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Like I said - I'm back with several problems. I've had some time today, so I did something with my program. I checked how works it with float input data. There weren't any problems. But I don't understand how program works, when I set FIXED_POINT = 32 (or 16). My output values are... hmmm... strange. They are completely incorrect. Maybe I have to multiply output array (after FFT) by some value?.
2009-12-11 21:00:39 UTC by emdegod
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I was sure, that my platform has dynamic memory allocation. And I was right, but... I found something about it and there is written that dynamic memory allocation isn't set as default. I had to set "heap_size" and now everything runs without problems...
Thanks a lot for your prompt response. And I'm sure, that I'll return here with another problem soon [:
2009-12-07 08:28:41 UTC by emdegod
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Does your platform have dynamic memory allocation?.
2009-12-06 22:16:25 UTC by mborg
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Hello all,
I'm completely new in FFT subject (and programming like this). I have to find and run FFT implementation on PIC32 (but first I should see it in MPLAB) . I've read a lot about FFT/DFT so far, I've tried some implementation and now I would like to run kissFFT. My input values are real, so I decided to use kiss_fftr. When I build program there isn't any errors. But when I run it...
2009-12-06 20:38:57 UTC by emdegod
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Just to test whether I am using the library correctly I created some simple data set using the function
y[i] = 10 * sin(2 * M_PI * (frequency / samplingrate) * i), so just a sinusoid. Using this data with KISS fftr (so using only real data) gives the expected results when the OpenMP parallellisation is NOT used.
Using OpenMP (and having applied the patch that was mentioned here in the forum...
2009-11-03 20:29:59 UTC by babcity
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mborg changed the public information on the Kiss FFT project.
2009-09-28 20:35:02 UTC by mborg
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mborg changed the public information on the Kiss FFT project.
2009-09-28 20:30:47 UTC by mborg
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mborg changed the public information on the Kiss FFT project.
2009-09-28 20:30:45 UTC by mborg
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mborg changed the public information on the Kiss FFT project.
2009-09-28 20:30:18 UTC by mborg
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mborg changed the public information on the Kiss FFT project.
2009-09-28 20:30:17 UTC by mborg
