文件列表:

CFFT (C) (0, 2006-09-30)
CFFT (C)\cfft.dpj (3031, 2006-05-26)
CFFT (C)\in.dat (575, 2006-05-26)
CFFT (C)\out.ans (1544, 2006-05-26)
CFFT (C)\test_cfft.c (1194, 2006-05-26)

**************************************************************************** ADSP-BF535 Complex FFT Demo Analog Devices, Inc. DSP Division Three Technology Way P.O. Box 9106 Norwood, MA 02062 Date Created: 3/11/02 This directory contains example ADSP-BF535 program that implements a complex FFT routine. Files contained in this directory: readme.txt this file cfft.dpj VisualDSP++ 4.5 project file test_cfft.c C source file for the fft routine in.dat example input data file out.ans example output data file _________________________________________________________________ CONTENTS I. FUNCTION/ALGORITHM DESCRIPTION II. IMPLEMENTATION DESCRIPTION III. OPERATION DESCRIPTION IV. DESCRIPTION OF INPUT DATA I. FUNCTION/ALGORITHM DESCRIPTION The project cfft.dpj contains the implementation of a complex FFT algorithm. II. IMPLEMENTATION DESCRIPTION The Blackfin DSP library routine is used to apply the FIR filter. The twiddle factors are generated by another DSP library routine. III. OPERATION DESCRIPTION 1. Open the VDSP project cfft.dpj in the IDE (Integrated Development Environment). 2. Under 'Session'->'Select Session', select the ADSP-BF535 ADSP-BLACKFIN Family Platform session. 3. Under the 'Project' tab, select 'Build Project'. This will automatically load the executable. 4. Select 'Run' from the 'Debug' tab on the menu bar. 5. The demo routine performs a ***-point FFT. Please be patient, because the simulator must simulate every hardware memory access. The output will be written to the file "out.ans" and can be found under the Debug folder in the project directory. The file "out.ans" is provided for comparison and is the FFT output for the example input data, "in.dat". Note that the FFT output data is scaled to be between 0 and 1. Also note that because of scaling and rounding, there may be slight differences between the DSP output and the exact output values.

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