hmm. i've been neglecting you guys.
time for an update.
so i ran into problems with the Unigen RF modules i was using.
there were several undocumented aspects of the modules in the Datasheet, one of which lead to horrible transmission errors when the system was exposed to any sort of 2.4GHz interference. (of which there is a lot anywhere with wifi...)
2 months later i managed to work out the problem.
after chasing lots of red herrings, playing with Cypress CYRF6936 registers,
it turns out the module will only receive correctly is one of it's undocumented pins (PACTLn) is forced low.
so anyway, i now have a nice stable RC system that can relay information back from the receiver.
there has been a reasonable amount of interest in this on RCgroups.com
and i am currently putting the finishing touches to firmware that will allow it to be used as just a RC system that reports battery life and signal strength at the receiver back to the transmitter.
additional sensors (airspeed, altitude, GPS , etc) will be added later and that data will also be transmitted back to the controller.
i also need to provide an option to allow the controller to be operated using a laptop instead of a PS2 controller....
anyway, building instructions here:http://sites.google.com/site/mrdunk/