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arm_variance_example_f32_8c-example.html

arm_variance_example_f32_8c-example.html 24 KB
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  111. <div class="title">arm_variance_example_f32.c</div>  </div>
    112. 

  112. </div><!--header-->
    113. 

  113. <div class="contents">
    114. 

  114. <div class="fragment"><div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div>
    115. 

  115. <div class="line"><span class="comment">* Copyright (C) 2010-2012 ARM Limited. All rights reserved.</span></div>
    116. 

  116. <div class="line"><span class="comment">*</span></div>
    117. 

  117. <div class="line"><span class="comment">* $Date:         17. January 2013</span></div>
    118. 

  118. <div class="line"><span class="comment">* $Revision:     V1.4.0</span></div>
    119. 

  119. <div class="line"><span class="comment">*</span></div>
    120. 

  120. <div class="line"><span class="comment">* Project:       CMSIS DSP Library</span></div>
    121. 

  121. <div class="line"><span class="comment">* Title:         arm_variance_example_f32.c</span></div>
    122. 

  122. <div class="line"><span class="comment">*</span></div>
    123. 

  123. <div class="line"><span class="comment">* Description:   Example code demonstrating variance calculation of input sequence.</span></div>
    124. 

  124. <div class="line"><span class="comment">*</span></div>
    125. 

  125. <div class="line"><span class="comment">* Target Processor: Cortex-M4/Cortex-M3</span></div>
    126. 

  126. <div class="line"><span class="comment">*</span></div>
    127. 

  127. <div class="line"><span class="comment">* Redistribution and use in source and binary forms, with or without</span></div>
    128. 

  128. <div class="line"><span class="comment">* modification, are permitted provided that the following conditions</span></div>
    129. 

  129. <div class="line"><span class="comment">* are met:</span></div>
    130. 

  130. <div class="line"><span class="comment">*   - Redistributions of source code must retain the above copyright</span></div>
    131. 

  131. <div class="line"><span class="comment">*     notice, this list of conditions and the following disclaimer.</span></div>
    132. 

  132. <div class="line"><span class="comment">*   - Redistributions in binary form must reproduce the above copyright</span></div>
    133. 

  133. <div class="line"><span class="comment">*     notice, this list of conditions and the following disclaimer in</span></div>
    134. 

  134. <div class="line"><span class="comment">*     the documentation and/or other materials provided with the</span></div>
    135. 

  135. <div class="line"><span class="comment">*     distribution.</span></div>
    136. 

  136. <div class="line"><span class="comment">*   - Neither the name of ARM LIMITED nor the names of its contributors</span></div>
    137. 

  137. <div class="line"><span class="comment">*     may be used to endorse or promote products derived from this</span></div>
    138. 

  138. <div class="line"><span class="comment">*     software without specific prior written permission.</span></div>
    139. 

  139. <div class="line"><span class="comment">*</span></div>
    140. 

  140. <div class="line"><span class="comment">* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span></div>
    141. 

  141. <div class="line"><span class="comment">* &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span></div>
    142. 

  142. <div class="line"><span class="comment">* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div>
    143. 

  143. <div class="line"><span class="comment">* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE</span></div>
    144. 

  144. <div class="line"><span class="comment">* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,</span></div>
    145. 

  145. <div class="line"><span class="comment">* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,</span></div>
    146. 

  146. <div class="line"><span class="comment">* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;</span></div>
    147. 

  147. <div class="line"><span class="comment">* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER</span></div>
    148. 

  148. <div class="line"><span class="comment">* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT</span></div>
    149. 

  149. <div class="line"><span class="comment">* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN</span></div>
    150. 

  150. <div class="line"><span class="comment">* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE</span></div>
    151. 

  151. <div class="line"><span class="comment">* POSSIBILITY OF SUCH DAMAGE.</span></div>
    152. 

  152. <div class="line"><span class="comment">* -------------------------------------------------------------------- */</span></div>
    153. 

  153. <div class="line"></div>
    154. 

  154. <div class="line"><span class="preprocessor">#include &lt;math.h&gt;</span></div>
    155. 

  155. <div class="line"><span class="preprocessor">#include &quot;<a class="code" href="arm__math_8h.html">arm_math.h</a>&quot;</span></div>
    156. 

  156. <div class="line"></div>
    157. 

  157. <div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div>
    158. 

  158. <div class="line"><span class="comment">* Defines each of the tests performed</span></div>
    159. 

  159. <div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div>
    160. 

  160. <div class="line"><span class="preprocessor">#define MAX_BLOCKSIZE   32</span></div>
    161. 

  161. <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define DELTA           (0.000001f)</span></div>
    162. 

  162. <div class="line"><span class="preprocessor"></span></div>
    163. 

  163. <div class="line"></div>
    164. 

  164. <div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div>
    165. 

  165. <div class="line"><span class="comment">* Declare I/O buffers</span></div>
    166. 

  166. <div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div>
    167. 

  167. <div class="line"><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="arm__signal__converge__example__f32_8c.html#a16e759789fbc05f878863f009066c8ea">wire1</a>[<a name="a1"></a><a class="code" href="_a_r_m_2arm__convolution__example__f32_8c.html#af8a1d2ed31f7c9a00fec46a798edb61b">MAX_BLOCKSIZE</a>];</div>
    168. 

  168. <div class="line"><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="arm__signal__converge__example__f32_8c.html#a4e370163c81ae2b72cc655a6b79e4c6a">wire2</a>[<a class="code" href="_a_r_m_2arm__convolution__example__f32_8c.html#af8a1d2ed31f7c9a00fec46a798edb61b">MAX_BLOCKSIZE</a>];</div>
    169. 

  169. <div class="line"><a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a3"></a><a class="code" href="arm__signal__converge__example__f32_8c.html#a7e2cceadf6ec7f0aa0f698a680fa3a4b">wire3</a>[<a class="code" href="_a_r_m_2arm__convolution__example__f32_8c.html#af8a1d2ed31f7c9a00fec46a798edb61b">MAX_BLOCKSIZE</a>];</div>
    170. 

  170. <div class="line"></div>
    171. 

  171. <div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div>
    172. 

  172. <div class="line"><span class="comment">* Test input data for Floating point Variance example for 32-blockSize</span></div>
    173. 

  173. <div class="line"><span class="comment">* Generated by the MATLAB randn() function</span></div>
    174. 

  174. <div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div>
    175. 

  175. <div class="line"></div>
    176. 

  176. <div class="line"><a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a4"></a><a class="code" href="arm__graphic__equalizer__data_8c.html#a987ef9f3767fa5e083bcf2dd1efed05c">testInput_f32</a>[32] =</div>
    177. 

  177. <div class="line">{</div>
    178. 

  178. <div class="line">  -0.432564811528221,  -1.665584378238097,   0.125332306474831,   0.287676420358549,</div>
    179. 

  179. <div class="line">  -1.146471350681464,   1.190915465642999,   1.189164201652103,  -0.037633276593318,</div>
    180. 

  180. <div class="line">   0.327292361408654,   0.174639142820925,  -0.186708577681439,   0.725790548293303,</div>
    181. 

  181. <div class="line">  -0.588316543014189,   2.183185818197101,  -0.136395883086596,   0.113931313520810,</div>
    182. 

  182. <div class="line">   1.066768211359189,   0.059281460523605,  -0.095648405483669,  -0.832349463650022,</div>
    183. 

  183. <div class="line">   0.294410816392640,  -1.336181857937804,   0.714324551818952,   1.623562064446271,</div>
    184. 

  184. <div class="line">  -0.691775701702287,   0.857996672828263,   1.254001421602532,  -1.593729576447477,</div>
    185. 

  185. <div class="line">  -1.440964431901020,   0.571147623658178,  -0.399885577715363,   0.689997375464345</div>
    186. 

  186. <div class="line"></div>
    187. 

  187. <div class="line">};</div>
    188. 

  188. <div class="line"></div>
    189. 

  189. <div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div>
    190. 

  190. <div class="line"><span class="comment">* Declare Global variables</span></div>
    191. 

  191. <div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div>
    192. 

  192. <div class="line">uint32_t <a name="a5"></a><a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a> = 32;</div>
    193. 

  193. <div class="line"><a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a>  <a name="a6"></a><a class="code" href="arm__variance__example__f32_8c.html#a26cbbfe2a7905669e8440159465050df">refVarianceOut</a> = 0.903941793931839;</div>
    194. 

  194. <div class="line"></div>
    195. 

  195. <div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div>
    196. 

  196. <div class="line"><span class="comment">* Variance calculation test</span></div>
    197. 

  197. <div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div>
    198. 

  198. <div class="line"></div>
    199. 

  199. <div class="line">int32_t <a name="a7"></a><a class="code" href="_a_r_m_2arm__class__marks__example__f32_8c.html#a196718f834091385d38586a0ce4009dc">main</a>(<span class="keywordtype">void</span>)</div>
    200. 

  200. <div class="line">{</div>
    201. 

  201. <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="a8"></a><a class="code" href="_a_r_m_2arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a>;</div>
    202. 

  202. <div class="line">  <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a9"></a><a class="code" href="_a_r_m_2arm__class__marks__example__f32_8c.html#acc9290716b3c97381ce52d14b4b01681">mean</a>, oneByBlockSize;</div>
    203. 

  203. <div class="line">  <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> variance;</div>
    204. 

  204. <div class="line">  <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> diff;</div>
    205. 

  205. <div class="line"></div>
    206. 

  206. <div class="line">  status = <a name="a10"></a><a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>;</div>
    207. 

  207. <div class="line"></div>
    208. 

  208. <div class="line">  <span class="comment">/* Calculation of mean value of input */</span></div>
    209. 

  209. <div class="line"></div>
    210. 

  210. <div class="line">  <span class="comment">/* x&#39; = 1/blockSize * (x(0)* 1 + x(1) * 1 + ... + x(n-1) * 1) */</span></div>
    211. 

  211. <div class="line"></div>
    212. 

  212. <div class="line">  <span class="comment">/* Fill wire1 buffer with 1.0 value */</span></div>
    213. 

  213. <div class="line">  <a name="a11"></a><a class="code" href="group___fill.html#ga2248e8d3901b4afb7827163132baad94" title="Fills a constant value into a floating-point vector.">arm_fill_f32</a>(1.0,  <a class="code" href="arm__signal__converge__example__f32_8c.html#a16e759789fbc05f878863f009066c8ea">wire1</a>, <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>);</div>
    214. 

  214. <div class="line"></div>
    215. 

  215. <div class="line">  <span class="comment">/* Calculate the dot product of wire1 and wire2 */</span></div>
    216. 

  216. <div class="line">  <span class="comment">/* (x(0)* 1 + x(1) * 1 + ...+ x(n-1) * 1) */</span></div>
    217. 

  217. <div class="line">  <a name="a12"></a><a class="code" href="group__dot__prod.html#ga55418d4362f6ba84c327f9b4f089a8c3" title="Dot product of floating-point vectors.">arm_dot_prod_f32</a>(<a class="code" href="arm__graphic__equalizer__data_8c.html#a987ef9f3767fa5e083bcf2dd1efed05c">testInput_f32</a>, <a class="code" href="arm__signal__converge__example__f32_8c.html#a16e759789fbc05f878863f009066c8ea">wire1</a>, <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, &amp;mean);</div>
    218. 

  218. <div class="line"></div>
    219. 

  219. <div class="line">  <span class="comment">/* Calculation of 1/blockSize */</span></div>
    220. 

  220. <div class="line">  oneByBlockSize = 1.0 / (<a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>);</div>
    221. 

  221. <div class="line"></div>
    222. 

  222. <div class="line">  <span class="comment">/* 1/blockSize * (x(0)* 1 + x(1) * 1 + ... + x(n-1) * 1)  */</span></div>
    223. 

  223. <div class="line">  <a name="a13"></a><a class="code" href="group___basic_mult.html#gaca3f0b8227da431ab29225b88888aa32" title="Floating-point vector multiplication.">arm_mult_f32</a>(&amp;mean, &amp;oneByBlockSize, &amp;mean, 1);</div>
    224. 

  224. <div class="line"></div>
    225. 

  225. <div class="line"></div>
    226. 

  226. <div class="line">  <span class="comment">/* Calculation of variance value of input */</span></div>
    227. 

  227. <div class="line"></div>
    228. 

  228. <div class="line">  <span class="comment">/* (1/blockSize) * (x(0) - x&#39;) * (x(0) - x&#39;) + (x(1) - x&#39;) * (x(1) - x&#39;) + ... + (x(n-1) - x&#39;) * (x(n-1) - x&#39;) */</span></div>
    229. 

  229. <div class="line"></div>
    230. 

  230. <div class="line">  <span class="comment">/* Fill wire2 with mean value x&#39; */</span></div>
    231. 

  231. <div class="line">  <a class="code" href="group___fill.html#ga2248e8d3901b4afb7827163132baad94" title="Fills a constant value into a floating-point vector.">arm_fill_f32</a>(mean,  <a class="code" href="arm__signal__converge__example__f32_8c.html#a4e370163c81ae2b72cc655a6b79e4c6a">wire2</a>, <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>);</div>
    232. 

  232. <div class="line"></div>
    233. 

  233. <div class="line">  <span class="comment">/* wire3 contains (x-x&#39;) */</span></div>
    234. 

  234. <div class="line">  <a name="a14"></a><a class="code" href="group___basic_sub.html#ga7f975a472de286331134227c08aad826" title="Floating-point vector subtraction.">arm_sub_f32</a>(<a class="code" href="arm__graphic__equalizer__data_8c.html#a987ef9f3767fa5e083bcf2dd1efed05c">testInput_f32</a>, <a class="code" href="arm__signal__converge__example__f32_8c.html#a4e370163c81ae2b72cc655a6b79e4c6a">wire2</a>, <a class="code" href="arm__signal__converge__example__f32_8c.html#a7e2cceadf6ec7f0aa0f698a680fa3a4b">wire3</a>, <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>);</div>
    235. 

  235. <div class="line"></div>
    236. 

  236. <div class="line">  <span class="comment">/* wire2 contains (x-x&#39;) */</span></div>
    237. 

  237. <div class="line">  <a name="a15"></a><a class="code" href="group__copy.html#gadd1f737e677e0e6ca31767c7001417b3" title="Copies the elements of a floating-point vector.">arm_copy_f32</a>(<a class="code" href="arm__signal__converge__example__f32_8c.html#a7e2cceadf6ec7f0aa0f698a680fa3a4b">wire3</a>, <a class="code" href="arm__signal__converge__example__f32_8c.html#a4e370163c81ae2b72cc655a6b79e4c6a">wire2</a>, <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>);</div>
    238. 

  238. <div class="line"></div>
    239. 

  239. <div class="line">  <span class="comment">/* (x(0) - x&#39;) * (x(0) - x&#39;) + (x(1) - x&#39;) * (x(1) - x&#39;) + ... + (x(n-1) - x&#39;) * (x(n-1) - x&#39;) */</span></div>
    240. 

  240. <div class="line">  <a class="code" href="group__dot__prod.html#ga55418d4362f6ba84c327f9b4f089a8c3" title="Dot product of floating-point vectors.">arm_dot_prod_f32</a>(<a class="code" href="arm__signal__converge__example__f32_8c.html#a4e370163c81ae2b72cc655a6b79e4c6a">wire2</a>, <a class="code" href="arm__signal__converge__example__f32_8c.html#a7e2cceadf6ec7f0aa0f698a680fa3a4b">wire3</a>, <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>, &amp;variance);</div>
    241. 

  241. <div class="line"></div>
    242. 

  242. <div class="line">    <span class="comment">/* Calculation of 1/blockSize */</span></div>
    243. 

  243. <div class="line">  oneByBlockSize = 1.0 / (<a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a> - 1);</div>
    244. 

  244. <div class="line"></div>
    245. 

  245. <div class="line">  <span class="comment">/* Calculation of variance */</span></div>
    246. 

  246. <div class="line">  <a class="code" href="group___basic_mult.html#gaca3f0b8227da431ab29225b88888aa32" title="Floating-point vector multiplication.">arm_mult_f32</a>(&amp;variance, &amp;oneByBlockSize, &amp;variance, 1);</div>
    247. 

  247. <div class="line"></div>
    248. 

  248. <div class="line">  <span class="comment">/* absolute value of difference between ref and test */</span></div>
    249. 

  249. <div class="line">  diff = fabsf(<a class="code" href="arm__variance__example__f32_8c.html#a26cbbfe2a7905669e8440159465050df">refVarianceOut</a> - variance);</div>
    250. 

  250. <div class="line"></div>
    251. 

  251. <div class="line">  <span class="comment">/* Comparison of variance value with reference */</span></div>
    252. 

  252. <div class="line">  <span class="keywordflow">if</span>(diff &gt; <a name="a16"></a><a class="code" href="_a_r_m_2arm__convolution__example__f32_8c.html#a3fd2b1bcd7ddcf506237987ad780f495">DELTA</a>)</div>
    253. 

  253. <div class="line">  {</div>
    254. 

  254. <div class="line">    status = <a name="a17"></a><a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a09457f2be656b35015fd6d36202fa376">ARM_MATH_TEST_FAILURE</a>;</div>
    255. 

  255. <div class="line">  }</div>
    256. 

  256. <div class="line"></div>
    257. 

  257. <div class="line">  <span class="keywordflow">if</span>( status != <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a9f8b2a10bd827fb4600e77d455902eb0">ARM_MATH_SUCCESS</a>)</div>
    258. 

  258. <div class="line">  {</div>
    259. 

  259. <div class="line">    <span class="keywordflow">while</span>(1);</div>
    260. 

  260. <div class="line">  }</div>
    261. 

  261. <div class="line"></div>
    262. 

  262. <div class="line">  <span class="keywordflow">while</span>(1);                             <span class="comment">/* main function does not return */</span></div>
    263. 

  263. <div class="line">}</div>
    264. 

  264. <div class="line"></div>
    265. 

  265. </div><!-- fragment --> </div><!-- contents -->
    266. 

  266. </div><!-- doc-content -->
    267. 

  267. <!-- start footer part -->
    268. 

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  270.     <li class="footer">Generated on Tue Sep 23 2014 18:52:40 for CMSIS-DSP by ARM Ltd. All rights reserved.
    271. 

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