Well, although I learned PIC programming at school, it's now nearly ten years ago and I have no experience and no material to program PICs, so definitely, I'll do it with a PC serial port or I won't do it at all... By the way, you mentioned "D2B" but are you sure it's the protocol used here ? 5 minutes google search for D2B makes me think it's a very generic protocol, much more than what I'd expect for a simple CD-changer/headunit dialog...Originally Posted by mox
The more I think about the problem, the more I think it would make sense that once the head unit source is switched to a CD changer, it delegates all CD handling to the changer and only "passes through" commands from its front panel to the changer and replies back to its display. In that case, the only thing that *has* to be implemented is the "handshake" protocol so that the head unit always thinks that there is a changer present. Then maybe send a static "CD 1 - Trank 1 - Time 0:00" and off we go...The OEM display in my Clio's dash is somewhat limited, as it only displays track# and cd#, so no remaining time or anything. I guess the ppl of connects2.com have found a way to mimic a single cd with a single endless track. Once I select the cd changer as a source, the HU permanently displays "CD1 - TRACK 1".
Somehow I am glad my display is limited