FFT need help

Hello,

Thanks for this document, but I have still problems :p

For the clock it's ok, I understand what it is. But then ...

Reset_n : it's for reset the FFT before get a new signal ?

I don't understand what are the sink_*** input (or output maybe). What is their utility ?

And for the source, how I must link it to the FFT ? I think I have to use source_real and source_imag but I don't understand the difference between these input.

The source_valid and source_ready, I think it's ok.

So if someone can explain me what are the inputs I have to use to get my signal in the FFT, and the utility of sink_*** I/O, it will be very good :D

Sorry if it's explain in the pdf, but I don't understand everything.