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Car Stereo control via dock port / Apple Accessory Protocol

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sovamind:
I did some searching on the forums but didn't find anything that has been posted recently (mostly stuff from 2012 or much older) about this topic.  I installed Rockbox on my iPod Video 5G and while it works, I can't get my car interface (GROM) to recognize the iPod. 

Is this still the expected behavior?  Still?

It seems that the AAP is pretty well documented and understood at this point, so I was expecting support would be working since it was almost working for people back in 2012.  Here is a site I found which seems to detail the protocl: https://nuxx.net/wiki/Apple_Accessory_Protocol

Is there any chance that this could be fixed / added to Rockbox?  An iPod Video modified to take SD cards gives you a platform with physical buttons, long battery life, capacity up to 256GB, and durability.  Rockbox adds FLAC support but if I can't control it from my car stereo then I'm not going to be able to use Rockbox.

sovamind:
Also the iPod Status page says that accessory support is still in progress (http://www.rockbox.org/wiki/IpodStatus#General_tasks) but then it says a serial driver has been created and links to a tracker page that is marked as completed/accepted here: http://www.rockbox.org/tracker/task/8624

saratoga:

--- Quote from: sovamind on August 08, 2014, 07:40:34 PM ---It seems that the AAP is pretty well documented and understood at this point, so I was expecting support would be working since it was almost working for people back in 2012.  Here is a site I found which seems to detail the protocl: https://nuxx.net/wiki/Apple_Accessory_Protocol
--- End quote ---

That document is from the early 2000s.  Everything there was added to rockbox many years ago, but Apple regularly updates the accessory protocol, so if your stereo expects a newer version, it won't help.


--- Quote from: sovamind on August 08, 2014, 07:40:34 PM ---Also the iPod Status page says that accessory support is still in progress (http://www.rockbox.org/wiki/IpodStatus#General_tasks) but then it says a serial driver has been created and links to a tracker page that is marked as completed/accepted here

--- End quote ---

Does your car stereo even use serial for IAP?  Many newer devices use USB only. 

Trzyzet:
Hello,

I know this thread is dead and very old. Maybe someone will want to work on that?
That's what I found, uploaded on my ftp: http://trzyzet.usite.pl/pliczgi/25187555.pdf

BriggTrim:
Hi....Most vehicle frameworks/recipients were really conceptualized in view of the iPod - the initial ones utilized an exceptional link to permit it to interface with the CD transformer input, and permitted it to be completely controlled correspondingly through the headunit. Kenwood eventually was utilizing a HDD-based trade for the CD transformer, however when capacity got less expensive and individuals don't need that thing hanging in the storage compartment, we got USB ports for thumb drives. At the point when Android got well known some of them added USB have similarity, where the telephone goes about as the slave - basically it's simply a capacity gadget when connected, without crippling the telephone capacities and furthermore empowering calls to go through the sound framework in the vehicle.

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