From: sade made (sademade_at_yahoo.com)
Date: 2002-02-11 00:14:34
> Nah, that would be boring. But seriously the idea
> here is continuous monitoring/recording, results to
> be looked at later.
Well, post mortem analysis often provides useful
educational info indeed. Something for the children
and grand-kids to remember one from in addition to
that weird propeller in the hat in the family pic.
Or,Say, take 100 X+Dex+PhenFen and see the profiling
the EEG records wile the KY Chicken gets fried up ...
>Danish TV station TV2 Zulu
( are you sure it was not called Zilu, Pulu, or
Kapten Kyrkatomten? )
> Raketfart (which translates to "space travel") in
> Copenhnagen Denmark last year (weekly primetime
> series).
Well, aslong as it was not "GammalFart" which you
know also how to translate I suspect.
> Sure you can go full custom and make something very
> small and low-power, BUT there is avantages to going
> with a linux-based platform, primarily you have lots
> of existing software you can use.
The DSP56K comes with over 1 million lines of
source/library code for real-time computing, ad/da,
communications, and more, that do not necessarily
even exist for desktop style OS's like Linux, and
the Linux RT, or the RTAI, do not yet seem to have
over 1 meg line of useful real-time timer/ad/da
etc routines contributed, actually, very little
that there is on either sites, when I checked last
time, and RT linxu already has gone commercial more
or less, and RTAI might, so, I rather use the free
to use stuff that comes with Moto Embedded SDK and
the compile the crap with CodeWarrior, and, the
good point for me is that the code is regular
C and very real-time oriented to provide maximum
performance, with in-line assembler used in areas
where really lot speed is needed.
> My 200hz x86 boards
> are 4x6 inches, you can now get the same in 4x4
> inches.
I can get helluva lot with the 2 smallest case
moto DSP56k's into 2x2 cards, and if necessary,
with the smallest one even close to 1x1 if I use
something like hirose denki smallest connectors,
and minimize unnecessary connections, and use
the internal A/D + Codec, or put outside converter
like the ADS1252 or ADS1254 or the ADS1211 with
SPI. And can get quite nice real time performance
with the parallel MAC instructions, for very low
price with flash on cpu.
> Even smaller, though slower, are DIMM-PC modules and
> there are also DIMM sized modules running StrongArm
> called Trizeps. The point of my mobile systems are
> not to be specific-function devices, they are
> intended to replace desktops and laptops, and they
> do.
One could easily make a smaller than dimm-module with
the 2 smallest case DSP56kF8xx's. 1x1 should be very
possible if necessary, with right connectors. There
is also uC/OS that is small enough that it would run
nicely in the 32k of the flash of the moto dsp, and
the source code can be gotten by purchasing Mr
LaCrosse's book, or use freely downloadable RTEMS
that also fits small footprints much better than
any of the current Linuxes, and bring cost down
massively, I mean the whole deal could be made for
$40, including the DSPCPU, optional A/D, amps, and
some kind of display. That is not bad for total
stand-alone deal on a 1x2 or smaller board max, with
cost of $40. Not easy to beat with many other choices,
and for automobile applications, the DSP56k has an
internal CAN bus in addition to uart and spi, which
makes it further applicable to the mobile application
and monitoring, it could be built in a car ( or
sux6000
if you like ) or installed as an option existing
CAN-based mobile network. It could be a safety device
that monitors the driver in real-time, and tells to
give up, if the driver is drunk or wasted or got
senility attack or got sleepy etc.
> Agreed. I'm not saying that this embedded stuff
> should be part of this project. All I am saying
> is that my goal is to replace the "PC" part of
> OpenEEG with an embedded PC (initially) then
> eventually move to StrongArm for power reasons.
I would support your goal, as it makes sense, and
also my goal makes sense, as it is one for reducing
the cost and size and complexity to minimum, and
sometimes, one has to forget OS and use 1meg+ line
source real-time libraries, or apply small RT OS
with small footpring and designed from bottom up
to RT computing while free and clearn licensing
wise.
I think both goals should be supportable, as they
have different niches to fill.
> Lots of mobile computing info on my web site:
> http://home.earthlink.net/~wearable/
Yep, checked it out before ever wrote anything
to this list the first time. Very good info
page you have, and for those who are into the
wearable standalone computing a good site.
I personally like using some decent pocket-PC where
one can flash Either CE/PC2002 or Linux as on OS
on those, with existing Linux, so one does not have
to fool around with writing that part, and then
one could use something like that as the multi-
application personal platform, then again, it is
more costly, larger, than my tailoring goal, yet
it is more flexible as well, and can run larger
software, so, my goal could be considered more
as a "module" that can be connected to existing
communication network, would it be UART or CAN,
USB or later, perhaps TCP/IP, an embedded verytinyEEG
that could be hooked either to the serial port of
a pda/pocket PC or USB port of the same, or
can network of a SUX6000, or, Internet, and for
that, Moto seems to offer some nice modem and tcp
code, which is not bad, and there are such also
to be found in source for the small footpring OSes,
and as I'd rather be able to understand ALL software
that runs on something I make, I rather go with the
VERY SMALL footpring ones, as I could never know
every single line of Linux whether there is a
backdoor, bug or something, while it is doable
with something as small as for example Siemens
167RTX OS, that takes as little as 3-4 k flash
space, and yet provides pre-emptive multi-tasking
with FAST task switches, something like that,
small, efficient, beatiful, and powerful, yet
not brain-damaged, is what I like, but, then,
I could not have the great graphics programs
etc bull that the PDA can offer, for that, I would
connect the little module to Internet, PDA, Car
and use it's computer that MAY have Linux or something
else, and that is fine. I want to limit my own
capacities to areas I am confident and competent
with, and leave the desktoppish dimension of this
project to those who are better topping the desk
than I am, I seem to have to do it under the
table or have "em"bedded.
Anyways, Doug, I welcome your more positive attitude
and as I sometimes tend to mirror the attitudes of a
list and it's inviduals, from me,
good gets good, bad gets bad, the simple law of
the jungle of the cartoon hero Black Mask or
whatever the funny Scandinavian cookie cartoon
told the kids 3+ decades ago. BTW, the movie
did not do very well, even though the dude was
hilarious looking. Neither did Pippi LongsTrumpet
either, but that is another story ... Did you like
your little side-trip to Roskilde when you were
visiting the channel ZuluZilu in Copenhagen ?
Regards, Sade M.
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This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:38 BST