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  50 <h1>arm_linear_interp_example_f32.c</h1>  </div>
  51 </div>
  52 <div class="contents">
  53 <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>
  54 <a name="l00002"></a>00002 <span class="comment">* Copyright (C) 2010 ARM Limited. All rights reserved.   </span>
  55 <a name="l00003"></a>00003 <span class="comment">*  </span>
  56 <a name="l00004"></a>00004 <span class="comment">* $Date:        29. November 2010  </span>
  57 <a name="l00005"></a>00005 <span class="comment">* $Revision:    V1.0.3 </span>
  58 <a name="l00006"></a>00006 <span class="comment">*  </span>
  59 <a name="l00007"></a>00007 <span class="comment">* Project:      CMSIS DSP Library  </span>
  60 <a name="l00008"></a>00008 <span class="comment">* Title:        arm_linear_interp_example_f32.c       </span>
  61 <a name="l00009"></a>00009 <span class="comment">*  </span>
  62 <a name="l00010"></a>00010 <span class="comment">* Description:  Example code demonstrating usage of sin function  </span>
  63 <a name="l00011"></a>00011 <span class="comment">*               and uses linear interpolation to get higher precision </span>
  64 <a name="l00012"></a>00012 <span class="comment">*                </span>
  65 <a name="l00013"></a>00013 <span class="comment">* Target Processor: Cortex-M4/Cortex-M3  </span>
  66 <a name="l00014"></a>00014 <span class="comment">*</span>
  67 <a name="l00015"></a>00015 <span class="comment">*</span>
  68 <a name="l00016"></a>00016 <span class="comment">* Version 1.0.3 2010/11/29 </span>
  69 <a name="l00017"></a>00017 <span class="comment">*    Re-organized the CMSIS folders and updated documentation. </span>
  70 <a name="l00018"></a>00018 <span class="comment">* </span>
  71 <a name="l00019"></a>00019 <span class="comment">* Version 1.0.1 2010/10/05 KK </span>
  72 <a name="l00020"></a>00020 <span class="comment">*    Production release and review comments incorporated.  </span>
  73 <a name="l00021"></a>00021 <span class="comment">*</span>
  74 <a name="l00022"></a>00022 <span class="comment">* Version 1.0.0 2010/09/20 KK</span>
  75 <a name="l00023"></a>00023 <span class="comment">*    Production release and review comments incorporated.</span>
  76 <a name="l00024"></a>00024 <span class="comment">* ------------------------------------------------------------------- */</span>
  77 <a name="l00025"></a>00025
  78 <a name="l00070"></a>00070 <span class="preprocessor">#include &quot;<a class="code" href="arm__math_8h.html">arm_math.h</a>&quot;</span>
  79 <a name="l00071"></a>00071 <span class="preprocessor">#include &quot;math_helper.h&quot;</span>
  80 <a name="l00072"></a>00072
  81 <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>
  82 <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>
  83 <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>
  84 <a name="l00076"></a>00076 <span class="preprocessor"></span>
  85 <a name="l00077"></a>00077 <span class="comment">/* ---------------------------------------------------------------------- </span>
  86 <a name="l00078"></a>00078 <span class="comment">* Test input data for F32 SIN function </span>
  87 <a name="l00079"></a>00079 <span class="comment">* Generated by the MATLAB rand() function </span>
  88 <a name="l00080"></a>00080 <span class="comment">* randn(&#39;state&#39;, 0)</span>
  89 <a name="l00081"></a>00081 <span class="comment">* xi = (((1/4.18318581819710)* randn(blockSize, 1) * 2* pi));</span>
  90 <a name="l00082"></a>00082 <span class="comment">* --------------------------------------------------------------------*/</span>
  91 <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>] =
  92 <a name="l00084"></a>00084 {
  93 <a name="l00085"></a>00085     -0.649716504673081170,  -2.501723745497831200,  0.188250329003310100,   0.432092748487532540,   -1.722010988459680800,  1.788766476323060600,   1.786136060975809500,   -0.056525543169408797,
  94 <a name="l00086"></a>00086     0.491596272728153760,   0.262309671126153390
  95 <a name="l00087"></a>00087 };
  96 <a name="l00088"></a>00088
  97 <a name="l00089"></a>00089 <span class="comment">/*------------------------------------------------------------------------------ </span>
  98 <a name="l00090"></a>00090 <span class="comment">*  Reference out of SIN F32 function for Block Size = 10  </span>
  99 <a name="l00091"></a>00091 <span class="comment">*  Calculated from sin(testInputSin_f32) </span>
 100 <a name="l00092"></a>00092 <span class="comment">*------------------------------------------------------------------------------*/</span>
 101 <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>] =
 102 <a name="l00094"></a>00094 {
 103 <a name="l00095"></a>00095     -0.604960695383043530,  -0.597090287967934840,  0.187140422442966500,   0.418772124875992690,   -0.988588831792106880,  0.976338412038794010,   0.976903856413481100,   -0.056495446835214236,
 104 <a name="l00096"></a>00096     0.472033731854734240,   0.259311907228582830
 105 <a name="l00097"></a>00097 };
 106 <a name="l00098"></a>00098
 107 <a name="l00099"></a>00099 <span class="comment">/*------------------------------------------------------------------------------ </span>
 108 <a name="l00100"></a>00100 <span class="comment">*  Method 1: Test out Buffer Calculated from Cubic Interpolation </span>
 109 <a name="l00101"></a>00101 <span class="comment">*------------------------------------------------------------------------------*/</span>
 110 <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>];
 111 <a name="l00103"></a>00103
 112 <a name="l00104"></a>00104 <span class="comment">/*------------------------------------------------------------------------------ </span>
 113 <a name="l00105"></a>00105 <span class="comment">*  Method 2: Test out buffer Calculated from Linear Interpolation </span>
 114 <a name="l00106"></a>00106 <span class="comment">*------------------------------------------------------------------------------*/</span>
 115 <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>];
 116 <a name="l00108"></a>00108
 117 <a name="l00109"></a>00109 <span class="comment">/*------------------------------------------------------------------------------ </span>
 118 <a name="l00110"></a>00110 <span class="comment">*  External table used for linear interpolation </span>
 119 <a name="l00111"></a>00111 <span class="comment">*------------------------------------------------------------------------------*/</span>
 120 <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];
 121 <a name="l00113"></a>00113
 122 <a name="l00114"></a>00114 <span class="comment">/* ---------------------------------------------------------------------- </span>
 123 <a name="l00115"></a>00115 <span class="comment">* Global Variables for caluclating SNR&#39;s for Method1 &amp; Method 2 </span>
 124 <a name="l00116"></a>00116 <span class="comment">* ------------------------------------------------------------------- */</span>
 125 <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>;
 126 <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>;
 127 <a name="l00119"></a>00119
 128 <a name="l00120"></a>00120 <span class="comment">/* ---------------------------------------------------------------------------- </span>
 129 <a name="l00121"></a>00121 <span class="comment">* Calculation of Sine values from Cubic Interpolation and Linear interpolation </span>
 130 <a name="l00122"></a>00122 <span class="comment">* ---------------------------------------------------------------------------- */</span>
 131 <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>)
 132 <a name="l00124"></a>00124 {
 133 <a name="l00125"></a>00125     uint32_t i;
 134 <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>;
 135 <a name="l00127"></a>00127
 136 <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>, &amp;<a class="code" href="arm__linear__interp__example__f32_8c.html#a04ff02547b481a95c28064b89f5d6763">arm_linear_interep_table</a>[0]};
 137 <a name="l00129"></a>00129
 138 <a name="l00130"></a>00130     <span class="comment">/*------------------------------------------------------------------------------ </span>
 139 <a name="l00131"></a>00131 <span class="comment">    *  Method 1: Test out Calculated from Cubic Interpolation </span>
 140 <a name="l00132"></a>00132 <span class="comment">    *------------------------------------------------------------------------------*/</span>
 141 <a name="l00133"></a>00133     <span class="keywordflow">for</span>(i=0; i&lt; <a class="code" href="arm__linear__interp__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>; i++)
 142 <a name="l00134"></a>00134     {
 143 <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]);
 144 <a name="l00136"></a>00136     }
 145 <a name="l00137"></a>00137
 146 <a name="l00138"></a>00138     <span class="comment">/*------------------------------------------------------------------------------ </span>
 147 <a name="l00139"></a>00139 <span class="comment">    *  Method 2: Test out Calculated from Cubic Interpolation and Linear interpolation </span>
 148 <a name="l00140"></a>00140 <span class="comment">    *------------------------------------------------------------------------------*/</span>
 149 <a name="l00141"></a>00141
 150 <a name="l00142"></a>00142     <span class="keywordflow">for</span>(i=0; i&lt; <a class="code" href="arm__linear__interp__example__f32_8c.html#abc004a7fade488e72310fd96c0a101dc">TEST_LENGTH_SAMPLES</a>; i++)
 151 <a name="l00143"></a>00143     {
 152 <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>(&amp;S, <a class="code" href="arm__linear__interp__example__f32_8c.html#a4be0c4d25e63ce04b8cc8ad070805287">testInputSin_f32</a>[i]);
 153 <a name="l00145"></a>00145     }
 154 <a name="l00146"></a>00146
 155 <a name="l00147"></a>00147     <span class="comment">/*------------------------------------------------------------------------------ </span>
 156 <a name="l00148"></a>00148 <span class="comment">    *                   SNR calculation for method 1 </span>
 157 <a name="l00149"></a>00149 <span class="comment">    *------------------------------------------------------------------------------*/</span>
 158 <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);
 159 <a name="l00151"></a>00151
 160 <a name="l00152"></a>00152     <span class="comment">/*------------------------------------------------------------------------------ </span>
 161 <a name="l00153"></a>00153 <span class="comment">    *                   SNR calculation for method 2 </span>
 162 <a name="l00154"></a>00154 <span class="comment">    *------------------------------------------------------------------------------*/</span>
 163 <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);
 164 <a name="l00156"></a>00156
 165 <a name="l00157"></a>00157     <span class="comment">/*------------------------------------------------------------------------------ </span>
 166 <a name="l00158"></a>00158 <span class="comment">    *                   Initialise status depending on SNR calculations </span>
 167 <a name="l00159"></a>00159 <span class="comment">    *------------------------------------------------------------------------------*/</span>
 168 <a name="l00160"></a>00160     <span class="keywordflow">if</span>( <a class="code" href="arm__linear__interp__example__f32_8c.html#a269948ab25f230d33e3f22eab85aa1cf">snr2</a> &gt; <a class="code" href="arm__linear__interp__example__f32_8c.html#ad492c21cf2dd4e9199ae46c77f812cbc">snr1</a>)
 169 <a name="l00161"></a>00161     {
 170 <a name="l00162"></a>00162         status = <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>;
 171 <a name="l00163"></a>00163     }
 172 <a name="l00164"></a>00164     <span class="keywordflow">else</span>
 173 <a name="l00165"></a>00165     {
 174 <a name="l00166"></a>00166         status = <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a09457f2be656b35015fd6d36202fa376">ARM_MATH_TEST_FAILURE</a>;
 175 <a name="l00167"></a>00167     }
 176 <a name="l00168"></a>00168
 177 <a name="l00169"></a>00169     <span class="comment">/* ---------------------------------------------------------------------- </span>
 178 <a name="l00170"></a>00170 <span class="comment">    ** Loop here if the signals fail the PASS check. </span>
 179 <a name="l00171"></a>00171 <span class="comment">    ** This denotes a test failure </span>
 180 <a name="l00172"></a>00172 <span class="comment">    ** ------------------------------------------------------------------- */</span>
 181 <a name="l00173"></a>00173     <span class="keywordflow">if</span>( status != <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>)
 182 <a name="l00174"></a>00174     {
 183 <a name="l00175"></a>00175         <span class="keywordflow">while</span>(1);
 184 <a name="l00176"></a>00176     }
 185 <a name="l00177"></a>00177 }
 186 <a name="l00178"></a>00178
 187 </pre></div></div>
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