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    113. 

  113. <div class="title">arm_cfft_q15.c File Reference</div>  </div>
    114. 

  114. </div><!--header-->
    115. 

  115. <div class="contents">
    116. 

  116. <table class="memberdecls">
    117. 

  117. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
    118. 

  118. Functions</h2></td></tr>
    119. 

  119. <tr class="memitem:abf1a2f9aa9f44ad5da1f0dbae8b54f2f"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__q15_8c.html#abf1a2f9aa9f44ad5da1f0dbae8b54f2f">arm_radix4_butterfly_q15</a> (<a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrc, uint32_t fftLen, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pCoef, uint32_t twidCoefModifier)</td></tr>
    120. 

  120. <tr class="memdesc:abf1a2f9aa9f44ad5da1f0dbae8b54f2f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Core function for the Q15 CFFT butterfly process.  <a href="#abf1a2f9aa9f44ad5da1f0dbae8b54f2f"></a><br/></td></tr>
    121. 

  121. <tr class="separator:abf1a2f9aa9f44ad5da1f0dbae8b54f2f"><td class="memSeparator" colspan="2">&#160;</td></tr>
    122. 

  122. <tr class="memitem:a734ecff00f21a6a10e9ec437c8987eb1"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__q15_8c.html#a734ecff00f21a6a10e9ec437c8987eb1">arm_radix4_butterfly_inverse_q15</a> (<a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrc, uint32_t fftLen, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pCoef, uint32_t twidCoefModifier)</td></tr>
    123. 

  123. <tr class="memdesc:a734ecff00f21a6a10e9ec437c8987eb1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Core function for the Q15 CIFFT butterfly process.  <a href="#a734ecff00f21a6a10e9ec437c8987eb1"></a><br/></td></tr>
    124. 

  124. <tr class="separator:a734ecff00f21a6a10e9ec437c8987eb1"><td class="memSeparator" colspan="2">&#160;</td></tr>
    125. 

  125. <tr class="memitem:a773957c278f4d9e728711f27e8a6e278"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__q15_8c.html#a773957c278f4d9e728711f27e8a6e278">arm_bitreversal_16</a> (uint16_t *pSrc, const uint16_t bitRevLen, const uint16_t *pBitRevTable)</td></tr>
    126. 

  126. <tr class="separator:a773957c278f4d9e728711f27e8a6e278"><td class="memSeparator" colspan="2">&#160;</td></tr>
    127. 

  127. <tr class="memitem:af1d4a751153857c173511e0c77ab4fa9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__q15_8c.html#af1d4a751153857c173511e0c77ab4fa9">arm_cfft_radix4by2_q15</a> (<a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrc, uint32_t fftLen, const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pCoef)</td></tr>
    128. 

  128. <tr class="separator:af1d4a751153857c173511e0c77ab4fa9"><td class="memSeparator" colspan="2">&#160;</td></tr>
    129. 

  129. <tr class="memitem:abe669acc8db57d1fb9b1e2bba30f2224"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__q15_8c.html#abe669acc8db57d1fb9b1e2bba30f2224">arm_cfft_radix4by2_inverse_q15</a> (<a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrc, uint32_t fftLen, const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pCoef)</td></tr>
    130. 

  130. <tr class="separator:abe669acc8db57d1fb9b1e2bba30f2224"><td class="memSeparator" colspan="2">&#160;</td></tr>
    131. 

  131. <tr class="memitem:ga68cdacd2267a2967955e40e6b7ec1229"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___complex_f_f_t.html#ga68cdacd2267a2967955e40e6b7ec1229">arm_cfft_q15</a> (const <a class="el" href="structarm__cfft__instance__q15.html">arm_cfft_instance_q15</a> *S, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *p1, uint8_t <a class="el" href="_g_c_c_2arm__fft__bin__example__f32_8c.html#a379ccb99013d369a41b49619083c16ef">ifftFlag</a>, uint8_t bitReverseFlag)</td></tr>
    132. 

  132. <tr class="memdesc:ga68cdacd2267a2967955e40e6b7ec1229"><td class="mdescLeft">&#160;</td><td class="mdescRight">Processing function for the floating-point complex FFT.  <a href="group___complex_f_f_t.html#ga68cdacd2267a2967955e40e6b7ec1229"></a><br/></td></tr>
    133. 

  133. <tr class="separator:ga68cdacd2267a2967955e40e6b7ec1229"><td class="memSeparator" colspan="2">&#160;</td></tr>
    134. 

  134. </table>
    135. 

  135. <h2 class="groupheader">Function Documentation</h2>
    136. 

  136. <a class="anchor" id="a773957c278f4d9e728711f27e8a6e278"></a>
    137. 

  137. <div class="memitem">
    138. 

  138. <div class="memproto">
    139. 

  139.       <table class="memname">
    140. 

  140.         <tr>
    141. 

  141.           <td class="memname">void arm_bitreversal_16 </td>
    142. 

  142.           <td>(</td>
    143. 

  143.           <td class="paramtype">uint16_t *&#160;</td>
    144. 

  144.           <td class="paramname"><em>pSrc</em>, </td>
    145. 

  145.         </tr>
    146. 

  146.         <tr>
    147. 

  147.           <td class="paramkey"></td>
    148. 

  148.           <td></td>
    149. 

  149.           <td class="paramtype">const uint16_t&#160;</td>
    150. 

  150.           <td class="paramname"><em>bitRevLen</em>, </td>
    151. 

  151.         </tr>
    152. 

  152.         <tr>
    153. 

  153.           <td class="paramkey"></td>
    154. 

  154.           <td></td>
    155. 

  155.           <td class="paramtype">const uint16_t *&#160;</td>
    156. 

  156.           <td class="paramname"><em>pBitRevTable</em>&#160;</td>
    157. 

  157.         </tr>
    158. 

  158.         <tr>
    159. 

  159.           <td></td>
    160. 

  160.           <td>)</td>
    161. 

  161.           <td></td><td></td>
    162. 

  162.         </tr>
    163. 

  163.       </table>
    164. 

  164. </div><div class="memdoc">
    165. 

  165. 

  166. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga68cdacd2267a2967955e40e6b7ec1229">arm_cfft_q15()</a>.</p>
    167. 

  167. 

  168. </div>
    169. 

  169. </div>
    170. 

  170. <a class="anchor" id="abe669acc8db57d1fb9b1e2bba30f2224"></a>
    171. 

  171. <div class="memitem">
    172. 

  172. <div class="memproto">
    173. 

  173.       <table class="memname">
    174. 

  174.         <tr>
    175. 

  175.           <td class="memname">void arm_cfft_radix4by2_inverse_q15 </td>
    176. 

  176.           <td>(</td>
    177. 

  177.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    178. 

  178.           <td class="paramname"><em>pSrc</em>, </td>
    179. 

  179.         </tr>
    180. 

  180.         <tr>
    181. 

  181.           <td class="paramkey"></td>
    182. 

  182.           <td></td>
    183. 

  183.           <td class="paramtype">uint32_t&#160;</td>
    184. 

  184.           <td class="paramname"><em>fftLen</em>, </td>
    185. 

  185.         </tr>
    186. 

  186.         <tr>
    187. 

  187.           <td class="paramkey"></td>
    188. 

  188.           <td></td>
    189. 

  189.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    190. 

  190.           <td class="paramname"><em>pCoef</em>&#160;</td>
    191. 

  191.         </tr>
    192. 

  192.         <tr>
    193. 

  193.           <td></td>
    194. 

  194.           <td>)</td>
    195. 

  195.           <td></td><td></td>
    196. 

  196.         </tr>
    197. 

  197.       </table>
    198. 

  198. </div><div class="memdoc">
    199. 

  199. 

  200. <p>References <a class="el" href="arm__math_8h.html#af0d54ec57b936994a34f073d0049ea3f">_SIMD32_OFFSET</a>, and <a class="el" href="arm__cfft__q15_8c.html#a734ecff00f21a6a10e9ec437c8987eb1">arm_radix4_butterfly_inverse_q15()</a>.</p>
    201. 

  201. 

  202. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga68cdacd2267a2967955e40e6b7ec1229">arm_cfft_q15()</a>.</p>
    203. 

  203. 

  204. </div>
    205. 

  205. </div>
    206. 

  206. <a class="anchor" id="af1d4a751153857c173511e0c77ab4fa9"></a>
    207. 

  207. <div class="memitem">
    208. 

  208. <div class="memproto">
    209. 

  209.       <table class="memname">
    210. 

  210.         <tr>
    211. 

  211.           <td class="memname">void arm_cfft_radix4by2_q15 </td>
    212. 

  212.           <td>(</td>
    213. 

  213.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    214. 

  214.           <td class="paramname"><em>pSrc</em>, </td>
    215. 

  215.         </tr>
    216. 

  216.         <tr>
    217. 

  217.           <td class="paramkey"></td>
    218. 

  218.           <td></td>
    219. 

  219.           <td class="paramtype">uint32_t&#160;</td>
    220. 

  220.           <td class="paramname"><em>fftLen</em>, </td>
    221. 

  221.         </tr>
    222. 

  222.         <tr>
    223. 

  223.           <td class="paramkey"></td>
    224. 

  224.           <td></td>
    225. 

  225.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    226. 

  226.           <td class="paramname"><em>pCoef</em>&#160;</td>
    227. 

  227.         </tr>
    228. 

  228.         <tr>
    229. 

  229.           <td></td>
    230. 

  230.           <td>)</td>
    231. 

  231.           <td></td><td></td>
    232. 

  232.         </tr>
    233. 

  233.       </table>
    234. 

  234. </div><div class="memdoc">
    235. 

  235. <p>end of ComplexFFT group </p>
    236. 

  236. 

  237. <p>References <a class="el" href="arm__math_8h.html#af0d54ec57b936994a34f073d0049ea3f">_SIMD32_OFFSET</a>, and <a class="el" href="arm__cfft__q15_8c.html#abf1a2f9aa9f44ad5da1f0dbae8b54f2f">arm_radix4_butterfly_q15()</a>.</p>
    238. 

  238. 

  239. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga68cdacd2267a2967955e40e6b7ec1229">arm_cfft_q15()</a>.</p>
    240. 

  240. 

  241. </div>
    242. 

  242. </div>
    243. 

  243. <a class="anchor" id="a734ecff00f21a6a10e9ec437c8987eb1"></a>
    244. 

  244. <div class="memitem">
    245. 

  245. <div class="memproto">
    246. 

  246.       <table class="memname">
    247. 

  247.         <tr>
    248. 

  248.           <td class="memname">void arm_radix4_butterfly_inverse_q15 </td>
    249. 

  249.           <td>(</td>
    250. 

  250.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    251. 

  251.           <td class="paramname"><em>pSrc16</em>, </td>
    252. 

  252.         </tr>
    253. 

  253.         <tr>
    254. 

  254.           <td class="paramkey"></td>
    255. 

  255.           <td></td>
    256. 

  256.           <td class="paramtype">uint32_t&#160;</td>
    257. 

  257.           <td class="paramname"><em>fftLen</em>, </td>
    258. 

  258.         </tr>
    259. 

  259.         <tr>
    260. 

  260.           <td class="paramkey"></td>
    261. 

  261.           <td></td>
    262. 

  262.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    263. 

  263.           <td class="paramname"><em>pCoef16</em>, </td>
    264. 

  264.         </tr>
    265. 

  265.         <tr>
    266. 

  266.           <td class="paramkey"></td>
    267. 

  267.           <td></td>
    268. 

  268.           <td class="paramtype">uint32_t&#160;</td>
    269. 

  269.           <td class="paramname"><em>twidCoefModifier</em>&#160;</td>
    270. 

  270.         </tr>
    271. 

  271.         <tr>
    272. 

  272.           <td></td>
    273. 

  273.           <td>)</td>
    274. 

  274.           <td></td><td></td>
    275. 

  275.         </tr>
    276. 

  276.       </table>
    277. 

  277. </div><div class="memdoc">
    278. 

  278. <dl class="params"><dt>Parameters</dt><dd>
    279. 

  279.   <table class="params">
    280. 

  280.     <tr><td class="paramdir">[in,out]</td><td class="paramname">*pSrc16</td><td>points to the in-place buffer of Q15 data type. </td></tr>
    281. 

  281.     <tr><td class="paramdir">[in]</td><td class="paramname">fftLen</td><td>length of the FFT. </td></tr>
    282. 

  282.     <tr><td class="paramdir">[in]</td><td class="paramname">*pCoef16</td><td>points to twiddle coefficient buffer. </td></tr>
    283. 

  283.     <tr><td class="paramdir">[in]</td><td class="paramname">twidCoefModifier</td><td>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </td></tr>
    284. 

  284.   </table>
    285. 

  285.   </dd>
    286. 

  286. </dl>
    287. 

  287. <dl class="section return"><dt>Returns</dt><dd>none. </dd></dl>
    288. 

  288. 

  289. <p>References <a class="el" href="arm__math_8h.html#a9de2e0a5785be82866bcb96012282248">__SIMD32</a>, and <a class="el" href="arm__math_8h.html#af0d54ec57b936994a34f073d0049ea3f">_SIMD32_OFFSET</a>.</p>
    290. 

  290. 

  291. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga68cdacd2267a2967955e40e6b7ec1229">arm_cfft_q15()</a>, <a class="el" href="group___complex_f_f_t.html#ga8d66cdac41b8bf6cefdb895456eee84a">arm_cfft_radix4_q15()</a>, and <a class="el" href="arm__cfft__q15_8c.html#abe669acc8db57d1fb9b1e2bba30f2224">arm_cfft_radix4by2_inverse_q15()</a>.</p>
    292. 

  292. 

  293. </div>
    294. 

  294. </div>
    295. 

  295. <a class="anchor" id="abf1a2f9aa9f44ad5da1f0dbae8b54f2f"></a>
    296. 

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

  297. <div class="memproto">
    298. 

  298.       <table class="memname">
    299. 

  299.         <tr>
    300. 

  300.           <td class="memname">void arm_radix4_butterfly_q15 </td>
    301. 

  301.           <td>(</td>
    302. 

  302.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    303. 

  303.           <td class="paramname"><em>pSrc16</em>, </td>
    304. 

  304.         </tr>
    305. 

  305.         <tr>
    306. 

  306.           <td class="paramkey"></td>
    307. 

  307.           <td></td>
    308. 

  308.           <td class="paramtype">uint32_t&#160;</td>
    309. 

  309.           <td class="paramname"><em>fftLen</em>, </td>
    310. 

  310.         </tr>
    311. 

  311.         <tr>
    312. 

  312.           <td class="paramkey"></td>
    313. 

  313.           <td></td>
    314. 

  314.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    315. 

  315.           <td class="paramname"><em>pCoef16</em>, </td>
    316. 

  316.         </tr>
    317. 

  317.         <tr>
    318. 

  318.           <td class="paramkey"></td>
    319. 

  319.           <td></td>
    320. 

  320.           <td class="paramtype">uint32_t&#160;</td>
    321. 

  321.           <td class="paramname"><em>twidCoefModifier</em>&#160;</td>
    322. 

  322.         </tr>
    323. 

  323.         <tr>
    324. 

  324.           <td></td>
    325. 

  325.           <td>)</td>
    326. 

  326.           <td></td><td></td>
    327. 

  327.         </tr>
    328. 

  328.       </table>
    329. 

  329. </div><div class="memdoc">
    330. 

  330. <p>end of ComplexFFT group </p>
    331. 

  331. <dl class="params"><dt>Parameters</dt><dd>
    332. 

  332.   <table class="params">
    333. 

  333.     <tr><td class="paramdir">[in,out]</td><td class="paramname">*pSrc16</td><td>points to the in-place buffer of Q15 data type. </td></tr>
    334. 

  334.     <tr><td class="paramdir">[in]</td><td class="paramname">fftLen</td><td>length of the FFT. </td></tr>
    335. 

  335.     <tr><td class="paramdir">[in]</td><td class="paramname">*pCoef16</td><td>points to twiddle coefficient buffer. </td></tr>
    336. 

  336.     <tr><td class="paramdir">[in]</td><td class="paramname">twidCoefModifier</td><td>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </td></tr>
    337. 

  337.   </table>
    338. 

  338.   </dd>
    339. 

  339. </dl>
    340. 

  340. <dl class="section return"><dt>Returns</dt><dd>none. </dd></dl>
    341. 

  341. 

  342. <p>References <a class="el" href="arm__math_8h.html#a9de2e0a5785be82866bcb96012282248">__SIMD32</a>, and <a class="el" href="arm__math_8h.html#af0d54ec57b936994a34f073d0049ea3f">_SIMD32_OFFSET</a>.</p>
    343. 

  343. 

  344. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga68cdacd2267a2967955e40e6b7ec1229">arm_cfft_q15()</a>, <a class="el" href="group___complex_f_f_t.html#ga8d66cdac41b8bf6cefdb895456eee84a">arm_cfft_radix4_q15()</a>, and <a class="el" href="arm__cfft__q15_8c.html#af1d4a751153857c173511e0c77ab4fa9">arm_cfft_radix4by2_q15()</a>.</p>
    345. 

  345. 

  346. </div>
    347. 

  347. </div>
    348. 

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  353.     <li class="navelem"><a class="el" href="dir_be2d3df67661aefe0e3f0071a1d6f8f1.html">DSP_Lib</a></li><li class="navelem"><a class="el" href="dir_7e8aa87db1ad6b3d9b1f25792e7c5208.html">Source</a></li><li class="navelem"><a class="el" href="dir_9c857f0e41082f634e50072d001e0d4f.html">TransformFunctions</a></li><li class="navelem"><a class="el" href="arm__cfft__q15_8c.html">arm_cfft_q15.c</a></li>
    354. 

  354.     <li class="footer">Generated on Tue Sep 23 2014 18:52:42 for CMSIS-DSP by ARM Ltd. All rights reserved.
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