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<div class="header">
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<div class="headertitle"><div class="title">arm_fft_bin_example_f32.c</div></div>
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</div><!--header-->
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<div class="contents">
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<div class="fragment"><div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div>
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<div class="line"><span class="comment">* Copyright (C) 2010-2012 ARM Limited. All rights reserved.</span></div>
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<div class="line"><span class="comment">*</span></div>
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<div class="line"><span class="comment">* $Date: 17. January 2013</span></div>
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<div class="line"><span class="comment">* $Revision: V1.4.0</span></div>
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<div class="line"><span class="comment">*</span></div>
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<div class="line"><span class="comment">* Project: CMSIS DSP Library</span></div>
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<div class="line"><span class="comment">* Title: arm_fft_bin_example_f32.c</span></div>
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<div class="line"><span class="comment">*</span></div>
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<div class="line"><span class="comment">* Description: Example code demonstrating calculation of Max energy bin of</span></div>
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<div class="line"><span class="comment">* frequency domain of input signal.</span></div>
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<div class="line"><span class="comment">*</span></div>
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<div class="line"><span class="comment">* Target Processor: Cortex-M4/Cortex-M3</span></div>
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<div class="line"><span class="comment">*</span></div>
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<div class="line"><span class="comment">* Redistribution and use in source and binary forms, with or without</span></div>
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<div class="line"><span class="comment">* modification, are permitted provided that the following conditions</span></div>
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<div class="line"><span class="comment">* are met:</span></div>
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<div class="line"><span class="comment">* - Redistributions of source code must retain the above copyright</span></div>
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<div class="line"><span class="comment">* notice, this list of conditions and the following disclaimer.</span></div>
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<div class="line"><span class="comment">* - Redistributions in binary form must reproduce the above copyright</span></div>
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<div class="line"><span class="comment">* notice, this list of conditions and the following disclaimer in</span></div>
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<div class="line"><span class="comment">* the documentation and/or other materials provided with the</span></div>
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<div class="line"><span class="comment">* distribution.</span></div>
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<div class="line"><span class="comment">* - Neither the name of ARM LIMITED nor the names of its contributors</span></div>
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<div class="line"><span class="comment">* may be used to endorse or promote products derived from this</span></div>
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<div class="line"><span class="comment">* software without specific prior written permission.</span></div>
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<div class="line"><span class="comment">*</span></div>
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<div class="line"><span class="comment">* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span></div>
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<div class="line"><span class="comment">* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span></div>
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<div class="line"><span class="comment">* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div>
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<div class="line"><span class="comment">* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE</span></div>
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<div class="line"><span class="comment">* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,</span></div>
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<div class="line"><span class="comment">* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,</span></div>
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<div class="line"><span class="comment">* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;</span></div>
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<div class="line"><span class="comment">* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER</span></div>
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<div class="line"><span class="comment">* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT</span></div>
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<div class="line"><span class="comment">* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN</span></div>
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<div class="line"><span class="comment">* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE</span></div>
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<div class="line"><span class="comment">* POSSIBILITY OF SUCH DAMAGE.</span></div>
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<div class="line"><span class="comment"> * -------------------------------------------------------------------- */</span></div>
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<div class="line"> </div>
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<div class="line"><span class="preprocessor">#include "<a class="code" href="arm__math_8h.html">arm_math.h</a>"</span></div>
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<div class="line"><span class="preprocessor">#include "<a class="code" href="arm__const__structs_8h.html">arm_const_structs.h</a>"</span></div>
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<div class="line"> </div>
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<div class="line"><span class="preprocessor">#if defined(SEMIHOSTING)</span></div>
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<div class="line"><span class="preprocessor">#include <stdio.h></span></div>
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<div class="line"><span class="preprocessor">#endif</span></div>
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<div class="line"> </div>
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<div class="line"><span class="preprocessor">#define TEST_LENGTH_SAMPLES 2048</span></div>
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<div class="line"> </div>
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<div class="line"><span class="comment">/* -------------------------------------------------------------------</span></div>
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<div class="line"><span class="comment">* External Input and Output buffer Declarations for FFT Bin Example</span></div>
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<div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div>
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<div class="line"><span class="keyword">extern</span> <a class="code hl_typedef" href="arm__math__types_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a id="a0" name="a0"></a><a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a8a12a8ec4b866be84f4b7d3daf6a1242">testInput_f32_10khz</a>[<a id="a1" name="a1"></a><a class="code hl_define" href="arm__fft__bin__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>];</div>
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<div class="line"><span class="keyword">static</span> <a class="code hl_typedef" href="arm__math__types_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a class="code hl_variable" href="arm__dotproduct__example__f32_8c.html#a324833b61eae796082e07d078a67c34f">testOutput</a>[<a class="code hl_define" href="arm__fft__bin__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>/2];</div>
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<div class="line"> </div>
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<div class="line"><span class="comment">/* ------------------------------------------------------------------</span></div>
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<div class="line"><span class="comment">* Global variables for FFT Bin Example</span></div>
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<div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div>
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<div class="line">uint32_t <a id="a2" name="a2"></a><a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a9b500899c581f6df3ffc0a9f3a9ef6aa">fftSize</a> = 1024;</div>
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<div class="line">uint32_t <a id="a3" name="a3"></a><a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a379ccb99013d369a41b49619083c16ef">ifftFlag</a> = 0;</div>
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<div class="line">uint32_t <a id="a4" name="a4"></a><a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a4d2e31c38e8172505e0a369a6898657d">doBitReverse</a> = 1;</div>
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<div class="line"><a id="_a5" name="_a5"></a><a class="code hl_struct" href="structarm__cfft__instance__f32.html" title="Instance structure for the floating-point CFFT/CIFFT function.">arm_cfft_instance_f32</a> <a id="a6" name="a6"></a><a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a267b387963f2783aa103715c89a4341e">varInstCfftF32</a>;</div>
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<div class="line"> </div>
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<div class="line"><span class="comment">/* Reference index at which max energy of bin ocuurs */</span></div>
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<div class="line">uint32_t <a id="a7" name="a7"></a><a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#aec50b0f697fd9e7e7e244487a4bd57e4">refIndex</a> = 213, <a id="a8" name="a8"></a><a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a4a391651dbb95db35ccba70fc4f9e049">testIndex</a> = 0;</div>
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<div class="line"> </div>
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<div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div>
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<div class="line"><span class="comment">* Max magnitude FFT Bin test</span></div>
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<div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div>
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<div class="line"> </div>
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<div class="line">int32_t <a id="a9" name="a9"></a><a class="code hl_function" href="arm__fft__bin__example__f32_8c.html#a52d2cba30e6946c95578be946ac12a65">main</a>(<span class="keywordtype">void</span>)</div>
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<div class="line">{</div>
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<div class="line"> </div>
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<div class="line"> <a class="code hl_enumeration" href="arm__math__types_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6" title="Error status returned by some functions in the library.">arm_status</a> <a id="a10" name="a10"></a><a class="code hl_variable" href="arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a>;</div>
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<div class="line"> <a class="code hl_typedef" href="arm__math__types_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> maxValue;</div>
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<div class="line"> </div>
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<div class="line"> <a class="code hl_variable" href="arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a> = <a id="a11" name="a11"></a><a class="code hl_enumvalue" href="arm__math__types_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>;</div>
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<div class="line"> </div>
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<div class="line"> <a class="code hl_variable" href="arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a>=<a id="a12" name="a12"></a><a class="code hl_function" href="group__ComplexFFT.html#gae945cbeefda447a2f4b303a4ae6fa579" title="Initialization function for the cfft f32 function.">arm_cfft_init_f32</a>(&<a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a267b387963f2783aa103715c89a4341e">varInstCfftF32</a>,<a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a9b500899c581f6df3ffc0a9f3a9ef6aa">fftSize</a>);</div>
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<div class="line"> </div>
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<div class="line"> <span class="comment">/* Process the data through the CFFT/CIFFT module */</span></div>
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<div class="line"> <a id="a13" name="a13"></a><a class="code hl_function" href="group__ComplexFFT.html#gade0f9c4ff157b6b9c72a1eafd86ebf80" title="Processing function for the floating-point complex FFT.">arm_cfft_f32</a>(&<a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a267b387963f2783aa103715c89a4341e">varInstCfftF32</a>, <a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a8a12a8ec4b866be84f4b7d3daf6a1242">testInput_f32_10khz</a>, <a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a379ccb99013d369a41b49619083c16ef">ifftFlag</a>, <a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a4d2e31c38e8172505e0a369a6898657d">doBitReverse</a>);</div>
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<div class="line"> </div>
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<div class="line"> <span class="comment">/* Process the data through the Complex Magnitude Module for</span></div>
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<div class="line"><span class="comment"> calculating the magnitude at each bin */</span></div>
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<div class="line"> <a id="a14" name="a14"></a><a class="code hl_function" href="group__cmplx__mag.html#gaba4e0eff7816fe80d01121fb4cf6c6bc" title="Floating-point complex magnitude.">arm_cmplx_mag_f32</a>(<a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a8a12a8ec4b866be84f4b7d3daf6a1242">testInput_f32_10khz</a>, <a class="code hl_variable" href="arm__dotproduct__example__f32_8c.html#a324833b61eae796082e07d078a67c34f">testOutput</a>, <a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a9b500899c581f6df3ffc0a9f3a9ef6aa">fftSize</a>);</div>
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<div class="line"> </div>
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<div class="line"> <span class="comment">/* Calculates maxValue and returns corresponding BIN value */</span></div>
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<div class="line"> <a id="a15" name="a15"></a><a class="code hl_function" href="group__Max.html#gad1eabd31544fe59c414d9ce5bd0cc151" title="Maximum value of a floating-point vector.">arm_max_f32</a>(<a class="code hl_variable" href="arm__dotproduct__example__f32_8c.html#a324833b61eae796082e07d078a67c34f">testOutput</a>, <a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a9b500899c581f6df3ffc0a9f3a9ef6aa">fftSize</a>, &maxValue, &<a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a4a391651dbb95db35ccba70fc4f9e049">testIndex</a>);</div>
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<div class="line"> </div>
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|
<div class="line"> <a class="code hl_variable" href="arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a> = (<a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#a4a391651dbb95db35ccba70fc4f9e049">testIndex</a> != <a class="code hl_variable" href="arm__fft__bin__example__f32_8c.html#aec50b0f697fd9e7e7e244487a4bd57e4">refIndex</a>) ? <a id="a16" name="a16"></a><a class="code hl_enumvalue" href="arm__math__types_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a09457f2be656b35015fd6d36202fa376">ARM_MATH_TEST_FAILURE</a> : <a class="code hl_enumvalue" href="arm__math__types_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>;</div>
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<div class="line"> </div>
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<div class="line"> <span class="keywordflow">if</span> (<a class="code hl_variable" href="arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a> != <a class="code hl_enumvalue" href="arm__math__types_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>)</div>
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<div class="line"> {</div>
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<div class="line"><span class="preprocessor">#if defined (SEMIHOSTING)</span></div>
|
|
<div class="line"> printf(<span class="stringliteral">"FAILURE\n"</span>);</div>
|
|
<div class="line"><span class="preprocessor">#else</span></div>
|
|
<div class="line"> <span class="keywordflow">while</span> (1); <span class="comment">/* main function does not return */</span></div>
|
|
<div class="line"><span class="preprocessor">#endif</span></div>
|
|
<div class="line"> }</div>
|
|
<div class="line"> <span class="keywordflow">else</span></div>
|
|
<div class="line"> {</div>
|
|
<div class="line"><span class="preprocessor">#if defined (SEMIHOSTING)</span></div>
|
|
<div class="line"> printf(<span class="stringliteral">"SUCCESS\n"</span>);</div>
|
|
<div class="line"><span class="preprocessor">#else</span></div>
|
|
<div class="line"> <span class="keywordflow">while</span> (1); <span class="comment">/* main function does not return */</span></div>
|
|
<div class="line"><span class="preprocessor">#endif</span></div>
|
|
<div class="line"> }</div>
|
|
<div class="line">}</div>
|
|
<div class="line"> </div>
|
|
</div><!-- fragment --> </div><!-- contents -->
|
|
</div><!-- doc-content -->
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|
<!-- start footer part -->
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<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
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<ul>
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<li class="footer">
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<script type="text/javascript">
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|
<!--
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|
writeFooter.call(this);
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|
//-->
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</script>
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</li>
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</ul>
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</div>
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</body>
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</html>
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