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  115. <div class="contents">
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  118. Variables</h2></td></tr>
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  119. <tr class="memitem:gae247e83ad50d474107254e25b36ad42b"><td class="memItemLeft" align="right" valign="top">const uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gae247e83ad50d474107254e25b36ad42b">armBitRevTable</a> [1024]</td></tr>
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  121. <tr class="memitem:gae75e243ec61706427314270f222e0c8e"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gae75e243ec61706427314270f222e0c8e">twiddleCoef_16</a> [32]</td></tr>
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  122. <tr class="separator:gae75e243ec61706427314270f222e0c8e"><td class="memSeparator" colspan="2">&#160;</td></tr>
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  123. <tr class="memitem:ga78a72c85d88185de98050c930cfc76e3"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga78a72c85d88185de98050c930cfc76e3">twiddleCoef_32</a> [64]</td></tr>
    124. 

  124. <tr class="separator:ga78a72c85d88185de98050c930cfc76e3"><td class="memSeparator" colspan="2">&#160;</td></tr>
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  125. <tr class="memitem:ga4f3c6d98c7e66393b4ef3ac63746e43d"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga4f3c6d98c7e66393b4ef3ac63746e43d">twiddleCoef_64</a> [128]</td></tr>
    126. 

  126. <tr class="separator:ga4f3c6d98c7e66393b4ef3ac63746e43d"><td class="memSeparator" colspan="2">&#160;</td></tr>
    127. 

  127. <tr class="memitem:ga948433536dafaac1381decfccf4e2d9c"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga948433536dafaac1381decfccf4e2d9c">twiddleCoef_128</a> [256]</td></tr>
    128. 

  128. <tr class="separator:ga948433536dafaac1381decfccf4e2d9c"><td class="memSeparator" colspan="2">&#160;</td></tr>
    129. 

  129. <tr class="memitem:gafe813758a03a798e972359a092315be4"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gafe813758a03a798e972359a092315be4">twiddleCoef_256</a> [512]</td></tr>
    130. 

  130. <tr class="separator:gafe813758a03a798e972359a092315be4"><td class="memSeparator" colspan="2">&#160;</td></tr>
    131. 

  131. <tr class="memitem:gad8830f0c068ab2cc19f2f87d220fa148"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gad8830f0c068ab2cc19f2f87d220fa148">twiddleCoef_512</a> [1024]</td></tr>
    132. 

  132. <tr class="separator:gad8830f0c068ab2cc19f2f87d220fa148"><td class="memSeparator" colspan="2">&#160;</td></tr>
    133. 

  133. <tr class="memitem:ga27c056eb130a4333d1cc5dd43ec738b1"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga27c056eb130a4333d1cc5dd43ec738b1">twiddleCoef_1024</a> [2048]</td></tr>
    134. 

  134. <tr class="separator:ga27c056eb130a4333d1cc5dd43ec738b1"><td class="memSeparator" colspan="2">&#160;</td></tr>
    135. 

  135. <tr class="memitem:ga23e7f30421a7905b21c2015429779633"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga23e7f30421a7905b21c2015429779633">twiddleCoef_2048</a> [4096]</td></tr>
    136. 

  136. <tr class="separator:ga23e7f30421a7905b21c2015429779633"><td class="memSeparator" colspan="2">&#160;</td></tr>
    137. 

  137. <tr class="memitem:gae0182d1dd3b2f21aad4e38a815a0bd40"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gae0182d1dd3b2f21aad4e38a815a0bd40">twiddleCoef_4096</a> [8192]</td></tr>
    138. 

  138. <tr class="separator:gae0182d1dd3b2f21aad4e38a815a0bd40"><td class="memSeparator" colspan="2">&#160;</td></tr>
    139. 

  139. <tr class="memitem:gaef4697e1ba348c4ac9358f2b9e279e93"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gaef4697e1ba348c4ac9358f2b9e279e93">twiddleCoef_16_q31</a> [24]</td></tr>
    140. 

  140. <tr class="separator:gaef4697e1ba348c4ac9358f2b9e279e93"><td class="memSeparator" colspan="2">&#160;</td></tr>
    141. 

  141. <tr class="memitem:ga8ba78d5e6ef4bdc58e8f0044e0664a0a"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga8ba78d5e6ef4bdc58e8f0044e0664a0a">twiddleCoef_32_q31</a> [48]</td></tr>
    142. 

  142. <tr class="separator:ga8ba78d5e6ef4bdc58e8f0044e0664a0a"><td class="memSeparator" colspan="2">&#160;</td></tr>
    143. 

  143. <tr class="memitem:ga6e0a7e941a25a0d74b2e6590307de47e"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga6e0a7e941a25a0d74b2e6590307de47e">twiddleCoef_64_q31</a> [96]</td></tr>
    144. 

  144. <tr class="separator:ga6e0a7e941a25a0d74b2e6590307de47e"><td class="memSeparator" colspan="2">&#160;</td></tr>
    145. 

  145. <tr class="memitem:gafecf9ed9873415d9f5f17f37b30c7250"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gafecf9ed9873415d9f5f17f37b30c7250">twiddleCoef_128_q31</a> [192]</td></tr>
    146. 

  146. <tr class="separator:gafecf9ed9873415d9f5f17f37b30c7250"><td class="memSeparator" colspan="2">&#160;</td></tr>
    147. 

  147. <tr class="memitem:gaef1ea005053b715b851cf5f908168ede"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gaef1ea005053b715b851cf5f908168ede">twiddleCoef_256_q31</a> [384]</td></tr>
    148. 

  148. <tr class="separator:gaef1ea005053b715b851cf5f908168ede"><td class="memSeparator" colspan="2">&#160;</td></tr>
    149. 

  149. <tr class="memitem:ga416c61b2f08542a39111e06b0378bebe"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga416c61b2f08542a39111e06b0378bebe">twiddleCoef_512_q31</a> [768]</td></tr>
    150. 

  150. <tr class="separator:ga416c61b2f08542a39111e06b0378bebe"><td class="memSeparator" colspan="2">&#160;</td></tr>
    151. 

  151. <tr class="memitem:ga514443c44b62b8b3d240afefebcda310"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga514443c44b62b8b3d240afefebcda310">twiddleCoef_1024_q31</a> [1536]</td></tr>
    152. 

  152. <tr class="separator:ga514443c44b62b8b3d240afefebcda310"><td class="memSeparator" colspan="2">&#160;</td></tr>
    153. 

  153. <tr class="memitem:ga9c5767de9f5a409fd0c2027e6ac67179"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga9c5767de9f5a409fd0c2027e6ac67179">twiddleCoef_2048_q31</a> [3072]</td></tr>
    154. 

  154. <tr class="separator:ga9c5767de9f5a409fd0c2027e6ac67179"><td class="memSeparator" colspan="2">&#160;</td></tr>
    155. 

  155. <tr class="memitem:ga67c0890317deab3391e276f22c1fc400"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga67c0890317deab3391e276f22c1fc400">twiddleCoef_4096_q31</a> [6144]</td></tr>
    156. 

  156. <tr class="separator:ga67c0890317deab3391e276f22c1fc400"><td class="memSeparator" colspan="2">&#160;</td></tr>
    157. 

  157. <tr class="memitem:ga8e4e2e05f4a3112184c96cb3308d6c39"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga8e4e2e05f4a3112184c96cb3308d6c39">twiddleCoef_16_q15</a> [24]</td></tr>
    158. 

  158. <tr class="separator:ga8e4e2e05f4a3112184c96cb3308d6c39"><td class="memSeparator" colspan="2">&#160;</td></tr>
    159. 

  159. <tr class="memitem:gac194a4fe04a19051ae1811f69c6e5df2"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gac194a4fe04a19051ae1811f69c6e5df2">twiddleCoef_32_q15</a> [48]</td></tr>
    160. 

  160. <tr class="separator:gac194a4fe04a19051ae1811f69c6e5df2"><td class="memSeparator" colspan="2">&#160;</td></tr>
    161. 

  161. <tr class="memitem:gaa0cc411e0b3c82078e85cfdf1b84290f"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gaa0cc411e0b3c82078e85cfdf1b84290f">twiddleCoef_64_q15</a> [96]</td></tr>
    162. 

  162. <tr class="separator:gaa0cc411e0b3c82078e85cfdf1b84290f"><td class="memSeparator" colspan="2">&#160;</td></tr>
    163. 

  163. <tr class="memitem:gabfdd1c5cd2b3f96da5fe5f07c707a8e5"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gabfdd1c5cd2b3f96da5fe5f07c707a8e5">twiddleCoef_128_q15</a> [192]</td></tr>
    164. 

  164. <tr class="separator:gabfdd1c5cd2b3f96da5fe5f07c707a8e5"><td class="memSeparator" colspan="2">&#160;</td></tr>
    165. 

  165. <tr class="memitem:ga6099ae5262a0a3a8d9ce1e6da02f0c2e"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga6099ae5262a0a3a8d9ce1e6da02f0c2e">twiddleCoef_256_q15</a> [384]</td></tr>
    166. 

  166. <tr class="separator:ga6099ae5262a0a3a8d9ce1e6da02f0c2e"><td class="memSeparator" colspan="2">&#160;</td></tr>
    167. 

  167. <tr class="memitem:ga6152621af210f847128c6f38958fa385"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga6152621af210f847128c6f38958fa385">twiddleCoef_512_q15</a> [768]</td></tr>
    168. 

  168. <tr class="separator:ga6152621af210f847128c6f38958fa385"><td class="memSeparator" colspan="2">&#160;</td></tr>
    169. 

  169. <tr class="memitem:ga8a0ec95d866fe96b740e77d6e1356b59"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga8a0ec95d866fe96b740e77d6e1356b59">twiddleCoef_1024_q15</a> [1536]</td></tr>
    170. 

  170. <tr class="separator:ga8a0ec95d866fe96b740e77d6e1356b59"><td class="memSeparator" colspan="2">&#160;</td></tr>
    171. 

  171. <tr class="memitem:gadd16ce08ffd1048c385e0534a3b19cbb"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gadd16ce08ffd1048c385e0534a3b19cbb">twiddleCoef_2048_q15</a> [3072]</td></tr>
    172. 

  172. <tr class="separator:gadd16ce08ffd1048c385e0534a3b19cbb"><td class="memSeparator" colspan="2">&#160;</td></tr>
    173. 

  173. <tr class="memitem:ga9b409d6995eab17805b1d1881d4bc652"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga9b409d6995eab17805b1d1881d4bc652">twiddleCoef_4096_q15</a> [6144]</td></tr>
    174. 

  174. <tr class="separator:ga9b409d6995eab17805b1d1881d4bc652"><td class="memSeparator" colspan="2">&#160;</td></tr>
    175. 

  175. </table>
    176. 

  176. <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
    177. 

  177. <h2 class="groupheader">Variable Documentation</h2>
    178. 

  178. <a class="anchor" id="gae247e83ad50d474107254e25b36ad42b"></a>
    179. 

  179. <div class="memitem">
    180. 

  180. <div class="memproto">
    181. 

  181.       <table class="memname">
    182. 

  182.         <tr>
    183. 

  183.           <td class="memname">const uint16_t armBitRevTable[1024]</td>
    184. 

  184.         </tr>
    185. 

  185.       </table>
    186. 

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

  187. <dl class="section user"><dt></dt><dd>Pseudo code for Generation of Bit reversal Table is </dd></dl>
    188. 

  188. <dl class="section user"><dt></dt><dd><pre>for(l=1;l &lt;= N/4;l++)
    189. 

  189. {
    190. 

  190.   for(i=0;i&lt;logN2;i++)
    191. 

  191.   {
    192. 

  192.     a[i]=l&amp;(1&lt;&lt;i);
    193. 

  193.   }
    194. 

  194.   for(j=0; j&lt;logN2; j++)
    195. 

  195.   {
    196. 

  196.     if (a[j]!=0)
    197. 

  197.     y[l]+=(1&lt;&lt;((logN2-1)-j));
    198. 

  198.   }
    199. 

  199.   y[l] = y[l] &gt;&gt; 1;
    200. 

  200.  } </pre> </dd></dl>
    201. 

  201. <dl class="section user"><dt></dt><dd>where N = 4096 logN2 = 12 </dd></dl>
    202. 

  202. <dl class="section user"><dt></dt><dd>N is the maximum FFT Size supported </dd></dl>
    203. 

  203. 

  204. <p>Referenced by <a class="el" href="group__ComplexFFT.html#gac9565e6bc7229577ecf5e090313cafd7">arm_cfft_radix2_init_f32()</a>, <a class="el" href="group__ComplexFFT.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, <a class="el" href="group__ComplexFFT.html#gabec9611e77382f31e152668bf6b4b638">arm_cfft_radix2_init_q31()</a>, <a class="el" href="group__ComplexFFT.html#gaf336459f684f0b17bfae539ef1b1b78a">arm_cfft_radix4_init_f32()</a>, <a class="el" href="group__ComplexFFT.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>, and <a class="el" href="group__ComplexFFT.html#gad5caaafeec900c8ff72321c01bbd462c">arm_cfft_radix4_init_q31()</a>.</p>
    205. 

  205. 

  206. </div>
    207. 

  207. </div>
    208. 

  208. <a class="anchor" id="ga27c056eb130a4333d1cc5dd43ec738b1"></a>
    209. 

  209. <div class="memitem">
    210. 

  210. <div class="memproto">
    211. 

  211.       <table class="memname">
    212. 

  212.         <tr>
    213. 

  213.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_1024[2048]</td>
    214. 

  214.         </tr>
    215. 

  215.       </table>
    216. 

  216. </div><div class="memdoc">
    217. 

  217. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    218. 

  218. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    219. 

  219. {
    220. 

  220.       twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
    221. 

  221.       twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
    222. 

  222. } </pre> </dd></dl>
    223. 

  223. <dl class="section user"><dt></dt><dd>where N = 1024 and PI = 3.14159265358979 </dd></dl>
    224. 

  224. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    225. 

  225. 

  226. <p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
    227. 

  227. 

  228. </div>
    229. 

  229. </div>
    230. 

  230. <a class="anchor" id="ga8a0ec95d866fe96b740e77d6e1356b59"></a>
    231. 

  231. <div class="memitem">
    232. 

  232. <div class="memproto">
    233. 

  233.       <table class="memname">
    234. 

  234.         <tr>
    235. 

  235.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_1024_q15[1536]</td>
    236. 

  236.         </tr>
    237. 

  237.       </table>
    238. 

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

  239. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    240. 

  240. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    241. 

  241. {
    242. 

  242.    twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
    243. 

  243.    twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
    244. 

  244. } </pre> </dd></dl>
    245. 

  245. <dl class="section user"><dt></dt><dd>where N = 1024 and PI = 3.14159265358979 </dd></dl>
    246. 

  246. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    247. 

  247. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    248. 

  248. 

  249. </div>
    250. 

  250. </div>
    251. 

  251. <a class="anchor" id="ga514443c44b62b8b3d240afefebcda310"></a>
    252. 

  252. <div class="memitem">
    253. 

  253. <div class="memproto">
    254. 

  254.       <table class="memname">
    255. 

  255.         <tr>
    256. 

  256.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_1024_q31[1536]</td>
    257. 

  257.         </tr>
    258. 

  258.       </table>
    259. 

  259. </div><div class="memdoc">
    260. 

  260. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    261. 

  261. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    262. 

  262. {
    263. 

  263.    twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
    264. 

  264.    twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
    265. 

  265. } </pre> </dd></dl>
    266. 

  266. <dl class="section user"><dt></dt><dd>where N = 1024 and PI = 3.14159265358979 </dd></dl>
    267. 

  267. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    268. 

  268. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    269. 

  269. 

  270. </div>
    271. 

  271. </div>
    272. 

  272. <a class="anchor" id="ga948433536dafaac1381decfccf4e2d9c"></a>
    273. 

  273. <div class="memitem">
    274. 

  274. <div class="memproto">
    275. 

  275.       <table class="memname">
    276. 

  276.         <tr>
    277. 

  277.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_128[256]</td>
    278. 

  278.         </tr>
    279. 

  279.       </table>
    280. 

  280. </div><div class="memdoc">
    281. 

  281. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    282. 

  282. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    283. 

  283. {
    284. 

  284.       twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
    285. 

  285.       twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
    286. 

  286. } </pre> </dd></dl>
    287. 

  287. <dl class="section user"><dt></dt><dd>where N = 128 and PI = 3.14159265358979 </dd></dl>
    288. 

  288. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    289. 

  289. 

  290. <p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
    291. 

  291. 

  292. </div>
    293. 

  293. </div>
    294. 

  294. <a class="anchor" id="gabfdd1c5cd2b3f96da5fe5f07c707a8e5"></a>
    295. 

  295. <div class="memitem">
    296. 

  296. <div class="memproto">
    297. 

  297.       <table class="memname">
    298. 

  298.         <tr>
    299. 

  299.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_128_q15[192]</td>
    300. 

  300.         </tr>
    301. 

  301.       </table>
    302. 

  302. </div><div class="memdoc">
    303. 

  303. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    304. 

  304. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    305. 

  305. {
    306. 

  306.    twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
    307. 

  307.    twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
    308. 

  308. } </pre> </dd></dl>
    309. 

  309. <dl class="section user"><dt></dt><dd>where N = 128 and PI = 3.14159265358979 </dd></dl>
    310. 

  310. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    311. 

  311. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    312. 

  312. 

  313. </div>
    314. 

  314. </div>
    315. 

  315. <a class="anchor" id="gafecf9ed9873415d9f5f17f37b30c7250"></a>
    316. 

  316. <div class="memitem">
    317. 

  317. <div class="memproto">
    318. 

  318.       <table class="memname">
    319. 

  319.         <tr>
    320. 

  320.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_128_q31[192]</td>
    321. 

  321.         </tr>
    322. 

  322.       </table>
    323. 

  323. </div><div class="memdoc">
    324. 

  324. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    325. 

  325. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    326. 

  326. {
    327. 

  327.    twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
    328. 

  328.    twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
    329. 

  329. } </pre> </dd></dl>
    330. 

  330. <dl class="section user"><dt></dt><dd>where N = 128 and PI = 3.14159265358979 </dd></dl>
    331. 

  331. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    332. 

  332. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    333. 

  333. 

  334. </div>
    335. 

  335. </div>
    336. 

  336. <a class="anchor" id="gae75e243ec61706427314270f222e0c8e"></a>
    337. 

  337. <div class="memitem">
    338. 

  338. <div class="memproto">
    339. 

  339.       <table class="memname">
    340. 

  340.         <tr>
    341. 

  341.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_16[32]</td>
    342. 

  342.         </tr>
    343. 

  343.       </table>
    344. 

  344. </div><div class="memdoc">
    345. 

  345. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    346. 

  346. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    347. 

  347. {
    348. 

  348.       twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
    349. 

  349.       twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
    350. 

  350. } </pre> </dd></dl>
    351. 

  351. <dl class="section user"><dt></dt><dd>where N = 16 and PI = 3.14159265358979 </dd></dl>
    352. 

  352. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    353. 

  353. 

  354. <p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
    355. 

  355. 

  356. </div>
    357. 

  357. </div>
    358. 

  358. <a class="anchor" id="ga8e4e2e05f4a3112184c96cb3308d6c39"></a>
    359. 

  359. <div class="memitem">
    360. 

  360. <div class="memproto">
    361. 

  361.       <table class="memname">
    362. 

  362.         <tr>
    363. 

  363.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_16_q15[24]</td>
    364. 

  364.         </tr>
    365. 

  365.       </table>
    366. 

  366. </div><div class="memdoc">
    367. 

  367. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    368. 

  368. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    369. 

  369. {
    370. 

  370.    twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
    371. 

  371.    twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
    372. 

  372. } </pre> </dd></dl>
    373. 

  373. <dl class="section user"><dt></dt><dd>where N = 16 and PI = 3.14159265358979 </dd></dl>
    374. 

  374. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    375. 

  375. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    376. 

  376. 

  377. </div>
    378. 

  378. </div>
    379. 

  379. <a class="anchor" id="gaef4697e1ba348c4ac9358f2b9e279e93"></a>
    380. 

  380. <div class="memitem">
    381. 

  381. <div class="memproto">
    382. 

  382.       <table class="memname">
    383. 

  383.         <tr>
    384. 

  384.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_16_q31[24]</td>
    385. 

  385.         </tr>
    386. 

  386.       </table>
    387. 

  387. </div><div class="memdoc">
    388. 

  388. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    389. 

  389. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    390. 

  390. {
    391. 

  391.    twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
    392. 

  392.    twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
    393. 

  393. } </pre> </dd></dl>
    394. 

  394. <dl class="section user"><dt></dt><dd>where N = 16 and PI = 3.14159265358979 </dd></dl>
    395. 

  395. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    396. 

  396. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    397. 

  397. 

  398. </div>
    399. 

  399. </div>
    400. 

  400. <a class="anchor" id="ga23e7f30421a7905b21c2015429779633"></a>
    401. 

  401. <div class="memitem">
    402. 

  402. <div class="memproto">
    403. 

  403.       <table class="memname">
    404. 

  404.         <tr>
    405. 

  405.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_2048[4096]</td>
    406. 

  406.         </tr>
    407. 

  407.       </table>
    408. 

  408. </div><div class="memdoc">
    409. 

  409. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    410. 

  410. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    411. 

  411. {
    412. 

  412.       twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
    413. 

  413.       twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
    414. 

  414. } </pre> </dd></dl>
    415. 

  415. <dl class="section user"><dt></dt><dd>where N = 2048 and PI = 3.14159265358979 </dd></dl>
    416. 

  416. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    417. 

  417. 

  418. <p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
    419. 

  419. 

  420. </div>
    421. 

  421. </div>
    422. 

  422. <a class="anchor" id="gadd16ce08ffd1048c385e0534a3b19cbb"></a>
    423. 

  423. <div class="memitem">
    424. 

  424. <div class="memproto">
    425. 

  425.       <table class="memname">
    426. 

  426.         <tr>
    427. 

  427.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_2048_q15[3072]</td>
    428. 

  428.         </tr>
    429. 

  429.       </table>
    430. 

  430. </div><div class="memdoc">
    431. 

  431. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    432. 

  432. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    433. 

  433. {
    434. 

  434.    twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
    435. 

  435.    twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
    436. 

  436. } </pre> </dd></dl>
    437. 

  437. <dl class="section user"><dt></dt><dd>where N = 2048 and PI = 3.14159265358979 </dd></dl>
    438. 

  438. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    439. 

  439. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    440. 

  440. 

  441. </div>
    442. 

  442. </div>
    443. 

  443. <a class="anchor" id="ga9c5767de9f5a409fd0c2027e6ac67179"></a>
    444. 

  444. <div class="memitem">
    445. 

  445. <div class="memproto">
    446. 

  446.       <table class="memname">
    447. 

  447.         <tr>
    448. 

  448.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_2048_q31[3072]</td>
    449. 

  449.         </tr>
    450. 

  450.       </table>
    451. 

  451. </div><div class="memdoc">
    452. 

  452. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    453. 

  453. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    454. 

  454. {
    455. 

  455.    twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
    456. 

  456.    twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
    457. 

  457. } </pre> </dd></dl>
    458. 

  458. <dl class="section user"><dt></dt><dd>where N = 2048 and PI = 3.14159265358979 </dd></dl>
    459. 

  459. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    460. 

  460. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    461. 

  461. 

  462. </div>
    463. 

  463. </div>
    464. 

  464. <a class="anchor" id="gafe813758a03a798e972359a092315be4"></a>
    465. 

  465. <div class="memitem">
    466. 

  466. <div class="memproto">
    467. 

  467.       <table class="memname">
    468. 

  468.         <tr>
    469. 

  469.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_256[512]</td>
    470. 

  470.         </tr>
    471. 

  471.       </table>
    472. 

  472. </div><div class="memdoc">
    473. 

  473. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    474. 

  474. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    475. 

  475. {
    476. 

  476.       twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
    477. 

  477.       twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
    478. 

  478. } </pre> </dd></dl>
    479. 

  479. <dl class="section user"><dt></dt><dd>where N = 256 and PI = 3.14159265358979 </dd></dl>
    480. 

  480. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    481. 

  481. 

  482. <p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
    483. 

  483. 

  484. </div>
    485. 

  485. </div>
    486. 

  486. <a class="anchor" id="ga6099ae5262a0a3a8d9ce1e6da02f0c2e"></a>
    487. 

  487. <div class="memitem">
    488. 

  488. <div class="memproto">
    489. 

  489.       <table class="memname">
    490. 

  490.         <tr>
    491. 

  491.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_256_q15[384]</td>
    492. 

  492.         </tr>
    493. 

  493.       </table>
    494. 

  494. </div><div class="memdoc">
    495. 

  495. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    496. 

  496. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    497. 

  497. {
    498. 

  498.    twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
    499. 

  499.    twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
    500. 

  500. } </pre> </dd></dl>
    501. 

  501. <dl class="section user"><dt></dt><dd>where N = 256 and PI = 3.14159265358979 </dd></dl>
    502. 

  502. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    503. 

  503. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    504. 

  504. 

  505. </div>
    506. 

  506. </div>
    507. 

  507. <a class="anchor" id="gaef1ea005053b715b851cf5f908168ede"></a>
    508. 

  508. <div class="memitem">
    509. 

  509. <div class="memproto">
    510. 

  510.       <table class="memname">
    511. 

  511.         <tr>
    512. 

  512.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_256_q31[384]</td>
    513. 

  513.         </tr>
    514. 

  514.       </table>
    515. 

  515. </div><div class="memdoc">
    516. 

  516. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    517. 

  517. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    518. 

  518. {
    519. 

  519.    twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
    520. 

  520.    twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
    521. 

  521. } </pre> </dd></dl>
    522. 

  522. <dl class="section user"><dt></dt><dd>where N = 256 and PI = 3.14159265358979 </dd></dl>
    523. 

  523. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    524. 

  524. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    525. 

  525. 

  526. </div>
    527. 

  527. </div>
    528. 

  528. <a class="anchor" id="ga78a72c85d88185de98050c930cfc76e3"></a>
    529. 

  529. <div class="memitem">
    530. 

  530. <div class="memproto">
    531. 

  531.       <table class="memname">
    532. 

  532.         <tr>
    533. 

  533.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_32[64]</td>
    534. 

  534.         </tr>
    535. 

  535.       </table>
    536. 

  536. </div><div class="memdoc">
    537. 

  537. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    538. 

  538. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    539. 

  539. {
    540. 

  540.       twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
    541. 

  541.       twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
    542. 

  542. } </pre> </dd></dl>
    543. 

  543. <dl class="section user"><dt></dt><dd>where N = 32 and PI = 3.14159265358979 </dd></dl>
    544. 

  544. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    545. 

  545. 

  546. <p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
    547. 

  547. 

  548. </div>
    549. 

  549. </div>
    550. 

  550. <a class="anchor" id="gac194a4fe04a19051ae1811f69c6e5df2"></a>
    551. 

  551. <div class="memitem">
    552. 

  552. <div class="memproto">
    553. 

  553.       <table class="memname">
    554. 

  554.         <tr>
    555. 

  555.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_32_q15[48]</td>
    556. 

  556.         </tr>
    557. 

  557.       </table>
    558. 

  558. </div><div class="memdoc">
    559. 

  559. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    560. 

  560. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    561. 

  561. {
    562. 

  562.    twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
    563. 

  563.    twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
    564. 

  564. } </pre> </dd></dl>
    565. 

  565. <dl class="section user"><dt></dt><dd>where N = 32 and PI = 3.14159265358979 </dd></dl>
    566. 

  566. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    567. 

  567. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    568. 

  568. 

  569. </div>
    570. 

  570. </div>
    571. 

  571. <a class="anchor" id="ga8ba78d5e6ef4bdc58e8f0044e0664a0a"></a>
    572. 

  572. <div class="memitem">
    573. 

  573. <div class="memproto">
    574. 

  574.       <table class="memname">
    575. 

  575.         <tr>
    576. 

  576.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_32_q31[48]</td>
    577. 

  577.         </tr>
    578. 

  578.       </table>
    579. 

  579. </div><div class="memdoc">
    580. 

  580. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    581. 

  581. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    582. 

  582. {
    583. 

  583.    twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
    584. 

  584.    twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
    585. 

  585. } </pre> </dd></dl>
    586. 

  586. <dl class="section user"><dt></dt><dd>where N = 32 and PI = 3.14159265358979 </dd></dl>
    587. 

  587. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    588. 

  588. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    589. 

  589. 

  590. </div>
    591. 

  591. </div>
    592. 

  592. <a class="anchor" id="gae0182d1dd3b2f21aad4e38a815a0bd40"></a>
    593. 

  593. <div class="memitem">
    594. 

  594. <div class="memproto">
    595. 

  595.       <table class="memname">
    596. 

  596.         <tr>
    597. 

  597.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_4096[8192]</td>
    598. 

  598.         </tr>
    599. 

  599.       </table>
    600. 

  600. </div><div class="memdoc">
    601. 

  601. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    602. 

  602. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    603. 

  603. {
    604. 

  604.       twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
    605. 

  605.       twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
    606. 

  606. } </pre> </dd></dl>
    607. 

  607. <dl class="section user"><dt></dt><dd>where N = 4096 and PI = 3.14159265358979 </dd></dl>
    608. 

  608. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    609. 

  609. 

  610. </div>
    611. 

  611. </div>
    612. 

  612. <a class="anchor" id="ga9b409d6995eab17805b1d1881d4bc652"></a>
    613. 

  613. <div class="memitem">
    614. 

  614. <div class="memproto">
    615. 

  615.       <table class="memname">
    616. 

  616.         <tr>
    617. 

  617.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_4096_q15[6144]</td>
    618. 

  618.         </tr>
    619. 

  619.       </table>
    620. 

  620. </div><div class="memdoc">
    621. 

  621. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    622. 

  622. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    623. 

  623. {
    624. 

  624.    twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
    625. 

  625.    twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
    626. 

  626. } </pre> </dd></dl>
    627. 

  627. <dl class="section user"><dt></dt><dd>where N = 4096 and PI = 3.14159265358979 </dd></dl>
    628. 

  628. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    629. 

  629. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    630. 

  630. 

  631. <p>Referenced by <a class="el" href="group__ComplexFFT.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, and <a class="el" href="group__ComplexFFT.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>.</p>
    632. 

  632. 

  633. </div>
    634. 

  634. </div>
    635. 

  635. <a class="anchor" id="ga67c0890317deab3391e276f22c1fc400"></a>
    636. 

  636. <div class="memitem">
    637. 

  637. <div class="memproto">
    638. 

  638.       <table class="memname">
    639. 

  639.         <tr>
    640. 

  640.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_4096_q31[6144]</td>
    641. 

  641.         </tr>
    642. 

  642.       </table>
    643. 

  643. </div><div class="memdoc">
    644. 

  644. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    645. 

  645. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    646. 

  646. {
    647. 

  647.    twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
    648. 

  648.    twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
    649. 

  649. } </pre> </dd></dl>
    650. 

  650. <dl class="section user"><dt></dt><dd>where N = 4096 and PI = 3.14159265358979 </dd></dl>
    651. 

  651. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    652. 

  652. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    653. 

  653. 

  654. <p>Referenced by <a class="el" href="group__ComplexFFT.html#gabec9611e77382f31e152668bf6b4b638">arm_cfft_radix2_init_q31()</a>, and <a class="el" href="group__ComplexFFT.html#gad5caaafeec900c8ff72321c01bbd462c">arm_cfft_radix4_init_q31()</a>.</p>
    655. 

  655. 

  656. </div>
    657. 

  657. </div>
    658. 

  658. <a class="anchor" id="gad8830f0c068ab2cc19f2f87d220fa148"></a>
    659. 

  659. <div class="memitem">
    660. 

  660. <div class="memproto">
    661. 

  661.       <table class="memname">
    662. 

  662.         <tr>
    663. 

  663.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_512[1024]</td>
    664. 

  664.         </tr>
    665. 

  665.       </table>
    666. 

  666. </div><div class="memdoc">
    667. 

  667. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    668. 

  668. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    669. 

  669. {
    670. 

  670.       twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
    671. 

  671.       twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
    672. 

  672. } </pre> </dd></dl>
    673. 

  673. <dl class="section user"><dt></dt><dd>where N = 512 and PI = 3.14159265358979 </dd></dl>
    674. 

  674. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    675. 

  675. 

  676. <p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
    677. 

  677. 

  678. </div>
    679. 

  679. </div>
    680. 

  680. <a class="anchor" id="ga6152621af210f847128c6f38958fa385"></a>
    681. 

  681. <div class="memitem">
    682. 

  682. <div class="memproto">
    683. 

  683.       <table class="memname">
    684. 

  684.         <tr>
    685. 

  685.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_512_q15[768]</td>
    686. 

  686.         </tr>
    687. 

  687.       </table>
    688. 

  688. </div><div class="memdoc">
    689. 

  689. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    690. 

  690. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    691. 

  691. {
    692. 

  692.    twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
    693. 

  693.    twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
    694. 

  694. } </pre> </dd></dl>
    695. 

  695. <dl class="section user"><dt></dt><dd>where N = 512 and PI = 3.14159265358979 </dd></dl>
    696. 

  696. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    697. 

  697. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    698. 

  698. 

  699. </div>
    700. 

  700. </div>
    701. 

  701. <a class="anchor" id="ga416c61b2f08542a39111e06b0378bebe"></a>
    702. 

  702. <div class="memitem">
    703. 

  703. <div class="memproto">
    704. 

  704.       <table class="memname">
    705. 

  705.         <tr>
    706. 

  706.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_512_q31[768]</td>
    707. 

  707.         </tr>
    708. 

  708.       </table>
    709. 

  709. </div><div class="memdoc">
    710. 

  710. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    711. 

  711. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    712. 

  712. {
    713. 

  713.    twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
    714. 

  714.    twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
    715. 

  715. } </pre> </dd></dl>
    716. 

  716. <dl class="section user"><dt></dt><dd>where N = 512 and PI = 3.14159265358979 </dd></dl>
    717. 

  717. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    718. 

  718. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    719. 

  719. 

  720. </div>
    721. 

  721. </div>
    722. 

  722. <a class="anchor" id="ga4f3c6d98c7e66393b4ef3ac63746e43d"></a>
    723. 

  723. <div class="memitem">
    724. 

  724. <div class="memproto">
    725. 

  725.       <table class="memname">
    726. 

  726.         <tr>
    727. 

  727.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_64[128]</td>
    728. 

  728.         </tr>
    729. 

  729.       </table>
    730. 

  730. </div><div class="memdoc">
    731. 

  731. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    732. 

  732. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    733. 

  733. {
    734. 

  734.       twiddleCoef[2*i]= cos(i * 2*PI/(float)N);
    735. 

  735.       twiddleCoef[2*i+1]= sin(i * 2*PI/(float)N);
    736. 

  736. } </pre> </dd></dl>
    737. 

  737. <dl class="section user"><dt></dt><dd>where N = 64 and PI = 3.14159265358979 </dd></dl>
    738. 

  738. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    739. 

  739. 

  740. <p>Referenced by <a class="el" href="group__RealFFT.html#gac5fceb172551e7c11eb4d0e17ef15aa3">arm_rfft_fast_init_f32()</a>.</p>
    741. 

  741. 

  742. </div>
    743. 

  743. </div>
    744. 

  744. <a class="anchor" id="gaa0cc411e0b3c82078e85cfdf1b84290f"></a>
    745. 

  745. <div class="memitem">
    746. 

  746. <div class="memproto">
    747. 

  747.       <table class="memname">
    748. 

  748.         <tr>
    749. 

  749.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_64_q15[96]</td>
    750. 

  750.         </tr>
    751. 

  751.       </table>
    752. 

  752. </div><div class="memdoc">
    753. 

  753. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    754. 

  754. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    755. 

  755. {
    756. 

  756.    twiddleCoefq15[2*i]= cos(i * 2*PI/(float)N);
    757. 

  757.    twiddleCoefq15[2*i+1]= sin(i * 2*PI/(float)N);
    758. 

  758. } </pre> </dd></dl>
    759. 

  759. <dl class="section user"><dt></dt><dd>where N = 64 and PI = 3.14159265358979 </dd></dl>
    760. 

  760. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    761. 

  761. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    762. 

  762. 

  763. </div>
    764. 

  764. </div>
    765. 

  765. <a class="anchor" id="ga6e0a7e941a25a0d74b2e6590307de47e"></a>
    766. 

  766. <div class="memitem">
    767. 

  767. <div class="memproto">
    768. 

  768.       <table class="memname">
    769. 

  769.         <tr>
    770. 

  770.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_64_q31[96]</td>
    771. 

  771.         </tr>
    772. 

  772.       </table>
    773. 

  773. </div><div class="memdoc">
    774. 

  774. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    775. 

  775. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; 3N/4; i++)
    776. 

  776. {
    777. 

  777.    twiddleCoefQ31[2*i]= cos(i * 2*PI/(float)N);
    778. 

  778.    twiddleCoefQ31[2*i+1]= sin(i * 2*PI/(float)N);
    779. 

  779. } </pre> </dd></dl>
    780. 

  780. <dl class="section user"><dt></dt><dd>where N = 64 and PI = 3.14159265358979 </dd></dl>
    781. 

  781. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    782. 

  782. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    783. 

  783. 

  784. </div>
    785. 

  785. </div>
    786. 

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