How compute 384-point FFT

Jarosław Wojtuń

Hi, all

I use in my work DSK6713 and CCS v3.1, and I want to compute 384-point FFT.
I added "fftw3.h" library, and when I compile *.c file, I don't have any errors,
but when I try rebuild my project I have 2 errors:

undefined                        first referenced
symbol                              in file
---------                        ----------------
_fftw_free                       C:\Documents and Settings\koder_DSP\koder\Debug\ZW_generator.obj
_fftw_execute                    C:\Documents and Settings\koder_DSP\koder\Debug\ZW_generator.obj
_fftw_destroy_plan               C:\Documents and Settings\koder_DSP\koder\Debug\ZW_generator.obj

What should I do to avoid this errors??

Thanks,
Jarek

over 15 years ago

0 TimHarron over 15 years ago

TI__Mastermind 18130 points

Undefined Symbol errors mean that you are missing the library/object file that actually contains this function. The header file only tells the compiler how the function is defined, but the actual function usually lies in a .lib file. With that said, I am not familiar with the fftw3.h header or those functions you mentioned. You might want to look at the C67x DSP Library instead.

0 Jarosław Wojtuń over 15 years ago in reply to TimHarron

Prodigy 80 points

Ok, but I want to compute 384-point FFT and this is not a power of 2.

Jarek

0 Andrew Kuksov over 15 years ago in reply to Jarosław Wojtuń

Prodigy 30 points

You can use 512-point FFT.

Some algorithms are described in this book:

Fast Algorithms for Digital Signal Processing

Richard E. Blahut

ISBN 0-201-10155-6

Processors

Processors forum

How compute 384-point FFT