit alt. Your overrides will still be applied. You just have to toggle in/out of alt to adjust the setting.

Unfortunately, this probably does make it inconvenient to use point zoom with CHDK SD override, but that won't be fixed by changing the script key. You could perhaps write a script that allows you to adjust the focus position while in half press (if it doesn't crash)
Don't forget what the H stands for.

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Offline Pedro

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Re: SX420 IS port
« Reply #81 on: 05 / November / 2020, 07:56:13 »
Yeah, well, I´m not sure which function calls AF-Point zoom, but it would be interesting to be able to activate it only when focusing manually. I have an FZ20, which has MF and this function but not when halfpressing the shutter, but when moving the focus ring. It comes in handy since the screen ain´t really large and high def. Same with the sx420. What I did notice is that the camera activates it because, when half pressed, it assumes it is focusing. Apply to it focusing manually with sd override...
Hey, tiny question. I tried searching for the chdk firmware editor but didn´t really find anything. Most of the files had been removed or were missing. Any idea on where I can download it? Don´t know the FW language, but have a wide experience with arduino, and I´m quite fast doing collages of code functions and learning things like that

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Offline blackhole

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Re: SX420 IS port
« Reply #82 on: 05 / November / 2020, 08:44:28 »
Yeah, well, I´m not sure which function calls AF-Point zoom, but it would be interesting to be able to activate it only when focusing manually. I have an FZ20, which has MF and this function but not when halfpressing the shutter, but when moving the focus ring. It comes in handy since the screen ain´t really large and high def. Same with the sx420. What I did notice is that the camera activates it because, when half pressed, it assumes it is focusing. Apply to it focusing manually with sd override...
Hey, tiny question. I tried searching for the chdk firmware editor but didn´t really find anything. Most of the files had been removed or were missing. Any idea on where I can download it? Don´t know the FW language, but have a wide experience with arduino, and I´m quite fast doing collages of code functions and learning things like that
The cameras are powered by an ARM processor.
To add new features to chdk, you need a lot of knowledge about ARM assembler and C, and of course the skill of reverse engineering.

Here you can find the complete toolchain for compiling chdk if you are using Windows OS: https://chdk.setepontos.com/index.php?topic=12752.0
The source code will be automatically downloaded for all supported cameras.
The source code is also available here: https://subversion.assembla.com/svn/chdk/trunk

A few more useful links:
https://chdk.fandom.com/wiki/Firmware_analysis_with_Ghidra
https://chdk.fandom.com/wiki/Adding_support_for_a_new_camera
https://chdk.fandom.com/wiki/Modifying_the_CHDK_Sources
https://chdk.fandom.com/wiki/DryOS_Porting
https://chdk.fandom.com/wiki/Adding_Firmware_Features

 

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