| <!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>arm_fft_bin_example_f32.c</title> |
| <title>CMSIS-DSP: arm_fft_bin_example_f32.c</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); |
| </script> |
| <link href="search/search.css" rel="stylesheet" type="text/css"/> |
| <script type="text/javascript" src="search/search.js"></script> |
| <script type="text/javascript"> |
| $(document).ready(function() { searchBox.OnSelectItem(0); }); |
| </script> |
| <link href="stylsheetf" rel="stylesheet" type="text/css" /> |
| </head> |
| <body> |
| <div id="top"><!-- do not remove this div, it is closed by doxygen! --> |
| <div id="titlearea"> |
| <table cellspacing="0" cellpadding="0"> |
| <tbody> |
| <tr style="height: 46px;"> |
| <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 1.4.7</span> |
| </div> |
| <div id="projectbrief">CMSIS DSP Software Library</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <!-- end header part --> |
| <div id="CMSISnav" class="tabs1"> |
| <ul class="tablist"> |
| <script type="text/javascript"> |
| <!-- |
| writeComponentTabs.call(this); |
| //--> |
| </script> |
| </ul> |
| </div> |
| <!-- Generated by Doxygen 1.8.2 --> |
| <script type="text/javascript"> |
| var searchBox = new SearchBox("searchBox", "search",false,'Search'); |
| </script> |
| <div id="navrow1" class="tabs"> |
| <ul class="tablist"> |
| <li><a href="index.html"><span>Main Page</span></a></li> |
| <li><a href="pages.html"><span>Usage and Description</span></a></li> |
| <li><a href="modules.html"><span>Reference</span></a></li> |
| <li> |
| <div id="MSearchBox" class="MSearchBoxInactive"> |
| <span class="left"> |
| <img id="MSearchSelect" src="search/mag_sel.png" |
| onmouseover="return searchBox.OnSearchSelectShow()" |
| onmouseout="return searchBox.OnSearchSelectHide()" |
| alt=""/> |
| <input type="text" id="MSearchField" value="Search" accesskey="S" |
| onfocus="searchBox.OnSearchFieldFocus(true)" |
| onblur="searchBox.OnSearchFieldFocus(false)" |
| onkeyup="searchBox.OnSearchFieldChange(event)"/> |
| </span><span class="right"> |
| <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a> |
| </span> |
| </div> |
| </li> |
| </ul> |
| </div> |
| </div><!-- top --> |
| <div id="side-nav" class="ui-resizable side-nav-resizable"> |
| <div id="nav-tree"> |
| <div id="nav-tree-contents"> |
| <div id="nav-sync" class="sync"></div> |
| </div> |
| </div> |
| <div id="splitbar" style="-moz-user-select:none;" |
| class="ui-resizable-handle"> |
| </div> |
| </div> |
| <script type="text/javascript"> |
| $(document).ready(function(){initNavTree('arm_fft_bin_example_f32_8c-example.html','');}); |
| </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="headertitle"> |
| <div class="title">arm_fft_bin_example_f32.c</div> </div> |
| </div><!--header--> |
| <div class="contents"> |
| <div class="fragment"><div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div> |
| <div class="line"><span class="comment">* Copyright (C) 2010-2012 ARM Limited. All rights reserved.</span></div> |
| <div class="line"><span class="comment">*</span></div> |
| <div class="line"><span class="comment">* $Date: 17. January 2013</span></div> |
| <div class="line"><span class="comment">* $Revision: V1.4.0</span></div> |
| <div class="line"><span class="comment">*</span></div> |
| <div class="line"><span class="comment">* Project: CMSIS DSP Library</span></div> |
| <div class="line"><span class="comment">* Title: arm_fft_bin_example_f32.c</span></div> |
| <div class="line"><span class="comment">*</span></div> |
| <div class="line"><span class="comment">* Description: Example code demonstrating calculation of Max energy bin of</span></div> |
| <div class="line"><span class="comment">* frequency domain of input signal.</span></div> |
| <div class="line"><span class="comment">*</span></div> |
| <div class="line"><span class="comment">* Target Processor: Cortex-M4/Cortex-M3</span></div> |
| <div class="line"><span class="comment">*</span></div> |
| <div class="line"><span class="comment">* Redistribution and use in source and binary forms, with or without</span></div> |
| <div class="line"><span class="comment">* modification, are permitted provided that the following conditions</span></div> |
| <div class="line"><span class="comment">* are met:</span></div> |
| <div class="line"><span class="comment">* - Redistributions of source code must retain the above copyright</span></div> |
| <div class="line"><span class="comment">* notice, this list of conditions and the following disclaimer.</span></div> |
| <div class="line"><span class="comment">* - Redistributions in binary form must reproduce the above copyright</span></div> |
| <div class="line"><span class="comment">* notice, this list of conditions and the following disclaimer in</span></div> |
| <div class="line"><span class="comment">* the documentation and/or other materials provided with the</span></div> |
| <div class="line"><span class="comment">* distribution.</span></div> |
| <div class="line"><span class="comment">* - Neither the name of ARM LIMITED nor the names of its contributors</span></div> |
| <div class="line"><span class="comment">* may be used to endorse or promote products derived from this</span></div> |
| <div class="line"><span class="comment">* software without specific prior written permission.</span></div> |
| <div class="line"><span class="comment">*</span></div> |
| <div class="line"><span class="comment">* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span></div> |
| <div class="line"><span class="comment">* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span></div> |
| <div class="line"><span class="comment">* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div> |
| <div class="line"><span class="comment">* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE</span></div> |
| <div class="line"><span class="comment">* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,</span></div> |
| <div class="line"><span class="comment">* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,</span></div> |
| <div class="line"><span class="comment">* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;</span></div> |
| <div class="line"><span class="comment">* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER</span></div> |
| <div class="line"><span class="comment">* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT</span></div> |
| <div class="line"><span class="comment">* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN</span></div> |
| <div class="line"><span class="comment">* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE</span></div> |
| <div class="line"><span class="comment">* POSSIBILITY OF SUCH DAMAGE.</span></div> |
| <div class="line"><span class="comment"> * -------------------------------------------------------------------- */</span></div> |
| <div class="line"></div> |
| <div class="line"><span class="preprocessor">#include "<a class="code" href="arm__math_8h.html">arm_math.h</a>"</span></div> |
| <div class="line"><span class="preprocessor">#include "<a class="code" href="arm__const__structs_8h.html">arm_const_structs.h</a>"</span></div> |
| <div class="line"></div> |
| <div class="line"><span class="preprocessor">#define TEST_LENGTH_SAMPLES 2048</span></div> |
| <div class="line"><span class="preprocessor"></span></div> |
| <div class="line"><span class="comment">/* -------------------------------------------------------------------</span></div> |
| <div class="line"><span class="comment">* External Input and Output buffer Declarations for FFT Bin Example</span></div> |
| <div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div> |
| <div class="line"><span class="keyword">extern</span> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a0"></a><a class="code" href="_a_r_m_2arm__fft__bin__data_8c.html#a8a12a8ec4b866be84f4b7d3daf6a1242">testInput_f32_10khz</a>[<a name="a1"></a><a class="code" href="_a_r_m_2arm__class__marks__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>];</div> |
| <div class="line"><span class="keyword">static</span> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a2"></a><a class="code" href="_a_r_m_2arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>[<a class="code" href="_a_r_m_2arm__class__marks__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>/2];</div> |
| <div class="line"></div> |
| <div class="line"><span class="comment">/* ------------------------------------------------------------------</span></div> |
| <div class="line"><span class="comment">* Global variables for FFT Bin Example</span></div> |
| <div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div> |
| <div class="line">uint32_t <a name="a3"></a><a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a9b500899c581f6df3ffc0a9f3a9ef6aa">fftSize</a> = 1024;</div> |
| <div class="line">uint32_t <a name="a4"></a><a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a379ccb99013d369a41b49619083c16ef">ifftFlag</a> = 0;</div> |
| <div class="line">uint32_t <a name="a5"></a><a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a4d2e31c38e8172505e0a369a6898657d">doBitReverse</a> = 1;</div> |
| <div class="line"></div> |
| <div class="line"><span class="comment">/* Reference index at which max energy of bin ocuurs */</span></div> |
| <div class="line">uint32_t <a name="a6"></a><a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#aec50b0f697fd9e7e7e244487a4bd57e4">refIndex</a> = 213, <a name="a7"></a><a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a4a391651dbb95db35ccba70fc4f9e049">testIndex</a> = 0;</div> |
| <div class="line"></div> |
| <div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div> |
| <div class="line"><span class="comment">* Max magnitude FFT Bin test</span></div> |
| <div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div> |
| <div class="line"></div> |
| <div class="line">int32_t <a name="a8"></a><a class="code" href="_a_r_m_2arm__class__marks__example__f32_8c.html#a196718f834091385d38586a0ce4009dc">main</a>(<span class="keywordtype">void</span>)</div> |
| <div class="line">{</div> |
| <div class="line"></div> |
| <div class="line"> <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6" title="Error status returned by some functions in the library.">arm_status</a> <a name="a9"></a><a class="code" href="_a_r_m_2arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a>;</div> |
| <div class="line"> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> maxValue;</div> |
| <div class="line"></div> |
| <div class="line"> status = <a name="a10"></a><a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>;</div> |
| <div class="line"></div> |
| <div class="line"> <span class="comment">/* Process the data through the CFFT/CIFFT module */</span></div> |
| <div class="line"> <a name="a11"></a><a class="code" href="group___complex_f_f_t.html#gade0f9c4ff157b6b9c72a1eafd86ebf80" title="Processing function for the floating-point complex FFT.">arm_cfft_f32</a>(&<a name="a12"></a><a class="code" href="arm__const__structs_8c.html#a05abc294a9159abbd6ffb4f188fe18b1">arm_cfft_sR_f32_len1024</a>, <a class="code" href="_a_r_m_2arm__fft__bin__data_8c.html#a8a12a8ec4b866be84f4b7d3daf6a1242">testInput_f32_10khz</a>, <a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a379ccb99013d369a41b49619083c16ef">ifftFlag</a>, <a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a4d2e31c38e8172505e0a369a6898657d">doBitReverse</a>);</div> |
| <div class="line"></div> |
| <div class="line"> <span class="comment">/* Process the data through the Complex Magnitude Module for</span></div> |
| <div class="line"><span class="comment"> calculating the magnitude at each bin */</span></div> |
| <div class="line"> <a name="a13"></a><a class="code" href="group__cmplx__mag.html#gae45024c497392cde2ae358a76d435213" title="Floating-point complex magnitude.">arm_cmplx_mag_f32</a>(<a class="code" href="_a_r_m_2arm__fft__bin__data_8c.html#a8a12a8ec4b866be84f4b7d3daf6a1242">testInput_f32_10khz</a>, <a class="code" href="_a_r_m_2arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>, <a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a9b500899c581f6df3ffc0a9f3a9ef6aa">fftSize</a>);</div> |
| <div class="line"></div> |
| <div class="line"> <span class="comment">/* Calculates maxValue and returns corresponding BIN value */</span></div> |
| <div class="line"> <a name="a14"></a><a class="code" href="group___max.html#ga5b89d1b04575aeec494f678695fb87d8" title="Maximum value of a floating-point vector.">arm_max_f32</a>(<a class="code" href="_a_r_m_2arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>, <a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a9b500899c581f6df3ffc0a9f3a9ef6aa">fftSize</a>, &maxValue, &<a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a4a391651dbb95db35ccba70fc4f9e049">testIndex</a>);</div> |
| <div class="line"></div> |
| <div class="line"> <span class="keywordflow">if</span>(<a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#a4a391651dbb95db35ccba70fc4f9e049">testIndex</a> != <a class="code" href="_a_r_m_2arm__fft__bin__example__f32_8c.html#aec50b0f697fd9e7e7e244487a4bd57e4">refIndex</a>)</div> |
| <div class="line"> {</div> |
| <div class="line"> status = <a name="a15"></a><a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a09457f2be656b35015fd6d36202fa376">ARM_MATH_TEST_FAILURE</a>;</div> |
| <div class="line"> }</div> |
| <div class="line"></div> |
| <div class="line"> <span class="comment">/* ----------------------------------------------------------------------</span></div> |
| <div class="line"><span class="comment"> ** Loop here if the signals fail the PASS check.</span></div> |
| <div class="line"><span class="comment"> ** This denotes a test failure</span></div> |
| <div class="line"><span class="comment"> ** ------------------------------------------------------------------- */</span></div> |
| <div class="line"></div> |
| <div class="line"> <span class="keywordflow">if</span>( status != <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>)</div> |
| <div class="line"> {</div> |
| <div class="line"> <span class="keywordflow">while</span>(1);</div> |
| <div class="line"> }</div> |
| <div class="line"></div> |
| <div class="line"> <span class="keywordflow">while</span>(1); <span class="comment">/* main function does not return */</span></div> |
| <div class="line">}</div> |
| <div class="line"></div> |
| </div><!-- fragment --> </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 14:35:30 for CMSIS-DSP by ARM Ltd. All rights reserved. |
| <!-- |
| <a href="http://www.doxygen.org/index.html"> |
| <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.2 |
| --> |
| </li> |
| </ul> |
| </div> |
| </body> |
| </html> |