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/* -*- c++ -*- */
/*
* Copyright 2007,2012,2016 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; 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, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_DIGITAL_GLFSR_H
#define INCLUDED_DIGITAL_GLFSR_H
#include <gnuradio/digital/api.h>
#include <boost/cstdint.hpp>
namespace gr {
namespace digital {
/*!
* \brief Galois Linear Feedback Shift Register using specified polynomial mask
* \ingroup waveform_generators_blk
*
* \details
* Generates a maximal length pseudo-random sequence of length 2^degree-1
*/
class DIGITAL_API glfsr
{
private:
uint32_t d_shift_register;
uint32_t d_mask;
public:
glfsr(uint32_t mask, uint32_t seed) { d_shift_register = seed; d_mask = mask; }
~glfsr();
static uint32_t glfsr_mask(unsigned int degree);
uint8_t next_bit();
uint32_t mask() const { return d_mask; }
};
} /* namespace digital */
} /* namespace gr */
#endif /* INCLUDED_DIGITAL_GLFSR_H */
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