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Ethernet to serial

Discussion in 'Electronic Design' started by Dirk Bruere at NeoPax, Apr 27, 2009.

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  1. Rich Webb

    Rich Webb Guest

    As an alternate to the XPort (which I've only played with but John L.
    actually uses ;-) if you're really staying with UDP/IP and not entering
    the TCP jungle then it's not huge effort to code up your own handler.

    The pub I used for a reference was "Networking and Internetworking with
    Microcontrollers," although there are certainly others out there. Came
    up nicely on an MSP430 dev board.

    As in many things, it comes down to the build/buy decision.
  2. Nico Coesel

    Nico Coesel Guest

    Where? I may have to built such a box (with http to send IR) but if it
    can be baught, it would be easier to just buy it.
  3. You, and Dirk, may consider using a small FPGA:
    shows how to send and receive UDP packets.
    You could likely use the internal block ram to store pre-defined IR patterns,
    to avoid any timing issues, that would allow TCP/IP then too.
    It really is only a few lines of Verilog and 2 transistors needed...
  4. FPGAs have always had a bit of a fascination for me, but that's partly
    because its one major area of technology I've never got to grips with.
    It seems a bit intimidating:-(
    Right now I'm looking for a "solder three pins" solution...

    Dirk - Transcendence UK - A UK political party - Our podcasts on weird stuff
  5. Since I dunno exactly what the requirement is to drive the IR output,
    qua timing, it is difficult to answer.
    Normal IR remotes (if that is what it is for), are not that
    fast in data rate, and perhaps it can be done with one of those cheap ethernet
    to RS232 modules that John Larkin talked about here some time ago,
    maybe using the control lines or even the serial out itself.

    I also have a small module, IIM7000, from mcs electronics, but that
    needs a 8051 (memory mapped address I/O) like micro to configure it for
    http server or whatever, the C sources are available for free somewhere:

    They have some new products, I think the latest board IIM7010A also has i2c on the header pins,
    so you can program it via 3 wires (ground, data, clock),
    mine has not, so I have not tried.
    <30 Euro, if you already have a micro.

    There exist also several micro boards with embedded Linux that have a piggy back board with ethernet TCP/IP.
  6. Nico Coesel

    Nico Coesel Guest

    Define many... We may have a more or less standard solution which
    offers a simple ethernet interface to several interfaces. I can send
    you more info by e-mail.
  7. Nico Coesel

    Nico Coesel Guest

    Way too complicated and expensive. A small MCU, a PHY and a TCP/IP
    stack is all you need. And more flexible too.
  8. "Many", as in at least one and possibly up to 100 or so per year.
    Feel free to send me an email please. However, bear in mind that it's
    reasonably price sensitive.

    Dirk - Transcendence UK - A UK political party - Our podcasts on weird stuff
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