pll_freqdet_cf_impl.cc

/* -*- c++ -*- */
/*
 * Copyright 2004,2010,2011,2018 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "pll_freqdet_cf_impl.h"
#include <gnuradio/io_signature.h>
#include <gnuradio/math.h>

#include <cmath>

namespace gr {
namespace analog {

pll_freqdet_cf::sptr pll_freqdet_cf::make(float loop_bw, float max_freq, float min_freq)
{
    return gnuradio::get_initial_sptr(
        new pll_freqdet_cf_impl(loop_bw, max_freq, min_freq));
}

pll_freqdet_cf_impl::pll_freqdet_cf_impl(float loop_bw, float max_freq, float min_freq)
    : sync_block("pll_freqdet_cf",
                 io_signature::make(1, 1, sizeof(gr_complex)),
                 io_signature::make(1, 1, sizeof(float))),
      blocks::control_loop(loop_bw, max_freq, min_freq)
{
}

pll_freqdet_cf_impl::~pll_freqdet_cf_impl() {}

float pll_freqdet_cf_impl::mod_2pi(float in)
{
    if (in > GR_M_PI)
        return in - GR_M_TWOPI;
    else if (in < -GR_M_PI)
        return in + GR_M_TWOPI;
    else
        return in;
}

float pll_freqdet_cf_impl::phase_detector(gr_complex sample, float ref_phase)
{
    float sample_phase;
    sample_phase = gr::fast_atan2f(sample.imag(), sample.real());
    return mod_2pi(sample_phase - ref_phase);
}

int pll_freqdet_cf_impl::work(int noutput_items,
                              gr_vector_const_void_star& input_items,
                              gr_vector_void_star& output_items)
{
    const gr_complex* iptr = (gr_complex*)input_items[0];
    float* optr = (float*)output_items[0];

    float error;
    int size = noutput_items;

    while (size-- > 0) {
        *optr++ = d_freq;

        error = phase_detector(*iptr++, d_phase);

        advance_loop(error);
        phase_wrap();
        frequency_limit();
    }
    return noutput_items;
}

void pll_freqdet_cf_impl::set_loop_bandwidth(float bw)
{
    blocks::control_loop::set_loop_bandwidth(bw);
}

void pll_freqdet_cf_impl::set_damping_factor(float df)
{
    blocks::control_loop::set_damping_factor(df);
}

void pll_freqdet_cf_impl::set_alpha(float alpha)
{
    blocks::control_loop::set_alpha(alpha);
}

void pll_freqdet_cf_impl::set_beta(float beta) { blocks::control_loop::set_beta(beta); }

void pll_freqdet_cf_impl::set_frequency(float freq)
{
    blocks::control_loop::set_frequency(freq);
}

void pll_freqdet_cf_impl::set_phase(float phase)
{
    blocks::control_loop::set_phase(phase);
}

void pll_freqdet_cf_impl::set_min_freq(float freq)
{
    blocks::control_loop::set_min_freq(freq);
}

void pll_freqdet_cf_impl::set_max_freq(float freq)
{
    blocks::control_loop::set_max_freq(freq);
}


float pll_freqdet_cf_impl::get_loop_bandwidth() const
{
    return blocks::control_loop::get_loop_bandwidth();
}

float pll_freqdet_cf_impl::get_damping_factor() const
{
    return blocks::control_loop::get_damping_factor();
}

float pll_freqdet_cf_impl::get_alpha() const { return blocks::control_loop::get_alpha(); }

float pll_freqdet_cf_impl::get_beta() const { return blocks::control_loop::get_beta(); }

float pll_freqdet_cf_impl::get_frequency() const
{
    return blocks::control_loop::get_frequency();
}

float pll_freqdet_cf_impl::get_phase() const { return blocks::control_loop::get_phase(); }

float pll_freqdet_cf_impl::get_min_freq() const
{
    return blocks::control_loop::get_min_freq();
}

float pll_freqdet_cf_impl::get_max_freq() const
{
    return blocks::control_loop::get_max_freq();
}

} /* namespace analog */
} /* namespace gr */