3 * Copyright 2002,2004,2005 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
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22 #ifndef INCLUDED_GR_FXPT_VCO_H
23 #define INCLUDED_GR_FXPT_VCO_H
26 #include <gr_complex.h>
29 * \brief Voltage Controlled Oscillator (VCO)
36 gr_fxpt_vco () : d_phase (0) {}
41 void set_phase (float angle) {
42 d_phase = gr_fxpt::float_to_fixed (angle);
45 void adjust_phase (float delta_phase) {
46 d_phase += gr_fxpt::float_to_fixed (delta_phase);
49 float get_phase () const { return gr_fxpt::fixed_to_float (d_phase); }
51 // compute sin and cos for current phase angle
52 void sincos (float *sinx, float *cosx) const
54 *sinx = gr_fxpt::sin (d_phase);
55 *cosx = gr_fxpt::cos (d_phase);
58 // compute a block at a time
59 void cos (float *output, const float *input, int noutput_items, float k, float ampl = 1.0)
61 for (int i = 0; i < noutput_items; i++){
62 output[i] = (float)(gr_fxpt::cos (d_phase) * ampl);
63 adjust_phase(input[i] * k);
67 // compute cos or sin for current phase angle
68 float cos () const { return gr_fxpt::cos (d_phase); }
69 float sin () const { return gr_fxpt::sin (d_phase); }
72 #endif /* INCLUDED_GR_FXPT_VCO_H */