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/* -*- c++ -*- */
/*
* Copyright 2004,2010,2012 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.
*/
/* @WARNING@ */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "@IMPL_NAME@.h"
#include <algorithm>
#include <gr_io_signature.h>
#include <stdexcept>
#include <algorithm>
#include <gr_complex.h>
namespace gr {
namespace analog {
@BASE_NAME@::sptr
@BASE_NAME@::make(double sampling_freq, gr_waveform_t waveform,
double frequency, double ampl, @TYPE@ offset)
{
return gnuradio::get_initial_sptr
(new @IMPL_NAME@(sampling_freq, waveform, frequency, ampl, offset));
}
@IMPL_NAME@::@IMPL_NAME@(double sampling_freq, gr_waveform_t waveform,
double frequency, double ampl, @TYPE@ offset)
: gr_sync_block("@BASE_NAME@",
gr_make_io_signature(0, 0, 0),
gr_make_io_signature(1, 1, sizeof(@TYPE@))),
d_sampling_freq(sampling_freq), d_waveform(waveform),
d_frequency(frequency), d_ampl(ampl), d_offset(offset)
{
d_nco.set_freq(2 * M_PI * d_frequency / d_sampling_freq);
}
@IMPL_NAME@::~@IMPL_NAME@()
{
}
int
@IMPL_NAME@::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
@TYPE@ *optr = (@TYPE@*)output_items[0];
@TYPE@ t;
switch(d_waveform) {
#if @IS_COMPLEX@ // complex?
case GR_CONST_WAVE:
t = (gr_complex) d_ampl + d_offset;
std::fill_n(optr, noutput_items, t);
break;
case GR_SIN_WAVE:
case GR_COS_WAVE:
d_nco.sincos(optr, noutput_items, d_ampl);
if(d_offset == gr_complex(0,0))
break;
for(int i = 0; i < noutput_items; i++) {
optr[i] += d_offset;
}
break;
/* Implements a real square wave high from -PI to 0.
* The imaginary square wave leads by 90 deg.
*/
case GR_SQR_WAVE:
for(int i = 0; i < noutput_items; i++) {
if(d_nco.get_phase() < -1*M_PI/2)
optr[i] = gr_complex(d_ampl, 0) + d_offset;
else if(d_nco.get_phase() < 0)
optr[i] = gr_complex(d_ampl, d_ampl) + d_offset;
else if(d_nco.get_phase() < M_PI/2)
optr[i] = gr_complex(0, d_ampl) + d_offset;
else
optr[i] = d_offset;
d_nco.step();
}
break;
/* Implements a real triangle wave rising from -PI to 0 and
* falling from 0 to PI. The imaginary triangle wave leads by
* 90 deg.
*/
case GR_TRI_WAVE:
for(int i = 0; i < noutput_items; i++) {
if(d_nco.get_phase() < -1*M_PI/2){
optr[i] = gr_complex(d_ampl*d_nco.get_phase()/M_PI + d_ampl,
-1*d_ampl*d_nco.get_phase()/M_PI - d_ampl/2) + d_offset;
}
else if(d_nco.get_phase() < 0) {
optr[i] = gr_complex(d_ampl*d_nco.get_phase()/M_PI + d_ampl,
d_ampl*d_nco.get_phase()/M_PI + d_ampl/2) + d_offset;
}
else if(d_nco.get_phase() < M_PI/2) {
optr[i] = gr_complex(-1*d_ampl*d_nco.get_phase()/M_PI + d_ampl,
d_ampl*d_nco.get_phase()/M_PI + d_ampl/2) + d_offset;
}
else {
optr[i] = gr_complex(-1*d_ampl*d_nco.get_phase()/M_PI + d_ampl,
-1*d_ampl*d_nco.get_phase()/M_PI + 3*d_ampl/2) + d_offset;
}
d_nco.step();
}
break;
/* Implements a real saw tooth wave rising from -PI to PI.
* The imaginary saw tooth wave leads by 90 deg.
*/
case GR_SAW_WAVE:
for(int i = 0; i < noutput_items; i++) {
if(d_nco.get_phase() < -1*M_PI/2) {
optr[i] = gr_complex(d_ampl*d_nco.get_phase()/(2*M_PI) + d_ampl/2,
d_ampl*d_nco.get_phase()/(2*M_PI) + 5*d_ampl/4) + d_offset;
}
else {
optr[i] = gr_complex(d_ampl*d_nco.get_phase()/(2*M_PI) + d_ampl/2,
d_ampl*d_nco.get_phase()/(2*M_PI) + d_ampl/4) + d_offset;
}
d_nco.step();
}
break;
#else // nope...
case GR_CONST_WAVE:
t = (@TYPE@)d_ampl + d_offset;
std::fill_n(optr, noutput_items, t);
break;
case GR_SIN_WAVE:
d_nco.sin(optr, noutput_items, d_ampl);
if(d_offset == 0)
break;
for(int i = 0; i < noutput_items; i++) {
optr[i] += d_offset;
}
break;
case GR_COS_WAVE:
d_nco.cos(optr, noutput_items, d_ampl);
if(d_offset == 0)
break;
for(int i = 0; i < noutput_items; i++) {
optr[i] += d_offset;
}
break;
/* The square wave is high from -PI to 0. */
case GR_SQR_WAVE:
t = (@TYPE@)d_ampl + d_offset;
for(int i = 0; i < noutput_items; i++) {
if(d_nco.get_phase() < 0)
optr[i] = t;
else
optr[i] = d_offset;
d_nco.step();
}
break;
/* The triangle wave rises from -PI to 0 and falls from 0 to PI. */
case GR_TRI_WAVE:
for(int i = 0; i < noutput_items; i++) {
double t = d_ampl*d_nco.get_phase()/M_PI;
if (d_nco.get_phase() < 0)
optr[i] = static_cast<@TYPE@>(t + d_ampl + d_offset);
else
optr[i] = static_cast<@TYPE@>(-1*t + d_ampl + d_offset);
d_nco.step();
}
break;
/* The saw tooth wave rises from -PI to PI. */
case GR_SAW_WAVE:
for(int i = 0; i < noutput_items; i++) {
t = static_cast<@TYPE@>(d_ampl*d_nco.get_phase()/(2*M_PI)
+ d_ampl/2 + d_offset);
optr[i] = t;
d_nco.step();
}
break;
#endif
default:
throw std::runtime_error("gr_sig_source: invalid waveform");
}
return noutput_items;
}
void
@NAME@::set_sampling_freq(double sampling_freq)
{
d_sampling_freq = sampling_freq;
d_nco.set_freq (2 * M_PI * d_frequency / d_sampling_freq);
}
void
@NAME@::set_waveform(gr_waveform_t waveform)
{
d_waveform = waveform;
}
void
@NAME@::set_frequency(double frequency)
{
d_frequency = frequency;
d_nco.set_freq(2 * M_PI * d_frequency / d_sampling_freq);
}
void
@NAME@::set_amplitude(double ampl)
{
d_ampl = ampl;
}
void
@NAME@::set_offset(@TYPE@ offset)
{
d_offset = offset;
}
} /* namespace analog */
} /* namespace gr */
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