代码搜索：FFt 有哪些应用？
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www.eeworm.com/read/169910/9833117
c fft_a.c
/*
fft_a.c - Radix 2 decimation in time FFT
Using C55x C intrinsics to perform in place FFT,
the output overwrite the input array
*/
#include "icomplex.h"
#include
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asm fft.asm
;
; fft.asm - Radix-2 complex FFT (for N=2^EXP points)
; Using table lookup method
;
; Prototype: void fft(complex *, int, complex *, int);
;
;
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mak fft.mak
# Generated by the VisualDSP++ IDDE
# Note: Any changes made to this Makefile will be lost the next time the
# matching project file is loaded into the IDDE. If you wish to preserve
# changes,
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ldf fft.ldf
/****************************************************************************
** $TITLE: FFT.LDF$
** FFT.LDF
** ---------
** Sets up the memory map for the FFT demo.
**
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c fft.c
/****************************************************************************
** $TITLE: FFT.C$
** FFT.C
** ---------
** Brings data in from the codec, and runs it through
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mak fft.mak
# Generated by the VisualDSP++ IDDE
# Note: Any changes made to this Makefile will be lost the next time the
# matching project file is loaded into the IDDE. If you wish to preserve
# changes,
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pcf fft.pcf
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c fft.c
#include
#include
#include
#define PI 3.14159265358979323846
struct COMPLEX
{
float re;
float im;
} cplx , * Hfield , * S , * R , * w;