[sdiy] FFT on dsPIC

[Richie Burnett]

Hi all,

Has as anyone managed to get an FFT to work on dsPIC?

I'm programming in Assembly and have been looking for a pre-written FFT 
routine.

Manufacturers of other DSPs I've worked on have always provided 
highly-optimised library functions to call for functions like FFTs, but I'm 
struggling to find likewise for the dsPIC.

Microchip's "dsPIC Language Tools Libraries" document says...

"2.1 INTRODUCTION. The DSP Library provides a set of digital signal 
processing operations to a program targeted for execution on a dsPIC30F 
digital signal controller (DSC). The library has been designed to provide 
you, the C software developer, with efficient implementation of the most 
common signal processing functions. In total, 49 functions are supported by 
the DSP Library. A primary goal of the library is to minimize the execution 
time of each function. To achieve this goal, the DSP Library is 
predominantly written in optimized assembly language. By using the DSP 
Library, you can realize significant gains in execution speed over 
equivalent code written in ANSI C. Additionally, since the DSP Library has 
been rigorously tested, using the DSP Library will allow you to shorten your 
application development time."

Fantastic!  That's what I want.  And it then goes on to say...

"2.1.1 Assembly Code Applications.  A free version of this library and its 
associated header file is available from the Microchip web site. Source code 
is included."

...but, I can't find it anywhere! :-(   Maybe because Microchip have 
reorganised their website after the Atmel merger (>.<)

Does anyone have the illusive "FFT.asm" or "FFT.s" file containing the 
"FFTComplexIP" function lurking on their hard drive?

Any help / pointers very gratefully received!

Many thanks,

-Richie,