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| <h1>arm_linear_interp_example_f32.c</h1> </div> |
| </div> |
| <div class="contents"> |
| <a href="arm__linear__interp__example__f32_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* ---------------------------------------------------------------------- </span> |
| <a name="l00002"></a>00002 <span class="comment">* Copyright (C) 2010 ARM Limited. All rights reserved. </span> |
| <a name="l00003"></a>00003 <span class="comment">* </span> |
| <a name="l00004"></a>00004 <span class="comment">* $Date: 29. November 2010 </span> |
| <a name="l00005"></a>00005 <span class="comment">* $Revision: V1.0.3 </span> |
| <a name="l00006"></a>00006 <span class="comment">* </span> |
| <a name="l00007"></a>00007 <span class="comment">* Project: CMSIS DSP Library </span> |
| <a name="l00008"></a>00008 <span class="comment">* Title: arm_linear_interp_example_f32.c </span> |
| <a name="l00009"></a>00009 <span class="comment">* </span> |
| <a name="l00010"></a>00010 <span class="comment">* Description: Example code demonstrating usage of sin function </span> |
| <a name="l00011"></a>00011 <span class="comment">* and uses linear interpolation to get higher precision </span> |
| <a name="l00012"></a>00012 <span class="comment">* </span> |
| <a name="l00013"></a>00013 <span class="comment">* Target Processor: Cortex-M4/Cortex-M3 </span> |
| <a name="l00014"></a>00014 <span class="comment">*</span> |
| <a name="l00015"></a>00015 <span class="comment">*</span> |
| <a name="l00016"></a>00016 <span class="comment">* Version 1.0.3 2010/11/29 </span> |
| <a name="l00017"></a>00017 <span class="comment">* Re-organized the CMSIS folders and updated documentation. </span> |
| <a name="l00018"></a>00018 <span class="comment">* </span> |
| <a name="l00019"></a>00019 <span class="comment">* Version 1.0.1 2010/10/05 KK </span> |
| <a name="l00020"></a>00020 <span class="comment">* Production release and review comments incorporated. </span> |
| <a name="l00021"></a>00021 <span class="comment">*</span> |
| <a name="l00022"></a>00022 <span class="comment">* Version 1.0.0 2010/09/20 KK</span> |
| <a name="l00023"></a>00023 <span class="comment">* Production release and review comments incorporated.</span> |
| <a name="l00024"></a>00024 <span class="comment">* ------------------------------------------------------------------- */</span> |
| <a name="l00025"></a>00025 |
| <a name="l00070"></a>00070 <span class="preprocessor">#include "<a class="code" href="arm__math_8h.html">arm_math.h</a>"</span> |
| <a name="l00071"></a>00071 <span class="preprocessor">#include "math_helper.h"</span> |
| <a name="l00072"></a>00072 |
| <a name="l00073"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#af08ec3fef897d77c6817638bf0e0c5c6">00073</a> <span class="preprocessor">#define SNR_THRESHOLD 90 </span> |
| <a name="l00074"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">00074</a> <span class="preprocessor"></span><span class="preprocessor">#define TEST_LENGTH_SAMPLES 10 </span> |
| <a name="l00075"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#a0ecae49cebd837aac53411c8f877503d">00075</a> <span class="preprocessor"></span><span class="preprocessor">#define XSPACING (0.00005f)</span> |
| <a name="l00076"></a>00076 <span class="preprocessor"></span> |
| <a name="l00077"></a>00077 <span class="comment">/* ---------------------------------------------------------------------- </span> |
| <a name="l00078"></a>00078 <span class="comment">* Test input data for F32 SIN function </span> |
| <a name="l00079"></a>00079 <span class="comment">* Generated by the MATLAB rand() function </span> |
| <a name="l00080"></a>00080 <span class="comment">* randn('state', 0)</span> |
| <a name="l00081"></a>00081 <span class="comment">* xi = (((1/4.18318581819710)* randn(blockSize, 1) * 2* pi));</span> |
| <a name="l00082"></a>00082 <span class="comment">* --------------------------------------------------------------------*/</span> |
| <a name="l00083"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#a4be0c4d25e63ce04b8cc8ad070805287">00083</a> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a class="code" href="arm__linear__interp__example__f32_8c.html#a4be0c4d25e63ce04b8cc8ad070805287">testInputSin_f32</a>[<a class="code" href="arm__linear__interp__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>] = |
| <a name="l00084"></a>00084 { |
| <a name="l00085"></a>00085 -0.649716504673081170, -2.501723745497831200, 0.188250329003310100, 0.432092748487532540, -1.722010988459680800, 1.788766476323060600, 1.786136060975809500, -0.056525543169408797, |
| <a name="l00086"></a>00086 0.491596272728153760, 0.262309671126153390 |
| <a name="l00087"></a>00087 }; |
| <a name="l00088"></a>00088 |
| <a name="l00089"></a>00089 <span class="comment">/*------------------------------------------------------------------------------ </span> |
| <a name="l00090"></a>00090 <span class="comment">* Reference out of SIN F32 function for Block Size = 10 </span> |
| <a name="l00091"></a>00091 <span class="comment">* Calculated from sin(testInputSin_f32) </span> |
| <a name="l00092"></a>00092 <span class="comment">*------------------------------------------------------------------------------*/</span> |
| <a name="l00093"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#a5a33218d422603f3e5267b6984bdddd1">00093</a> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a class="code" href="arm__linear__interp__example__f32_8c.html#a5a33218d422603f3e5267b6984bdddd1">testRefSinOutput32_f32</a>[<a class="code" href="arm__linear__interp__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>] = |
| <a name="l00094"></a>00094 { |
| <a name="l00095"></a>00095 -0.604960695383043530, -0.597090287967934840, 0.187140422442966500, 0.418772124875992690, -0.988588831792106880, 0.976338412038794010, 0.976903856413481100, -0.056495446835214236, |
| <a name="l00096"></a>00096 0.472033731854734240, 0.259311907228582830 |
| <a name="l00097"></a>00097 }; |
| <a name="l00098"></a>00098 |
| <a name="l00099"></a>00099 <span class="comment">/*------------------------------------------------------------------------------ </span> |
| <a name="l00100"></a>00100 <span class="comment">* Method 1: Test out Buffer Calculated from Cubic Interpolation </span> |
| <a name="l00101"></a>00101 <span class="comment">*------------------------------------------------------------------------------*/</span> |
| <a name="l00102"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">00102</a> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a class="code" href="arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>[<a class="code" href="arm__linear__interp__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>]; |
| <a name="l00103"></a>00103 |
| <a name="l00104"></a>00104 <span class="comment">/*------------------------------------------------------------------------------ </span> |
| <a name="l00105"></a>00105 <span class="comment">* Method 2: Test out buffer Calculated from Linear Interpolation </span> |
| <a name="l00106"></a>00106 <span class="comment">*------------------------------------------------------------------------------*/</span> |
| <a name="l00107"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#a8ca7d0ad6e04efed464bcaacedacf925">00107</a> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a class="code" href="arm__linear__interp__example__f32_8c.html#a8ca7d0ad6e04efed464bcaacedacf925">testLinIntOutput</a>[<a class="code" href="arm__linear__interp__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>]; |
| <a name="l00108"></a>00108 |
| <a name="l00109"></a>00109 <span class="comment">/*------------------------------------------------------------------------------ </span> |
| <a name="l00110"></a>00110 <span class="comment">* External table used for linear interpolation </span> |
| <a name="l00111"></a>00111 <span class="comment">*------------------------------------------------------------------------------*/</span> |
| <a name="l00112"></a>00112 <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 class="code" href="arm__linear__interp__example__f32_8c.html#a04ff02547b481a95c28064b89f5d6763">arm_linear_interep_table</a>[188495]; |
| <a name="l00113"></a>00113 |
| <a name="l00114"></a>00114 <span class="comment">/* ---------------------------------------------------------------------- </span> |
| <a name="l00115"></a>00115 <span class="comment">* Global Variables for caluclating SNR's for Method1 & Method 2 </span> |
| <a name="l00116"></a>00116 <span class="comment">* ------------------------------------------------------------------- */</span> |
| <a name="l00117"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#ad492c21cf2dd4e9199ae46c77f812cbc">00117</a> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a class="code" href="arm__linear__interp__example__f32_8c.html#ad492c21cf2dd4e9199ae46c77f812cbc">snr1</a>; |
| <a name="l00118"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#a269948ab25f230d33e3f22eab85aa1cf">00118</a> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a class="code" href="arm__linear__interp__example__f32_8c.html#a269948ab25f230d33e3f22eab85aa1cf">snr2</a>; |
| <a name="l00119"></a>00119 |
| <a name="l00120"></a>00120 <span class="comment">/* ---------------------------------------------------------------------------- </span> |
| <a name="l00121"></a>00121 <span class="comment">* Calculation of Sine values from Cubic Interpolation and Linear interpolation </span> |
| <a name="l00122"></a>00122 <span class="comment">* ---------------------------------------------------------------------------- */</span> |
| <a name="l00123"></a><a class="code" href="arm__linear__interp__example__f32_8c.html#a52d2cba30e6946c95578be946ac12a65">00123</a> int32_t <a class="code" href="arm__class__marks__example__f32_8c.html#a196718f834091385d38586a0ce4009dc">main</a>(<span class="keywordtype">void</span>) |
| <a name="l00124"></a>00124 { |
| <a name="l00125"></a>00125 uint32_t i; |
| <a name="l00126"></a>00126 <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6" title="Error status returned by some functions in the library.">arm_status</a> <a class="code" href="arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a>; |
| <a name="l00127"></a>00127 |
| <a name="l00128"></a>00128 <a class="code" href="structarm__linear__interp__instance__f32.html" title="Instance structure for the floating-point Linear Interpolate function.">arm_linear_interp_instance_f32</a> S = {188495, -3.141592653589793238, <a class="code" href="arm__linear__interp__example__f32_8c.html#a0ecae49cebd837aac53411c8f877503d">XSPACING</a>, &<a class="code" href="arm__linear__interp__example__f32_8c.html#a04ff02547b481a95c28064b89f5d6763">arm_linear_interep_table</a>[0]}; |
| <a name="l00129"></a>00129 |
| <a name="l00130"></a>00130 <span class="comment">/*------------------------------------------------------------------------------ </span> |
| <a name="l00131"></a>00131 <span class="comment"> * Method 1: Test out Calculated from Cubic Interpolation </span> |
| <a name="l00132"></a>00132 <span class="comment"> *------------------------------------------------------------------------------*/</span> |
| <a name="l00133"></a>00133 <span class="keywordflow">for</span>(i=0; i< <a class="code" href="arm__linear__interp__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>; i++) |
| <a name="l00134"></a>00134 { |
| <a name="l00135"></a>00135 <a class="code" href="arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>[i] = <a class="code" href="group__sin.html#gae164899c4a3fc0e946dc5d55555fe541" title="Fast approximation to the trigonometric sine function for floating-point data.">arm_sin_f32</a>(<a class="code" href="arm__linear__interp__example__f32_8c.html#a4be0c4d25e63ce04b8cc8ad070805287">testInputSin_f32</a>[i]); |
| <a name="l00136"></a>00136 } |
| <a name="l00137"></a>00137 |
| <a name="l00138"></a>00138 <span class="comment">/*------------------------------------------------------------------------------ </span> |
| <a name="l00139"></a>00139 <span class="comment"> * Method 2: Test out Calculated from Cubic Interpolation and Linear interpolation </span> |
| <a name="l00140"></a>00140 <span class="comment"> *------------------------------------------------------------------------------*/</span> |
| <a name="l00141"></a>00141 |
| <a name="l00142"></a>00142 <span class="keywordflow">for</span>(i=0; i< <a class="code" href="arm__linear__interp__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>; i++) |
| <a name="l00143"></a>00143 { |
| <a name="l00144"></a>00144 <a class="code" href="arm__linear__interp__example__f32_8c.html#a8ca7d0ad6e04efed464bcaacedacf925">testLinIntOutput</a>[i] = <a class="code" href="group___linear_interpolate.html#ga2269263d810cafcd19681957b37d5cf6" title="Process function for the floating-point Linear Interpolation Function.">arm_linear_interp_f32</a>(&S, <a class="code" href="arm__linear__interp__example__f32_8c.html#a4be0c4d25e63ce04b8cc8ad070805287">testInputSin_f32</a>[i]); |
| <a name="l00145"></a>00145 } |
| <a name="l00146"></a>00146 |
| <a name="l00147"></a>00147 <span class="comment">/*------------------------------------------------------------------------------ </span> |
| <a name="l00148"></a>00148 <span class="comment"> * SNR calculation for method 1 </span> |
| <a name="l00149"></a>00149 <span class="comment"> *------------------------------------------------------------------------------*/</span> |
| <a name="l00150"></a>00150 <a class="code" href="arm__linear__interp__example__f32_8c.html#ad492c21cf2dd4e9199ae46c77f812cbc">snr1</a> = arm_snr_f32(<a class="code" href="arm__linear__interp__example__f32_8c.html#a5a33218d422603f3e5267b6984bdddd1">testRefSinOutput32_f32</a>, <a class="code" href="arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>, 2); |
| <a name="l00151"></a>00151 |
| <a name="l00152"></a>00152 <span class="comment">/*------------------------------------------------------------------------------ </span> |
| <a name="l00153"></a>00153 <span class="comment"> * SNR calculation for method 2 </span> |
| <a name="l00154"></a>00154 <span class="comment"> *------------------------------------------------------------------------------*/</span> |
| <a name="l00155"></a>00155 <a class="code" href="arm__linear__interp__example__f32_8c.html#a269948ab25f230d33e3f22eab85aa1cf">snr2</a> = arm_snr_f32(<a class="code" href="arm__linear__interp__example__f32_8c.html#a5a33218d422603f3e5267b6984bdddd1">testRefSinOutput32_f32</a>, <a class="code" href="arm__linear__interp__example__f32_8c.html#a8ca7d0ad6e04efed464bcaacedacf925">testLinIntOutput</a>, 2); |
| <a name="l00156"></a>00156 |
| <a name="l00157"></a>00157 <span class="comment">/*------------------------------------------------------------------------------ </span> |
| <a name="l00158"></a>00158 <span class="comment"> * Initialise status depending on SNR calculations </span> |
| <a name="l00159"></a>00159 <span class="comment"> *------------------------------------------------------------------------------*/</span> |
| <a name="l00160"></a>00160 <span class="keywordflow">if</span>( <a class="code" href="arm__linear__interp__example__f32_8c.html#a269948ab25f230d33e3f22eab85aa1cf">snr2</a> > <a class="code" href="arm__linear__interp__example__f32_8c.html#ad492c21cf2dd4e9199ae46c77f812cbc">snr1</a>) |
| <a name="l00161"></a>00161 { |
| <a name="l00162"></a>00162 status = <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>; |
| <a name="l00163"></a>00163 } |
| <a name="l00164"></a>00164 <span class="keywordflow">else</span> |
| <a name="l00165"></a>00165 { |
| <a name="l00166"></a>00166 status = <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a09457f2be656b35015fd6d36202fa376">ARM_MATH_TEST_FAILURE</a>; |
| <a name="l00167"></a>00167 } |
| <a name="l00168"></a>00168 |
| <a name="l00169"></a>00169 <span class="comment">/* ---------------------------------------------------------------------- </span> |
| <a name="l00170"></a>00170 <span class="comment"> ** Loop here if the signals fail the PASS check. </span> |
| <a name="l00171"></a>00171 <span class="comment"> ** This denotes a test failure </span> |
| <a name="l00172"></a>00172 <span class="comment"> ** ------------------------------------------------------------------- */</span> |
| <a name="l00173"></a>00173 <span class="keywordflow">if</span>( status != <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>) |
| <a name="l00174"></a>00174 { |
| <a name="l00175"></a>00175 <span class="keywordflow">while</span>(1); |
| <a name="l00176"></a>00176 } |
| <a name="l00177"></a>00177 } |
| <a name="l00178"></a>00178 |
| </pre></div></div> |
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