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Discussion Groups | Analog Devices DSPs
Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).
Search Results for "fft"
FFT cycles on BF-533/535
john_baker_s - Mar 6 2004
Hi all,
I downloaded some FFT routines from ADI web site for the Blackfin.
The zip file contains radix-4 and radix-2 complex FFT implemented
(together with oth... 
Basic Question
Mahendra Reddy - Jun 27 2001
I recently purchased EZ-Lite 21061 evealuation kit and wants try few FFT
programs. I have the integer samples from ADC of the board which I want to
use as i/p to th... Real Symmetric FFT [3 Articles]
andor_bariska - Dec 9 2003
Hi friends,
the source code for the Real FFT can be downloaded from ADI. It
implements a real N-point FFT using a N/2-point complex FFT, plus
some signal reass... Re: AW: Real Symmetric FFT
Jeff Brower - Dec 9 2003
Andor-
> > > the source code for the Real FFT can be downloaded from ADI. It
> > > implements a real N-point FFT using a N/2-point complex FFT, plus
> > > some... Multiprocessor FFT prblm [2 Articles]
Syed Moinuddin - Apr 11 2005
Dear All,
am trying to do fft on ADSP TS201S Ezkit. The code provided by
Analog devices is as follows:
Processor B is in infinite loop (doing nothing setting onl... FFT
deckers_dominique - Oct 31 2005
Hello everybody,
I'm trying to do an FFT with the ADSP2181 code from Analog (assembler)
in the simulator (visualdsp++3.5). I importe sampling from matlab (sum
of thre... AW: Inverse FFT of real signals
Bernhard Holzmayer - Sep 15 2004
> -----Ursprüngliche Nachricht-----
> Von: soundbyfabrizio [SMTP:]
> Gesendet am: Mittwoch, 15. September 2004 11:29
> An:
> Betreff: [adsp] Inverse FFT of rea... Algorithm Real FFT/IFFT
Dmitry - Dec 8 1999
Hi All.
I use ADSP-21xx for audio applications. I must to transform ADC data
to the power spectrum, to modify the spectrum and to trasform it back.
Therefore,... inverse FFT
bojuchen2000 - Aug 10 2004
Hi,
I use DIT method to implement FFT.
But while I use the same code to execute inverse FFT, anything else I
should be careful out there?
In the Analog Devic... noise from fft() in VDSP library [2 Articles]
prasanth rajagopal - Dec 8 2005
hi, the fft() and ifft() in library of the VDSP gives values which are 4 times scaled..Now if I want to use this for an audio algorithm, I am getting large noises.. Is there... Inverse FFT of real signals [2 Articles]
soundbyfabrizio - Sep 15 2004
Hi all,
I saw the ADSP-21062_Real_FFT_rad-2.zip for a real FFT implementation
on a 21062 processor.
I didn't find anything about the inverse FFT algorithm.
... c routine for FFT and IFFT
P.Kranthi Reddy - Oct 15 2001
Hi,
i am working on adsp 2192 processor and new to it.
i need a 'c'language implementation of COMPLEX FFT
and COMPLEX IFFT routines for a 16 bit fixed point
pro... AW: optimised autocorrelation
Jens Michaelsen - Sep 12 2003
Right, the FFT routines are quite good.
We process 1024 samples like this:
- Acor();
- FFT();
- search for maximum();
- ...
- done
There is good sig... FFT analysis and save this result in Harddisk [2 Articles]
muratmicrochip - May 14 2005
For ADSP21161 EZ-KitLite,i must get samples from ADCand to make a
FFT analysis and save this result in Harddisk or RAM of DSP.(for
recognizing voices)
i am a student ... Urgent (FFT on Blackfin)
khalil - May 30 2005
Hello,
I need to perform 512 fft on BF533, I tried to use the
"cfft_fr16" C function from the ADSP library , but I
didn't get a good result. I used "twidfftrad2_fr16" to ... Re: AW: Projects with EZ-KIT Lite
Andor Bariska - Feb 12 2000
> -----Ursprüngliche Nachricht-----
> Von: [mailto:]
> Gesendet am: Freitag, 11. Februar 2000 18:21
> An:
> Betreff: [adsp] Re: Projects with EZ-KIT Lite ... fft bit reversing for N prime--
duncwood - Jul 27 2007
I am using the tigersharc,
Does any one know how to bit reverse using a fft with prime factor not
a multiple of 16?
I can't seem to get this to work on the tiger--
thank... permanent write in cache [2 Articles]
rahi...@yahoo.com - Apr 14 2005
dear all,
plz somebody solve my problem, (processor TS201 tigersharc)
problem description :
i have a matrix of size 256 * 512. i want to perform 2D FFT on the mat... Inverse FFT for real input on Blackfin [2 Articles]
john_baker_s - Aug 1 2003
Hello all,
I see that the DSP library has two functions for forward FFT of real
input, namely rfft_fr16 and rfftrad4_fr16. Those two take fract16
input and giv... AW: AW: optimised autocorrelation [2 Articles]
Jens Michaelsen - Sep 13 2003
I must be somewhat wrong,
don't get the same results
if I do A or B or C:
Variant A:
b=Acor(a)
x=FFT(b);
Variant B:
b=FFT(a);
y=RMS(b);
Va... FFT problem
ivan...@hotmail.com - Aug 18 2008
Hi,
I am trying to call an FFT library function from assembly code. I am working with ADSP 21396 processor (SHARC). I picked _cfftn_nonSIMD. I've tried using the SIMD version bu... AW: AW: Reg...guitar tuner design...
Bernhard Holzmayer - Oct 6 2004
> -----Ursprüngliche Nachricht-----
> Von: Jon Harris [SMTP:]
> Gesendet am: Dienstag, 5. Oktober 2004 21:07
> An: Bernhard Holzmayer; 'ayyam perumal';
> Be... Regarding FFT [3 Articles]
Prashanth Bhushan - Jan 15 2002
Hi,
I was going through the FFT code hosted by Analog Devices where they
have benchmarked a 128 point real FFT to take just 1160 cycles on ADSP
21062 !
Th... fft function
Kerekes Sándor - Jan 8 2004
Dear Dr. Mike,
> Copy a program from the ADI web site and feed it fixed point data.
> Not integer data. Scale your data so the fft will work correctly
> - that... fft adsp2181 visualdsp++3.0
my_mehdi1 - Oct 29 2003
Hi,
I am looking for a FFT program running with the ADSP2181 on Visualdsp
simulator environment.
Do you have a such code example?
Thank you in advance.
... FFT implementation in SHARC
Scott - Feb 20 2001
Dear All:
My application is for radar data processing, the range cells to be
processed are 512 and the FFT size is 256.
Does anyone can tell me which SHARC proces... FFT link [2 Articles]
Girish - Jan 16 2004
hi all ,
where can i get N point FFT assembly code for
ADSP-2181 processor.PLZ get me the exact FFT link of
anolog devices.
bye
Girish
__________________... Problem in VDSP Project [3 Articles]
talhahassankhan - Sep 16 2004
Assalam-0-Alaikum
i'm using ADSP-2188M & VDSP3.0. I've made a proj in VC & added in
VDSP. I've changed Files extensions from .cpp to .c.
Following r the errors in... FFT result problem [2 Articles]
Maria Mount - Jun 2 2003
Hello,
I have Run 32 bit 1024 point Complex FFT on a Tiger Sharc. The DSP runs
fft excalty as given in application note. Now i want to plot these results in
real ... FFT BY C/ASSEMBLY??. [2 Articles]
prasanth rajagopal - Dec 13 2005
HI . I have an fft function in c program, which is higly accurate. I would like your opinion on whether I should implement it in assembly or take the c as it is. My s... rfft_fract16 clarification
nhpdxr - Nov 18 2005
A simple question, I hope, about the Blackfin BF533 function
rfft_fr16(in[], t[], out[], w[], wst, n, block_exponent, scale_method)
Input is an array of fract16, outpu... FFT for 2191
- Nov 20 2001
Hi all,
Has anyone tried using the FFTs supplied with ADI's DSP library?
The documentation ( e.g. cfft_fr16() )lacks explanation on buffer
sizes, and looking t... FFT Routines in 21xx library
nagaraj cs - Dec 19 2000
Hi all,
I am using 21xx rel 6.1 tools.
When I call FFT routine provided by inbuilt
library(for eg fft64), i see that twiddle factors are
initialized in lower wo... FFT on Hammerhead 21160 (Evaluation board) [2 Articles]
- Jun 12 2001
Hi
I'm presently trying to get the radix-4 fft algo to work on my 21160
processor. I've downloaded the sourcecode from analog device, but the
results I get is ... Limited Frequency FFT - EZ Kit Lite 2181
- Oct 5 2001
I've used the EZ Kit Lite 2181 to record an audio sample
(rec_16.dsp), and then search for audio tones within the sample
(dit_main.dsp). This works somewhat well, a... Help needed in adi_dsp
niranjan reddy podduturi - May 9 2004
Hello friends,
good day
iam working on ADI_DSP tool
thats giving me somany problems
when following commanfd given in commandprompt:
>f:asm21 fft.dsp
... Testing FFT [2 Articles]
Girish - Jul 2 2004
Hello all,
How to test FFT for a realtime signal on ADSP-2181
processors ?
I also want to know is it possible to display the
FFT of real time signal on LC... Complex FFT with circular buffer
nikinet - Oct 8 2001
Hallo,
I have a following question, I want to use circular buffer
with the standard complex FFT C runtime for ADSP-21160. Can
you gibe ne some example, how can... Re: VDSP++(TS101 FFT implementation)
Jaime Andres Aranguren Cardona - Jan 17 2005
Hello,
--- rama raju <> wrote:
> I am having some doubts regarding FFT implementation
> in TS101. TS101 is having Complex data format .i.e
> in 32-bit 0-1... FFT calculation
girish tatti - Dec 19 2003
hello sir,
I have doubt with FFT. ADSP-2181 supports FFT
libraray.
I performed 8-point FFT on a series i am not getting
the exact results
Here is the code
...