CMSIS DSP Software Library: arm_sin_cos_q31.c Source File Main Page Modules Data Structures Files Examples File List Globals arm_sin_cos_q31.c Go to the documentation of this file.00001 /* ---------------------------------------------------------------------- 00002 * Copyright (C) 2010 ARM Limited. All rights reserved. 00003 * 00004 * $Date: 29. November 2010 00005 * $Revision: V1.0.3 00006 * 00007 * Project: CMSIS DSP Library 00008 * Title: arm_sin_cos_q31.c 00009 * 00010 * Description: Cosine & Sine calculation for Q31 values. 00011 * 00012 * Target Processor: Cortex-M4/Cortex-M3 00013 * 00014 * Version 1.0.3 2010/11/29 00015 * Re-organized the CMSIS folders and updated documentation. 00016 * 00017 * Version 1.0.2 2010/11/11 00018 * Documentation updated. 00019 * 00020 * Version 1.0.1 2010/10/05 00021 * Production release and review comments incorporated. 00022 * 00023 * Version 1.0.0 2010/09/20 00024 * Production release and review comments incorporated. 00025 * -------------------------------------------------------------------- */ 00026 00027 #include "arm_math.h" 00028 00048 static const int32_t sinTableQ31[360] = { 00049 00050 0x0, 0xfdc41e9b, 0xfb8869ce, 0xf94d0e2e, 0xf7123849, 0xf4d814a4, 0xf29ecfb2, 00051 0xf06695da, 00052 0xee2f9369, 0xebf9f498, 0xe9c5e582, 0xe7939223, 0xe5632654, 0xe334cdc9, 00053 0xe108b40d, 0xdedf047d, 00054 0xdcb7ea46, 0xda939061, 0xd8722192, 0xd653c860, 0xd438af17, 0xd220ffc0, 00055 0xd00ce422, 0xcdfc85bb, 00056 0xcbf00dbe, 0xc9e7a512, 0xc7e3744b, 0xc5e3a3a9, 0xc3e85b18, 0xc1f1c224, 00057 0xc0000000, 0xbe133b7c, 00058 0xbc2b9b05, 0xba4944a2, 0xb86c5df0, 0xb6950c1e, 0xb4c373ee, 0xb2f7b9af, 00059 0xb1320139, 0xaf726def, 00060 0xadb922b7, 0xac0641fb, 0xaa59eda4, 0xa8b4471a, 0xa7156f3c, 0xa57d8666, 00061 0xa3ecac65, 0xa263007d, 00062 0xa0e0a15f, 0x9f65ad2d, 0x9df24175, 0x9c867b2c, 0x9b2276b0, 0x99c64fc5, 00063 0x98722192, 0x9726069c, 00064 0x95e218c9, 0x94a6715d, 0x937328f5, 0x92485786, 0x9126145f, 0x900c7621, 00065 0x8efb92c2, 0x8df37f8b, 00066 0x8cf45113, 0x8bfe1b3f, 0x8b10f144, 0x8a2ce59f, 0x89520a1a, 0x88806fc4, 00067 0x87b826f7, 0x86f93f50, 00068 0x8643c7b3, 0x8597ce46, 0x84f56073, 0x845c8ae3, 0x83cd5982, 0x8347d77b, 00069 0x82cc0f36, 0x825a0a5b, 00070 0x81f1d1ce, 0x81936daf, 0x813ee55b, 0x80f43f69, 0x80b381ac, 0x807cb130, 00071 0x804fd23a, 0x802ce84c, 00072 0x8013f61d, 0x8004fda0, 0x80000000, 0x8004fda0, 0x8013f61d, 0x802ce84c, 00073 0x804fd23a, 0x807cb130, 00074 0x80b381ac, 0x80f43f69, 0x813ee55b, 0x81936daf, 0x81f1d1ce, 0x825a0a5b, 00075 0x82cc0f36, 0x8347d77b, 00076 0x83cd5982, 0x845c8ae3, 0x84f56073, 0x8597ce46, 0x8643c7b3, 0x86f93f50, 00077 0x87b826f7, 0x88806fc4, 00078 0x89520a1a, 0x8a2ce59f, 0x8b10f144, 0x8bfe1b3f, 0x8cf45113, 0x8df37f8b, 00079 0x8efb92c2, 0x900c7621, 00080 0x9126145f, 0x92485786, 0x937328f5, 0x94a6715d, 0x95e218c9, 0x9726069c, 00081 0x98722192, 0x99c64fc5, 00082 0x9b2276b0, 0x9c867b2c, 0x9df24175, 0x9f65ad2d, 0xa0e0a15f, 0xa263007d, 00083 0xa3ecac65, 0xa57d8666, 00084 0xa7156f3c, 0xa8b4471a, 0xaa59eda4, 0xac0641fb, 0xadb922b7, 0xaf726def, 00085 0xb1320139, 0xb2f7b9af, 00086 0xb4c373ee, 0xb6950c1e, 0xb86c5df0, 0xba4944a2, 0xbc2b9b05, 0xbe133b7c, 00087 0xc0000000, 0xc1f1c224, 00088 0xc3e85b18, 0xc5e3a3a9, 0xc7e3744b, 0xc9e7a512, 0xcbf00dbe, 0xcdfc85bb, 00089 0xd00ce422, 0xd220ffc0, 00090 0xd438af17, 0xd653c860, 0xd8722192, 0xda939061, 0xdcb7ea46, 0xdedf047d, 00091 0xe108b40d, 0xe334cdc9, 00092 0xe5632654, 0xe7939223, 0xe9c5e582, 0xebf9f498, 0xee2f9369, 0xf06695da, 00093 0xf29ecfb2, 0xf4d814a4, 00094 0xf7123849, 0xf94d0e2e, 0xfb8869ce, 0xfdc41e9b, 0x0, 0x23be165, 0x4779632, 00095 0x6b2f1d2, 00096 0x8edc7b7, 0xb27eb5c, 0xd61304e, 0xf996a26, 0x11d06c97, 0x14060b68, 00097 0x163a1a7e, 0x186c6ddd, 00098 0x1a9cd9ac, 0x1ccb3237, 0x1ef74bf3, 0x2120fb83, 0x234815ba, 0x256c6f9f, 00099 0x278dde6e, 0x29ac37a0, 00100 0x2bc750e9, 0x2ddf0040, 0x2ff31bde, 0x32037a45, 0x340ff242, 0x36185aee, 00101 0x381c8bb5, 0x3a1c5c57, 00102 0x3c17a4e8, 0x3e0e3ddc, 0x40000000, 0x41ecc484, 0x43d464fb, 0x45b6bb5e, 00103 0x4793a210, 0x496af3e2, 00104 0x4b3c8c12, 0x4d084651, 0x4ecdfec7, 0x508d9211, 0x5246dd49, 0x53f9be05, 00105 0x55a6125c, 0x574bb8e6, 00106 0x58ea90c4, 0x5a82799a, 0x5c13539b, 0x5d9cff83, 0x5f1f5ea1, 0x609a52d3, 00107 0x620dbe8b, 0x637984d4, 00108 0x64dd8950, 0x6639b03b, 0x678dde6e, 0x68d9f964, 0x6a1de737, 0x6b598ea3, 00109 0x6c8cd70b, 0x6db7a87a, 00110 0x6ed9eba1, 0x6ff389df, 0x71046d3e, 0x720c8075, 0x730baeed, 0x7401e4c1, 00111 0x74ef0ebc, 0x75d31a61, 00112 0x76adf5e6, 0x777f903c, 0x7847d909, 0x7906c0b0, 0x79bc384d, 0x7a6831ba, 00113 0x7b0a9f8d, 0x7ba3751d, 00114 0x7c32a67e, 0x7cb82885, 0x7d33f0ca, 0x7da5f5a5, 0x7e0e2e32, 0x7e6c9251, 00115 0x7ec11aa5, 0x7f0bc097, 00116 0x7f4c7e54, 0x7f834ed0, 0x7fb02dc6, 0x7fd317b4, 0x7fec09e3, 0x7ffb0260, 00117 0x7fffffff, 0x7ffb0260, 00118 0x7fec09e3, 0x7fd317b4, 0x7fb02dc6, 0x7f834ed0, 0x7f4c7e54, 0x7f0bc097, 00119 0x7ec11aa5, 0x7e6c9251, 00120 0x7e0e2e32, 0x7da5f5a5, 0x7d33f0ca, 0x7cb82885, 0x7c32a67e, 0x7ba3751d, 00121 0x7b0a9f8d, 0x7a6831ba, 00122 0x79bc384d, 0x7906c0b0, 0x7847d909, 0x777f903c, 0x76adf5e6, 0x75d31a61, 00123 0x74ef0ebc, 0x7401e4c1, 00124 0x730baeed, 0x720c8075, 0x71046d3e, 0x6ff389df, 0x6ed9eba1, 0x6db7a87a, 00125 0x6c8cd70b, 0x6b598ea3, 00126 0x6a1de737, 0x68d9f964, 0x678dde6e, 0x6639b03b, 0x64dd8950, 0x637984d4, 00127 0x620dbe8b, 0x609a52d3, 00128 0x5f1f5ea1, 0x5d9cff83, 0x5c13539b, 0x5a82799a, 0x58ea90c4, 0x574bb8e6, 00129 0x55a6125c, 0x53f9be05, 00130 0x5246dd49, 0x508d9211, 0x4ecdfec7, 0x4d084651, 0x4b3c8c12, 0x496af3e2, 00131 0x4793a210, 0x45b6bb5e, 00132 0x43d464fb, 0x41ecc484, 0x40000000, 0x3e0e3ddc, 0x3c17a4e8, 0x3a1c5c57, 00133 0x381c8bb5, 0x36185aee, 00134 0x340ff242, 0x32037a45, 0x2ff31bde, 0x2ddf0040, 0x2bc750e9, 0x29ac37a0, 00135 0x278dde6e, 0x256c6f9f, 00136 0x234815ba, 0x2120fb83, 0x1ef74bf3, 0x1ccb3237, 0x1a9cd9ac, 0x186c6ddd, 00137 0x163a1a7e, 0x14060b68, 00138 0x11d06c97, 0xf996a26, 0xd61304e, 0xb27eb5c, 0x8edc7b7, 0x6b2f1d2, 00139 0x4779632, 0x23be165, 00140 00141 00142 }; 00143 00154 static const int32_t cosTableQ31[360] = { 00155 0x80000000, 0x8004fda0, 0x8013f61d, 0x802ce84c, 0x804fd23a, 0x807cb130, 00156 0x80b381ac, 0x80f43f69, 00157 0x813ee55b, 0x81936daf, 0x81f1d1ce, 0x825a0a5b, 0x82cc0f36, 0x8347d77b, 00158 0x83cd5982, 0x845c8ae3, 00159 0x84f56073, 0x8597ce46, 0x8643c7b3, 0x86f93f50, 0x87b826f7, 0x88806fc4, 00160 0x89520a1a, 0x8a2ce59f, 00161 0x8b10f144, 0x8bfe1b3f, 0x8cf45113, 0x8df37f8b, 0x8efb92c2, 0x900c7621, 00162 0x9126145f, 0x92485786, 00163 0x937328f5, 0x94a6715d, 0x95e218c9, 0x9726069c, 0x98722192, 0x99c64fc5, 00164 0x9b2276b0, 0x9c867b2c, 00165 0x9df24175, 0x9f65ad2d, 0xa0e0a15f, 0xa263007d, 0xa3ecac65, 0xa57d8666, 00166 0xa7156f3c, 0xa8b4471a, 00167 0xaa59eda4, 0xac0641fb, 0xadb922b7, 0xaf726def, 0xb1320139, 0xb2f7b9af, 00168 0xb4c373ee, 0xb6950c1e, 00169 0xb86c5df0, 0xba4944a2, 0xbc2b9b05, 0xbe133b7c, 0xc0000000, 0xc1f1c224, 00170 0xc3e85b18, 0xc5e3a3a9, 00171 0xc7e3744b, 0xc9e7a512, 0xcbf00dbe, 0xcdfc85bb, 0xd00ce422, 0xd220ffc0, 00172 0xd438af17, 0xd653c860, 00173 0xd8722192, 0xda939061, 0xdcb7ea46, 0xdedf047d, 0xe108b40d, 0xe334cdc9, 00174 0xe5632654, 0xe7939223, 00175 0xe9c5e582, 0xebf9f498, 0xee2f9369, 0xf06695da, 0xf29ecfb2, 0xf4d814a4, 00176 0xf7123849, 0xf94d0e2e, 00177 0xfb8869ce, 0xfdc41e9b, 0x0, 0x23be165, 0x4779632, 0x6b2f1d2, 0x8edc7b7, 00178 0xb27eb5c, 00179 0xd61304e, 0xf996a26, 0x11d06c97, 0x14060b68, 0x163a1a7e, 0x186c6ddd, 00180 0x1a9cd9ac, 0x1ccb3237, 00181 0x1ef74bf3, 0x2120fb83, 0x234815ba, 0x256c6f9f, 0x278dde6e, 0x29ac37a0, 00182 0x2bc750e9, 0x2ddf0040, 00183 0x2ff31bde, 0x32037a45, 0x340ff242, 0x36185aee, 0x381c8bb5, 0x3a1c5c57, 00184 0x3c17a4e8, 0x3e0e3ddc, 00185 0x40000000, 0x41ecc484, 0x43d464fb, 0x45b6bb5e, 0x4793a210, 0x496af3e2, 00186 0x4b3c8c12, 0x4d084651, 00187 0x4ecdfec7, 0x508d9211, 0x5246dd49, 0x53f9be05, 0x55a6125c, 0x574bb8e6, 00188 0x58ea90c4, 0x5a82799a, 00189 0x5c13539b, 0x5d9cff83, 0x5f1f5ea1, 0x609a52d3, 0x620dbe8b, 0x637984d4, 00190 0x64dd8950, 0x6639b03b, 00191 0x678dde6e, 0x68d9f964, 0x6a1de737, 0x6b598ea3, 0x6c8cd70b, 0x6db7a87a, 00192 0x6ed9eba1, 0x6ff389df, 00193 0x71046d3e, 0x720c8075, 0x730baeed, 0x7401e4c1, 0x74ef0ebc, 0x75d31a61, 00194 0x76adf5e6, 0x777f903c, 00195 0x7847d909, 0x7906c0b0, 0x79bc384d, 0x7a6831ba, 0x7b0a9f8d, 0x7ba3751d, 00196 0x7c32a67e, 0x7cb82885, 00197 0x7d33f0ca, 0x7da5f5a5, 0x7e0e2e32, 0x7e6c9251, 0x7ec11aa5, 0x7f0bc097, 00198 0x7f4c7e54, 0x7f834ed0, 00199 0x7fb02dc6, 0x7fd317b4, 0x7fec09e3, 0x7ffb0260, 0x7fffffff, 0x7ffb0260, 00200 0x7fec09e3, 0x7fd317b4, 00201 0x7fb02dc6, 0x7f834ed0, 0x7f4c7e54, 0x7f0bc097, 0x7ec11aa5, 0x7e6c9251, 00202 0x7e0e2e32, 0x7da5f5a5, 00203 0x7d33f0ca, 0x7cb82885, 0x7c32a67e, 0x7ba3751d, 0x7b0a9f8d, 0x7a6831ba, 00204 0x79bc384d, 0x7906c0b0, 00205 0x7847d909, 0x777f903c, 0x76adf5e6, 0x75d31a61, 0x74ef0ebc, 0x7401e4c1, 00206 0x730baeed, 0x720c8075, 00207 0x71046d3e, 0x6ff389df, 0x6ed9eba1, 0x6db7a87a, 0x6c8cd70b, 0x6b598ea3, 00208 0x6a1de737, 0x68d9f964, 00209 0x678dde6e, 0x6639b03b, 0x64dd8950, 0x637984d4, 0x620dbe8b, 0x609a52d3, 00210 0x5f1f5ea1, 0x5d9cff83, 00211 0x5c13539b, 0x5a82799a, 0x58ea90c4, 0x574bb8e6, 0x55a6125c, 0x53f9be05, 00212 0x5246dd49, 0x508d9211, 00213 0x4ecdfec7, 0x4d084651, 0x4b3c8c12, 0x496af3e2, 0x4793a210, 0x45b6bb5e, 00214 0x43d464fb, 0x41ecc484, 00215 0x40000000, 0x3e0e3ddc, 0x3c17a4e8, 0x3a1c5c57, 0x381c8bb5, 0x36185aee, 00216 0x340ff242, 0x32037a45, 00217 0x2ff31bde, 0x2ddf0040, 0x2bc750e9, 0x29ac37a0, 0x278dde6e, 0x256c6f9f, 00218 0x234815ba, 0x2120fb83, 00219 0x1ef74bf3, 0x1ccb3237, 0x1a9cd9ac, 0x186c6ddd, 0x163a1a7e, 0x14060b68, 00220 0x11d06c97, 0xf996a26, 00221 0xd61304e, 0xb27eb5c, 0x8edc7b7, 0x6b2f1d2, 0x4779632, 0x23be165, 0x0, 00222 0xfdc41e9b, 00223 0xfb8869ce, 0xf94d0e2e, 0xf7123849, 0xf4d814a4, 0xf29ecfb2, 0xf06695da, 00224 0xee2f9369, 0xebf9f498, 00225 0xe9c5e582, 0xe7939223, 0xe5632654, 0xe334cdc9, 0xe108b40d, 0xdedf047d, 00226 0xdcb7ea46, 0xda939061, 00227 0xd8722192, 0xd653c860, 0xd438af17, 0xd220ffc0, 0xd00ce422, 0xcdfc85bb, 00228 0xcbf00dbe, 0xc9e7a512, 00229 0xc7e3744b, 0xc5e3a3a9, 0xc3e85b18, 0xc1f1c224, 0xc0000000, 0xbe133b7c, 00230 0xbc2b9b05, 0xba4944a2, 00231 0xb86c5df0, 0xb6950c1e, 0xb4c373ee, 0xb2f7b9af, 0xb1320139, 0xaf726def, 00232 0xadb922b7, 0xac0641fb, 00233 0xaa59eda4, 0xa8b4471a, 0xa7156f3c, 0xa57d8666, 0xa3ecac65, 0xa263007d, 00234 0xa0e0a15f, 0x9f65ad2d, 00235 0x9df24175, 0x9c867b2c, 0x9b2276b0, 0x99c64fc5, 0x98722192, 0x9726069c, 00236 0x95e218c9, 0x94a6715d, 00237 0x937328f5, 0x92485786, 0x9126145f, 0x900c7621, 0x8efb92c2, 0x8df37f8b, 00238 0x8cf45113, 0x8bfe1b3f, 00239 0x8b10f144, 0x8a2ce59f, 0x89520a1a, 0x88806fc4, 0x87b826f7, 0x86f93f50, 00240 0x8643c7b3, 0x8597ce46, 00241 0x84f56073, 0x845c8ae3, 0x83cd5982, 0x8347d77b, 0x82cc0f36, 0x825a0a5b, 00242 0x81f1d1ce, 0x81936daf, 00243 0x813ee55b, 0x80f43f69, 0x80b381ac, 0x807cb130, 0x804fd23a, 0x802ce84c, 00244 0x8013f61d, 0x8004fda0, 00245 00246 }; 00247 00248 00261 void arm_sin_cos_q31( 00262 q31_t theta, 00263 q31_t * pSinVal, 00264 q31_t * pCosVal) 00265 { 00266 q31_t x0; /* Nearest input value */ 00267 q31_t y0, y1; /* Nearest output values */ 00268 q31_t xSpacing = INPUT_SPACING; /* Spaing between inputs */ 00269 uint32_t i; /* Index */ 00270 q31_t oneByXSpacing; /* 1/ xSpacing value */ 00271 q31_t out; /* temporary variable */ 00272 uint32_t sign_bits; /* No.of sign bits */ 00273 uint32_t firstX = 0x80000000; /* First X value */ 00274 00275 /* Calculation of index */ 00276 i = ((uint32_t) theta - firstX) / (uint32_t) xSpacing; 00277 00278 /* Calculation of first nearest input value */ 00279 x0 = (q31_t) firstX + ((q31_t) i * xSpacing); 00280 00281 /* Reading nearest sine output values from table */ 00282 y0 = sinTableQ31[i]; 00283 y1 = sinTableQ31[i + 1u]; 00284 00285 /* Calculation of 1/(x1-x0) */ 00286 /* (x1-x0) is xSpacing which is fixed value */ 00287 sign_bits = 8u; 00288 oneByXSpacing = 0x5A000000; 00289 00290 /* Calculation of (theta - x0)/(x1-x0) */ 00291 out = (((q31_t) (((q63_t) (theta - x0) * oneByXSpacing) >> 32)) << sign_bits); 00292 00293 /* Calculation of y0 + (y1 - y0) * ((theta - x0)/(x1-x0)) */ 00294 *pSinVal = y0 + ((q31_t) (((q63_t) (y1 - y0) * out) >> 30)); 00295 00296 /* Reading nearest cosine output values from table */ 00297 y0 = cosTableQ31[i]; 00298 y1 = cosTableQ31[i + 1u]; 00299 00300 /* Calculation of y0 + (y1 - y0) * ((theta - x0)/(x1-x0)) */ 00301 *pCosVal = y0 + ((q31_t) (((q63_t) (y1 - y0) * out) >> 30)); 00302 00303 } 00304  All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Defines Generated on Mon Nov 29 2010 17:19:57 for CMSIS DSP Software Library by  1.7.2

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