cf_fft

Hi guys,

a wrote a gouple of days ago a question about the cf_fft from
opencores.org.
Anyway i want to thank Bert because he helped me( my mistake wasthat i
made a error by changig the design from numeric package to arith
package.
Now the system is running, but as i said before its "only" a part of
the overall system and i got no time from my supervisor to design my
own fft ( i wish i had).
My problem is that i need to know the value of each single bit at the
in oroutput(sign 2^?), i tried it with sinewaves( to find real and im
parts of the frequency
bins),i tried also some dc values because i thought their would be a
zero frequency bin. Farther i tried noise and combinations of those
signals, but i was not able to find the specific characters of each
signal.
I think it's only a trivial thing that i don't see, but it's not my
design and it's designed with a generation tool (8000 lines)whitch
makes it impossible to read the code.

Greetings Marco

 

[Neo]

marco,
I think its quite impossible to help you on this. The core is from
opencores and all the details will be implementation specific. So its
useless to post here, instead try posting in opencores forums.