Slowing down Ethernet - Page 2

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Re: Slowing down Ethernet



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Radio
use
communication

As others have mentioned, you should consider RS422 and PPP (or SLIP). You
can use all the established TCP/IP protocols (SNMP is not tied to ethernet).

You can run it as slow as you want (as some of us are painfully aware from
the good old days), and it is easy and cheap to implement (SLIP/PPP is well
supported on many different microcontrollers).

You could also consider10Base-FL if you don't mind buying used equipment.
People are practically throwing the stuff away on eBay (looking now, someone
is selling 20 10Base-FL to 10Base-T media convertors for $82).



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Re: Slowing down Ethernet


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I'm an FAE for Freescale Semiconductor.  We have an Applications Note for
PPP on an HC08 class microcontroller which describes exactly the application
KM is attempting to solve.
http://www.freescale.com/files/microcontrollers/doc/app_note/AN2120.pdf

The source code can be downloaded from the following Freescale
microcontroller product page:
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=68HC908GR8
Look for "an2120sw"

If the MC68HC908GR8 doesn't have the right peripheral set for KM, there are
plenty of other options to choose from that will run this code with little
or no modification.

-Gary




Re: Slowing down Ethernet


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Thanks all.

You have been very helpful

Regards

Martyn

--
===========================
Martyn Kinder G0CZD

Open-Xchange 0.8b5

http://www.czd.org.uk



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