Aspect Ratio Button

Hi folks! This is my camera:



Does anyone know how can I press the Aspect Ratio Button in ubasic or lua? I've tried:
  click "aspect"
  click "ratio"
  click "wide"
but none of them work

This key doesn't appear to be included in the kbd code. If you can find the physw_status bit for this button, we might be able to add it.

In lua, you could probably simulate a press by with
post_levent_to_ui("PressAspectButton")
post_levent_to_ui("UnpressAspectButton")

These functions are not available in ubasic

reyalp you are a genius - it worked exactly as you said!

    post_levent_to_ui("PressAspectButton")
    post_levent_to_ui("UnpressAspectButton")

Then I just needed to wait for the camera to finish changing aspect ratio (takes anywhere from 100ms to 800ms):

    repeat
        sleep(50)
    until get_prop(294) == 1

And the problem was solved - thanks a million for your help!

So how can I find the physw_status bit?

So how can I find the physw_status bit?

You need to watch the values of physw_status while pressing the button and figure out which bit changes.

physw_status is an array of 3 words. Some of the bits change continuously. Others correspond the various buttons/switches on the camera. Generally pressing a button makes the corresponding bit go to zero.

If you are comfortable modifying C code and building your own CHDK, the simplest way to do this is probably to modify gui.c  gui_draw_debug_vals_osd to show all 3 words of physw_status. One of the commented out sections does this.

If you don't want to modify CHDK, you can use the memory browser in the debug menu. The start of physw_status is 0x12DA4 both 200h and 201a firmwares. The bit for this button is likely be in the second word ( 0x12DA8 ) like most of the other buttons.

More pure genius - it was exactly where you said! I used the memory browser and enabled show misc values:

* 0x12DA8 is normally 0xffffff but becomes 0xdfffff when I hold the aspect button
* I guess that means the aspect button's physw_status bit is 0x00200000!

Thanks for your help again reyalp - I sure hope you can add it in a later build