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C28x Floating Point Unit Library

ale magnum
Prodigy 50 points

Other Parts Discussed in Thread: CONTROLSUITE

Hi,

I'm using the "C28x Floating Point Unit Library" from  sprc624.zip on my F28335.   I would like to know which type of FFT algorithm has been employed... "radix-2 decimation-in-time", "radix-2 decimation-in-frequency", or which other?   This because I'm trying to modify the classical equation of the Discrete Fourier Transform, but if I don't know the exact implemented algorithm, I can't do it.

And I have also an other question, does somebody know if are there some other libraries to evaluate the FFT, except this one?

 

Thank you for the help!   Any idea is well accepted.....

Alessandro

  • 0
    TI__Guru* 93800 points

    ale magnum said:
    I'm using the "C28x Floating Point Unit Library" from  sprc624.zip on my F28335.   I would like to know which type of FFT algorithm has been employed... "radix-2 decimation-in-time", "radix-2 decimation-in-frequency", or which other? 

    Alessandro,

    It was based on an IEEE paper by Sorensen and Heideman.  Real Valued Fast Fourier Transform Algorithms.  IEEE Transactions on Acoustics, Speech and Signal processing - June 2987

    There is an update to that library in www.ti.com/controlsuite which includes a complex FFT.

    Regards,

    Lori

  • 0
    Intellectual 810 points

    there is one under controlSUITE

  • 0 in reply to Yu Cai62050
    Prodigy 50 points

    Thanks a lot!

    You were very kind&usefull...

    Alessandro

  • 0 in reply to Lori Heustess
    Intellectual 255 points

    Hi there

    You know that the FFT is the Fourier Transform for the power of two sample sizes and TI provides the references Lib. for Real and Complex FFT Computing on their DSP Cores.

    BUT,  I'd like to compute the none power of two Sample sizes Fourier Transform. I meant the DFT.

    So, Is there any TI's library to compute the DFT values of none power of two sample sizes? or Can I use these FFT libraries to Compute my desire DFT under special Conditions!?

    I'm waiting to read any suggestions!!!!

    Thanks a lot