PPM in trainer/TX module

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sgofferj
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PPM in trainer/TX module

Post by sgofferj » Tue Jul 02, 2013 10:52 pm

Hi,

that might be a stupid question, but...
The trainer port is a PPM in, right? Is the signal basically identical to the signal sent to the TX module?
E.g., could I connect the module out of one 9x to the trainer port of another 9x?

I'm asking because my integrated GCS is still spinning around in my head and with the Sky9X board not available any more, I'm looking for other options.
I was also thinking of building some joystick box with PPM out to use on the trainer port and from there I had the idea to build my own multicopter-specific TX using Arduino and FrSky modules...
Yet another idea spinning in my head is using an Arduino with USB host shield and make it a USB -> PPM converter...

-Stefan

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Kilrah
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Re: PPM in trainer/TX module

Post by Kilrah » Wed Jul 03, 2013 5:15 am

Yes, trainer port inputs and outputs PPM.

sgofferj
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Re: PPM in trainer/TX module

Post by sgofferj » Wed Jul 03, 2013 6:27 am

Is that an identical signal to what goes to the TX module?

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MikeB
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Re: PPM in trainer/TX module

Post by MikeB » Wed Jul 03, 2013 8:37 am

Yes. Why use the module out signal. Set the protocol to PPMSIM and the PPM signal comes out the trainer port.

Mike.
ersky9x/er9x developer
The difficult we do immediately,
The impossible takes a little longer!

sgofferj
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Re: PPM in trainer/TX module

Post by sgofferj » Wed Jul 03, 2013 11:32 am

That was just a comparative question to make it clearer for me :).
Does anybody have some advice for a useable lightweight Arduino library for PPM generation? I've googled a bit but the only real thing I found was the rclib which also includes mixing and whatnot...
Or maybe some sample code how to generate a valid and stable PPM signal?

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