FFT code

I appreciate the help on my previous FFT posting. I thought I'd mention the existance of some code at http://www.archelon.com/fft.html . I'm not sure if this would be appropriate for my microcontroller...
FFT code

I'm looking for C code to do an FFT on a Cygnal C8051. Has anyone done this?
Filters !

This is NON-Keil, but part of our "embedded" world. I found this Texas Instruments website for filters that is kind of cool... www-k.ext.ti.com/.../webcgi.exe(26717),new I guess, you'll have...
High-pass filter [code]

Hello, I'm a student of Technical University. I really need a code for high-pass filter to my lesson. I have been searching in the whole net, but i didn't find. It would be great if u could help. ...