%?//?TI?File?$Revision:?/main/3?$
%?//?Checkin?$Date:?November?1?2010???13:05:07?$
%?//?=====================================================================================
%?//??This?software?is?licensed?for?use?with?Texas?Instruments?C28x
%?//??family?DSCs.??This?license?was?provided?to?you?prior?to?installing
%?//??the?software.??You?may?review?this?license?by?consulting?a?copy?of
%?//??the?agreement?in?the?doc?directory?of?this?library.
%?//?-------------------------------------------------------------------------------------
%?//??????????Copyright?（C）?2010-2011?Texas?Instruments?Incorporated.
%?//??????????????????????????All?Rights?Reserved.
%?//======================================================================================
%?//
%?//?	FILE:????FixedPointCFFT.m
%?//
%?//?	title:???DSP2833x?Device?Fixed?Point?Complex?FFT?Test?Program.???
%?//
%?//
%?//?	ASSUMPTIONS:
%?//
%?//???	This?matlab?code?is?reference?code?for?debugging?FixedPoint?DSP?library
%?//????function?CFFT32_brev?FFT32_calc?FFT32_init?FFT32_izero?FFT32_mag?
%?//????and?example?project?2833x_FixedPoint_CFFT.?
%?//
%?//???
%?//????Watch?Variables:
%?//
%?//??????x_raw_sig?????????Input?signal?（float）
%?//??????RxIx				Bit-revesed?real?and?imaginary?part?of?signal
%?//????????????????????????（Q31）
%?//??????x_out_2nd?????????2nd?Stage?complex?CFFT?result
%?//??????X?????????????????Stage?3?and?up?result?（Q31）
%?//??????Magnitude_Fixed???Spectrum?magnitude?（Q31）
%?//??????fft_float?????????Normalized?floating?fft?result?represented?as?（Q31）?
%?//
%?//######################################################################################
%?//?$TI?Release:?C28x?Fixed-Point?DSP?Library?v1.10?$
%?//?$Release?Date:?November?1?2011?$
%?//######################################################################################

clear?all
close?all

disp（‘==============================================================‘）;
disp（‘input?signal?is?stored?as?Q31?format‘）;
disp（‘result?is?the?same?as?matlab?function?fft（x）/N?as?Q31?format‘）;
disp（‘==============================================================‘）;
disp（‘this?is?Matlab?version?of?C28x?Fixed?PointCFFT?code‘）;
disp（‘The?result?is?stored?in?array?X‘）;
disp（‘The?signal?is?stored?in?array?x_raw_sig‘）;
disp（‘fft_float?stored?the?fft（x_raw_sig）?in?Q31?format‘）;
disp（‘Magnitude_Fixed?in?Q31?format‘）;
disp（‘==============================================================‘）;

RadStep?=?0.1963495408494;

stages=input（‘Please?enter?stages?（>=3）?=‘）;
N=2^stages;
halfSize=N-1;

Rad=[0:RadStep:（halfSize）*RadStep];

even_idx=0:halfSize;
odd_idx=even_idx+1;

CFFTinBuf1=zeros（1N）;

Rx=sin（Rad）+cos（Rad*2.3567）;
Ix=（cos（Rad*8.345）?+?sin（Rad*5.789））;

x=Rx+j*Ix;
x_raw_sig=x/2;

fft_float=2^31*fft（x/2）/N;

%bit?reverse?algorithm
for?i=1:N
????dr（i）?=?bin2dec（fliplr（dec2bin（i-1stages）））+1;
end

dr_1=dr-1;
Rx=2^31*Rx（dr）/2;
Ix=2^31*Ix（dr）/2;

%stage?1?and?2
for?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????4967??2012-06-26?14:46??workspace\dsp\FixedPointLib\cmd\test_fixed_point_fft.cmd

?????文件?????576300??2012-06-26?14:46??workspace\dsp\FixedPointLib\doc\C28x_Fixed_Point_Library_v1_01.pdf

?????文件?????122772??2012-06-26?14:46??workspace\dsp\FixedPointLib\doc\eziir_matlab.pdf

?????文件??????10686??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\.cdtbuild

?????文件??????10686??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\.cdtbuild_initial

?????文件????????677??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\.cdtproject

?????文件??????18707??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\.cproject

?????文件???????3337??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\.project

?????文件???????2779??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\.project_initial

?????文件????????104??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\macros.ini_initial

?????文件?????????62??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\.settings\org.eclipse.cdt.codan.core.prefs

?????文件???????4954??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\cmd\test_fixed_point_fft.cmd

?????文件???????8663??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\matlab\FixedPointCFFT.m

?????文件???????4578??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_CFFT\source\2833x_FixedPoint_CFFT.c

?????文件??????10694??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\.cdtbuild

?????文件??????10694??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\.cdtbuild_initial

?????文件????????677??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\.cdtproject

?????文件??????18716??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\.cproject

?????文件???????3338??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\.project

?????文件???????2780??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\.project_initial

?????文件????????104??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\macros.ini_initial

?????文件?????????62??2015-02-04?11:38??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\.settings\org.eclipse.cdt.codan.core.prefs

?????文件???????7732??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\cmd\28335_RAM_lnk.cmd

?????文件???????2964??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\matlab\FixedPointFIR16.m

?????文件?????103100??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\readme\fir16?header?file?generation\fir1.JPG

?????文件?????100022??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\readme\fir16?header?file?generation\fir2.JPG

?????文件??????92362??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\readme\fir16?header?file?generation\fir3.JPG

?????文件?????130524??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\readme\fir16?header?file?generation\fir4.JPG

?????文件???????1521??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\readme\fir16?header?file?generation\Readme.txt

?????文件???????6447??2012-06-26?14:46??workspace\dsp\FixedPointLib\examples_ccsv4\2833x_FixedPoint_FIR16\source\2833x_FixedPoint_FIR16.c

............此處省略9741個文件信息