Dynamic FFT in VHDL

[Joe Bachi]

Hey everyone,
I've been trying to find a way to implement a dynamic FFT function that can be configured to take different numbers of inputs with the number being a multiple of twelve.
To this end, I am trying to use the Xilinx xfft v8 that does exactly what I need except that the number of inputs is a power of two.
Any suggestions on how to use this module to create one that takes multiples of twelve?
Thank you in advance

 

[JWHassler]

I believe that the Fast Fourier Transform is fast partially because it requires the input data to be a power-of-two in length.
Can you add zeros to your data to make it fit?

This has always helped me with DSP concepts