HDMI power and alternative remote inputs ( was Re: G7 X porting thread)

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Offline Ant

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Re: HDMI power and alternative remote inputs ( was Re: G7 X porting thread)
« Reply #40 on: 11 / January / 2019, 05:04:06 »
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Are there any other alternatives, for example via the USB port?

 :)
http://lmgtfy.com/?q=arduino+usb+ptp

Re: HDMI power and alternative remote inputs ( was Re: G7 X porting thread)
« Reply #41 on: 11 / January / 2019, 05:18:14 »
http://lmgtfy.com/?q=arduino+usb+ptp

Interesting…,
But I have thought more that the Arduino is a simple slave device and only takes over the control of the engine or light ...

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Offline reyalp

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Re: HDMI power and alternative remote inputs ( was Re: G7 X porting thread)
« Reply #42 on: 11 / January / 2019, 23:26:23 »
I would like to control an external device (Motor Slider, Plant Lamp) in a time-lapse script via Arduino. Since that seems to me to be an elegant solution with the HDMI 5V output. If I understood correctly then the 5V voltage can also switch in recording mode.
Yes
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Does it work even if the camera is in half-pressed shutter?
On sx710 at least it does

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Could you also generate pulses (3 * 50ms with 50ms break)?
I don't think anyone hast tested the reaction time. Voltage seemed take noticeable time to drop after calling DisableHDMIPower with just multimeter, but faster with when the +5 was also connected to the hotplug detect pin.

If you want to experiment with this, you can find EnableHDMIPower and DisableHDMIPower in the funcs_by_*.csv for your camera, and call them with call_func_ptr(0xwhatever)

Note that HDMI power defaults to ON in playback mode, so whatever is reading the output should be prepared for that.

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Are there any other alternatives, for example via the USB port?
We don't have a way to use the USB output without a full PTP connection.
Don't forget what the H stands for.

Re: HDMI power and alternative remote inputs ( was Re: G7 X porting thread)
« Reply #43 on: 12 / January / 2019, 02:41:03 »
If you want to experiment with this, you can find EnableHDMIPower and DisableHDMIPower in the funcs_by_*.csv for your camera, and call them with call_func_ptr(0xwhatever)


Thank you for the explanation. As soon as my cable is there I will experiment with it.