1 /* ----------------------------------------------------------------------
2 * Copyright (C) 2010 ARM Limited. All rights reserved.
7 * Project: CMSIS DSP Library
8 * Title: arm_cfft_radix4_init_q15.c
10 * Description: Radix-4 Decimation in Frequency Q15 FFT & IFFT initialization function
12 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
14 * Version 1.0.10 2011/7/15
15 * Big Endian support added and Merged M0 and M3/M4 Source code.
17 * Version 1.0.3 2010/11/29
18 * Re-organized the CMSIS folders and updated documentation.
20 * Version 1.0.2 2010/11/11
21 * Documentation updated.
23 * Version 1.0.1 2010/10/05
24 * Production release and review comments incorporated.
26 * Version 1.0.0 2010/09/20
27 * Production release and review comments incorporated.
29 * Version 0.0.5 2010/04/26
30 * incorporated review comments and updated with latest CMSIS layer
32 * Version 0.0.3 2010/03/10
34 * -------------------------------------------------------------------- */
37 #include "arm_common_tables.h"
40 * @ingroup groupTransforms
45 * @addtogroup CFFT_CIFFT
50 * @brief Twiddle factors Table
55 * Example code for Q15 Twiddle factors Generation::
57 * <pre>for(i = 0; i< N; i++)
59 * twiddleCoefQ15[2*i]= cos(i * 2*PI/(float)N);
60 * twiddleCoefQ15[2*i+1]= sin(i * 2*PI/(float)N);
63 * where N = 1024 and PI = 3.14159265358979
65 * Cos and Sin values are interleaved fashion
67 * Convert Floating point to Q15(Fixed point 1.15):
68 * round(twiddleCoefQ15(i) * pow(2, 15))
72 static const q15_t twiddleCoefQ15[2048] = {
73 0x7fff, 0x0, 0x7fff, 0xc9, 0x7ffe, 0x192, 0x7ffa, 0x25b,
74 0x7ff6, 0x324, 0x7ff1, 0x3ed, 0x7fea, 0x4b6, 0x7fe2, 0x57f,
75 0x7fd9, 0x648, 0x7fce, 0x711, 0x7fc2, 0x7d9, 0x7fb5, 0x8a2,
76 0x7fa7, 0x96b, 0x7f98, 0xa33, 0x7f87, 0xafb, 0x7f75, 0xbc4,
77 0x7f62, 0xc8c, 0x7f4e, 0xd54, 0x7f38, 0xe1c, 0x7f22, 0xee4,
78 0x7f0a, 0xfab, 0x7ef0, 0x1073, 0x7ed6, 0x113a, 0x7eba, 0x1201,
79 0x7e9d, 0x12c8, 0x7e7f, 0x138f, 0x7e60, 0x1455, 0x7e3f, 0x151c,
80 0x7e1e, 0x15e2, 0x7dfb, 0x16a8, 0x7dd6, 0x176e, 0x7db1, 0x1833,
81 0x7d8a, 0x18f9, 0x7d63, 0x19be, 0x7d3a, 0x1a83, 0x7d0f, 0x1b47,
82 0x7ce4, 0x1c0c, 0x7cb7, 0x1cd0, 0x7c89, 0x1d93, 0x7c5a, 0x1e57,
83 0x7c2a, 0x1f1a, 0x7bf9, 0x1fdd, 0x7bc6, 0x209f, 0x7b92, 0x2162,
84 0x7b5d, 0x2224, 0x7b27, 0x22e5, 0x7aef, 0x23a7, 0x7ab7, 0x2467,
85 0x7a7d, 0x2528, 0x7a42, 0x25e8, 0x7a06, 0x26a8, 0x79c9, 0x2768,
86 0x798a, 0x2827, 0x794a, 0x28e5, 0x790a, 0x29a4, 0x78c8, 0x2a62,
87 0x7885, 0x2b1f, 0x7840, 0x2bdc, 0x77fb, 0x2c99, 0x77b4, 0x2d55,
88 0x776c, 0x2e11, 0x7723, 0x2ecc, 0x76d9, 0x2f87, 0x768e, 0x3042,
89 0x7642, 0x30fc, 0x75f4, 0x31b5, 0x75a6, 0x326e, 0x7556, 0x3327,
90 0x7505, 0x33df, 0x74b3, 0x3497, 0x7460, 0x354e, 0x740b, 0x3604,
91 0x73b6, 0x36ba, 0x735f, 0x3770, 0x7308, 0x3825, 0x72af, 0x38d9,
92 0x7255, 0x398d, 0x71fa, 0x3a40, 0x719e, 0x3af3, 0x7141, 0x3ba5,
93 0x70e3, 0x3c57, 0x7083, 0x3d08, 0x7023, 0x3db8, 0x6fc2, 0x3e68,
94 0x6f5f, 0x3f17, 0x6efb, 0x3fc6, 0x6e97, 0x4074, 0x6e31, 0x4121,
95 0x6dca, 0x41ce, 0x6d62, 0x427a, 0x6cf9, 0x4326, 0x6c8f, 0x43d1,
96 0x6c24, 0x447b, 0x6bb8, 0x4524, 0x6b4b, 0x45cd, 0x6add, 0x4675,
97 0x6a6e, 0x471d, 0x69fd, 0x47c4, 0x698c, 0x486a, 0x691a, 0x490f,
98 0x68a7, 0x49b4, 0x6832, 0x4a58, 0x67bd, 0x4afb, 0x6747, 0x4b9e,
99 0x66d0, 0x4c40, 0x6657, 0x4ce1, 0x65de, 0x4d81, 0x6564, 0x4e21,
100 0x64e9, 0x4ec0, 0x646c, 0x4f5e, 0x63ef, 0x4ffb, 0x6371, 0x5098,
101 0x62f2, 0x5134, 0x6272, 0x51cf, 0x61f1, 0x5269, 0x616f, 0x5303,
102 0x60ec, 0x539b, 0x6068, 0x5433, 0x5fe4, 0x54ca, 0x5f5e, 0x5560,
103 0x5ed7, 0x55f6, 0x5e50, 0x568a, 0x5dc8, 0x571e, 0x5d3e, 0x57b1,
104 0x5cb4, 0x5843, 0x5c29, 0x58d4, 0x5b9d, 0x5964, 0x5b10, 0x59f4,
105 0x5a82, 0x5a82, 0x59f4, 0x5b10, 0x5964, 0x5b9d, 0x58d4, 0x5c29,
106 0x5843, 0x5cb4, 0x57b1, 0x5d3e, 0x571e, 0x5dc8, 0x568a, 0x5e50,
107 0x55f6, 0x5ed7, 0x5560, 0x5f5e, 0x54ca, 0x5fe4, 0x5433, 0x6068,
108 0x539b, 0x60ec, 0x5303, 0x616f, 0x5269, 0x61f1, 0x51cf, 0x6272,
109 0x5134, 0x62f2, 0x5098, 0x6371, 0x4ffb, 0x63ef, 0x4f5e, 0x646c,
110 0x4ec0, 0x64e9, 0x4e21, 0x6564, 0x4d81, 0x65de, 0x4ce1, 0x6657,
111 0x4c40, 0x66d0, 0x4b9e, 0x6747, 0x4afb, 0x67bd, 0x4a58, 0x6832,
112 0x49b4, 0x68a7, 0x490f, 0x691a, 0x486a, 0x698c, 0x47c4, 0x69fd,
113 0x471d, 0x6a6e, 0x4675, 0x6add, 0x45cd, 0x6b4b, 0x4524, 0x6bb8,
114 0x447b, 0x6c24, 0x43d1, 0x6c8f, 0x4326, 0x6cf9, 0x427a, 0x6d62,
115 0x41ce, 0x6dca, 0x4121, 0x6e31, 0x4074, 0x6e97, 0x3fc6, 0x6efb,
116 0x3f17, 0x6f5f, 0x3e68, 0x6fc2, 0x3db8, 0x7023, 0x3d08, 0x7083,
117 0x3c57, 0x70e3, 0x3ba5, 0x7141, 0x3af3, 0x719e, 0x3a40, 0x71fa,
118 0x398d, 0x7255, 0x38d9, 0x72af, 0x3825, 0x7308, 0x3770, 0x735f,
119 0x36ba, 0x73b6, 0x3604, 0x740b, 0x354e, 0x7460, 0x3497, 0x74b3,
120 0x33df, 0x7505, 0x3327, 0x7556, 0x326e, 0x75a6, 0x31b5, 0x75f4,
121 0x30fc, 0x7642, 0x3042, 0x768e, 0x2f87, 0x76d9, 0x2ecc, 0x7723,
122 0x2e11, 0x776c, 0x2d55, 0x77b4, 0x2c99, 0x77fb, 0x2bdc, 0x7840,
123 0x2b1f, 0x7885, 0x2a62, 0x78c8, 0x29a4, 0x790a, 0x28e5, 0x794a,
124 0x2827, 0x798a, 0x2768, 0x79c9, 0x26a8, 0x7a06, 0x25e8, 0x7a42,
125 0x2528, 0x7a7d, 0x2467, 0x7ab7, 0x23a7, 0x7aef, 0x22e5, 0x7b27,
126 0x2224, 0x7b5d, 0x2162, 0x7b92, 0x209f, 0x7bc6, 0x1fdd, 0x7bf9,
127 0x1f1a, 0x7c2a, 0x1e57, 0x7c5a, 0x1d93, 0x7c89, 0x1cd0, 0x7cb7,
128 0x1c0c, 0x7ce4, 0x1b47, 0x7d0f, 0x1a83, 0x7d3a, 0x19be, 0x7d63,
129 0x18f9, 0x7d8a, 0x1833, 0x7db1, 0x176e, 0x7dd6, 0x16a8, 0x7dfb,
130 0x15e2, 0x7e1e, 0x151c, 0x7e3f, 0x1455, 0x7e60, 0x138f, 0x7e7f,
131 0x12c8, 0x7e9d, 0x1201, 0x7eba, 0x113a, 0x7ed6, 0x1073, 0x7ef0,
132 0xfab, 0x7f0a, 0xee4, 0x7f22, 0xe1c, 0x7f38, 0xd54, 0x7f4e,
133 0xc8c, 0x7f62, 0xbc4, 0x7f75, 0xafb, 0x7f87, 0xa33, 0x7f98,
134 0x96b, 0x7fa7, 0x8a2, 0x7fb5, 0x7d9, 0x7fc2, 0x711, 0x7fce,
135 0x648, 0x7fd9, 0x57f, 0x7fe2, 0x4b6, 0x7fea, 0x3ed, 0x7ff1,
136 0x324, 0x7ff6, 0x25b, 0x7ffa, 0x192, 0x7ffe, 0xc9, 0x7fff,
137 0x0, 0x7fff, 0xff37, 0x7fff, 0xfe6e, 0x7ffe, 0xfda5, 0x7ffa,
138 0xfcdc, 0x7ff6, 0xfc13, 0x7ff1, 0xfb4a, 0x7fea, 0xfa81, 0x7fe2,
139 0xf9b8, 0x7fd9, 0xf8ef, 0x7fce, 0xf827, 0x7fc2, 0xf75e, 0x7fb5,
140 0xf695, 0x7fa7, 0xf5cd, 0x7f98, 0xf505, 0x7f87, 0xf43c, 0x7f75,
141 0xf374, 0x7f62, 0xf2ac, 0x7f4e, 0xf1e4, 0x7f38, 0xf11c, 0x7f22,
142 0xf055, 0x7f0a, 0xef8d, 0x7ef0, 0xeec6, 0x7ed6, 0xedff, 0x7eba,
143 0xed38, 0x7e9d, 0xec71, 0x7e7f, 0xebab, 0x7e60, 0xeae4, 0x7e3f,
144 0xea1e, 0x7e1e, 0xe958, 0x7dfb, 0xe892, 0x7dd6, 0xe7cd, 0x7db1,
145 0xe707, 0x7d8a, 0xe642, 0x7d63, 0xe57d, 0x7d3a, 0xe4b9, 0x7d0f,
146 0xe3f4, 0x7ce4, 0xe330, 0x7cb7, 0xe26d, 0x7c89, 0xe1a9, 0x7c5a,
147 0xe0e6, 0x7c2a, 0xe023, 0x7bf9, 0xdf61, 0x7bc6, 0xde9e, 0x7b92,
148 0xdddc, 0x7b5d, 0xdd1b, 0x7b27, 0xdc59, 0x7aef, 0xdb99, 0x7ab7,
149 0xdad8, 0x7a7d, 0xda18, 0x7a42, 0xd958, 0x7a06, 0xd898, 0x79c9,
150 0xd7d9, 0x798a, 0xd71b, 0x794a, 0xd65c, 0x790a, 0xd59e, 0x78c8,
151 0xd4e1, 0x7885, 0xd424, 0x7840, 0xd367, 0x77fb, 0xd2ab, 0x77b4,
152 0xd1ef, 0x776c, 0xd134, 0x7723, 0xd079, 0x76d9, 0xcfbe, 0x768e,
153 0xcf04, 0x7642, 0xce4b, 0x75f4, 0xcd92, 0x75a6, 0xccd9, 0x7556,
154 0xcc21, 0x7505, 0xcb69, 0x74b3, 0xcab2, 0x7460, 0xc9fc, 0x740b,
155 0xc946, 0x73b6, 0xc890, 0x735f, 0xc7db, 0x7308, 0xc727, 0x72af,
156 0xc673, 0x7255, 0xc5c0, 0x71fa, 0xc50d, 0x719e, 0xc45b, 0x7141,
157 0xc3a9, 0x70e3, 0xc2f8, 0x7083, 0xc248, 0x7023, 0xc198, 0x6fc2,
158 0xc0e9, 0x6f5f, 0xc03a, 0x6efb, 0xbf8c, 0x6e97, 0xbedf, 0x6e31,
159 0xbe32, 0x6dca, 0xbd86, 0x6d62, 0xbcda, 0x6cf9, 0xbc2f, 0x6c8f,
160 0xbb85, 0x6c24, 0xbadc, 0x6bb8, 0xba33, 0x6b4b, 0xb98b, 0x6add,
161 0xb8e3, 0x6a6e, 0xb83c, 0x69fd, 0xb796, 0x698c, 0xb6f1, 0x691a,
162 0xb64c, 0x68a7, 0xb5a8, 0x6832, 0xb505, 0x67bd, 0xb462, 0x6747,
163 0xb3c0, 0x66d0, 0xb31f, 0x6657, 0xb27f, 0x65de, 0xb1df, 0x6564,
164 0xb140, 0x64e9, 0xb0a2, 0x646c, 0xb005, 0x63ef, 0xaf68, 0x6371,
165 0xaecc, 0x62f2, 0xae31, 0x6272, 0xad97, 0x61f1, 0xacfd, 0x616f,
166 0xac65, 0x60ec, 0xabcd, 0x6068, 0xab36, 0x5fe4, 0xaaa0, 0x5f5e,
167 0xaa0a, 0x5ed7, 0xa976, 0x5e50, 0xa8e2, 0x5dc8, 0xa84f, 0x5d3e,
168 0xa7bd, 0x5cb4, 0xa72c, 0x5c29, 0xa69c, 0x5b9d, 0xa60c, 0x5b10,
169 0xa57e, 0x5a82, 0xa4f0, 0x59f4, 0xa463, 0x5964, 0xa3d7, 0x58d4,
170 0xa34c, 0x5843, 0xa2c2, 0x57b1, 0xa238, 0x571e, 0xa1b0, 0x568a,
171 0xa129, 0x55f6, 0xa0a2, 0x5560, 0xa01c, 0x54ca, 0x9f98, 0x5433,
172 0x9f14, 0x539b, 0x9e91, 0x5303, 0x9e0f, 0x5269, 0x9d8e, 0x51cf,
173 0x9d0e, 0x5134, 0x9c8f, 0x5098, 0x9c11, 0x4ffb, 0x9b94, 0x4f5e,
174 0x9b17, 0x4ec0, 0x9a9c, 0x4e21, 0x9a22, 0x4d81, 0x99a9, 0x4ce1,
175 0x9930, 0x4c40, 0x98b9, 0x4b9e, 0x9843, 0x4afb, 0x97ce, 0x4a58,
176 0x9759, 0x49b4, 0x96e6, 0x490f, 0x9674, 0x486a, 0x9603, 0x47c4,
177 0x9592, 0x471d, 0x9523, 0x4675, 0x94b5, 0x45cd, 0x9448, 0x4524,
178 0x93dc, 0x447b, 0x9371, 0x43d1, 0x9307, 0x4326, 0x929e, 0x427a,
179 0x9236, 0x41ce, 0x91cf, 0x4121, 0x9169, 0x4074, 0x9105, 0x3fc6,
180 0x90a1, 0x3f17, 0x903e, 0x3e68, 0x8fdd, 0x3db8, 0x8f7d, 0x3d08,
181 0x8f1d, 0x3c57, 0x8ebf, 0x3ba5, 0x8e62, 0x3af3, 0x8e06, 0x3a40,
182 0x8dab, 0x398d, 0x8d51, 0x38d9, 0x8cf8, 0x3825, 0x8ca1, 0x3770,
183 0x8c4a, 0x36ba, 0x8bf5, 0x3604, 0x8ba0, 0x354e, 0x8b4d, 0x3497,
184 0x8afb, 0x33df, 0x8aaa, 0x3327, 0x8a5a, 0x326e, 0x8a0c, 0x31b5,
185 0x89be, 0x30fc, 0x8972, 0x3042, 0x8927, 0x2f87, 0x88dd, 0x2ecc,
186 0x8894, 0x2e11, 0x884c, 0x2d55, 0x8805, 0x2c99, 0x87c0, 0x2bdc,
187 0x877b, 0x2b1f, 0x8738, 0x2a62, 0x86f6, 0x29a4, 0x86b6, 0x28e5,
188 0x8676, 0x2827, 0x8637, 0x2768, 0x85fa, 0x26a8, 0x85be, 0x25e8,
189 0x8583, 0x2528, 0x8549, 0x2467, 0x8511, 0x23a7, 0x84d9, 0x22e5,
190 0x84a3, 0x2224, 0x846e, 0x2162, 0x843a, 0x209f, 0x8407, 0x1fdd,
191 0x83d6, 0x1f1a, 0x83a6, 0x1e57, 0x8377, 0x1d93, 0x8349, 0x1cd0,
192 0x831c, 0x1c0c, 0x82f1, 0x1b47, 0x82c6, 0x1a83, 0x829d, 0x19be,
193 0x8276, 0x18f9, 0x824f, 0x1833, 0x822a, 0x176e, 0x8205, 0x16a8,
194 0x81e2, 0x15e2, 0x81c1, 0x151c, 0x81a0, 0x1455, 0x8181, 0x138f,
195 0x8163, 0x12c8, 0x8146, 0x1201, 0x812a, 0x113a, 0x8110, 0x1073,
196 0x80f6, 0xfab, 0x80de, 0xee4, 0x80c8, 0xe1c, 0x80b2, 0xd54,
197 0x809e, 0xc8c, 0x808b, 0xbc4, 0x8079, 0xafb, 0x8068, 0xa33,
198 0x8059, 0x96b, 0x804b, 0x8a2, 0x803e, 0x7d9, 0x8032, 0x711,
199 0x8027, 0x648, 0x801e, 0x57f, 0x8016, 0x4b6, 0x800f, 0x3ed,
200 0x800a, 0x324, 0x8006, 0x25b, 0x8002, 0x192, 0x8001, 0xc9,
201 0x8000, 0x0, 0x8001, 0xff37, 0x8002, 0xfe6e, 0x8006, 0xfda5,
202 0x800a, 0xfcdc, 0x800f, 0xfc13, 0x8016, 0xfb4a, 0x801e, 0xfa81,
203 0x8027, 0xf9b8, 0x8032, 0xf8ef, 0x803e, 0xf827, 0x804b, 0xf75e,
204 0x8059, 0xf695, 0x8068, 0xf5cd, 0x8079, 0xf505, 0x808b, 0xf43c,
205 0x809e, 0xf374, 0x80b2, 0xf2ac, 0x80c8, 0xf1e4, 0x80de, 0xf11c,
206 0x80f6, 0xf055, 0x8110, 0xef8d, 0x812a, 0xeec6, 0x8146, 0xedff,
207 0x8163, 0xed38, 0x8181, 0xec71, 0x81a0, 0xebab, 0x81c1, 0xeae4,
208 0x81e2, 0xea1e, 0x8205, 0xe958, 0x822a, 0xe892, 0x824f, 0xe7cd,
209 0x8276, 0xe707, 0x829d, 0xe642, 0x82c6, 0xe57d, 0x82f1, 0xe4b9,
210 0x831c, 0xe3f4, 0x8349, 0xe330, 0x8377, 0xe26d, 0x83a6, 0xe1a9,
211 0x83d6, 0xe0e6, 0x8407, 0xe023, 0x843a, 0xdf61, 0x846e, 0xde9e,
212 0x84a3, 0xdddc, 0x84d9, 0xdd1b, 0x8511, 0xdc59, 0x8549, 0xdb99,
213 0x8583, 0xdad8, 0x85be, 0xda18, 0x85fa, 0xd958, 0x8637, 0xd898,
214 0x8676, 0xd7d9, 0x86b6, 0xd71b, 0x86f6, 0xd65c, 0x8738, 0xd59e,
215 0x877b, 0xd4e1, 0x87c0, 0xd424, 0x8805, 0xd367, 0x884c, 0xd2ab,
216 0x8894, 0xd1ef, 0x88dd, 0xd134, 0x8927, 0xd079, 0x8972, 0xcfbe,
217 0x89be, 0xcf04, 0x8a0c, 0xce4b, 0x8a5a, 0xcd92, 0x8aaa, 0xccd9,
218 0x8afb, 0xcc21, 0x8b4d, 0xcb69, 0x8ba0, 0xcab2, 0x8bf5, 0xc9fc,
219 0x8c4a, 0xc946, 0x8ca1, 0xc890, 0x8cf8, 0xc7db, 0x8d51, 0xc727,
220 0x8dab, 0xc673, 0x8e06, 0xc5c0, 0x8e62, 0xc50d, 0x8ebf, 0xc45b,
221 0x8f1d, 0xc3a9, 0x8f7d, 0xc2f8, 0x8fdd, 0xc248, 0x903e, 0xc198,
222 0x90a1, 0xc0e9, 0x9105, 0xc03a, 0x9169, 0xbf8c, 0x91cf, 0xbedf,
223 0x9236, 0xbe32, 0x929e, 0xbd86, 0x9307, 0xbcda, 0x9371, 0xbc2f,
224 0x93dc, 0xbb85, 0x9448, 0xbadc, 0x94b5, 0xba33, 0x9523, 0xb98b,
225 0x9592, 0xb8e3, 0x9603, 0xb83c, 0x9674, 0xb796, 0x96e6, 0xb6f1,
226 0x9759, 0xb64c, 0x97ce, 0xb5a8, 0x9843, 0xb505, 0x98b9, 0xb462,
227 0x9930, 0xb3c0, 0x99a9, 0xb31f, 0x9a22, 0xb27f, 0x9a9c, 0xb1df,
228 0x9b17, 0xb140, 0x9b94, 0xb0a2, 0x9c11, 0xb005, 0x9c8f, 0xaf68,
229 0x9d0e, 0xaecc, 0x9d8e, 0xae31, 0x9e0f, 0xad97, 0x9e91, 0xacfd,
230 0x9f14, 0xac65, 0x9f98, 0xabcd, 0xa01c, 0xab36, 0xa0a2, 0xaaa0,
231 0xa129, 0xaa0a, 0xa1b0, 0xa976, 0xa238, 0xa8e2, 0xa2c2, 0xa84f,
232 0xa34c, 0xa7bd, 0xa3d7, 0xa72c, 0xa463, 0xa69c, 0xa4f0, 0xa60c,
233 0xa57e, 0xa57e, 0xa60c, 0xa4f0, 0xa69c, 0xa463, 0xa72c, 0xa3d7,
234 0xa7bd, 0xa34c, 0xa84f, 0xa2c2, 0xa8e2, 0xa238, 0xa976, 0xa1b0,
235 0xaa0a, 0xa129, 0xaaa0, 0xa0a2, 0xab36, 0xa01c, 0xabcd, 0x9f98,
236 0xac65, 0x9f14, 0xacfd, 0x9e91, 0xad97, 0x9e0f, 0xae31, 0x9d8e,
237 0xaecc, 0x9d0e, 0xaf68, 0x9c8f, 0xb005, 0x9c11, 0xb0a2, 0x9b94,
238 0xb140, 0x9b17, 0xb1df, 0x9a9c, 0xb27f, 0x9a22, 0xb31f, 0x99a9,
239 0xb3c0, 0x9930, 0xb462, 0x98b9, 0xb505, 0x9843, 0xb5a8, 0x97ce,
240 0xb64c, 0x9759, 0xb6f1, 0x96e6, 0xb796, 0x9674, 0xb83c, 0x9603,
241 0xb8e3, 0x9592, 0xb98b, 0x9523, 0xba33, 0x94b5, 0xbadc, 0x9448,
242 0xbb85, 0x93dc, 0xbc2f, 0x9371, 0xbcda, 0x9307, 0xbd86, 0x929e,
243 0xbe32, 0x9236, 0xbedf, 0x91cf, 0xbf8c, 0x9169, 0xc03a, 0x9105,
244 0xc0e9, 0x90a1, 0xc198, 0x903e, 0xc248, 0x8fdd, 0xc2f8, 0x8f7d,
245 0xc3a9, 0x8f1d, 0xc45b, 0x8ebf, 0xc50d, 0x8e62, 0xc5c0, 0x8e06,
246 0xc673, 0x8dab, 0xc727, 0x8d51, 0xc7db, 0x8cf8, 0xc890, 0x8ca1,
247 0xc946, 0x8c4a, 0xc9fc, 0x8bf5, 0xcab2, 0x8ba0, 0xcb69, 0x8b4d,
248 0xcc21, 0x8afb, 0xccd9, 0x8aaa, 0xcd92, 0x8a5a, 0xce4b, 0x8a0c,
249 0xcf04, 0x89be, 0xcfbe, 0x8972, 0xd079, 0x8927, 0xd134, 0x88dd,
250 0xd1ef, 0x8894, 0xd2ab, 0x884c, 0xd367, 0x8805, 0xd424, 0x87c0,
251 0xd4e1, 0x877b, 0xd59e, 0x8738, 0xd65c, 0x86f6, 0xd71b, 0x86b6,
252 0xd7d9, 0x8676, 0xd898, 0x8637, 0xd958, 0x85fa, 0xda18, 0x85be,
253 0xdad8, 0x8583, 0xdb99, 0x8549, 0xdc59, 0x8511, 0xdd1b, 0x84d9,
254 0xdddc, 0x84a3, 0xde9e, 0x846e, 0xdf61, 0x843a, 0xe023, 0x8407,
255 0xe0e6, 0x83d6, 0xe1a9, 0x83a6, 0xe26d, 0x8377, 0xe330, 0x8349,
256 0xe3f4, 0x831c, 0xe4b9, 0x82f1, 0xe57d, 0x82c6, 0xe642, 0x829d,
257 0xe707, 0x8276, 0xe7cd, 0x824f, 0xe892, 0x822a, 0xe958, 0x8205,
258 0xea1e, 0x81e2, 0xeae4, 0x81c1, 0xebab, 0x81a0, 0xec71, 0x8181,
259 0xed38, 0x8163, 0xedff, 0x8146, 0xeec6, 0x812a, 0xef8d, 0x8110,
260 0xf055, 0x80f6, 0xf11c, 0x80de, 0xf1e4, 0x80c8, 0xf2ac, 0x80b2,
261 0xf374, 0x809e, 0xf43c, 0x808b, 0xf505, 0x8079, 0xf5cd, 0x8068,
262 0xf695, 0x8059, 0xf75e, 0x804b, 0xf827, 0x803e, 0xf8ef, 0x8032,
263 0xf9b8, 0x8027, 0xfa81, 0x801e, 0xfb4a, 0x8016, 0xfc13, 0x800f,
264 0xfcdc, 0x800a, 0xfda5, 0x8006, 0xfe6e, 0x8002, 0xff37, 0x8001,
265 0x0, 0x8000, 0xc9, 0x8001, 0x192, 0x8002, 0x25b, 0x8006,
266 0x324, 0x800a, 0x3ed, 0x800f, 0x4b6, 0x8016, 0x57f, 0x801e,
267 0x648, 0x8027, 0x711, 0x8032, 0x7d9, 0x803e, 0x8a2, 0x804b,
268 0x96b, 0x8059, 0xa33, 0x8068, 0xafb, 0x8079, 0xbc4, 0x808b,
269 0xc8c, 0x809e, 0xd54, 0x80b2, 0xe1c, 0x80c8, 0xee4, 0x80de,
270 0xfab, 0x80f6, 0x1073, 0x8110, 0x113a, 0x812a, 0x1201, 0x8146,
271 0x12c8, 0x8163, 0x138f, 0x8181, 0x1455, 0x81a0, 0x151c, 0x81c1,
272 0x15e2, 0x81e2, 0x16a8, 0x8205, 0x176e, 0x822a, 0x1833, 0x824f,
273 0x18f9, 0x8276, 0x19be, 0x829d, 0x1a83, 0x82c6, 0x1b47, 0x82f1,
274 0x1c0c, 0x831c, 0x1cd0, 0x8349, 0x1d93, 0x8377, 0x1e57, 0x83a6,
275 0x1f1a, 0x83d6, 0x1fdd, 0x8407, 0x209f, 0x843a, 0x2162, 0x846e,
276 0x2224, 0x84a3, 0x22e5, 0x84d9, 0x23a7, 0x8511, 0x2467, 0x8549,
277 0x2528, 0x8583, 0x25e8, 0x85be, 0x26a8, 0x85fa, 0x2768, 0x8637,
278 0x2827, 0x8676, 0x28e5, 0x86b6, 0x29a4, 0x86f6, 0x2a62, 0x8738,
279 0x2b1f, 0x877b, 0x2bdc, 0x87c0, 0x2c99, 0x8805, 0x2d55, 0x884c,
280 0x2e11, 0x8894, 0x2ecc, 0x88dd, 0x2f87, 0x8927, 0x3042, 0x8972,
281 0x30fc, 0x89be, 0x31b5, 0x8a0c, 0x326e, 0x8a5a, 0x3327, 0x8aaa,
282 0x33df, 0x8afb, 0x3497, 0x8b4d, 0x354e, 0x8ba0, 0x3604, 0x8bf5,
283 0x36ba, 0x8c4a, 0x3770, 0x8ca1, 0x3825, 0x8cf8, 0x38d9, 0x8d51,
284 0x398d, 0x8dab, 0x3a40, 0x8e06, 0x3af3, 0x8e62, 0x3ba5, 0x8ebf,
285 0x3c57, 0x8f1d, 0x3d08, 0x8f7d, 0x3db8, 0x8fdd, 0x3e68, 0x903e,
286 0x3f17, 0x90a1, 0x3fc6, 0x9105, 0x4074, 0x9169, 0x4121, 0x91cf,
287 0x41ce, 0x9236, 0x427a, 0x929e, 0x4326, 0x9307, 0x43d1, 0x9371,
288 0x447b, 0x93dc, 0x4524, 0x9448, 0x45cd, 0x94b5, 0x4675, 0x9523,
289 0x471d, 0x9592, 0x47c4, 0x9603, 0x486a, 0x9674, 0x490f, 0x96e6,
290 0x49b4, 0x9759, 0x4a58, 0x97ce, 0x4afb, 0x9843, 0x4b9e, 0x98b9,
291 0x4c40, 0x9930, 0x4ce1, 0x99a9, 0x4d81, 0x9a22, 0x4e21, 0x9a9c,
292 0x4ec0, 0x9b17, 0x4f5e, 0x9b94, 0x4ffb, 0x9c11, 0x5098, 0x9c8f,
293 0x5134, 0x9d0e, 0x51cf, 0x9d8e, 0x5269, 0x9e0f, 0x5303, 0x9e91,
294 0x539b, 0x9f14, 0x5433, 0x9f98, 0x54ca, 0xa01c, 0x5560, 0xa0a2,
295 0x55f6, 0xa129, 0x568a, 0xa1b0, 0x571e, 0xa238, 0x57b1, 0xa2c2,
296 0x5843, 0xa34c, 0x58d4, 0xa3d7, 0x5964, 0xa463, 0x59f4, 0xa4f0,
297 0x5a82, 0xa57e, 0x5b10, 0xa60c, 0x5b9d, 0xa69c, 0x5c29, 0xa72c,
298 0x5cb4, 0xa7bd, 0x5d3e, 0xa84f, 0x5dc8, 0xa8e2, 0x5e50, 0xa976,
299 0x5ed7, 0xaa0a, 0x5f5e, 0xaaa0, 0x5fe4, 0xab36, 0x6068, 0xabcd,
300 0x60ec, 0xac65, 0x616f, 0xacfd, 0x61f1, 0xad97, 0x6272, 0xae31,
301 0x62f2, 0xaecc, 0x6371, 0xaf68, 0x63ef, 0xb005, 0x646c, 0xb0a2,
302 0x64e9, 0xb140, 0x6564, 0xb1df, 0x65de, 0xb27f, 0x6657, 0xb31f,
303 0x66d0, 0xb3c0, 0x6747, 0xb462, 0x67bd, 0xb505, 0x6832, 0xb5a8,
304 0x68a7, 0xb64c, 0x691a, 0xb6f1, 0x698c, 0xb796, 0x69fd, 0xb83c,
305 0x6a6e, 0xb8e3, 0x6add, 0xb98b, 0x6b4b, 0xba33, 0x6bb8, 0xbadc,
306 0x6c24, 0xbb85, 0x6c8f, 0xbc2f, 0x6cf9, 0xbcda, 0x6d62, 0xbd86,
307 0x6dca, 0xbe32, 0x6e31, 0xbedf, 0x6e97, 0xbf8c, 0x6efb, 0xc03a,
308 0x6f5f, 0xc0e9, 0x6fc2, 0xc198, 0x7023, 0xc248, 0x7083, 0xc2f8,
309 0x70e3, 0xc3a9, 0x7141, 0xc45b, 0x719e, 0xc50d, 0x71fa, 0xc5c0,
310 0x7255, 0xc673, 0x72af, 0xc727, 0x7308, 0xc7db, 0x735f, 0xc890,
311 0x73b6, 0xc946, 0x740b, 0xc9fc, 0x7460, 0xcab2, 0x74b3, 0xcb69,
312 0x7505, 0xcc21, 0x7556, 0xccd9, 0x75a6, 0xcd92, 0x75f4, 0xce4b,
313 0x7642, 0xcf04, 0x768e, 0xcfbe, 0x76d9, 0xd079, 0x7723, 0xd134,
314 0x776c, 0xd1ef, 0x77b4, 0xd2ab, 0x77fb, 0xd367, 0x7840, 0xd424,
315 0x7885, 0xd4e1, 0x78c8, 0xd59e, 0x790a, 0xd65c, 0x794a, 0xd71b,
316 0x798a, 0xd7d9, 0x79c9, 0xd898, 0x7a06, 0xd958, 0x7a42, 0xda18,
317 0x7a7d, 0xdad8, 0x7ab7, 0xdb99, 0x7aef, 0xdc59, 0x7b27, 0xdd1b,
318 0x7b5d, 0xdddc, 0x7b92, 0xde9e, 0x7bc6, 0xdf61, 0x7bf9, 0xe023,
319 0x7c2a, 0xe0e6, 0x7c5a, 0xe1a9, 0x7c89, 0xe26d, 0x7cb7, 0xe330,
320 0x7ce4, 0xe3f4, 0x7d0f, 0xe4b9, 0x7d3a, 0xe57d, 0x7d63, 0xe642,
321 0x7d8a, 0xe707, 0x7db1, 0xe7cd, 0x7dd6, 0xe892, 0x7dfb, 0xe958,
322 0x7e1e, 0xea1e, 0x7e3f, 0xeae4, 0x7e60, 0xebab, 0x7e7f, 0xec71,
323 0x7e9d, 0xed38, 0x7eba, 0xedff, 0x7ed6, 0xeec6, 0x7ef0, 0xef8d,
324 0x7f0a, 0xf055, 0x7f22, 0xf11c, 0x7f38, 0xf1e4, 0x7f4e, 0xf2ac,
325 0x7f62, 0xf374, 0x7f75, 0xf43c, 0x7f87, 0xf505, 0x7f98, 0xf5cd,
326 0x7fa7, 0xf695, 0x7fb5, 0xf75e, 0x7fc2, 0xf827, 0x7fce, 0xf8ef,
327 0x7fd9, 0xf9b8, 0x7fe2, 0xfa81, 0x7fea, 0xfb4a, 0x7ff1, 0xfc13,
328 0x7ff6, 0xfcdc, 0x7ffa, 0xfda5, 0x7ffe, 0xfe6e, 0x7fff, 0xff37
333 * @brief Initialization function for the Q15 CFFT/CIFFT.
334 * @param[in,out] *S points to an instance of the Q15 CFFT/CIFFT structure.
335 * @param[in] fftLen length of the FFT.
336 * @param[in] ifftFlag flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.
337 * @param[in] bitReverseFlag flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.
338 * @return The function returns ARM_MATH_SUCCESS if initialization is successful or ARM_MATH_ARGUMENT_ERROR if <code>fftLen</code> is not a supported value.
342 * The parameter <code>ifftFlag</code> controls whether a forward or inverse transform is computed.
343 * Set(=1) ifftFlag for calculation of CIFFT otherwise CFFT is calculated
345 * The parameter <code>bitReverseFlag</code> controls whether output is in normal order or bit reversed order.
346 * Set(=1) bitReverseFlag for output to be in normal order otherwise output is in bit reversed order.
348 * The parameter <code>fftLen</code> Specifies length of CFFT/CIFFT process. Supported FFT Lengths are 16, 64, 256, 1024.
350 * This Function also initializes Twiddle factor table pointer and Bit reversal table pointer.
353 arm_status arm_cfft_radix4_init_q15(
354 arm_cfft_radix4_instance_q15 * S,
357 uint8_t bitReverseFlag)
359 /* Initialise the default arm status */
360 arm_status status = ARM_MATH_SUCCESS;
361 /* Initialise the FFT length */
363 /* Initialise the Twiddle coefficient pointer */
364 S->pTwiddle = (q15_t *) twiddleCoefQ15;
365 /* Initialise the Flag for selection of CFFT or CIFFT */
366 S->ifftFlag = ifftFlag;
367 /* Initialise the Flag for calculation Bit reversal or not */
368 S->bitReverseFlag = bitReverseFlag;
370 /* Initializations of structure parameters depending on the FFT length */
373 /* Initializations of structure parameters for 1024 point FFT */
375 /* Initialise the twiddle coef modifier value */
376 S->twidCoefModifier = 1u;
377 /* Initialise the bit reversal table modifier */
378 S->bitRevFactor = 1u;
379 /* Initialise the bit reversal table pointer */
380 S->pBitRevTable = armBitRevTable;
384 /* Initializations of structure parameters for 2566 point FFT */
385 S->twidCoefModifier = 4u;
386 S->bitRevFactor = 4u;
387 S->pBitRevTable = &armBitRevTable[3];
391 /* Initializations of structure parameters for 64 point FFT */
392 S->twidCoefModifier = 16u;
393 S->bitRevFactor = 16u;
394 S->pBitRevTable = &armBitRevTable[15];
398 /* Initializations of structure parameters for 16 point FFT */
399 S->twidCoefModifier = 64u;
400 S->bitRevFactor = 64u;
401 S->pBitRevTable = &armBitRevTable[63];
405 /* Reporting argument error if fftSize is not valid value */
406 status = ARM_MATH_ARGUMENT_ERROR;
414 * @} end of CFFT_CIFFT group
projects / fw / stlink / blob