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'Ethernet and PIC possible ?'
2000\02\03@175403 by Patrick J

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2000\02\03@181448 by bill

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> I would like to connect a PIC to my LAN. (Ethernet TP RJ45 10 or 100 mbps
> TCP/IP) The purpose would ofcourse be to send and retrive data to and from
> PIC.

Here's an article about interfacing an Atmel chip to an ISA
ethernet card. Should be doable with any reasonably quick
microcontroller with enough I/O pins. Perhaps not exactly what
you're looking for, but maybe good for inspiration.

http://www.chipcenter.com/circuitcellar/july99/c79bl1.htm


---
                                       Peace,
                                       William Kitchen

The future is ours to create.

2000\02\03@214101 by Patrick J

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Interesting, thanxs !

----- Ursprungligt meddelande -----
FrŒn: William Kitchen <spam_OUTbillTakeThisOuTspamiglobal.net>
Till: <.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU>
Skickat: den 4 februari 2000 00:13
€mne: Re: Ethernet and PIC possible ?


{Quote hidden}

2000\02\04@170114 by Patrick J

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Hello !
I would like to connect a PIC to my LAN. (Ethernet TP RJ45 10 or 100 mbps TCP/IP)
The purpose would ofcourse be to send and retrive data to and from PIC.

I need some help on howto go about this... Any schematics or code would be awe.
I see two major issues:
   1. Physical conncetion to LAN
   which inteface ICs could be usefull ?

   2. Howto program the PIC to 'talk' to the LAN TCP/IP
   Eg. what needs to be sent and recived to have the PIC to respond properly

I just measured on the rx/tx lines on the lan, it is +(-) 4vpp.

Btw: sorry for posting in rich text before.

TIA Patrick

2000\02\04@171248 by Randy Glenn

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Check out http://www.embeddedethernet.com - UDP has been implemented on the
PIC16C74 there.

In the past, many people have pointed out that the PIC doesn't have enough
RAM to do real TCP/IP - but it can be done, if you use the 16KB of SRAM
contained in many PC ISA Ethernet Chips (like most of the NE2000 models).
This is what was done on the PicoWeb (http://www.picoweb.net). which is based on an
Atmel chip.

-Randy Glenn
E-Mail: PICxpertspamKILLspamyahoo.com
Web: http://i.am/PICxpert

Currently wondering why I can't get in to Safe Mode - where's a Mac when you
need it?

{Original Message removed}

2000\02\04@201031 by John Mullan

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Someone the other day put a link to Circuit Cellar that put an Atmel and ISA
ethernet card.  Even have the source code.  It runs a TCP/IP stack and
webserver.

It really is something to look at.  You can download a complete PDF document
of the whole thing.

http://www.chipcenter.com/circuitcellar/july99/c79bl7.htm

I might take the time to build this myself (some time this millenium).

{Original Message removed}

2000\02\04@212144 by Patrick J

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Thanxs a million, this was *excactly* what is was looking for !
The PicWeb thingy is like 'cheating' ... don't wanna bark up that tree.
(still a neat idea)


> Check out http://www.embeddedethernet.com - UDP has been implemented on the
> PIC16C74 there.
>
> In the past, many people have pointed out that the PIC doesn't have enough
> RAM to do real TCP/IP - but it can be done, if you use the 16KB of SRAM
> contained in many PC ISA Ethernet Chips (like most of the NE2000 models).
> This is what was done on the PicoWeb (http://www.picoweb.net). which is based on an
> Atmel chip.

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