Hi Recyclojunk64,thanks, sounds not too bad ;-). I will order now a few resistors (for r2r network) and also an 8Bit DAC to get started somehow. Where inside CHDK I can read the value of the temperature?I mean since I want to detect quickly if the resistor value changes I need some place in the source code to read that value and trigger an action (e.g. zoom in / out). Best would be an interrupt of course but I doubt that there exists one for the temperature sensor. So I think I have to poll in certain intervalls is that correct? Where should I place the code exactly?How do I read the temperature value for my S110? Is there already a function available?Thanks again for any help!
I thought that there is maybe something in the trunk already.
You tell me now that the code is inside this thread so I will take a look back and try that first.
If I face some problems hopefully someone can assist here?
Seems the easiest way to read the value is to read it directly from the appropriate MMIO which I believe is 0xc090004a.
On a completely unrelated note, I have a question for the CHDK experts. Is it possible to use CHDK to communicate with an external flash via the hot-shoe? I'm pretty sure that those 4 pins on the hot-shoe are used to communicate data such as brightness and other stuff with the flash right? Well could that be used to communicate data between two cameras with hot-shoes?
I'm not aware of any work done on this, but it certainly seems like something that should be possible to reverse engineer.You might not be able to do two way communication with just the hot shoe, but it should be possible to use it as a controllable output.
I'm not sure if this is related to your requirements, or indeed if the hot-shoe in question talks this particular protocol, but perhaps this is worth a look.
Thanks! It also took me to here which also has a fairly comprehensive list of commands and a pinout.
So if I could trick the camera into sending out standard (or non-standard) commands to the hot-shoe that might work quite well. Anyone have any idea how this could be done?
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