diff options
Diffstat (limited to 'docs/DSP/html/group__cos.html')
| -rw-r--r-- | docs/DSP/html/group__cos.html | 34 |
1 files changed, 13 insertions, 21 deletions
diff --git a/docs/DSP/html/group__cos.html b/docs/DSP/html/group__cos.html index 70ad705..bdeb501 100644 --- a/docs/DSP/html/group__cos.html +++ b/docs/DSP/html/group__cos.html @@ -32,7 +32,7 @@ <td id="projectlogo"><img alt="Logo" src="CMSIS_Logo_Final.png"/></td> <td style="padding-left: 0.5em;"> <div id="projectname">CMSIS-DSP -  <span id="projectnumber">Version 1.5.2</span> +  <span id="projectnumber">Version 1.7.0</span> </div> <div id="projectbrief">CMSIS DSP Software Library</div> </td> @@ -127,7 +127,7 @@ Functions</h2></td></tr> <tr class="separator:gad80f121949ef885a77d83ab36e002567"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Description</h2> -<p>Computes the trigonometric cosine 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 and in the range [0 2*pi) 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>Computes the trigonometric cosine 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> @@ -136,8 +136,8 @@ Functions</h2></td></tr> </ol> <p>where </p> <pre> - b=Table[index+0]; - c=Table[index+1]; + b = Table[index]; + c = Table[index+1]; </pre> <h2 class="groupheader">Function Documentation</h2> <a class="anchor" id="gace15287f9c64b9b4084d1c797d4c49d8"></a> <div class="memitem"> @@ -154,15 +154,11 @@ Functions</h2></td></tr> </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> + <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>cos(x). </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_8h.html#a1dec82d596780f1a66ef4f76f137c1d9">sinTable_f32</a>.</p> - -<p>Referenced by <a class="el" href="arm__sin__cos__example__f32_8c.html#a52d2cba30e6946c95578be946ac12a65">main()</a>.</p> +<dl class="section return"><dt>Returns</dt><dd>cos(x) </dd></dl> </div> </div> @@ -181,14 +177,12 @@ Functions</h2></td></tr> </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> + <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>cos(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_8h.html#a9cbcfe313f61add745ebfeddb4fecd55">sinTable_q15</a>.</p> +<dl class="section return"><dt>Returns</dt><dd>cos(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> </div> </div> @@ -207,14 +201,12 @@ Functions</h2></td></tr> </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> + <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>cos(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_8h.html#a8bfccee9e1c0042cf4a765f4b19d097d">sinTable_q31</a>.</p> +<dl class="section return"><dt>Returns</dt><dd>cos(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> </div> </div> @@ -223,7 +215,7 @@ Functions</h2></td></tr> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> - <li class="footer">Generated on Wed Aug 1 2018 17:12:21 for CMSIS-DSP by Arm Ltd. All rights reserved. + <li class="footer">Generated on Wed Jul 10 2019 15:20:39 for CMSIS-DSP Version 1.7.0 by Arm Ltd. All rights reserved. <!-- <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.6 |