Try this
- From: "TheDoc" <thedoc@xxxxxxxxxxxxxxxx>
- Date: Sun, 29 Jul 2007 10:30:11 -0500
From: "Jay Maynard" <jaymaynard@xxxxxxxxx>
Subject: Which microcontroller do I need?
Date: Saturday, July 28, 2007 10:19 AM
I'm trying to select a microcontroller for an application, and having
little luck sifting through the masses of information on the web.
I need:
1) Two async serial ports, capable of running at 9600 BPS. I'd greatly
prefer this to be in hardware; bit-banging is too much work, and hard
to do in realtime with other things going on. RS-232 drivers are not
necessary, but the ability to accept inverted CMOS (1=0V, 0=+2.6V)
levels is.
2) Ethernet, with TCP/IP stack provided. A web server isn't necessary,
but I'll use it if it's there.
3) Reasonably inexpensive prototype board. This is a ham radio
project, and I intend to publish it so that other hams can use it.
4) The ability to develop on Mac OS X, or at least Linux. I refuse to
run Windows unless there is absolutely no other option.
5) Open source development tools. I can deal with C, and assembler
doesn't faze me; I'd rather not do BASIC.
I don't need:
1) Bells and whistles on the prototype board. No LCD displays,
buttons, optoisolators, or any other such.
2) A big, hairy realtime OS. The application's job is to monitor
traffic going from one serial port to another, interpret it, and make
the contents available via Ethernet, and to accept commands and insert
them in the serial datastream going the other way. A nice, small
kernel, OTOH, would probably be useful.
I don't care about:
1) Architecture wars. I have no investment in any microcontroller
architecture, so I'm free to select the best (or only) one to do the
job.
2) I/O pins beyond Ethernet and async.
3) Programming methods, as long as I can plug it into my Mac. This
means USB, practically speaking, although an Ethernet-bootstrappable
prototype board will also work.
4) Whether programming is accomplished on the prototype board or via a
separate programmer.
Thanks in advance for any help you can provide.
Try a look at.. www.olimex.com "easyweb3"
or perhaps the ARM module LPC-E2124
.
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