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RE: [lpc2000] LPC 'networking' with PLIP/SLIP/LwIP

2005-11-24 by Bruce Paterson

> I haven't played with LwIP yet, I have an Olimex board that 
> I'll use at some point with the CS8900 interface.
> But I was wondering if anyone had used SLIP or PLIP in 
> applications (LPC or not really)?

I have implemented a SLIP-like application on a MC68360 in the past.
SLIP is really incredibly simple. It's the IP packets straight out of
the TCP/IP stack with a checksum shoved on the end. I suspect PLIP may
be as trivial.
The SLIP I was using wasn't normal...it could communicate multidrop
using cascaded devices all talking synchronously (it was a multi-point
IP network). It never made it out to the real world, but it certainly
all worked.

At the time the processor was running pSOS+ (a thing of the past now)
which had a TCP/IP stack and an poorly/undocumented network interface
layer so I was able to plug in there. pSOS+ = $$$$ and I'd never go
there now.

Despite the fact the 68360 had dedicated communications engines and very
cool serial port support, the power of the LPC main processors is huge
by comparison. You should have no problem.

It's worth including compressed header SLIP support if you're going that
way. It cuts down the traffic by removing redundant TCP/IP packet
headers and replacing them with a token to refers back to the original
header.

> Happy Thanksgiving! (to all the Americans out there anyway)

Oh yeah this is the time of year all you Yanks die from badly cooked
turkeys :)

Cheers,
Bruce

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