I have a time to study vwcdpic AVR port for arduino mega which was ported by guy vti on hackaday.com forums and make changes to run it on arduino deumilanove/uno/nano. Code is on github. This is full software based, no hw SPI is used, so is easy to port. Future planes are atmega8 port, which is little diferent in speak of timers.. and attiny85 port of corse, cose I have nothing better to do :D
then headphone support emulating pushbuttons, and bluetooth...
to make it easy to test I clean/tuneup/fixed radio emulator
