I'm trying to figure out what is the serial protocol that is used in Honda Odyssey 2007 for communication between RES (rear entertainment system) DVD drive and main audio head. I was convinced it would be GA-NET (IEBus), but after failing to use a device to decode that bus, I hooked up a scope and was surprised to see that the wires are not differential but rather RX/TX.
Here's how they talk:
And this is a closeup of what I believe is somewhat like keep alive response from DVD.
I was really surprised to see this. Baud rate seems to be in between 1200-4800 if my assumption is correct - this lust closeup looks like 3-4 bytes (if this is a 8-bit exchange at all). Or maybe it's LIN and the packet sizes are 11 and 29 bits? I'm very confused, will appreciate help.
Thanks a lot in advance!
Sorry about the markup - I'm totally unable to figure it out. When you read help - it looks really simple, but when you try to actually use it - it's total failure.