3 * Copyright 2007 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
23 // WARNING: this file is machine generated. Edits will be over written
29 #include <gr_dpll_ff.h>
30 #include <gr_io_signature.h>
33 gr_make_dpll_ff (float period, float gain)
35 return gr_dpll_ff_sptr (new gr_dpll_ff (period, gain));
38 gr_dpll_ff::gr_dpll_ff (float period, float gain)
39 : gr_sync_block ("dpll_ff",
40 gr_make_io_signature (1, 1, sizeof (float)),
41 gr_make_io_signature (1, 1, sizeof (float))),
42 d_restart(0),d_pulse_phase(0)
44 d_pulse_frequency = 1.0/period;
46 d_decision_threshold = 1.0 - 0.5*d_pulse_frequency;
48 fprintf(stderr,"frequency = %f period = %f gain = %f threshold = %f\n",
52 d_decision_threshold);
54 set_history(1); // so we can look behind us
58 gr_dpll_ff::work (int noutput_items,
59 gr_vector_const_void_star &input_items,
60 gr_vector_void_star &output_items)
62 float *iptr = (float *) input_items[0];
63 float *optr = (float *) output_items[0];
65 for (int i = 0; i < noutput_items; i++){
67 if(iptr[i] ==(float)1) {
71 if (d_pulse_phase > 0.5) d_pulse_phase += d_gain*(1.0-d_pulse_phase);
72 else d_pulse_phase -= d_gain*d_pulse_phase;
76 if (d_pulse_phase > d_decision_threshold) {
83 d_pulse_phase += d_pulse_frequency;