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diff --git a/CMSIS/Documentation/DSP/html/group__sin.html b/CMSIS/Documentation/DSP/html/group__sin.html new file mode 100644 index 0000000..8916259 --- /dev/null +++ b/CMSIS/Documentation/DSP/html/group__sin.html @@ -0,0 +1,236 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml"> +<head> +<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> +<meta http-equiv="X-UA-Compatible" content="IE=9"/> +<title>Sine</title> +<title>CMSIS-DSP: Sine</title> +<link href="tabs.css" rel="stylesheet" type="text/css"/> +<link href="cmsis.css" rel="stylesheet" type="text/css" /> +<script type="text/javascript" src="jquery.js"></script> +<script type="text/javascript" src="dynsections.js"></script> +<script type="text/javascript" src="printComponentTabs.js"></script> +<link href="navtree.css" rel="stylesheet" type="text/css"/> +<script type="text/javascript" src="resize.js"></script> +<script type="text/javascript" src="navtree.js"></script> +<script type="text/javascript"> + $(document).ready(initResizable); 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+</script> +<div id="doc-content"> +<!-- window showing the filter options --> +<div id="MSearchSelectWindow" + onmouseover="return searchBox.OnSearchSelectShow()" + onmouseout="return searchBox.OnSearchSelectHide()" + onkeydown="return searchBox.OnSearchSelectKey(event)"> +<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Macros</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark"> </span>Pages</a></div> + +<!-- iframe showing the search results (closed by default) --> +<div id="MSearchResultsWindow"> +<iframe src="javascript:void(0)" frameborder="0" + name="MSearchResults" id="MSearchResults"> +</iframe> +</div> + +<div class="header"> + <div class="summary"> +<a href="#func-members">Functions</a> </div> + <div class="headertitle"> +<div class="title">Sine</div> </div> +<div class="ingroups"><a class="el" href="group__group_fast_math.html">Fast Math Functions</a></div></div><!--header--> +<div class="contents"> +<table class="memberdecls"> +<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a> +Functions</h2></td></tr> +<tr class="memitem:gae164899c4a3fc0e946dc5d55555fe541"><td class="memItemLeft" align="right" valign="top"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__sin.html#gae164899c4a3fc0e946dc5d55555fe541">arm_sin_f32</a> (<a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> x)</td></tr> +<tr class="memdesc:gae164899c4a3fc0e946dc5d55555fe541"><td class="mdescLeft"> </td><td class="mdescRight">Fast approximation to the trigonometric sine function for floating-point data. <a href="#gae164899c4a3fc0e946dc5d55555fe541"></a><br/></td></tr> +<tr class="separator:gae164899c4a3fc0e946dc5d55555fe541"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga1fc6d6640be6cfa688a8bea0a48397ee"><td class="memItemLeft" align="right" valign="top"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__sin.html#ga1fc6d6640be6cfa688a8bea0a48397ee">arm_sin_q15</a> (<a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> x)</td></tr> +<tr class="memdesc:ga1fc6d6640be6cfa688a8bea0a48397ee"><td class="mdescLeft"> </td><td class="mdescRight">Fast approximation to the trigonometric sine function for Q15 data. <a href="#ga1fc6d6640be6cfa688a8bea0a48397ee"></a><br/></td></tr> +<tr class="separator:ga1fc6d6640be6cfa688a8bea0a48397ee"><td class="memSeparator" colspan="2"> </td></tr> +<tr class="memitem:ga57aade7d8892585992cdc6375bd82f9c"><td class="memItemLeft" align="right" valign="top"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__sin.html#ga57aade7d8892585992cdc6375bd82f9c">arm_sin_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> x)</td></tr> +<tr class="memdesc:ga57aade7d8892585992cdc6375bd82f9c"><td class="mdescLeft"> </td><td class="mdescRight">Fast approximation to the trigonometric sine function for Q31 data. <a href="#ga57aade7d8892585992cdc6375bd82f9c"></a><br/></td></tr> +<tr class="separator:ga57aade7d8892585992cdc6375bd82f9c"><td class="memSeparator" colspan="2"> </td></tr> +</table> +<a name="details" id="details"></a><h2 class="groupheader">Description</h2> +<p>Computes the trigonometric sine function using a combination of table lookup and linear interpolation. There are separate functions for Q15, Q31, and floating-point data types. The input to the floating-point version is in radians while the fixed-point Q15 and Q31 have a scaled input with the range [0 +0.9999] mapping to [0 2*pi). The fixed-point range is chosen so that a value of 2*pi wraps around to 0.</p> +<p>The implementation is based on table lookup using 256 values together with linear interpolation. The steps used are:</p> +<ol type="1"> +<li>Calculation of the nearest integer table index</li> +<li>Compute the fractional portion (fract) of the table index.</li> +<li>The final result equals <code>(1.0f-fract)*a + fract*b;</code></li> +</ol> +<p>where </p> +<pre> + b=Table[index+0]; + c=Table[index+1]; +</pre> <h2 class="groupheader">Function Documentation</h2> +<a class="anchor" id="gae164899c4a3fc0e946dc5d55555fe541"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> arm_sin_f32 </td> + <td>(</td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> </td> + <td class="paramname"><em>x</em></td><td>)</td> + <td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">x</td><td>input value in radians. </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>sin(x). </dd></dl> +<dl><dt><b>Examples: </b></dt><dd><a class="el" href="arm_linear_interp_example_f32_8c-example.html#a12">arm_linear_interp_example_f32.c</a>, and <a class="el" href="arm_sin_cos_example_f32_8c-example.html#a12">arm_sin_cos_example_f32.c</a>.</dd> +</dl> +<p>References <a class="el" href="arm__math_8h.html#afcb9147c96853bea484cfc2dde07463d">FAST_MATH_TABLE_SIZE</a>, and <a class="el" href="arm__common__tables_8c.html#a1dec82d596780f1a66ef4f76f137c1d9">sinTable_f32</a>.</p> + +<p>Referenced by <a class="el" href="arm__linear__interp__example__f32_8c.html#a52d2cba30e6946c95578be946ac12a65">main()</a>.</p> + +</div> +</div> +<a class="anchor" id="ga1fc6d6640be6cfa688a8bea0a48397ee"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> arm_sin_q15 </td> + <td>(</td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> </td> + <td class="paramname"><em>x</em></td><td>)</td> + <td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">x</td><td>Scaled input value in radians. </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>sin(x).</dd></dl> +<p>The Q15 input value is in the range [0 +0.9999] and is mapped to a radian value in the range [0 2*pi). </p> + +<p>References <a class="el" href="arm__math_8h.html#a34716b73c631e65e8dd855e08384ecb2">FAST_MATH_Q15_SHIFT</a>, and <a class="el" href="arm__common__tables_8c.html#a9cbcfe313f61add745ebfeddb4fecd55">sinTable_q15</a>.</p> + +</div> +</div> +<a class="anchor" id="ga57aade7d8892585992cdc6375bd82f9c"></a> +<div class="memitem"> +<div class="memproto"> + <table class="memname"> + <tr> + <td class="memname"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> arm_sin_q31 </td> + <td>(</td> + <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> </td> + <td class="paramname"><em>x</em></td><td>)</td> + <td></td> + </tr> + </table> +</div><div class="memdoc"> +<dl class="params"><dt>Parameters</dt><dd> + <table class="params"> + <tr><td class="paramdir">[in]</td><td class="paramname">x</td><td>Scaled input value in radians. </td></tr> + </table> + </dd> +</dl> +<dl class="section return"><dt>Returns</dt><dd>sin(x).</dd></dl> +<p>The Q31 input value is in the range [0 +0.9999] and is mapped to a radian value in the range [0 2*pi). </p> + +<p>References <a class="el" href="arm__math_8h.html#a4268f77b1811a0c7fc2532a0bf6108b0">FAST_MATH_Q31_SHIFT</a>, and <a class="el" href="arm__common__tables_8c.html#a8bfccee9e1c0042cf4a765f4b19d097d">sinTable_q31</a>.</p> + +</div> +</div> +</div><!-- contents --> +</div><!-- doc-content --> +<!-- start footer part --> +<div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> + <ul> + <li class="footer">Generated on Tue Oct 27 2015 14:35:33 for CMSIS-DSP by ARM Ltd. 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