AVR-Chat

--- In AVR-Chat@yahoogroups.com, James Washer <washer@t...> wrote:

> In neither case do I need much speed.
> ... I'd thinking tens of bits/second
> is all I need.

I thought so. CAN is overkill. You need something low-speed and 
robust that is simple to implement. I would suggest looking into LIN. 
It is a multi-drop, two-wire serial network with a master/slave 
architecture which fits your description.  It also conforms to the 
general direction of the suggestions other people are making. A big 
advantage is you can get the specifications for free! Since the whole 
project is private, you could implement any part of the standard you 
wanted to without the obligation of complete conformance. In other 
words, treat it as a bunch of suggestions.
http://www.lin-subbus.org/

What have you put together for hardware? There are people here who 
may have products that would help you get going. Maybe a MAVRIC from 
BDMICRO? I have a JTAG on-chip debug interface called the AVR ICE-
Cube at http:/www.ecrostech.com and also a carrier for the AVR 
Butterfly, though I don't think the Butterfly is what you want.

Graham.