Have you search in opencores.org? Found this one: https://opencores.org/project,cfft. Perhaps it can be used as a basis of your design by studying the code.
i have done with 8 point fft...thanks.
Now i want to write verilog code for 2 dimensional FFT which needs defining a 2 dimensional matrix and every element in this matrix is an array of 15 ...can anyone tell me how to write data in matrix..one way is defining an array of (no of rows* no of columns)..is der any other method?
and also matrix transformation is neccessary here...pls help me