Laxmi Kant Tiwari / mbed-dsp

CMSIS DSP Lib

Fork of mbed-dsp by mbed official

cmsis_dsp/ControllerFunctions/arm_sin_cos_q31.c@2:da51fb522205, 2013-05-30 (annotated)

Committer:
emilmont
Date:
Thu May 30 17:10:11 2013 +0100
Revision:
2:da51fb522205
Parent:
1:fdd22bb7aa52
Child:
3:7a284390b0ce
Keep "cmsis-dsp" module in synch with its source

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:fdd22bb7aa52 1 /* ----------------------------------------------------------------------
emilmont 1:fdd22bb7aa52 2 * Copyright (C) 2010 ARM Limited. All rights reserved.
emilmont 1:fdd22bb7aa52 3 *
emilmont 1:fdd22bb7aa52 4 * $Date: 15. February 2012
emilmont 2:da51fb522205 5 * $Revision: V1.1.0
emilmont 1:fdd22bb7aa52 6 *
emilmont 2:da51fb522205 7 * Project: CMSIS DSP Library
emilmont 2:da51fb522205 8 * Title: arm_sin_cos_q31.c
emilmont 1:fdd22bb7aa52 9 *
emilmont 2:da51fb522205 10 * Description: Cosine & Sine calculation for Q31 values.
emilmont 1:fdd22bb7aa52 11 *
emilmont 1:fdd22bb7aa52 12 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
emilmont 1:fdd22bb7aa52 13 *
emilmont 1:fdd22bb7aa52 14 * Version 1.1.0 2012/02/15
emilmont 1:fdd22bb7aa52 15 * Updated with more optimizations, bug fixes and minor API changes.
emilmont 1:fdd22bb7aa52 16 *
emilmont 1:fdd22bb7aa52 17 * Version 1.0.10 2011/7/15
emilmont 1:fdd22bb7aa52 18 * Big Endian support added and Merged M0 and M3/M4 Source code.
emilmont 1:fdd22bb7aa52 19 *
emilmont 1:fdd22bb7aa52 20 * Version 1.0.3 2010/11/29
emilmont 1:fdd22bb7aa52 21 * Re-organized the CMSIS folders and updated documentation.
emilmont 1:fdd22bb7aa52 22 *
emilmont 1:fdd22bb7aa52 23 * Version 1.0.2 2010/11/11
emilmont 1:fdd22bb7aa52 24 * Documentation updated.
emilmont 1:fdd22bb7aa52 25 *
emilmont 1:fdd22bb7aa52 26 * Version 1.0.1 2010/10/05
emilmont 1:fdd22bb7aa52 27 * Production release and review comments incorporated.
emilmont 1:fdd22bb7aa52 28 *
emilmont 1:fdd22bb7aa52 29 * Version 1.0.0 2010/09/20
emilmont 1:fdd22bb7aa52 30 * Production release and review comments incorporated.
emilmont 1:fdd22bb7aa52 31 * -------------------------------------------------------------------- */
emilmont 1:fdd22bb7aa52 32
emilmont 1:fdd22bb7aa52 33 #include "arm_math.h"
emilmont 1:fdd22bb7aa52 34
emilmont 1:fdd22bb7aa52 35 /**
emilmont 1:fdd22bb7aa52 36 * @ingroup groupController
emilmont 1:fdd22bb7aa52 37 */
emilmont 1:fdd22bb7aa52 38
emilmont 1:fdd22bb7aa52 39 /**
emilmont 1:fdd22bb7aa52 40 * @addtogroup SinCos
emilmont 1:fdd22bb7aa52 41 * @{
emilmont 1:fdd22bb7aa52 42 */
emilmont 1:fdd22bb7aa52 43
emilmont 1:fdd22bb7aa52 44 /**
emilmont 1:fdd22bb7aa52 45 * \par
emilmont 1:fdd22bb7aa52 46 * Sine Table is generated from following loop
emilmont 1:fdd22bb7aa52 47 * <pre>for(i = 0; i < 360; i++)
emilmont 1:fdd22bb7aa52 48 * {
emilmont 1:fdd22bb7aa52 49 * sinTable[i]= sin((i-180) * PI/180.0);
emilmont 1:fdd22bb7aa52 50 * } </pre>
emilmont 1:fdd22bb7aa52 51 * Convert above coefficients to fixed point 1.31 format.
emilmont 1:fdd22bb7aa52 52 */
emilmont 1:fdd22bb7aa52 53
emilmont 1:fdd22bb7aa52 54 static const int32_t sinTableQ31[360] = {
emilmont 1:fdd22bb7aa52 55
emilmont 1:fdd22bb7aa52 56 0x0, 0xfdc41e9b, 0xfb8869ce, 0xf94d0e2e, 0xf7123849, 0xf4d814a4, 0xf29ecfb2,
emilmont 1:fdd22bb7aa52 57 0xf06695da,
emilmont 1:fdd22bb7aa52 58 0xee2f9369, 0xebf9f498, 0xe9c5e582, 0xe7939223, 0xe5632654, 0xe334cdc9,
emilmont 1:fdd22bb7aa52 59 0xe108b40d, 0xdedf047d,
emilmont 1:fdd22bb7aa52 60 0xdcb7ea46, 0xda939061, 0xd8722192, 0xd653c860, 0xd438af17, 0xd220ffc0,
emilmont 1:fdd22bb7aa52 61 0xd00ce422, 0xcdfc85bb,
emilmont 1:fdd22bb7aa52 62 0xcbf00dbe, 0xc9e7a512, 0xc7e3744b, 0xc5e3a3a9, 0xc3e85b18, 0xc1f1c224,
emilmont 1:fdd22bb7aa52 63 0xc0000000, 0xbe133b7c,
emilmont 1:fdd22bb7aa52 64 0xbc2b9b05, 0xba4944a2, 0xb86c5df0, 0xb6950c1e, 0xb4c373ee, 0xb2f7b9af,
emilmont 1:fdd22bb7aa52 65 0xb1320139, 0xaf726def,
emilmont 1:fdd22bb7aa52 66 0xadb922b7, 0xac0641fb, 0xaa59eda4, 0xa8b4471a, 0xa7156f3c, 0xa57d8666,
emilmont 1:fdd22bb7aa52 67 0xa3ecac65, 0xa263007d,
emilmont 1:fdd22bb7aa52 68 0xa0e0a15f, 0x9f65ad2d, 0x9df24175, 0x9c867b2c, 0x9b2276b0, 0x99c64fc5,
emilmont 1:fdd22bb7aa52 69 0x98722192, 0x9726069c,
emilmont 1:fdd22bb7aa52 70 0x95e218c9, 0x94a6715d, 0x937328f5, 0x92485786, 0x9126145f, 0x900c7621,
emilmont 1:fdd22bb7aa52 71 0x8efb92c2, 0x8df37f8b,
emilmont 1:fdd22bb7aa52 72 0x8cf45113, 0x8bfe1b3f, 0x8b10f144, 0x8a2ce59f, 0x89520a1a, 0x88806fc4,
emilmont 1:fdd22bb7aa52 73 0x87b826f7, 0x86f93f50,
emilmont 1:fdd22bb7aa52 74 0x8643c7b3, 0x8597ce46, 0x84f56073, 0x845c8ae3, 0x83cd5982, 0x8347d77b,
emilmont 1:fdd22bb7aa52 75 0x82cc0f36, 0x825a0a5b,
emilmont 1:fdd22bb7aa52 76 0x81f1d1ce, 0x81936daf, 0x813ee55b, 0x80f43f69, 0x80b381ac, 0x807cb130,
emilmont 1:fdd22bb7aa52 77 0x804fd23a, 0x802ce84c,
emilmont 1:fdd22bb7aa52 78 0x8013f61d, 0x8004fda0, 0x80000000, 0x8004fda0, 0x8013f61d, 0x802ce84c,
emilmont 1:fdd22bb7aa52 79 0x804fd23a, 0x807cb130,
emilmont 1:fdd22bb7aa52 80 0x80b381ac, 0x80f43f69, 0x813ee55b, 0x81936daf, 0x81f1d1ce, 0x825a0a5b,
emilmont 1:fdd22bb7aa52 81 0x82cc0f36, 0x8347d77b,
emilmont 1:fdd22bb7aa52 82 0x83cd5982, 0x845c8ae3, 0x84f56073, 0x8597ce46, 0x8643c7b3, 0x86f93f50,
emilmont 1:fdd22bb7aa52 83 0x87b826f7, 0x88806fc4,
emilmont 1:fdd22bb7aa52 84 0x89520a1a, 0x8a2ce59f, 0x8b10f144, 0x8bfe1b3f, 0x8cf45113, 0x8df37f8b,
emilmont 1:fdd22bb7aa52 85 0x8efb92c2, 0x900c7621,
emilmont 1:fdd22bb7aa52 86 0x9126145f, 0x92485786, 0x937328f5, 0x94a6715d, 0x95e218c9, 0x9726069c,
emilmont 1:fdd22bb7aa52 87 0x98722192, 0x99c64fc5,
emilmont 1:fdd22bb7aa52 88 0x9b2276b0, 0x9c867b2c, 0x9df24175, 0x9f65ad2d, 0xa0e0a15f, 0xa263007d,
emilmont 1:fdd22bb7aa52 89 0xa3ecac65, 0xa57d8666,
emilmont 1:fdd22bb7aa52 90 0xa7156f3c, 0xa8b4471a, 0xaa59eda4, 0xac0641fb, 0xadb922b7, 0xaf726def,
emilmont 1:fdd22bb7aa52 91 0xb1320139, 0xb2f7b9af,
emilmont 1:fdd22bb7aa52 92 0xb4c373ee, 0xb6950c1e, 0xb86c5df0, 0xba4944a2, 0xbc2b9b05, 0xbe133b7c,
emilmont 1:fdd22bb7aa52 93 0xc0000000, 0xc1f1c224,
emilmont 1:fdd22bb7aa52 94 0xc3e85b18, 0xc5e3a3a9, 0xc7e3744b, 0xc9e7a512, 0xcbf00dbe, 0xcdfc85bb,
emilmont 1:fdd22bb7aa52 95 0xd00ce422, 0xd220ffc0,
emilmont 1:fdd22bb7aa52 96 0xd438af17, 0xd653c860, 0xd8722192, 0xda939061, 0xdcb7ea46, 0xdedf047d,
emilmont 1:fdd22bb7aa52 97 0xe108b40d, 0xe334cdc9,
emilmont 1:fdd22bb7aa52 98 0xe5632654, 0xe7939223, 0xe9c5e582, 0xebf9f498, 0xee2f9369, 0xf06695da,
emilmont 1:fdd22bb7aa52 99 0xf29ecfb2, 0xf4d814a4,
emilmont 1:fdd22bb7aa52 100 0xf7123849, 0xf94d0e2e, 0xfb8869ce, 0xfdc41e9b, 0x0, 0x23be165, 0x4779632,
emilmont 1:fdd22bb7aa52 101 0x6b2f1d2,
emilmont 1:fdd22bb7aa52 102 0x8edc7b7, 0xb27eb5c, 0xd61304e, 0xf996a26, 0x11d06c97, 0x14060b68,
emilmont 1:fdd22bb7aa52 103 0x163a1a7e, 0x186c6ddd,
emilmont 1:fdd22bb7aa52 104 0x1a9cd9ac, 0x1ccb3237, 0x1ef74bf3, 0x2120fb83, 0x234815ba, 0x256c6f9f,
emilmont 1:fdd22bb7aa52 105 0x278dde6e, 0x29ac37a0,
emilmont 1:fdd22bb7aa52 106 0x2bc750e9, 0x2ddf0040, 0x2ff31bde, 0x32037a45, 0x340ff242, 0x36185aee,
emilmont 1:fdd22bb7aa52 107 0x381c8bb5, 0x3a1c5c57,
emilmont 1:fdd22bb7aa52 108 0x3c17a4e8, 0x3e0e3ddc, 0x40000000, 0x41ecc484, 0x43d464fb, 0x45b6bb5e,
emilmont 1:fdd22bb7aa52 109 0x4793a210, 0x496af3e2,
emilmont 1:fdd22bb7aa52 110 0x4b3c8c12, 0x4d084651, 0x4ecdfec7, 0x508d9211, 0x5246dd49, 0x53f9be05,
emilmont 1:fdd22bb7aa52 111 0x55a6125c, 0x574bb8e6,
emilmont 1:fdd22bb7aa52 112 0x58ea90c4, 0x5a82799a, 0x5c13539b, 0x5d9cff83, 0x5f1f5ea1, 0x609a52d3,
emilmont 1:fdd22bb7aa52 113 0x620dbe8b, 0x637984d4,
emilmont 1:fdd22bb7aa52 114 0x64dd8950, 0x6639b03b, 0x678dde6e, 0x68d9f964, 0x6a1de737, 0x6b598ea3,
emilmont 1:fdd22bb7aa52 115 0x6c8cd70b, 0x6db7a87a,
emilmont 1:fdd22bb7aa52 116 0x6ed9eba1, 0x6ff389df, 0x71046d3e, 0x720c8075, 0x730baeed, 0x7401e4c1,
emilmont 1:fdd22bb7aa52 117 0x74ef0ebc, 0x75d31a61,
emilmont 1:fdd22bb7aa52 118 0x76adf5e6, 0x777f903c, 0x7847d909, 0x7906c0b0, 0x79bc384d, 0x7a6831ba,
emilmont 1:fdd22bb7aa52 119 0x7b0a9f8d, 0x7ba3751d,
emilmont 1:fdd22bb7aa52 120 0x7c32a67e, 0x7cb82885, 0x7d33f0ca, 0x7da5f5a5, 0x7e0e2e32, 0x7e6c9251,
emilmont 1:fdd22bb7aa52 121 0x7ec11aa5, 0x7f0bc097,
emilmont 1:fdd22bb7aa52 122 0x7f4c7e54, 0x7f834ed0, 0x7fb02dc6, 0x7fd317b4, 0x7fec09e3, 0x7ffb0260,
emilmont 1:fdd22bb7aa52 123 0x7fffffff, 0x7ffb0260,
emilmont 1:fdd22bb7aa52 124 0x7fec09e3, 0x7fd317b4, 0x7fb02dc6, 0x7f834ed0, 0x7f4c7e54, 0x7f0bc097,
emilmont 1:fdd22bb7aa52 125 0x7ec11aa5, 0x7e6c9251,
emilmont 1:fdd22bb7aa52 126 0x7e0e2e32, 0x7da5f5a5, 0x7d33f0ca, 0x7cb82885, 0x7c32a67e, 0x7ba3751d,
emilmont 1:fdd22bb7aa52 127 0x7b0a9f8d, 0x7a6831ba,
emilmont 1:fdd22bb7aa52 128 0x79bc384d, 0x7906c0b0, 0x7847d909, 0x777f903c, 0x76adf5e6, 0x75d31a61,
emilmont 1:fdd22bb7aa52 129 0x74ef0ebc, 0x7401e4c1,
emilmont 1:fdd22bb7aa52 130 0x730baeed, 0x720c8075, 0x71046d3e, 0x6ff389df, 0x6ed9eba1, 0x6db7a87a,
emilmont 1:fdd22bb7aa52 131 0x6c8cd70b, 0x6b598ea3,
emilmont 1:fdd22bb7aa52 132 0x6a1de737, 0x68d9f964, 0x678dde6e, 0x6639b03b, 0x64dd8950, 0x637984d4,
emilmont 1:fdd22bb7aa52 133 0x620dbe8b, 0x609a52d3,
emilmont 1:fdd22bb7aa52 134 0x5f1f5ea1, 0x5d9cff83, 0x5c13539b, 0x5a82799a, 0x58ea90c4, 0x574bb8e6,
emilmont 1:fdd22bb7aa52 135 0x55a6125c, 0x53f9be05,
emilmont 1:fdd22bb7aa52 136 0x5246dd49, 0x508d9211, 0x4ecdfec7, 0x4d084651, 0x4b3c8c12, 0x496af3e2,
emilmont 1:fdd22bb7aa52 137 0x4793a210, 0x45b6bb5e,
emilmont 1:fdd22bb7aa52 138 0x43d464fb, 0x41ecc484, 0x40000000, 0x3e0e3ddc, 0x3c17a4e8, 0x3a1c5c57,
emilmont 1:fdd22bb7aa52 139 0x381c8bb5, 0x36185aee,
emilmont 1:fdd22bb7aa52 140 0x340ff242, 0x32037a45, 0x2ff31bde, 0x2ddf0040, 0x2bc750e9, 0x29ac37a0,
emilmont 1:fdd22bb7aa52 141 0x278dde6e, 0x256c6f9f,
emilmont 1:fdd22bb7aa52 142 0x234815ba, 0x2120fb83, 0x1ef74bf3, 0x1ccb3237, 0x1a9cd9ac, 0x186c6ddd,
emilmont 1:fdd22bb7aa52 143 0x163a1a7e, 0x14060b68,
emilmont 1:fdd22bb7aa52 144 0x11d06c97, 0xf996a26, 0xd61304e, 0xb27eb5c, 0x8edc7b7, 0x6b2f1d2,
emilmont 1:fdd22bb7aa52 145 0x4779632, 0x23be165,
emilmont 1:fdd22bb7aa52 146
emilmont 1:fdd22bb7aa52 147
emilmont 1:fdd22bb7aa52 148 };
emilmont 1:fdd22bb7aa52 149
emilmont 1:fdd22bb7aa52 150 /**
emilmont 1:fdd22bb7aa52 151 * \par
emilmont 1:fdd22bb7aa52 152 * Cosine Table is generated from following loop
emilmont 1:fdd22bb7aa52 153 * <pre>for(i = 0; i < 360; i++)
emilmont 1:fdd22bb7aa52 154 * {
emilmont 1:fdd22bb7aa52 155 * cosTable[i]= cos((i-180) * PI/180.0);
emilmont 1:fdd22bb7aa52 156 * } </pre>
emilmont 1:fdd22bb7aa52 157 * \par
emilmont 1:fdd22bb7aa52 158 * Convert above coefficients to fixed point 1.31 format.
emilmont 1:fdd22bb7aa52 159 */
emilmont 1:fdd22bb7aa52 160 static const int32_t cosTableQ31[360] = {
emilmont 1:fdd22bb7aa52 161 0x80000000, 0x8004fda0, 0x8013f61d, 0x802ce84c, 0x804fd23a, 0x807cb130,
emilmont 1:fdd22bb7aa52 162 0x80b381ac, 0x80f43f69,
emilmont 1:fdd22bb7aa52 163 0x813ee55b, 0x81936daf, 0x81f1d1ce, 0x825a0a5b, 0x82cc0f36, 0x8347d77b,
emilmont 1:fdd22bb7aa52 164 0x83cd5982, 0x845c8ae3,
emilmont 1:fdd22bb7aa52 165 0x84f56073, 0x8597ce46, 0x8643c7b3, 0x86f93f50, 0x87b826f7, 0x88806fc4,
emilmont 1:fdd22bb7aa52 166 0x89520a1a, 0x8a2ce59f,
emilmont 1:fdd22bb7aa52 167 0x8b10f144, 0x8bfe1b3f, 0x8cf45113, 0x8df37f8b, 0x8efb92c2, 0x900c7621,
emilmont 1:fdd22bb7aa52 168 0x9126145f, 0x92485786,
emilmont 1:fdd22bb7aa52 169 0x937328f5, 0x94a6715d, 0x95e218c9, 0x9726069c, 0x98722192, 0x99c64fc5,
emilmont 1:fdd22bb7aa52 170 0x9b2276b0, 0x9c867b2c,
emilmont 1:fdd22bb7aa52 171 0x9df24175, 0x9f65ad2d, 0xa0e0a15f, 0xa263007d, 0xa3ecac65, 0xa57d8666,
emilmont 1:fdd22bb7aa52 172 0xa7156f3c, 0xa8b4471a,
emilmont 1:fdd22bb7aa52 173 0xaa59eda4, 0xac0641fb, 0xadb922b7, 0xaf726def, 0xb1320139, 0xb2f7b9af,
emilmont 1:fdd22bb7aa52 174 0xb4c373ee, 0xb6950c1e,
emilmont 1:fdd22bb7aa52 175 0xb86c5df0, 0xba4944a2, 0xbc2b9b05, 0xbe133b7c, 0xc0000000, 0xc1f1c224,
emilmont 1:fdd22bb7aa52 176 0xc3e85b18, 0xc5e3a3a9,
emilmont 1:fdd22bb7aa52 177 0xc7e3744b, 0xc9e7a512, 0xcbf00dbe, 0xcdfc85bb, 0xd00ce422, 0xd220ffc0,
emilmont 1:fdd22bb7aa52 178 0xd438af17, 0xd653c860,
emilmont 1:fdd22bb7aa52 179 0xd8722192, 0xda939061, 0xdcb7ea46, 0xdedf047d, 0xe108b40d, 0xe334cdc9,
emilmont 1:fdd22bb7aa52 180 0xe5632654, 0xe7939223,
emilmont 1:fdd22bb7aa52 181 0xe9c5e582, 0xebf9f498, 0xee2f9369, 0xf06695da, 0xf29ecfb2, 0xf4d814a4,
emilmont 1:fdd22bb7aa52 182 0xf7123849, 0xf94d0e2e,
emilmont 1:fdd22bb7aa52 183 0xfb8869ce, 0xfdc41e9b, 0x0, 0x23be165, 0x4779632, 0x6b2f1d2, 0x8edc7b7,
emilmont 1:fdd22bb7aa52 184 0xb27eb5c,
emilmont 1:fdd22bb7aa52 185 0xd61304e, 0xf996a26, 0x11d06c97, 0x14060b68, 0x163a1a7e, 0x186c6ddd,
emilmont 1:fdd22bb7aa52 186 0x1a9cd9ac, 0x1ccb3237,
emilmont 1:fdd22bb7aa52 187 0x1ef74bf3, 0x2120fb83, 0x234815ba, 0x256c6f9f, 0x278dde6e, 0x29ac37a0,
emilmont 1:fdd22bb7aa52 188 0x2bc750e9, 0x2ddf0040,
emilmont 1:fdd22bb7aa52 189 0x2ff31bde, 0x32037a45, 0x340ff242, 0x36185aee, 0x381c8bb5, 0x3a1c5c57,
emilmont 1:fdd22bb7aa52 190 0x3c17a4e8, 0x3e0e3ddc,
emilmont 1:fdd22bb7aa52 191 0x40000000, 0x41ecc484, 0x43d464fb, 0x45b6bb5e, 0x4793a210, 0x496af3e2,
emilmont 1:fdd22bb7aa52 192 0x4b3c8c12, 0x4d084651,
emilmont 1:fdd22bb7aa52 193 0x4ecdfec7, 0x508d9211, 0x5246dd49, 0x53f9be05, 0x55a6125c, 0x574bb8e6,
emilmont 1:fdd22bb7aa52 194 0x58ea90c4, 0x5a82799a,
emilmont 1:fdd22bb7aa52 195 0x5c13539b, 0x5d9cff83, 0x5f1f5ea1, 0x609a52d3, 0x620dbe8b, 0x637984d4,
emilmont 1:fdd22bb7aa52 196 0x64dd8950, 0x6639b03b,
emilmont 1:fdd22bb7aa52 197 0x678dde6e, 0x68d9f964, 0x6a1de737, 0x6b598ea3, 0x6c8cd70b, 0x6db7a87a,
emilmont 1:fdd22bb7aa52 198 0x6ed9eba1, 0x6ff389df,
emilmont 1:fdd22bb7aa52 199 0x71046d3e, 0x720c8075, 0x730baeed, 0x7401e4c1, 0x74ef0ebc, 0x75d31a61,
emilmont 1:fdd22bb7aa52 200 0x76adf5e6, 0x777f903c,
emilmont 1:fdd22bb7aa52 201 0x7847d909, 0x7906c0b0, 0x79bc384d, 0x7a6831ba, 0x7b0a9f8d, 0x7ba3751d,
emilmont 1:fdd22bb7aa52 202 0x7c32a67e, 0x7cb82885,
emilmont 1:fdd22bb7aa52 203 0x7d33f0ca, 0x7da5f5a5, 0x7e0e2e32, 0x7e6c9251, 0x7ec11aa5, 0x7f0bc097,
emilmont 1:fdd22bb7aa52 204 0x7f4c7e54, 0x7f834ed0,
emilmont 1:fdd22bb7aa52 205 0x7fb02dc6, 0x7fd317b4, 0x7fec09e3, 0x7ffb0260, 0x7fffffff, 0x7ffb0260,
emilmont 1:fdd22bb7aa52 206 0x7fec09e3, 0x7fd317b4,
emilmont 1:fdd22bb7aa52 207 0x7fb02dc6, 0x7f834ed0, 0x7f4c7e54, 0x7f0bc097, 0x7ec11aa5, 0x7e6c9251,
emilmont 1:fdd22bb7aa52 208 0x7e0e2e32, 0x7da5f5a5,
emilmont 1:fdd22bb7aa52 209 0x7d33f0ca, 0x7cb82885, 0x7c32a67e, 0x7ba3751d, 0x7b0a9f8d, 0x7a6831ba,
emilmont 1:fdd22bb7aa52 210 0x79bc384d, 0x7906c0b0,
emilmont 1:fdd22bb7aa52 211 0x7847d909, 0x777f903c, 0x76adf5e6, 0x75d31a61, 0x74ef0ebc, 0x7401e4c1,
emilmont 1:fdd22bb7aa52 212 0x730baeed, 0x720c8075,
emilmont 1:fdd22bb7aa52 213 0x71046d3e, 0x6ff389df, 0x6ed9eba1, 0x6db7a87a, 0x6c8cd70b, 0x6b598ea3,
emilmont 1:fdd22bb7aa52 214 0x6a1de737, 0x68d9f964,
emilmont 1:fdd22bb7aa52 215 0x678dde6e, 0x6639b03b, 0x64dd8950, 0x637984d4, 0x620dbe8b, 0x609a52d3,
emilmont 1:fdd22bb7aa52 216 0x5f1f5ea1, 0x5d9cff83,
emilmont 1:fdd22bb7aa52 217 0x5c13539b, 0x5a82799a, 0x58ea90c4, 0x574bb8e6, 0x55a6125c, 0x53f9be05,
emilmont 1:fdd22bb7aa52 218 0x5246dd49, 0x508d9211,
emilmont 1:fdd22bb7aa52 219 0x4ecdfec7, 0x4d084651, 0x4b3c8c12, 0x496af3e2, 0x4793a210, 0x45b6bb5e,
emilmont 1:fdd22bb7aa52 220 0x43d464fb, 0x41ecc484,
emilmont 1:fdd22bb7aa52 221 0x40000000, 0x3e0e3ddc, 0x3c17a4e8, 0x3a1c5c57, 0x381c8bb5, 0x36185aee,
emilmont 1:fdd22bb7aa52 222 0x340ff242, 0x32037a45,
emilmont 1:fdd22bb7aa52 223 0x2ff31bde, 0x2ddf0040, 0x2bc750e9, 0x29ac37a0, 0x278dde6e, 0x256c6f9f,
emilmont 1:fdd22bb7aa52 224 0x234815ba, 0x2120fb83,
emilmont 1:fdd22bb7aa52 225 0x1ef74bf3, 0x1ccb3237, 0x1a9cd9ac, 0x186c6ddd, 0x163a1a7e, 0x14060b68,
emilmont 1:fdd22bb7aa52 226 0x11d06c97, 0xf996a26,
emilmont 1:fdd22bb7aa52 227 0xd61304e, 0xb27eb5c, 0x8edc7b7, 0x6b2f1d2, 0x4779632, 0x23be165, 0x0,
emilmont 1:fdd22bb7aa52 228 0xfdc41e9b,
emilmont 1:fdd22bb7aa52 229 0xfb8869ce, 0xf94d0e2e, 0xf7123849, 0xf4d814a4, 0xf29ecfb2, 0xf06695da,
emilmont 1:fdd22bb7aa52 230 0xee2f9369, 0xebf9f498,
emilmont 1:fdd22bb7aa52 231 0xe9c5e582, 0xe7939223, 0xe5632654, 0xe334cdc9, 0xe108b40d, 0xdedf047d,
emilmont 1:fdd22bb7aa52 232 0xdcb7ea46, 0xda939061,
emilmont 1:fdd22bb7aa52 233 0xd8722192, 0xd653c860, 0xd438af17, 0xd220ffc0, 0xd00ce422, 0xcdfc85bb,
emilmont 1:fdd22bb7aa52 234 0xcbf00dbe, 0xc9e7a512,
emilmont 1:fdd22bb7aa52 235 0xc7e3744b, 0xc5e3a3a9, 0xc3e85b18, 0xc1f1c224, 0xc0000000, 0xbe133b7c,
emilmont 1:fdd22bb7aa52 236 0xbc2b9b05, 0xba4944a2,
emilmont 1:fdd22bb7aa52 237 0xb86c5df0, 0xb6950c1e, 0xb4c373ee, 0xb2f7b9af, 0xb1320139, 0xaf726def,
emilmont 1:fdd22bb7aa52 238 0xadb922b7, 0xac0641fb,
emilmont 1:fdd22bb7aa52 239 0xaa59eda4, 0xa8b4471a, 0xa7156f3c, 0xa57d8666, 0xa3ecac65, 0xa263007d,
emilmont 1:fdd22bb7aa52 240 0xa0e0a15f, 0x9f65ad2d,
emilmont 1:fdd22bb7aa52 241 0x9df24175, 0x9c867b2c, 0x9b2276b0, 0x99c64fc5, 0x98722192, 0x9726069c,
emilmont 1:fdd22bb7aa52 242 0x95e218c9, 0x94a6715d,
emilmont 1:fdd22bb7aa52 243 0x937328f5, 0x92485786, 0x9126145f, 0x900c7621, 0x8efb92c2, 0x8df37f8b,
emilmont 1:fdd22bb7aa52 244 0x8cf45113, 0x8bfe1b3f,
emilmont 1:fdd22bb7aa52 245 0x8b10f144, 0x8a2ce59f, 0x89520a1a, 0x88806fc4, 0x87b826f7, 0x86f93f50,
emilmont 1:fdd22bb7aa52 246 0x8643c7b3, 0x8597ce46,
emilmont 1:fdd22bb7aa52 247 0x84f56073, 0x845c8ae3, 0x83cd5982, 0x8347d77b, 0x82cc0f36, 0x825a0a5b,
emilmont 1:fdd22bb7aa52 248 0x81f1d1ce, 0x81936daf,
emilmont 1:fdd22bb7aa52 249 0x813ee55b, 0x80f43f69, 0x80b381ac, 0x807cb130, 0x804fd23a, 0x802ce84c,
emilmont 1:fdd22bb7aa52 250 0x8013f61d, 0x8004fda0,
emilmont 1:fdd22bb7aa52 251
emilmont 1:fdd22bb7aa52 252 };
emilmont 1:fdd22bb7aa52 253
emilmont 1:fdd22bb7aa52 254
emilmont 1:fdd22bb7aa52 255 /**
emilmont 1:fdd22bb7aa52 256 * @brief Q31 sin_cos function.
emilmont 1:fdd22bb7aa52 257 * @param[in] theta scaled input value in degrees
emilmont 1:fdd22bb7aa52 258 * @param[out] *pSinVal points to the processed sine output.
emilmont 1:fdd22bb7aa52 259 * @param[out] *pCosVal points to the processed cosine output.
emilmont 1:fdd22bb7aa52 260 * @return none.
emilmont 1:fdd22bb7aa52 261 *
emilmont 1:fdd22bb7aa52 262 * The Q31 input value is in the range [-1 0.999999] and is mapped to a degree value in the range [-180 179].
emilmont 1:fdd22bb7aa52 263 *
emilmont 1:fdd22bb7aa52 264 */
emilmont 1:fdd22bb7aa52 265
emilmont 1:fdd22bb7aa52 266
emilmont 1:fdd22bb7aa52 267 void arm_sin_cos_q31(
emilmont 1:fdd22bb7aa52 268 q31_t theta,
emilmont 1:fdd22bb7aa52 269 q31_t * pSinVal,
emilmont 1:fdd22bb7aa52 270 q31_t * pCosVal)
emilmont 1:fdd22bb7aa52 271 {
emilmont 1:fdd22bb7aa52 272 q31_t x0; /* Nearest input value */
emilmont 1:fdd22bb7aa52 273 q31_t y0, y1; /* Nearest output values */
emilmont 1:fdd22bb7aa52 274 q31_t xSpacing = INPUT_SPACING; /* Spaing between inputs */
emilmont 1:fdd22bb7aa52 275 int32_t i; /* Index */
emilmont 1:fdd22bb7aa52 276 q31_t oneByXSpacing; /* 1/ xSpacing value */
emilmont 1:fdd22bb7aa52 277 q31_t out; /* temporary variable */
emilmont 1:fdd22bb7aa52 278 uint32_t sign_bits; /* No.of sign bits */
emilmont 1:fdd22bb7aa52 279 uint32_t firstX = 0x80000000; /* First X value */
emilmont 1:fdd22bb7aa52 280
emilmont 1:fdd22bb7aa52 281 /* Calculation of index */
emilmont 1:fdd22bb7aa52 282 i = ((uint32_t) theta - firstX) / (uint32_t) xSpacing;
emilmont 1:fdd22bb7aa52 283
emilmont 1:fdd22bb7aa52 284 /* Checking min and max index of table */
emilmont 1:fdd22bb7aa52 285 if(i < 0)
emilmont 1:fdd22bb7aa52 286 {
emilmont 1:fdd22bb7aa52 287 i = 0;
emilmont 1:fdd22bb7aa52 288 }
emilmont 1:fdd22bb7aa52 289 else if(i >= 359)
emilmont 1:fdd22bb7aa52 290 {
emilmont 1:fdd22bb7aa52 291 i = 358;
emilmont 1:fdd22bb7aa52 292 }
emilmont 1:fdd22bb7aa52 293
emilmont 1:fdd22bb7aa52 294 /* Calculation of first nearest input value */
emilmont 1:fdd22bb7aa52 295 x0 = (q31_t) firstX + ((q31_t) i * xSpacing);
emilmont 1:fdd22bb7aa52 296
emilmont 1:fdd22bb7aa52 297 /* Reading nearest sine output values from table */
emilmont 1:fdd22bb7aa52 298 y0 = sinTableQ31[i];
emilmont 1:fdd22bb7aa52 299 y1 = sinTableQ31[i + 1u];
emilmont 1:fdd22bb7aa52 300
emilmont 1:fdd22bb7aa52 301 /* Calculation of 1/(x1-x0) */
emilmont 1:fdd22bb7aa52 302 /* (x1-x0) is xSpacing which is fixed value */
emilmont 1:fdd22bb7aa52 303 sign_bits = 8u;
emilmont 1:fdd22bb7aa52 304 oneByXSpacing = 0x5A000000;
emilmont 1:fdd22bb7aa52 305
emilmont 1:fdd22bb7aa52 306 /* Calculation of (theta - x0)/(x1-x0) */
emilmont 1:fdd22bb7aa52 307 out =
emilmont 1:fdd22bb7aa52 308 (((q31_t) (((q63_t) (theta - x0) * oneByXSpacing) >> 32)) << sign_bits);
emilmont 1:fdd22bb7aa52 309
emilmont 1:fdd22bb7aa52 310 /* Calculation of y0 + (y1 - y0) * ((theta - x0)/(x1-x0)) */
emilmont 1:fdd22bb7aa52 311 *pSinVal = __QADD(y0, ((q31_t) (((q63_t) (y1 - y0) * out) >> 30)));
emilmont 1:fdd22bb7aa52 312
emilmont 1:fdd22bb7aa52 313 /* Reading nearest cosine output values from table */
emilmont 1:fdd22bb7aa52 314 y0 = cosTableQ31[i];
emilmont 1:fdd22bb7aa52 315 y1 = cosTableQ31[i + 1u];
emilmont 1:fdd22bb7aa52 316
emilmont 1:fdd22bb7aa52 317 /* Calculation of y0 + (y1 - y0) * ((theta - x0)/(x1-x0)) */
emilmont 1:fdd22bb7aa52 318 *pCosVal = __QADD(y0, ((q31_t) (((q63_t) (y1 - y0) * out) >> 30)));
emilmont 1:fdd22bb7aa52 319
emilmont 1:fdd22bb7aa52 320 }
emilmont 1:fdd22bb7aa52 321
emilmont 1:fdd22bb7aa52 322 /**
emilmont 1:fdd22bb7aa52 323 * @} end of SinCos group
emilmont 1:fdd22bb7aa52 324 */