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<h1>arm_lms_init_q15.c</h1> </div>
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<a href="arm__lms__init__q15_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: 15. July 2011 </span>
<a name="l00005"></a>00005 <span class="comment">* $Revision: V1.0.10 </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_lms_init_q15.c </span>
<a name="l00009"></a>00009 <span class="comment">* </span>
<a name="l00010"></a>00010 <span class="comment">* Description: Q15 LMS filter initialization function. </span>
<a name="l00011"></a>00011 <span class="comment">* </span>
<a name="l00012"></a>00012 <span class="comment">* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0</span>
<a name="l00013"></a>00013 <span class="comment">* </span>
<a name="l00014"></a>00014 <span class="comment">* Version 1.0.10 2011/7/15 </span>
<a name="l00015"></a>00015 <span class="comment">* Big Endian support added and Merged M0 and M3/M4 Source code. </span>
<a name="l00016"></a>00016 <span class="comment">* </span>
<a name="l00017"></a>00017 <span class="comment">* Version 1.0.3 2010/11/29 </span>
<a name="l00018"></a>00018 <span class="comment">* Re-organized the CMSIS folders and updated documentation. </span>
<a name="l00019"></a>00019 <span class="comment">* </span>
<a name="l00020"></a>00020 <span class="comment">* Version 1.0.2 2010/11/11 </span>
<a name="l00021"></a>00021 <span class="comment">* Documentation updated. </span>
<a name="l00022"></a>00022 <span class="comment">* </span>
<a name="l00023"></a>00023 <span class="comment">* Version 1.0.1 2010/10/05 </span>
<a name="l00024"></a>00024 <span class="comment">* Production release and review comments incorporated. </span>
<a name="l00025"></a>00025 <span class="comment">* </span>
<a name="l00026"></a>00026 <span class="comment">* Version 1.0.0 2010/09/20 </span>
<a name="l00027"></a>00027 <span class="comment">* Production release and review comments incorporated </span>
<a name="l00028"></a>00028 <span class="comment">* </span>
<a name="l00029"></a>00029 <span class="comment">* Version 0.0.7 2010/06/10 </span>
<a name="l00030"></a>00030 <span class="comment">* Misra-C changes done </span>
<a name="l00031"></a>00031 <span class="comment">* ---------------------------------------------------------------------------*/</span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="preprocessor">#include &quot;<a class="code" href="arm__math_8h.html">arm_math.h</a>&quot;</span>
<a name="l00034"></a>00034
<a name="l00066"></a><a class="code" href="group___l_m_s.html#ga9544cc26f18cd4465cfbed371be822b3">00066</a> <span class="keywordtype">void</span> <a class="code" href="group___l_m_s.html#ga9544cc26f18cd4465cfbed371be822b3" title="Initialization function for the Q15 LMS filter.">arm_lms_init_q15</a>(
<a name="l00067"></a>00067 <a class="code" href="structarm__lms__instance__q15.html" title="Instance structure for the Q15 LMS filter.">arm_lms_instance_q15</a> * S,
<a name="l00068"></a>00068 uint16_t numTaps,
<a name="l00069"></a>00069 <a class="code" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea" title="16-bit fractional data type in 1.15 format.">q15_t</a> * pCoeffs,
<a name="l00070"></a>00070 <a class="code" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea" title="16-bit fractional data type in 1.15 format.">q15_t</a> * pState,
<a name="l00071"></a>00071 <a class="code" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea" title="16-bit fractional data type in 1.15 format.">q15_t</a> mu,
<a name="l00072"></a>00072 uint32_t <a class="code" href="arm__fir__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>,
<a name="l00073"></a>00073 uint32_t postShift)
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075 <span class="comment">/* Assign filter taps */</span>
<a name="l00076"></a>00076 S-&gt;<a class="code" href="structarm__lms__instance__q15.html#a0078e894f805af1b360369e619fb57b3">numTaps</a> = numTaps;
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="comment">/* Assign coefficient pointer */</span>
<a name="l00079"></a>00079 S-&gt;<a class="code" href="structarm__lms__instance__q15.html#a42f95368b94898eb82608e1113d18cab">pCoeffs</a> = pCoeffs;
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="comment">/* Clear state buffer and size is always blockSize + numTaps - 1 */</span>
<a name="l00082"></a>00082 memset(pState, 0, (numTaps + (blockSize - 1u)) * <span class="keyword">sizeof</span>(<a class="code" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea" title="16-bit fractional data type in 1.15 format.">q15_t</a>));
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="comment">/* Assign state pointer */</span>
<a name="l00085"></a>00085 S-&gt;<a class="code" href="structarm__lms__instance__q15.html#a9a575ff82c1e68cbb583083439260d08">pState</a> = pState;
<a name="l00086"></a>00086
<a name="l00087"></a>00087 <span class="comment">/* Assign Step size value */</span>
<a name="l00088"></a>00088 S-&gt;<a class="code" href="structarm__lms__instance__q15.html#aae46129d7cfd7f1c162cc502ed0a9d49">mu</a> = mu;
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">/* Assign postShift value to be applied */</span>
<a name="l00091"></a>00091 S-&gt;<a class="code" href="structarm__lms__instance__q15.html#acca5fbaef4a52ae411de24c9a0b929cf">postShift</a> = postShift;
<a name="l00092"></a>00092
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094
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