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Today's Topics:

  1. Re: FFT(Fast Fourier Transform) in TinyOS (Michael Schippling)
  2. which version of Tinyos is this? (wasif masood)
  3. Re: acoustic recording source code (Michael Schippling)


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Message: 1
Date: Thu, 30 Sep 2010 10:39:59 -0600
From: Michael Schippling <schip <at> santafe.edu>
Subject: Re: [Tinyos-help] FFT(Fast Fourier Transform) in TinyOS
To: Christian To <xtian_1028 <at> yahoo.com>
Cc: tinyos-help <at> millennium.berkeley.edu
Message-ID: <4CA4BD5F.6040709 <at> santafe.edu>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I don't know of any official code but I have a little
C demo I made for myself years ago here:
   http://www.etantdonnes.com/DATA/FFT.zip

The problem is that the micro-controllers have very
little RAM and no math support beyond an integer
multiply instruction. You can use the above code
to do fixed point calculations which will alleviate
the problems but it's not ideal. It would be better
to do calculations at the host node.

MS


Christian To wrote:
> Hello!
>
> I am an undergraduate student trying to build a wireless sensor network
> that monitors vibration from civil structures.
>
> I was wondering if TinyOS has an implementation of FFT (Fast Fourier
> Transform) so that I can do modal analysis.
>
> If there is so, can anyone please tell me?
>
> Thank You!
>
> - Christian To
>
>
>
> ------------------------------------------------------------------------
>
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> Tinyos-help mailing list
> Tinyos-help <at> millennium.berkeley.edu
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------------------------------

Message: 2
Date: Thu, 30 Sep 2010 18:44:11 +0200
From: wasif masood <rwmasood <at> gmail.com>
Subject: [Tinyos-help] which version of Tinyos is this?
To: tinyos forum <tinyos-help <at> millennium.berkeley.edu>
Message-ID:
       <AANLkTim48Dgi4XB5ihE5T_tJRR7URKSpcUFcBG_pFhGC <at> mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

can anyone please tell me which version of tinyos is at this CVS address:

cvs -z3 -d:pserver:anonymous <at> tinyos.cvs.sourceforge.net:/cvsroot/tinyos
checkout


available at:
http://docs.tinyos.net/index.php/TinyOS_CVS_access


is this 2.1.1 or what? because lately we are having problem running tests on
Indriya test bed because of this different versions of tinyos
--
Wasif Masood
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Message: 3
Date: Thu, 30 Sep 2010 10:44:53 -0600
From: Michael Schippling <schip <at> santafe.edu>
Subject: Re: [Tinyos-help] acoustic recording source code
To: =?x-gbk?Q?=B9=F9=C1=E8=B3=AC?= <glc216722 <at> 163.com>
Cc: Tinyos-help <tinyos-help <at> millennium.berkeley.edu>
Message-ID: <4CA4BE85.6000809 <at> santafe.edu>
Content-Type: text/plain; charset=x-gbk; format=flowed

search this list for  keywords:
audio, microphone, FastAdc

and have a look at these links:
> Hi Omar,
>
> Use this library (works only for IRIS so far)
>
> http://szte-wsn.cvs.sourceforge.net/viewvc/szte-wsn/tinyos/tos/lib/Atm128FastAdc/
>
> and this sample application to sample the mic at 9 KHz.
>
> http://szte-wsn.cvs.sourceforge.net/viewvc/szte-wsn/tinyos/apps/MicReadStreamTest/
>
> Miklos


?????? wrote:
> Hi all,
>        I'm a freshman of tinyos , my boss want me to record acoustic
> sounds over a sensor network. However, I don't really know how to use
> Mic to record sounds, so who can send me a source code of acoustic
> recording ,and a piece of cooperative recording code would be better.
> Thank you very much!
>
>
> ------------------------------------------------------------------------
> ????????????????????????????24??????????????
> <http://yxp.163.com/photo/ep.html?sss=fromyx0911>
>
> ------------------------------------------------------------------------
> ????????????????????????????24??????????????
> <http://yxp.163.com/photo/ep.html?sss=fromyx0911>
>
>
> ------------------------------------------------------------------------
>
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> Tinyos-help mailing list
> Tinyos-help <at> millennium.berkeley.edu
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------------------------------

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End of Tinyos-help Digest, Vol 89, Issue 69
*******************************************

Hi all,
       Can a component be used mutiple times in an single file ?
       For example, component ActiveMessageC as AMC1;
                             component ActiveMessageC as AMC2;
       Is that correct or false ？


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