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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_variance_example_f32.c</span></div> +<div class="line"><span class="comment">*</span></div> +<div class="line"><span class="comment">* Description: Example code demonstrating variance calculation of input sequence.</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 <math.h></span></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"></div> +<div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div> +<div class="line"><span class="comment">* Defines each of the tests performed</span></div> +<div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div> +<div class="line"><span class="preprocessor">#define MAX_BLOCKSIZE 32</span></div> +<div class="line"><span class="preprocessor"></span><span class="preprocessor">#define DELTA (0.000001f)</span></div> +<div class="line"><span class="preprocessor"></span></div> +<div class="line"></div> +<div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div> +<div class="line"><span class="comment">* Declare I/O buffers</span></div> +<div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div> +<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> +<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> +<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> +<div class="line"></div> +<div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div> +<div class="line"><span class="comment">* Test input data for Floating point Variance example for 32-blockSize</span></div> +<div class="line"><span class="comment">* Generated by the MATLAB randn() function</span></div> +<div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div> +<div class="line"></div> +<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> +<div class="line">{</div> +<div class="line"> -0.432564811528221, -1.665584378238097, 0.125332306474831, 0.287676420358549,</div> +<div class="line"> -1.146471350681464, 1.190915465642999, 1.189164201652103, -0.037633276593318,</div> +<div class="line"> 0.327292361408654, 0.174639142820925, -0.186708577681439, 0.725790548293303,</div> +<div class="line"> -0.588316543014189, 2.183185818197101, -0.136395883086596, 0.113931313520810,</div> +<div class="line"> 1.066768211359189, 0.059281460523605, -0.095648405483669, -0.832349463650022,</div> +<div class="line"> 0.294410816392640, -1.336181857937804, 0.714324551818952, 1.623562064446271,</div> +<div class="line"> -0.691775701702287, 0.857996672828263, 1.254001421602532, -1.593729576447477,</div> +<div class="line"> -1.440964431901020, 0.571147623658178, -0.399885577715363, 0.689997375464345</div> +<div class="line"></div> +<div class="line">};</div> +<div class="line"></div> +<div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div> +<div class="line"><span class="comment">* Declare Global variables</span></div> +<div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div> +<div class="line">uint32_t <a name="a5"></a><a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a> = 32;</div> +<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> +<div class="line"></div> +<div class="line"><span class="comment">/* ----------------------------------------------------------------------</span></div> +<div class="line"><span class="comment">* Variance calculation test</span></div> +<div class="line"><span class="comment">* ------------------------------------------------------------------- */</span></div> +<div class="line"></div> +<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> +<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="a8"></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> <a name="a9"></a><a class="code" href="_a_r_m_2arm__class__marks__example__f32_8c.html#acc9290716b3c97381ce52d14b4b01681">mean</a>, oneByBlockSize;</div> +<div class="line"> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> variance;</div> +<div class="line"> <a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> diff;</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">/* Calculation of mean value of input */</span></div> +<div class="line"></div> +<div class="line"> <span class="comment">/* x' = 1/blockSize * (x(0)* 1 + x(1) * 1 + ... + x(n-1) * 1) */</span></div> +<div class="line"></div> +<div class="line"> <span class="comment">/* Fill wire1 buffer with 1.0 value */</span></div> +<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> +<div class="line"></div> +<div class="line"> <span class="comment">/* Calculate the dot product of wire1 and wire2 */</span></div> +<div class="line"> <span class="comment">/* (x(0)* 1 + x(1) * 1 + ...+ x(n-1) * 1) */</span></div> +<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>, &mean);</div> +<div class="line"></div> +<div class="line"> <span class="comment">/* Calculation of 1/blockSize */</span></div> +<div class="line"> oneByBlockSize = 1.0 / (<a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>);</div> +<div class="line"></div> +<div class="line"> <span class="comment">/* 1/blockSize * (x(0)* 1 + x(1) * 1 + ... + x(n-1) * 1) */</span></div> +<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>(&mean, &oneByBlockSize, &mean, 1);</div> +<div class="line"></div> +<div class="line"></div> +<div class="line"> <span class="comment">/* Calculation of variance value of input */</span></div> +<div class="line"></div> +<div class="line"> <span class="comment">/* (1/blockSize) * (x(0) - x') * (x(0) - x') + (x(1) - x') * (x(1) - x') + ... + (x(n-1) - x') * (x(n-1) - x') */</span></div> +<div class="line"></div> +<div class="line"> <span class="comment">/* Fill wire2 with mean value x' */</span></div> +<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> +<div class="line"></div> +<div class="line"> <span class="comment">/* wire3 contains (x-x') */</span></div> +<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> +<div class="line"></div> +<div class="line"> <span class="comment">/* wire2 contains (x-x') */</span></div> +<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> +<div class="line"></div> +<div class="line"> <span class="comment">/* (x(0) - x') * (x(0) - x') + (x(1) - x') * (x(1) - x') + ... + (x(n-1) - x') * (x(n-1) - x') */</span></div> +<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>, &variance);</div> +<div class="line"></div> +<div class="line"> <span class="comment">/* Calculation of 1/blockSize */</span></div> +<div class="line"> oneByBlockSize = 1.0 / (<a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a> - 1);</div> +<div class="line"></div> +<div class="line"> <span class="comment">/* Calculation of variance */</span></div> +<div class="line"> <a class="code" href="group___basic_mult.html#gaca3f0b8227da431ab29225b88888aa32" title="Floating-point vector multiplication.">arm_mult_f32</a>(&variance, &oneByBlockSize, &variance, 1);</div> +<div class="line"></div> +<div class="line"> <span class="comment">/* absolute value of difference between ref and test */</span></div> +<div class="line"> diff = fabsf(<a class="code" href="arm__variance__example__f32_8c.html#a26cbbfe2a7905669e8440159465050df">refVarianceOut</a> - variance);</div> +<div class="line"></div> +<div class="line"> <span class="comment">/* Comparison of variance value with reference */</span></div> +<div class="line"> <span class="keywordflow">if</span>(diff > <a name="a16"></a><a class="code" href="_a_r_m_2arm__convolution__example__f32_8c.html#a3fd2b1bcd7ddcf506237987ad780f495">DELTA</a>)</div> +<div class="line"> {</div> +<div class="line"> status = <a name="a17"></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="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> |