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URL https://opencores.org/ocsvn/dblclockfft/dblclockfft/trunk

Subversion Repositories dblclockfft

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  • This comparison shows the changes necessary to convert path 
    /dblclockfft/trunk/sw
    from Rev 15 to Rev 16
    ↔ Reverse comparison
  •

Rev 15 → Rev 16

/fftgen.cpp
1,3 → 1,54
/////////////////////////////////////////////////////////////////////////////
//
// Filename: fftgen.v
//
// Project: A Doubletime Pipelined FFT
//
// Purpose: This is the core generator for the project. Every part
// and piece of this project begins and ends in this program.
// Once built, this program will build an FFT (or IFFT) core
// of arbitrary width, precision, etc., that will run at
// two samples per clock. (Incidentally, I didn't pick two
// samples per clock because it was easier, but rather because
// there weren't any two-sample per clock FFT's posted on
// opencores.com. Further, FFT's running at one sample per
// clock aren't that hard to find.)
//
// You can find the documentation for this program in two places.
// One is in the usage() function below. The second is in the
// 'doc'uments directory that comes with this package,
// specifically in the spec.pdf file. If it's not there, type
// make in the documents directory to build it.
//
// Creator: Dan Gisselquist, Ph.D.
// Gisselquist Tecnology, LLC
//
///////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2015, Gisselquist Technology, LLC
//
// This program is free software (firmware): you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or (at
// your option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. (It's in the $(ROOT)/doc directory, run make with no
// target there if the PDF file isn't present.) If not, see
// <http://www.gnu.org/licenses/> for a copy.
//
// License: GPL, v3, as defined and found on www.gnu.org,
// http://www.gnu.org/licenses/gpl.html
//
//
///////////////////////////////////////////////////////////////////////////
//
//
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
812,8 → 863,10
"\treg\tsigned\t[(CWIDTH+IWIDTH+3-1):0] mpy_r, mpy_i;\n"
"\treg\tsigned\t[(CWIDTH+IWIDTH+3-1):0] rnd;\n"
"\tgenerate\n"
"\tif ((ROUND==0)||(CWIDTH+IWIDTH-OWIDTH-SHIFT<1))\n"
"\tif ((ROUND==0)||(CWIDTH+IWIDTH-OWIDTH-SHIFT<2))\n"
"\t\tassign rnd = ({(CWIDTH+IWIDTH+3){1'b0}});\n"
"\telse if ((IWIDTH+CWIDTH)-(OWIDTH+SHIFT) == 2)\n"
"\t\tassign rnd = ({ {(OWIDTH+4+SHIFT){1'b0}},1'b1 });\n"
"\telse\n"
"\t\tassign rnd = ({ {(OWIDTH+4+SHIFT){1'b0}},1'b1,\n"
"\t\t\t\t{((IWIDTH+CWIDTH+3)-(OWIDTH+SHIFT+5)){1'b0}} });\n"
1594,3 → 1647,4
}
}
 
 
/Makefile
1,3 → 1,48
############################################################################/
##
## Filename: fftgen.v
##
## Project: A Doubletime Pipelined FFT
##
## Purpose: This is the main Makefile for the FFT core generator.
## It is very simple in its construction, the most complicated
## parts being the building of the Verilator simulation--a
## step that may not be required for your project.
##
## To build the FFT generator, just type 'make' on a line
## by itself. For a quick tutorial in how to run the
## generator, just type './fftgen -h' to read the usage()
## statement.
##
## Creator: Dan Gisselquist, Ph.D.
## Gisselquist Tecnology, LLC
##
##########################################################################/
##
## Copyright (C) 2015, Gisselquist Technology, LLC
##
## This program is free software (firmware): you can redistribute it and/or
## modify it under the terms of the GNU General Public License as published
## by the Free Software Foundation, either version 3 of the License, or (at
## your option) any later version.
##
## This program is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
## for more details.
##
## You should have received a copy of the GNU General Public License along
## with this program. (It's in the $(ROOT)/doc directory, run make with no
## target there if the PDF file isn't present.) If not, see
## <http:##www.gnu.org/licenses/> for a copy.
##
## License: GPL, v3, as defined and found on www.gnu.org,
## http:##www.gnu.org/licenses/gpl.html
##
##
##########################################################################/
##
##
# This is really simple ...
all: fftgen
CORED := fft-core
12,6 → 57,13
.PHONY: test
test: fft ifft shiftaddmpy butterfly dblreverse qtrstage dblstage fftstage_o2048
 
#
# Although these parameters, a 2048 point FFT of 16 bits input, aren't
# the only parameters the FFT can do, they are the ones that the test
# benches depend upon. If you change these, and you are welcome to do so,
# you may need to adjust the test benches if you wish to prove that your
# changes work.
#
.PHONY: fft
fft: fftgen
./fftgen -f 2048 -n 16

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