Re: gEDA-user: powermeter board, with less ground planes :-)

[Larry Doolittle <ldoolitt@xxxxxxxxxxxxxxx>]

DJ -

On Wed, Nov 12, 2008 at 12:03:13AM -0500, DJ Delorie wrote:
> I'm not sure how much smarts I can put in an R8C/20.  The biggest
> available one has 64k of flash and 3k of RAM.  I was thinking of using
> just UDP - that gives me DHCP, sNTP, and a way to send back
> measurements.
>
> OTOH if a tiny TCP fits, perhaps with a tiny RTOS, I can use the same
> code for talking over TCP as for talking over USB.  I'll need a way of
> storing calibration data anyway.

lwIP?
  http://www.sics.se/~adam/lwip/
  "This makes lwIP suitable for use in embedded systems with tens of
  kilobytes of free RAM and room for around 40 kilobytes of code ROM."
Nope.

uIP?
  http://www.sics.se/~adam/uip/index.php/Ports
  Support listed for Renesas H8S/2472 and ATmega32.
  "uIP version 1.0 port to AVR with enc28j60 [s]till in early stages
  of development."
Maybe.  Have enough projects cooking, DJ?

Personally, I'm a fan of UDP, the "underused datagram protocol."  :-p

   - Larry


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