FFT code example

seyd khazraei

I am going to implement 128 point FFt on control stick kit TI28069 using code composer studio v4 . For the sake of simplicity I copied a part of the code example SineFIRFFT32-Main.c from controlsuit package. As far as I know the only header file I need to add other than default headers is FPU.h which I added so for headers files section, I have :

#include"PeripheralHeaderIncludes.h"

#include"F2806x_EPwm_defines.h" // useful defines for initialization

#include"F2806x_DefaultISR.h"

#include"FPU.h"

#include <math.h>

However, when I run my codes I get the following error

undefined first referenced

symbol in file

--------- ----------------

_RFFT_f32 ./TriggeredADC-Main.obj

_RFFT_f32_mag ./TriggeredADC-Main.obj

_RFFT_f32_sincostable ./TriggeredADC-Main.obj

error: unresolved symbols remain

error: errors encountered during linking; "TriggeredADC.out" not built

Based on my past experience it means some library related to FFT has not been added or defined correctly. So is there any other library I have to add? Can you help me regarding this issue?

Thanks

seyed

over 13 years ago

0 Vishal_Coelho over 13 years ago

TI__Mastermind 20850 points

Hi Seyed,

It looks like the library(.lib) wasnt pulled in. IF you look at the properties of the example project: C2000 Linker-> File Search Path You should find the name of the library "*.lib" in the upper entry box and its relative path in the lower box. If you have moved the example project from its original default place you will need to replace this relative path with the absolute path of the location of the .lib file.

0 seyd khazraei over 13 years ago in reply to Vishal_Coelho

Prodigy 145 points

Thanks vishal. I did it and it worked for me.

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FFT code example