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torne, if I'm understanding your question, the cable connector to the head unit has three plugs:
The accessory code is in /apps/iap.cI'm not sure if theres currently anyway to log the IAP commands, but you could pretty easily add LOGFs or just record the entire exchange to disk to see where it gets stuck.
The first thing to do would be to work out whether the protocol runs over serial like the known IAP protocols, or whether it's done over USB (perhaps SCSI requests over mass storage). There are various things around the internet which suggest that at least some dock interfaces use the latter. This could be done by adding a bunch of debug logf statements to both the IAP handler and the USB stack.
One thing that you could do which would be relatively simple is to work out which of the pins on the dock connector are actually connected to the car kit. This would probably answer some of the basic questions (such as "is it using IAP over serial or something over USB") pretty quickly. Grab a multimeter
Have you been able to check out the current version of the Rockbox source, and compile it to a working build (without modifying any of the code)? Make sure you can do that first.
We only support extremely basic remote protocols, pretty much just commands for play/pause/ffwd/rewind/etc, so that's unlikely to be used by a head unit that displays actual information about what the device is playing.
Quote from: torne on January 24, 2011, 06:44:46 PMOne thing that you could do which would be relatively simple is to work out which of the pins on the dock connector are actually connected to the car kit. This would probably answer some of the basic questions (such as "is it using IAP over serial or something over USB") pretty quickly. Grab a multimeter Well, that would be difficult, as the box it's plugged into is concealed in the console or the dash - not sure exactly, as a professional installer did it. Perhaps I could ask the tech support guy over at Parrot, he's generally pretty forthcoming, but they would probably consider this proprietary information.
OK, I understand...I'm beginning to think I may be booting the OF in my car "forever"...or embarking down a very long road.
You said it ended in an 8 pin plug, or something? I don't mean what's connected to what, I just mean which dock pins are connected *at all*, to anything. So, you'd only have to test the two ends of the cable... nothing to do with the devices on either end.
Why not just skip the hassle and connect thru the line-in on the Parrot unit? You would lose the ability to use its display and ipod controls, but the benefit is that you'd be able to actually use Rockbox.
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