PPM signal generation Timming

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What steps will reproduce the problem?
1. I use a FUTABA FAAST TX module adaptation to this radio (is a TM-7 in a JR 
case ).

It working OK with the factory firmware and even check it with Radioclone FW 
and working OK.

I think there are any difference in the PPM generation timming, my Futaba 
module refused work  with any version of thus FW.
Please, i love this firmware and i like use with my futaba module. 
I would be very grateful if this could be corrected.

2.ENHANCEMENT A good idea is add one option for PPM signal inversion in the 
model setup menu
3.

What is the expected output? What do you see instead?
PPM signal compatible 100%

What version of the product are you using? On what operating system?
1.2038thus. I checking  several of them with the same result

Please provide any additional information below.
Thank you for this piece of SW, Great work very appreciated here.

Original issue reported on code.google.com by [email protected] on 23 Feb 2011 at 12:09