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/* -*- c++ -*- */
/*
* Copyright 2007,2012 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_GR_GLFSR_SOURCE_B_H
#define INCLUDED_GR_GLFSR_SOURCE_B_H
#include <gnuradio/digital/api.h>
#include <gnuradio/sync_block.h>
namespace gr {
namespace digital {
/*!
* \brief Galois LFSR pseudo-random source
* \ingroup waveform_generators_blk
*/
class DIGITAL_API glfsr_source_b : virtual public sync_block
{
public:
// gr::digital::glfsr_source_b::sptr
typedef boost::shared_ptr<glfsr_source_b> sptr;
/*!
* Make a Galois LFSR pseudo-random source block.
*
* \param degree Degree of shift register must be in [1, 32]. If mask
* is 0, the degree determines a default mask (see
* digital_impl_glfsr.cc for the mapping).
* \param repeat Set to repeat sequence.
* \param mask Allows a user-defined bit mask for indexes of the shift
* register to feed back.
* \param seed Initial setting for values in shift register.
*/
static sptr make(int degree, bool repeat=true,
int mask=0, int seed=1);
virtual unsigned int period() const = 0;
virtual int mask() const = 0;
};
} /* namespace digital */
} /* namespace gr */
#endif /* INCLUDED_GR_GLFSR_SOURCE_B_H */
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