diff options
Diffstat (limited to 'gr-analog/lib')
| -rw-r--r-- | gr-analog/lib/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | gr-analog/lib/dpll_bb_impl.cc | 98 | ||||
| -rw-r--r-- | gr-analog/lib/dpll_bb_impl.h | 58 |
3 files changed, 157 insertions, 0 deletions
diff --git a/gr-analog/lib/CMakeLists.txt b/gr-analog/lib/CMakeLists.txt index f7281477e..258d5d67c 100644 --- a/gr-analog/lib/CMakeLists.txt +++ b/gr-analog/lib/CMakeLists.txt @@ -112,6 +112,7 @@ list(APPEND analog_sources agc2_ff_impl.cc cpfsk_bc_impl.cc ctcss_squelch_ff_impl.cc + dpll_bb_impl.cc feedforward_agc_cc_impl.cc ) diff --git a/gr-analog/lib/dpll_bb_impl.cc b/gr-analog/lib/dpll_bb_impl.cc new file mode 100644 index 000000000..a199b66b4 --- /dev/null +++ b/gr-analog/lib/dpll_bb_impl.cc @@ -0,0 +1,98 @@ +/* -*- c++ -*- */ +/* + * Copyright 2007,2009,2010 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 "dpll_bb_impl.h" +#include <gr_io_signature.h> +#include <cstdio> + +namespace gr { + namespace analog { + + dpll_bb::sptr + dpll_bb::make(float period, float gain) + { + return gnuradio::get_initial_sptr + (new dpll_bb_impl(period, gain)); + } + + dpll_bb_impl::dpll_bb_impl(float period, float gain) + : gr_sync_block("dpll_bb", + gr_make_io_signature(1, 1, sizeof(char)), + gr_make_io_signature(1, 1, sizeof(char))), + d_restart(0), d_pulse_phase(0) + { + d_pulse_frequency = 1.0/period; + d_gain = gain; + d_decision_threshold = 1.0 - 0.5*d_pulse_frequency; +#if 0 + fprintf(stderr,"frequency = %f period = %f gain = %f threshold = %f\n", + d_pulse_frequency, + period, + d_gain, + d_decision_threshold); +#endif + } + + dpll_bb_impl::~dpll_bb_impl() + { + } + + int + dpll_bb_impl::work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) + { + const char *iptr = (const char*)input_items[0]; + char *optr = (char*)output_items[0]; + + for(int i = 0; i < noutput_items; i++) { + optr[i]= 0; + if(iptr[i] == 1) { + if(d_restart == 0) { + d_pulse_phase = 1; + } + else { + if(d_pulse_phase > 0.5) + d_pulse_phase += d_gain*(1.0-d_pulse_phase); + else + d_pulse_phase -= d_gain*d_pulse_phase; + } + d_restart = 3; + } + if(d_pulse_phase > d_decision_threshold) { + d_pulse_phase -= 1.0; + if(d_restart > 0) { + d_restart -= 1; + optr[i] = 1; + } + } + d_pulse_phase += d_pulse_frequency; + } + return noutput_items; + } + + } /* namespace analog */ +} /* namespace gr */ diff --git a/gr-analog/lib/dpll_bb_impl.h b/gr-analog/lib/dpll_bb_impl.h new file mode 100644 index 000000000..a1d8b7709 --- /dev/null +++ b/gr-analog/lib/dpll_bb_impl.h @@ -0,0 +1,58 @@ +/* -*- 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_ANALOG_DPLL_BB_IMPL_H +#define INCLUDED_ANALOG_DPLL_BB_IMPL_H + +#include <analog/dpll_bb.h> + +namespace gr { + namespace analog { + + class dpll_bb_impl : public dpll_bb + { + private: + unsigned char d_restart; + float d_pulse_phase, d_pulse_frequency; + float d_gain, d_decision_threshold; + + public: + dpll_bb_impl(float period, float gain); + ~dpll_bb_impl(); + + void set_gain(float gain) { d_gain = gain; } + void set_decision_threshold(float thresh) { d_decision_threshold = thresh; } + + float gain() const { return d_gain; } + float freq() const { return d_pulse_frequency; } + float phase() const { return d_pulse_phase; } + float decision_threshold() const { return d_decision_threshold; } + + int work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); + }; + + } /* namespace analog */ +} /* namespace gr */ + +#endif /* INCLUDED_ANALOG_DPLL_BB_IMPL_H */ |