if someone is interested at the address below you can find a little free project to build an interface for connecting your RC radio to the PC via USB using the new USB flash chips 18F2455/2550 from Microchip:
http://projects.qstep.net/
clicking RC Joystick NG^2 you'll be redirected to the last release of the project that has the following main features:
- flash pic: can be programmed more than once
- two joystick instead of one for a total of 8 analog axes with about 5000 points resolution each and 16 buttons (up to 24 channels readed from radio).
- joystick controls can be freely assigned by user to radio channels; these assignments are stored inside pic (non-volatile) eeprom and are programmable directly via USB with a software utility.
- few components and very small pcb (about 2x4cm, smt components)
- the project is totally free... on the site you can find the binaries, sources, schematics and layout of the circuit
require a radio equipped with a PPM output (buddy box connector).
ciao
alessio e andrea
http://alessioandrea.qstep.net/