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082bbbf8fe
Implemeted with a Galois LFSR for speed and flexibility compared to Fibonacci version. Aliases for three popular PRBS' are added for convenience - PRBS9, PRBS15 and PRBS64. Note that we can't test PRBS64 completely, because the sequence is too long to be generated. Change-Id: Ib5331ba5d0b5819929541686fdd87905e2177b74
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
/*
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* Copyright (C) 2017 Alexander Chemeris <Alexander.Chemeris@fairwaves.co>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "PRBS.h"
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#include <iostream>
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#include <cstdlib>
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#include <assert.h>
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void testPrbs(PRBS &prbs, uint64_t expectedPeriod)
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{
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uint64_t period = 0;
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do {
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std::cout << prbs.generateBit();
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period++;
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} while (!prbs.isFinished());
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std::cout << std::endl;
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std::cout << "Period: " << period << std::endl;
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assert(period == expectedPeriod);
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}
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int main(int argc, char *argv[])
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{
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PRBS9 prbs9(0x01);
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testPrbs(prbs9, (1<<9)-1);
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PRBS15 prbs15(0x01);
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testPrbs(prbs15, (1<<15)-1);
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}
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