1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/* -*- c++ -*- */
/*
* Copyright 2002,2004,2005,2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_GR_FXPT_VCO_H
#define INCLUDED_GR_FXPT_VCO_H
#include <gnuradio/api.h>
#include <gnuradio/fxpt.h>
#include <gnuradio/gr_complex.h>
namespace gr {
/*!
* \brief Voltage Controlled Oscillator (VCO)
* \ingroup misc
*/
class /*GR_RUNTIME_API*/ fxpt_vco
{
int32_t d_phase;
public:
fxpt_vco() : d_phase(0) {}
~fxpt_vco() {}
// radians
void set_phase(float angle) { d_phase = fxpt::float_to_fixed(angle); }
void adjust_phase(float delta_phase) { d_phase += fxpt::float_to_fixed(delta_phase); }
float get_phase() const { return fxpt::fixed_to_float(d_phase); }
// compute sin and cos for current phase angle
void sincos(float* sinx, float* cosx) const
{
*sinx = fxpt::sin(d_phase);
*cosx = fxpt::cos(d_phase);
}
// compute complex sine a block at a time
void sincos(gr_complex* output,
const float* input,
int noutput_items,
float k,
float ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = gr_complex((float)(fxpt::cos(d_phase) * ampl),
(float)(fxpt::sin(d_phase) * ampl));
adjust_phase(input[i] * k);
}
}
// compute a block at a time
void
cos(float* output, const float* input, int noutput_items, float k, float ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = (float)(fxpt::cos(d_phase) * ampl);
adjust_phase(input[i] * k);
}
}
// compute cos or sin for current phase angle
float cos() const { return fxpt::cos(d_phase); }
float sin() const { return fxpt::sin(d_phase); }
};
} /* namespace gr */
#endif /* INCLUDED_GR_FXPT_VCO_H */
|
