On Wednesday 25 May 2005 12:05 pm, Jan-Erik Soderholm scribbled:
> Probably becuse RS485 isn't a *protocol*, but a specification
> of an electrical transmission medium/cabling. You don't write
> *specific* software for RS485 (like you can do for e.g. CAN).
> You have to add whatever protocol you need on top of RS485.


Good point.  I was hoping though to find an example for a 1-master, many-slave 
system that could show how others have addressed some questions I have.  For 
example, when the the master polls each slave, if that slave has nothing to 
request, should I have it send back a response to the master saying that?  Or 
do nothing and have the master wait for a timeout?  At this point, I've 
decided that I would have it send back a message saying that there's nothing 
to be done, but was curious how others addressed this issue.

Cheers,
-Neil.


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