代码搜索：如何学习 FFt？
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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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cpp fft.cpp
#include "math.h"
//#include "stdio.h"
#include "fft.h"
//#include "qam64.h"
void ChangeOrder (Int16 *changeDataIn, Int16 length, Int16 pow_4)
{
Int16 i, j, k;
Int16 temp1, temp2;
Int16
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h fft.h
#include "typedef.h"
extern Int16 fftWeights[];
//extern
void ChangeOrder(Int16 *changeDataIn, Int16 length, Int16 N);
void fft (Int16 *pFftIn ,
Uint16 fftSize,
Int16 *pWeight
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c fft.c
#include
#include
#include
#include "var.h"
void StartFFT()
{
XBYTE[0xbfff]=1;
XBYTE[0xbfff]=0;
}
bit IsFFTFin()
{
if( XBYTE[0xbff]==1)
return 1;
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lst fft.lst
C51 COMPILER V8.02 FFT 09/05/2007 11:52:44 PAGE 1
C51 COMPILER V8.02, COMPILATION OF MODULE FFT
OBJECT MODULE PLACED IN fft
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obj fft.obj
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h fft.h
void Simple();
void SendtoFpga();
void StartFFT();
void GetFFT();
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c fft.c
#include "DSP281x_Device.h" // DSP281x Headerfile Include File
#include "DSP281x_Examples.h" // DSP281x Examples Include File
#include "f2812a.h"
#include"math.h"
#define PI 3.1415926
#defi
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