28 Jan
2008
28 Jan
'08
8:36 p.m.
Sean Conner wrote:
Each computer has two serial connections. Can you
send and receive on a
single "port" at the same time? Can you send and receive on both
"ports" at
the same time? The design of the protocol depends somewhat upon the
The sync ports are unidirectional, but they can be run together, so an
SPI-like bus could be created.
capabilities of the ports. If you can't, then you
might want something like
token ring, where a "transmit" token is passed around, and any computer with
the "token" can transmit. If you can send/receive without problems on
either port, then just let the computers transmit at will.
On the latter, I don't understand. Who would they transmit to? How
would I deal with collisions?
About the only real problem to come up is
configuration---how does each
computer get its address on the network? Manual configuration? Automatic?
I cna hard code the addresses, but how does the ring/bus know when a
machine is alive, etc.
-spc (You might want to look at how AppleTalk works
... it's pretty neat
how it works ... )
I will look into it.
Jim