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<h1>gr_fxpt_vco.h</h1> </div>
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<a href="gr__fxpt__vco_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c++ -*- */</span>
<a name="l00002"></a>00002 <span class="comment">/*</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright 2002,2004,2005 Free Software Foundation, Inc.</span>
<a name="l00004"></a>00004 <span class="comment"> * </span>
<a name="l00005"></a>00005 <span class="comment"> * This file is part of GNU Radio</span>
<a name="l00006"></a>00006 <span class="comment"> * </span>
<a name="l00007"></a>00007 <span class="comment"> * GNU Radio is free software; you can redistribute it and/or modify</span>
<a name="l00008"></a>00008 <span class="comment"> * it under the terms of the GNU General Public License as published by</span>
<a name="l00009"></a>00009 <span class="comment"> * the Free Software Foundation; either version 3, or (at your option)</span>
<a name="l00010"></a>00010 <span class="comment"> * any later version.</span>
<a name="l00011"></a>00011 <span class="comment"> * </span>
<a name="l00012"></a>00012 <span class="comment"> * GNU Radio is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00015"></a>00015 <span class="comment"> * GNU General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> * </span>
<a name="l00017"></a>00017 <span class="comment"> * You should have received a copy of the GNU General Public License</span>
<a name="l00018"></a>00018 <span class="comment"> * along with GNU Radio; see the file COPYING. If not, write to</span>
<a name="l00019"></a>00019 <span class="comment"> * the Free Software Foundation, Inc., 51 Franklin Street,</span>
<a name="l00020"></a>00020 <span class="comment"> * Boston, MA 02110-1301, USA.</span>
<a name="l00021"></a>00021 <span class="comment"> */</span>
<a name="l00022"></a>00022 <span class="preprocessor">#ifndef INCLUDED_GR_FXPT_VCO_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#define INCLUDED_GR_FXPT_VCO_H</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <<a class="code" href="gr__fxpt_8h.html">gr_fxpt.h</a>></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <gr_complex.h></span>
<a name="l00027"></a>00027 <span class="comment"></span>
<a name="l00028"></a>00028 <span class="comment">/*!</span>
<a name="l00029"></a>00029 <span class="comment"> * \brief Voltage Controlled Oscillator (VCO)</span>
<a name="l00030"></a>00030 <span class="comment"> * \ingroup misc</span>
<a name="l00031"></a>00031 <span class="comment"> */</span>
<a name="l00032"></a><a class="code" href="classgr__fxpt__vco.html">00032</a> <span class="keyword">class </span><a class="code" href="classgr__fxpt__vco.html" title="Voltage Controlled Oscillator (VCO)">gr_fxpt_vco</a> {
<a name="l00033"></a>00033 <a class="code" href="gr__types_8h.html#ac07cda22882f844c0aa1633d49f1c144">gr_int32</a> d_phase;
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">public</span>:
<a name="l00036"></a><a class="code" href="classgr__fxpt__vco.html#a4e860d580836619158f008077dfc2880">00036</a> <a class="code" href="classgr__fxpt__vco.html#a4e860d580836619158f008077dfc2880">gr_fxpt_vco</a> () : d_phase (0) {}
<a name="l00037"></a>00037
<a name="l00038"></a><a class="code" href="classgr__fxpt__vco.html#a32615938fbf63671a723c367d9920e0a">00038</a> <a class="code" href="classgr__fxpt__vco.html#a32615938fbf63671a723c367d9920e0a">~gr_fxpt_vco</a> () {}
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">// radians</span>
<a name="l00041"></a><a class="code" href="classgr__fxpt__vco.html#a8aeadf8f5afddec7ffb5e969b8c4e1b5">00041</a> <span class="keywordtype">void</span> <a class="code" href="classgr__fxpt__vco.html#a8aeadf8f5afddec7ffb5e969b8c4e1b5">set_phase</a> (<span class="keywordtype">float</span> angle) {
<a name="l00042"></a>00042 d_phase = <a class="code" href="classgr__fxpt.html#a8cf5f6942dd8db09072fb711d09b4820">gr_fxpt::float_to_fixed</a> (angle);
<a name="l00043"></a>00043 }
<a name="l00044"></a>00044
<a name="l00045"></a><a class="code" href="classgr__fxpt__vco.html#aacf093027fc95da11b86802e409ef3cf">00045</a> <span class="keywordtype">void</span> <a class="code" href="classgr__fxpt__vco.html#aacf093027fc95da11b86802e409ef3cf">adjust_phase</a> (<span class="keywordtype">float</span> delta_phase) {
<a name="l00046"></a>00046 d_phase += <a class="code" href="classgr__fxpt.html#a8cf5f6942dd8db09072fb711d09b4820">gr_fxpt::float_to_fixed</a> (delta_phase);
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048
<a name="l00049"></a><a class="code" href="classgr__fxpt__vco.html#af2a50adafe9c40aa2534c5618551e33c">00049</a> <span class="keywordtype">float</span> <a class="code" href="classgr__fxpt__vco.html#af2a50adafe9c40aa2534c5618551e33c">get_phase</a> ()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classgr__fxpt.html#a4b89af0770b5c4751f52224976514c20">gr_fxpt::fixed_to_float</a> (d_phase); }
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="comment">// compute sin and cos for current phase angle</span>
<a name="l00052"></a><a class="code" href="classgr__fxpt__vco.html#a443c10e81f1722ab5364ead0b1612d3e">00052</a> <span class="keywordtype">void</span> <a class="code" href="classgr__fxpt__vco.html#a443c10e81f1722ab5364ead0b1612d3e">sincos</a> (<span class="keywordtype">float</span> *sinx, <span class="keywordtype">float</span> *cosx)<span class="keyword"> const</span>
<a name="l00053"></a>00053 <span class="keyword"> </span>{
<a name="l00054"></a>00054 *sinx = <a class="code" href="classgr__fxpt__vco.html#a63370377ded71e47cde223b3a8f2a3c1">gr_fxpt::sin</a> (d_phase);
<a name="l00055"></a>00055 *cosx = <a class="code" href="classgr__fxpt__vco.html#a28535e3ca22a805bc8e949124aa466be">gr_fxpt::cos</a> (d_phase);
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="comment">// compute a block at a time</span>
<a name="l00059"></a><a class="code" href="classgr__fxpt__vco.html#add26607d8252aa8633bfcf5e6514b8df">00059</a> <span class="keywordtype">void</span> <a class="code" href="classgr__fxpt__vco.html#a28535e3ca22a805bc8e949124aa466be">cos</a> (<span class="keywordtype">float</span> *output, <span class="keyword">const</span> <span class="keywordtype">float</span> *input, <span class="keywordtype">int</span> noutput_items, <span class="keywordtype">float</span> k, <span class="keywordtype">float</span> ampl = 1.0)
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < noutput_items; i++){
<a name="l00062"></a>00062 output[i] = (float)(<a class="code" href="classgr__fxpt.html#a61861c9e4535e05a567a96a2551430a9">gr_fxpt::cos</a> (d_phase) * ampl);
<a name="l00063"></a>00063 <a class="code" href="classgr__fxpt__vco.html#aacf093027fc95da11b86802e409ef3cf">adjust_phase</a>(input[i] * k);
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="comment">// compute cos or sin for current phase angle</span>
<a name="l00068"></a><a class="code" href="classgr__fxpt__vco.html#a28535e3ca22a805bc8e949124aa466be">00068</a> <span class="keywordtype">float</span> <a class="code" href="classgr__fxpt__vco.html#a28535e3ca22a805bc8e949124aa466be">cos</a> ()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classgr__fxpt__vco.html#a28535e3ca22a805bc8e949124aa466be">gr_fxpt::cos</a> (d_phase); }
<a name="l00069"></a><a class="code" href="classgr__fxpt__vco.html#a63370377ded71e47cde223b3a8f2a3c1">00069</a> <span class="keywordtype">float</span> <a class="code" href="classgr__fxpt__vco.html#a63370377ded71e47cde223b3a8f2a3c1">sin</a> ()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classgr__fxpt__vco.html#a63370377ded71e47cde223b3a8f2a3c1">gr_fxpt::sin</a> (d_phase); }
<a name="l00070"></a>00070 };
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="preprocessor">#endif </span><span class="comment">/* INCLUDED_GR_FXPT_VCO_H */</span>
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