Aux Input Device
April 30, 2007
As a simple aux input device, the HMLiberator works as designed. However, because of the 500K resistor in the headshell (as opposed to a 1M in my adapter) the iPod doesn’t pause when the vehicle is turned off.
Implementing the next/previous track stuff is going to be a chore, because the Honda Music Link is a lot smarter than I thought. It expects certain replies, and it expects those replies to be more consistent than I expected. Therefore, I might have to write a little iPod emulator thing which keeps consistent state, sends appropriate replies, etc.
Basically: Uggh.
it’s time for some reverse-engineering.
what info do you have to limit the trouble you face?
I have this partial doc of the Apple Accessory Protocol.
I think I can do it from this… I just might need to write a more robust iPod emulator-ish-thing in the PIC.
I’ll find out more tomorrow once I can sleep on the problem.
I might pursue getting the actual docs from Apple. I’ll have to see what the NDA requires, though.
sounds weird.
The docs cover it end to end and would be most helpful. But I’m not sure I could release the project as open source, should I get them. :(