I recently purchased a 1995 Jaguar Sovereign (you might know it as a Jaguar XJ, but the Sovereign spec doesn't actually wear an XJ badge anywhere). It has a CD changer in the boot and a radio/cassette in the dash. The radio is rumoured to only accept a specific model of CD changer while using the Alpine M-BUS protocol. What I want to do is build an M-BUS to UART adaptor out of an Arduino, or a TI Stellaris Launchpad (mine's on back order) and use that to control a Raspberry Pi running an MP3 ...
