Frsky CPPM PPM input

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Frsky CPPM PPM input

Postby ivanhoes » Tue Apr 24, 2012 1:06 pm

Sombody tried to use the Frsky PPM receiver with success?

I am not getting any data in the gluonconfig when connecting via the PPM CPPM.
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Re: Frsky CPPM PPM input

Postby Tom » Wed Apr 25, 2012 7:26 pm

I don't have such a receiver to test it... Do you have a scope?
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Re: Frsky CPPM PPM input

Postby ivanhoes » Fri Apr 27, 2012 5:32 pm

No, unfortunately not...

But maybe this could help? It is the manual with a picture showing some scope-similar information

http://www.frsky-rc.com/uploadfile/201204/20120426092731979.pdf
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Re: Frsky CPPM PPM input

Postby Tom » Sun Apr 29, 2012 5:16 pm

Hmm sorry, seems like the way it should be...

Without a frsky receiver it will be hard for me to find out the problem :-)
You'll have to use PWM
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Re: Frsky CPPM PPM input

Postby Schaltkreis » Sat Jun 30, 2012 9:54 am

The Frsky CPPM Signal has High level 3,3V and Low level 0V.
One Frame is only 18ms long. So it is possible, that the overlong startpulse is shorter than a channel pulse, if all the channels have long pulses at the same time. you can mesure from rising edge to rising edge or from faling edge to falling edge, it should be the same.
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