On Thursday 19 May 2005 02:47 pm, Olin Lathrop scribbled:
> SPI and IIC are not good choices because they have single ended signals and
> their impedences are designed for staying on a single board and not being
> exposed to environmental noise.

Yep -- noise will be a problem here.  But wouldn't the drivers (such as the 
Philips part I mentioned) correct this?


> A few years ago I think the answer would have been RS-485, but today CAN is
> the better answer.  CAN is differential, and you get the lowest protocol
> levels implemented in hardware right in the microcontroller.  I think it's
> exactly what you're looking for.

But differential means I would need 2 wires for each direction, or 6 wires 
total including power and ground, right?  I never thought about CAN for this, 
but I'll go have a look in to it.

Cheers,
-Neil.


-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist