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How to realize IFFT use the VLFFT code supplied by TMS320C6678 lite ?



Hi:

    I want to realize the very large size IFFT. because there already is a very large size FFT in the lite,and both algorithm is nearly the same, I tried to realize IFFT by

modifying the FFT twiddle coefficients.

   there is two function to generate twiddle coefficients. I have  only modified the two function to generated the conconjugate cofficients for IFFT. But the result is

wrong.

  Is there anybody do the same work? How can I fix the program?