Is it possible to set usb voltage via script? - Script Writing - CHDK Forum
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Is it possible to set usb voltage via script?

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Offline Kermie

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Is it possible to set usb voltage via script?
« on: 13 / October / 2009, 04:44:05 »
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Hello

Is there any method one could set the usb voltage via script? If not, is such a feature easy to implement? I know there is the function for testing if usb voltage is set, but can it be set in a script for the camera to simply trigger some external device, such as another camera. I remember reading that it is possible to blink the led and use that to control other devices, but I would prefer the usb port as it is easier to plug a cable there. I was playing with the thought that I could use ixus 870 to trigger my slr by motion detection or use it as an intervalometer.
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Offline Microfunguy

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Re: Is it possible to set usb voltage via script?
« Reply #1 on: 13 / October / 2009, 05:57:00 »
Quote from: Kermie on 13 / October / 2009, 04:44:05
Hello

Is there any method one could set the usb voltage via script?

No, the USB V+ is an input logic signal, not an output.

 
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If not, is such a feature easy to implement?

You may be able to set the state of the output data lines.
There are some problems with it, EWAVR knows the details.i

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it is possible to blink the led and use that to control other devices

That is what I do using the very bright autofocus LED.
I also blink the LED to talk to a microcontroller.


David
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