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<div id="projectname">RTOS_MSPM0
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 <span id="projectnumber">1.1</span>
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<div id="projectbrief">ECE445M starter code</div>
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<li class="navelem"><a class="el" href="dir_d9737668015ddda3d9b152d7c8d1103c.html">RTOS_Labs_common</a></li> </ul>
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<div class="title">FFT.h</div> </div>
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<a href="_f_f_t_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>  </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">/* Factored discrete Fourier transform, or FFT, and its inverse iFFT */</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">// Derived from </span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// http://www.math.wustl.edu/~victor/mfmm/index.html#mfmm-software</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// Mathematics for Multimedia, ISBN 978-0-8176-4879-4, was formerly managed by Elsevier/Academic Press.</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// MSP432 available RAM limits size to N=2048 points</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <math.h></span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <stdlib.h></span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="structcomplex.html"> 29</a></span> <span class="keyword">struct </span><a class="code" href="structcomplex.html">complex</a>{</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordtype">float</span> Real; </div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordtype">float</span> Imag;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> }; </div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structcomplex.html">complex</a> <a class="code" href="structcomplex.html">complex_t</a>;</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#ifndef PI</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="group___math.html#ga598a3330b3c21701223ee0ca14316eca"> 39</a></span> <span class="preprocessor">#define PI 3.14159265358979323846264338327950288</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  </div>
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<div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="group___math.html#ga7e6991842a107b203a304c191d574591"> 60</a></span> <span class="keywordtype">void</span> <a class="code" href="group___math.html#ga7e6991842a107b203a304c191d574591">fft</a>(<a class="code" href="structcomplex.html">complex_t</a> *v, <span class="keywordtype">int</span> n, <a class="code" href="structcomplex.html">complex_t</a> *tmp);</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  </div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  </div>
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<div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="group___math.html#ga4ad1f9b6c8ed4f2fdb439e795c3c0e3a"> 80</a></span> <span class="keywordtype">void</span> <a class="code" href="group___math.html#ga4ad1f9b6c8ed4f2fdb439e795c3c0e3a">ifft</a>(<a class="code" href="structcomplex.html">complex_t</a> *v, <span class="keywordtype">int</span> n, <a class="code" href="structcomplex.html">complex_t</a> *tmp);</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  </div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  </div>
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<div class="ttc" id="agroup___math_html_ga4ad1f9b6c8ed4f2fdb439e795c3c0e3a"><div class="ttname"><a href="group___math.html#ga4ad1f9b6c8ed4f2fdb439e795c3c0e3a">ifft</a></div><div class="ttdeci">void ifft(complex_t *v, int n, complex_t *tmp)</div><div class="ttdoc">Inverse fft.</div></div>
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<div class="ttc" id="agroup___math_html_ga7e6991842a107b203a304c191d574591"><div class="ttname"><a href="group___math.html#ga7e6991842a107b203a304c191d574591">fft</a></div><div class="ttdeci">void fft(complex_t *v, int n, complex_t *tmp)</div><div class="ttdoc">fft</div></div>
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<div class="ttc" id="astructcomplex_html"><div class="ttname"><a href="structcomplex.html">complex</a></div><div class="ttdoc">a complex number has a real and imaginary part</div><div class="ttdef"><b>Definition:</b> FFT.h:29</div></div>
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