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<a href="_l_p_f_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160; </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment">/* This example accompanies the books</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="comment"> &quot;Embedded Systems: Introduction to ARM Cortex M Microcontrollers&quot;,</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="comment"> ISBN: 978-1469998749, Jonathan Valvano, copyright (c) 2020</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="comment"> &quot;Embedded Systems: Real Time Interfacing to ARM Cortex M Microcontrollers&quot;,</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="comment"> ISBN: 978-1463590154, Jonathan Valvano, copyright (c) 2020</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="comment"> &quot;Embedded Systems: Real-Time Operating Systems for ARM Cortex-M Microcontrollers&quot;,</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="comment"> ISBN: 978-1466468863, Jonathan Valvano, copyright (c) 2020</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="comment"> Copyright 2020 by Jonathan W. Valvano, valvano@mail.utexas.edu</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="comment"> You may use, edit, run or distribute this file</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="comment"> as long as the above copyright notice remains</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="comment"> THIS SOFTWARE IS PROVIDED &quot;AS IS&quot;. NO WARRANTIES, WHETHER EXPRESS, IMPLIED</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="comment"> OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="comment"> MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="comment"> VALVANO SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="comment"> OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="comment"> For more information about my classes, my research, and my books, see</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="comment"> http://users.ece.utexas.edu/~valvano/</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="preprocessor">#include &lt;stdint.h&gt;</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#af4847a68c9bdbec64472e73fab85dd40"> 46</a></span>&#160;uint32_t <a class="code" href="_l_p_f_8h.html#af4847a68c9bdbec64472e73fab85dd40">sqrt2</a>(uint32_t s);</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; </div>
<div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#af7d70f8afc107b2794bee1af527b24c5"> 56</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="_l_p_f_8h.html#af7d70f8afc107b2794bee1af527b24c5">LPF_Init</a>(int32_t initial, int32_t size);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; </div>
<div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#a286c730f375884325d2bfac09b7d1319"> 65</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#a286c730f375884325d2bfac09b7d1319">LPF_Calc</a>(int32_t newdata);</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;int32_t Noise1(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; </div>
<div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#ae48c26ec384164fefece850b6f1b89a7"> 76</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="_l_p_f_8h.html#ae48c26ec384164fefece850b6f1b89a7">LPF_Init2</a>(int32_t initial, int32_t size);</div>
<div class="line"><a name="l00084"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#acb5a9e86000732b7467e174f5be6bf45"> 84</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#acb5a9e86000732b7467e174f5be6bf45">LPF_Calc2</a>(int32_t newdata);</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;int32_t Noise2(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#af7730e3d364813d54a35aa280233c3a2"> 94</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="_l_p_f_8h.html#af7730e3d364813d54a35aa280233c3a2">LPF_Init3</a>(int32_t initial, int32_t size);</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; </div>
<div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#a565e5140ad720b069553344e61e872ef"> 103</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#a565e5140ad720b069553344e61e872ef">LPF_Calc3</a>(int32_t newdata);</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;int32_t Noise3(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; </div>
<div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#afea37258c6ce396034e92806c7bb5b0b"> 114</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="_l_p_f_8h.html#afea37258c6ce396034e92806c7bb5b0b">LPF_Init4</a>(int32_t initial, int32_t size);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; </div>
<div class="line"><a name="l00123"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#a3bc36e3502c277fc82493783b65a1edf"> 123</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#a3bc36e3502c277fc82493783b65a1edf">LPF_Calc4</a>(int32_t newdata);</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;int32_t Noise4(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; </div>
<div class="line"><a name="l00134"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#a189fed12db9d7249f3143d88333408f8"> 134</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="_l_p_f_8h.html#a189fed12db9d7249f3143d88333408f8">LPF_Init5</a>(int32_t initial, int32_t size);</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; </div>
<div class="line"><a name="l00143"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#aad7b30d13c51243a344d27bb469cce9e"> 143</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#aad7b30d13c51243a344d27bb469cce9e">LPF_Calc5</a>(int32_t newdata);</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160;int32_t Noise5(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00153"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#ab5e8dc58b78c7d8f5d4cade640e81e49"> 153</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="_l_p_f_8h.html#ab5e8dc58b78c7d8f5d4cade640e81e49">LPF_Init6</a>(int32_t initial, int32_t size);</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; </div>
<div class="line"><a name="l00162"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#a551ef67c8de4b59a80094d92b1d3642e"> 162</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#a551ef67c8de4b59a80094d92b1d3642e">LPF_Calc6</a>(int32_t newdata);</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;int32_t Noise6(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; </div>
<div class="line"><a name="l00173"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#a42d27ed4510d9a29f134758819d8d444"> 173</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="_l_p_f_8h.html#a42d27ed4510d9a29f134758819d8d444">LPF_Init7</a>(int32_t initial, int32_t size);</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; </div>
<div class="line"><a name="l00182"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#ad16c41b3ebe85c6f78912f68a4418f0d"> 182</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#ad16c41b3ebe85c6f78912f68a4418f0d">LPF_Calc7</a>(int32_t newdata);</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160;int32_t Noise7(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; </div>
<div class="line"><a name="l00192"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#ab880f5c671175cde000252f8d38f8bda"> 192</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#ab880f5c671175cde000252f8d38f8bda">Median</a>(int32_t newdata);</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; </div>
<div class="line"><a name="l00201"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#aa49a8428e0c2e11918c5ef6b28bec9f8"> 201</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#aa49a8428e0c2e11918c5ef6b28bec9f8">Median5</a>(int32_t newdata);</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; </div>
<div class="line"><a name="l00210"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#a307298406cc61408f5a61874dc0422d2"> 210</a></span>&#160;int32_t <a class="code" href="_l_p_f_8h.html#a307298406cc61408f5a61874dc0422d2">Median7</a>(int32_t newdata);</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; </div>
<div class="line"><a name="l00220"></a><span class="lineno"><a class="line" href="_l_p_f_8h.html#aa66d6564f84ecb1e778aeb16183febff"> 220</a></span>&#160; int32_t <a class="code" href="_l_p_f_8h.html#aa66d6564f84ecb1e778aeb16183febff">Filter</a>(int32_t data);</div>
<div class="ttc" id="a_l_p_f_8h_html_a189fed12db9d7249f3143d88333408f8"><div class="ttname"><a href="_l_p_f_8h.html#a189fed12db9d7249f3143d88333408f8">LPF_Init5</a></div><div class="ttdeci">void LPF_Init5(int32_t initial, int32_t size)</div><div class="ttdoc">Initialize fifth LPF.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_a286c730f375884325d2bfac09b7d1319"><div class="ttname"><a href="_l_p_f_8h.html#a286c730f375884325d2bfac09b7d1319">LPF_Calc</a></div><div class="ttdeci">int32_t LPF_Calc(int32_t newdata)</div><div class="ttdoc">FIR low pass filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_a307298406cc61408f5a61874dc0422d2"><div class="ttname"><a href="_l_p_f_8h.html#a307298406cc61408f5a61874dc0422d2">Median7</a></div><div class="ttdeci">int32_t Median7(int32_t newdata)</div><div class="ttdoc">Median filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_a3bc36e3502c277fc82493783b65a1edf"><div class="ttname"><a href="_l_p_f_8h.html#a3bc36e3502c277fc82493783b65a1edf">LPF_Calc4</a></div><div class="ttdeci">int32_t LPF_Calc4(int32_t newdata)</div><div class="ttdoc">FIR low pass filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_a42d27ed4510d9a29f134758819d8d444"><div class="ttname"><a href="_l_p_f_8h.html#a42d27ed4510d9a29f134758819d8d444">LPF_Init7</a></div><div class="ttdeci">void LPF_Init7(int32_t initial, int32_t size)</div><div class="ttdoc">Initialize Seventh LPF.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_a551ef67c8de4b59a80094d92b1d3642e"><div class="ttname"><a href="_l_p_f_8h.html#a551ef67c8de4b59a80094d92b1d3642e">LPF_Calc6</a></div><div class="ttdeci">int32_t LPF_Calc6(int32_t newdata)</div><div class="ttdoc">FIR low pass filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_a565e5140ad720b069553344e61e872ef"><div class="ttname"><a href="_l_p_f_8h.html#a565e5140ad720b069553344e61e872ef">LPF_Calc3</a></div><div class="ttdeci">int32_t LPF_Calc3(int32_t newdata)</div><div class="ttdoc">FIR low pass filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_aa49a8428e0c2e11918c5ef6b28bec9f8"><div class="ttname"><a href="_l_p_f_8h.html#aa49a8428e0c2e11918c5ef6b28bec9f8">Median5</a></div><div class="ttdeci">int32_t Median5(int32_t newdata)</div><div class="ttdoc">Median filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_aa66d6564f84ecb1e778aeb16183febff"><div class="ttname"><a href="_l_p_f_8h.html#aa66d6564f84ecb1e778aeb16183febff">Filter</a></div><div class="ttdeci">int32_t Filter(int32_t data)</div><div class="ttdoc">60-Hz notch high-Q, IIR filter</div></div>
<div class="ttc" id="a_l_p_f_8h_html_aad7b30d13c51243a344d27bb469cce9e"><div class="ttname"><a href="_l_p_f_8h.html#aad7b30d13c51243a344d27bb469cce9e">LPF_Calc5</a></div><div class="ttdeci">int32_t LPF_Calc5(int32_t newdata)</div><div class="ttdoc">FIR low pass filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_ab5e8dc58b78c7d8f5d4cade640e81e49"><div class="ttname"><a href="_l_p_f_8h.html#ab5e8dc58b78c7d8f5d4cade640e81e49">LPF_Init6</a></div><div class="ttdeci">void LPF_Init6(int32_t initial, int32_t size)</div><div class="ttdoc">Initialize Sixth LPF.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_ab880f5c671175cde000252f8d38f8bda"><div class="ttname"><a href="_l_p_f_8h.html#ab880f5c671175cde000252f8d38f8bda">Median</a></div><div class="ttdeci">int32_t Median(int32_t newdata)</div><div class="ttdoc">Median filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_acb5a9e86000732b7467e174f5be6bf45"><div class="ttname"><a href="_l_p_f_8h.html#acb5a9e86000732b7467e174f5be6bf45">LPF_Calc2</a></div><div class="ttdeci">int32_t LPF_Calc2(int32_t newdata)</div><div class="ttdoc">FIR low pass filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_ad16c41b3ebe85c6f78912f68a4418f0d"><div class="ttname"><a href="_l_p_f_8h.html#ad16c41b3ebe85c6f78912f68a4418f0d">LPF_Calc7</a></div><div class="ttdeci">int32_t LPF_Calc7(int32_t newdata)</div><div class="ttdoc">FIR low pass filter.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_ae48c26ec384164fefece850b6f1b89a7"><div class="ttname"><a href="_l_p_f_8h.html#ae48c26ec384164fefece850b6f1b89a7">LPF_Init2</a></div><div class="ttdeci">void LPF_Init2(int32_t initial, int32_t size)</div><div class="ttdoc">Initialize second LPF.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_af4847a68c9bdbec64472e73fab85dd40"><div class="ttname"><a href="_l_p_f_8h.html#af4847a68c9bdbec64472e73fab85dd40">sqrt2</a></div><div class="ttdeci">uint32_t sqrt2(uint32_t s)</div><div class="ttdoc">square root</div></div>
<div class="ttc" id="a_l_p_f_8h_html_af7730e3d364813d54a35aa280233c3a2"><div class="ttname"><a href="_l_p_f_8h.html#af7730e3d364813d54a35aa280233c3a2">LPF_Init3</a></div><div class="ttdeci">void LPF_Init3(int32_t initial, int32_t size)</div><div class="ttdoc">Initialize third LPF.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_af7d70f8afc107b2794bee1af527b24c5"><div class="ttname"><a href="_l_p_f_8h.html#af7d70f8afc107b2794bee1af527b24c5">LPF_Init</a></div><div class="ttdeci">void LPF_Init(int32_t initial, int32_t size)</div><div class="ttdoc">Initialize first LPF.</div></div>
<div class="ttc" id="a_l_p_f_8h_html_afea37258c6ce396034e92806c7bb5b0b"><div class="ttname"><a href="_l_p_f_8h.html#afea37258c6ce396034e92806c7bb5b0b">LPF_Init4</a></div><div class="ttdeci">void LPF_Init4(int32_t initial, int32_t size)</div><div class="ttdoc">Initialize third LPF.</div></div>
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