The other day I ran across a few Atmel Raven[0] development boards that I'd
forgotten I had
(it never ceases to amaze the amount of random electronics I own and have
completely forgotten about)
. It got me thinking, now that
heavy lifting of porting
RIOT
to its first 8 bit micro and running
on the Arduino Mega with its ATmega2560 how small of an
micro
would it be possible to port RIOT to?
Each of the boards contains an ATmega1284P[1] is connected
via SPI
to
a
n AT86RF230 transceiver[2], with a second micro, an ATmega3290P[3] used to
drive the LCD and other peripherals.
A quick look at the data sheets seems to show
that
the
1284P
and its much larger cousin, the
2560
are quite similar.
1284P | 2560 | 3290P
--------------|------|-------
Flash: 128 | 256 | 32
SRAM: 16 | 8 | 2
MHz: 16 | 20 | 20
EEPROM: 4096 | 4096 | 1024
Max I/O: 86 | 32 | 69
The 3290 is a little on the small side but I wonder if someone could cram
RIOT in there. Is it possible to build RIOT without a networking stack; how
much could that reduce the memory footprint? What are RIOT's hardware
requirements? The homepage says the minimum RAM is about 1.5k and 5k of
ROM, are those numbers still accurate?
There's already a driver for for Atmel's AT86RF231 in the tree and while
the AT86RF230 on the Raven boards are nearly the same the 230 lacks a
couple minor features, namely a crypto processor and RNG. So, the RF link
would be wide open but for experimentation and learning sacrifices are
often necessary.
Anyways, I thought working on a port might be fun (I find enjoyment in
strange things) and wanted check you more knowledgeable folks to see if it
would be worth the effort or at least possible.
Thanks.
--adam
[0] http://www.atmel.com/tools/avrraven.aspx
[1] http://www.atmel.com/devices/ATMEGA1284P.aspx
[2] http://www.atmel.com/devices/AT86RF230.aspx
[3] http://www.atmel.com/devices/ATMEGA3290P.aspx
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