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Discussion Groups | TMS320C54x | Code Composer: symbol undefined "convol" (Dsplib.h was already imported)

Technical discussions about the TI C54x DSPs (including the c5401, c5402, c5402a, c5404, c5407, c5409, c5409a, c5410, c5410a, c5416, c5420, c5421, c5441, c549, c5470 and c5471).

  

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Code Composer: symbol undefined "convol" (Dsplib.h was already imported) - mydexterj - Aug 26 10:37:46 2006



I'm having a problem with using the convol function of the dsplib.h 
because every time I build my project in CCS it would note that the 
symbol convol is undefined. why is so?  Is there something wrong on 
how I called the convol function? Are my input parameters right? Are 
there any more problems that you can find in code?

Here is a portion of my codes where I called the convol function:

input-Int16
output-Int16
H-DATA

convol (&input, H, &output, 19, 19);

*Because I wish to filter (Low Pass Filter) my input signal using 
the convol function H holds the filter coefficients.
*Here are my filter coefficients for a low pass filter with a cut 
off frequency of 2kHz:

DATA H[19]={-0.033637, -0.023387, 0.026728, 0.050455, 0.000000, 
0.075683, -0.062366, 0.093549, 0.302731, 0.400000, 0.302731, 
0.093549, -0.062366, 0.075683, 0.000000, 0.050455, 0.026728, -
0.023387, -0.033637};

Best regards,

Dexter
m...@yahoo.com

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Re: Code Composer: symbol undefined "convol" (Dsplib.h was already imported) - Jeff Brower - Aug 27 21:41:45 2006

Dexter J-

> I'm having a problem with using the convol function of the dsplib.h
> because every time I build my project in CCS it would note that the
> symbol convol is undefined. why is so?  Is there something wrong on
> how I called the convol function? Are my input parameters right? Are
> there any more problems that you can find in code?

Have you listed dsplib.lib in your linker command (.cmd) file?

-Jeff

> Here is a portion of my codes where I called the convol function:
>
> input-Int16
> output-Int16
> H-DATA
>
> convol (&input, H, &output, 19, 19);
>
> *Because I wish to filter (Low Pass Filter) my input signal using
> the convol function H holds the filter coefficients.
> *Here are my filter coefficients for a low pass filter with a cut
> off frequency of 2kHz:
>
> DATA H[19]={-0.033637, -0.023387, 0.026728, 0.050455, 0.000000,
> 0.075683, -0.062366, 0.093549, 0.302731, 0.400000, 0.302731,
> 0.093549, -0.062366, 0.075683, 0.000000, 0.050455, 0.026728, -
> 0.023387, -0.033637};
>
> Best regards,
>
> Dexter
> m...@yahoo.com
>

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