AD9857 IQ DDS Digital Up Converter Experiment using Nucleo F401
Digital Signal Processing for IQ Quadradure Modulation DDS AD9857 using Nucleo F401.
see http://ttrftech.tumblr.com/post/114310226891/
dsp.cpp@3:e6897d74d6bf, 2015-03-23 (annotated)
- Committer:
- edy555
- Date:
- Mon Mar 23 15:00:50 2015 +0000
- Revision:
- 3:e6897d74d6bf
- Parent:
- 0:55201637d936
- Child:
- 4:dfd05c26edbe
fix saturate condition and carrier leakage
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
edy555 | 0:55201637d936 | 1 | #include "mbed.h" |
edy555 | 0:55201637d936 | 2 | #include "dsp.h" |
edy555 | 0:55201637d936 | 3 | |
edy555 | 0:55201637d936 | 4 | extern Serial pc; |
edy555 | 0:55201637d936 | 5 | |
edy555 | 0:55201637d936 | 6 | |
edy555 | 0:55201637d936 | 7 | int16_t htstat_buf[HILBERT_TRANSFORM_FIRSTATE_LENGTH]; |
edy555 | 0:55201637d936 | 8 | int16_t cap_buf[2][CAPTURE_LEN]; |
edy555 | 0:55201637d936 | 9 | |
edy555 | 0:55201637d936 | 10 | int16_t fir_state[FIRSTATE_LENGTH]; |
edy555 | 0:55201637d936 | 11 | int16_t fir_buf[CAPTURE_LEN]; |
edy555 | 0:55201637d936 | 12 | |
edy555 | 0:55201637d936 | 13 | int16_t cic_buf[CICBUF_LEN]; |
edy555 | 0:55201637d936 | 14 | int16_t dma_buf[2][DMA_DATALEN]; |
edy555 | 0:55201637d936 | 15 | |
edy555 | 0:55201637d936 | 16 | CICState cic; |
edy555 | 0:55201637d936 | 17 | |
edy555 | 0:55201637d936 | 18 | void cic_interpolate_x10(CICState *cic, uint32_t *src, int src_len, uint32_t *dst) |
edy555 | 0:55201637d936 | 19 | { |
edy555 | 0:55201637d936 | 20 | uint32_t p0 = cic->p0; |
edy555 | 0:55201637d936 | 21 | uint32_t s0 = cic->s0; |
edy555 | 0:55201637d936 | 22 | int i; |
edy555 | 0:55201637d936 | 23 | int j = 0; |
edy555 | 0:55201637d936 | 24 | for (i = 0; i < src_len; i++) { |
edy555 | 0:55201637d936 | 25 | uint32_t s = src[i]; |
edy555 | 3:e6897d74d6bf | 26 | uint32_t d0 = __QSUB16(s, p0); |
edy555 | 3:e6897d74d6bf | 27 | s0 = __QADD16(s0, d0); |
edy555 | 3:e6897d74d6bf | 28 | uint32_t s1 = __QADD16(s0, d0); |
edy555 | 3:e6897d74d6bf | 29 | uint32_t s2 = __QADD16(s1, d0); |
edy555 | 3:e6897d74d6bf | 30 | uint32_t s3 = __QADD16(s2, d0); |
edy555 | 3:e6897d74d6bf | 31 | uint32_t s4 = __QADD16(s3, d0); |
edy555 | 3:e6897d74d6bf | 32 | dst[j ] = s0 >> 2; |
edy555 | 3:e6897d74d6bf | 33 | dst[j+1] = s1 >> 2; |
edy555 | 3:e6897d74d6bf | 34 | dst[j+2] = s2 >> 2; |
edy555 | 3:e6897d74d6bf | 35 | dst[j+3] = s3 >> 2; |
edy555 | 3:e6897d74d6bf | 36 | dst[j+4] = s4 >> 2; |
edy555 | 0:55201637d936 | 37 | j += 5; |
edy555 | 0:55201637d936 | 38 | s0 = s4; |
edy555 | 3:e6897d74d6bf | 39 | s0 = __QADD16(s0, d0); |
edy555 | 3:e6897d74d6bf | 40 | s1 = __QADD16(s0, d0); |
edy555 | 3:e6897d74d6bf | 41 | s2 = __QADD16(s1, d0); |
edy555 | 3:e6897d74d6bf | 42 | s3 = __QADD16(s2, d0); |
edy555 | 3:e6897d74d6bf | 43 | s4 = __QADD16(s3, d0); |
edy555 | 3:e6897d74d6bf | 44 | dst[j ] = s0 >> 2; |
edy555 | 3:e6897d74d6bf | 45 | dst[j+1] = s1 >> 2; |
edy555 | 3:e6897d74d6bf | 46 | dst[j+2] = s2 >> 2; |
edy555 | 3:e6897d74d6bf | 47 | dst[j+3] = s3 >> 2; |
edy555 | 3:e6897d74d6bf | 48 | dst[j+4] = s4 >> 2; |
edy555 | 0:55201637d936 | 49 | j += 5; |
edy555 | 0:55201637d936 | 50 | s0 = s4; |
edy555 | 0:55201637d936 | 51 | p0 = s; |
edy555 | 0:55201637d936 | 52 | } |
edy555 | 0:55201637d936 | 53 | cic->s0 = s0; |
edy555 | 0:55201637d936 | 54 | cic->p0 = p0; |
edy555 | 0:55201637d936 | 55 | } |
edy555 | 0:55201637d936 | 56 | |
edy555 | 0:55201637d936 | 57 | const int16_t fir_coeff[8][16] = { |
edy555 | 0:55201637d936 | 58 | { -19, -6, 102, -22, -357, 264, 1798, 2064, 630, -337, -119, 111, 15, -24, 0, 0}, |
edy555 | 0:55201637d936 | 59 | { -13, -20, 76, 51, -311, -29, 1441, 2206, 1037, -231, -223, 96, 45, -25, -6, 0}, |
edy555 | 0:55201637d936 | 60 | { -6, -25, 45, 96, -223, -231, 1037, 2206, 1441, -29, -311, 51, 76, -20, -13, 0}, |
edy555 | 0:55201637d936 | 61 | { 0, -24, 15, 111, -119, -337, 630, 2064, 1798, 264, -357, -22, 102, -6, -19, 0}, |
edy555 | 0:55201637d936 | 62 | { 0, -19, -6, 102, -22, -357, 264, 1798, 2064, 630, -337, -119, 111, 15, -24, 0}, |
edy555 | 0:55201637d936 | 63 | { 0, -13, -20, 76, 51, -311, -29, 1441, 2206, 1037, -231, -223, 96, 45, -25, -6}, |
edy555 | 0:55201637d936 | 64 | { 0, -6, -25, 45, 96, -223, -231, 1037, 2206, 1441, -29, -311, 51, 76, -20, -13}, |
edy555 | 0:55201637d936 | 65 | { 0, 0, -24, 15, 111, -119, -337, 630, 2064, 1798, 264, -357, -22, 102, -6, -19} |
edy555 | 0:55201637d936 | 66 | }; |
edy555 | 0:55201637d936 | 67 | |
edy555 | 0:55201637d936 | 68 | void fir_resample_x4(uint32_t *src_state, uint32_t *dst, int dst_len) |
edy555 | 0:55201637d936 | 69 | { |
edy555 | 0:55201637d936 | 70 | uint32_t *src = src_state; |
edy555 | 0:55201637d936 | 71 | int index = 0; |
edy555 | 0:55201637d936 | 72 | int i; |
edy555 | 0:55201637d936 | 73 | for (i = 0; i < dst_len; i++) { |
edy555 | 0:55201637d936 | 74 | uint32_t *kp = (uint32_t*)fir_coeff[index]; |
edy555 | 0:55201637d936 | 75 | uint32_t acc_i = 0; |
edy555 | 0:55201637d936 | 76 | uint32_t acc_q = 0; |
edy555 | 0:55201637d936 | 77 | |
edy555 | 0:55201637d936 | 78 | // 8cycle x 8 |
edy555 | 0:55201637d936 | 79 | #define CELL(n) do { \ |
edy555 | 0:55201637d936 | 80 | uint32_t k = kp[n]; \ |
edy555 | 0:55201637d936 | 81 | uint32_t p0 = src[n*2]; \ |
edy555 | 0:55201637d936 | 82 | uint32_t p1 = src[n*2+1]; \ |
edy555 | 0:55201637d936 | 83 | uint32_t i01 = __PKHTB(p1, p0, 16); \ |
edy555 | 0:55201637d936 | 84 | uint32_t q01 = __PKHBT(p0, p1, 16); \ |
edy555 | 0:55201637d936 | 85 | acc_i = __SMLAD(k, i01, acc_i); \ |
edy555 | 0:55201637d936 | 86 | acc_q = __SMLAD(k, q01, acc_q); \ |
edy555 | 0:55201637d936 | 87 | } while(0) |
edy555 | 0:55201637d936 | 88 | |
edy555 | 0:55201637d936 | 89 | CELL(0); CELL(1); CELL(2); CELL(3); |
edy555 | 0:55201637d936 | 90 | CELL(4); CELL(5); CELL(6); CELL(7); |
edy555 | 3:e6897d74d6bf | 91 | *dst++ = __PKHTB(__SSAT16(acc_i, 16), __SSAT16(acc_q, 16), 16); |
edy555 | 0:55201637d936 | 92 | |
edy555 | 0:55201637d936 | 93 | index++; |
edy555 | 0:55201637d936 | 94 | if (index >= 8) { |
edy555 | 0:55201637d936 | 95 | index = 0; |
edy555 | 0:55201637d936 | 96 | src += 2; |
edy555 | 0:55201637d936 | 97 | } |
edy555 | 0:55201637d936 | 98 | } |
edy555 | 0:55201637d936 | 99 | |
edy555 | 0:55201637d936 | 100 | for (i = 0; i < FIRSTATE_LENGTH/2; i++) |
edy555 | 0:55201637d936 | 101 | *src_state++ = *src++; |
edy555 | 0:55201637d936 | 102 | } |
edy555 | 0:55201637d936 | 103 | |
edy555 | 0:55201637d936 | 104 | void |
edy555 | 0:55201637d936 | 105 | interpolate_test() |
edy555 | 0:55201637d936 | 106 | { |
edy555 | 0:55201637d936 | 107 | int freq = 1000; |
edy555 | 0:55201637d936 | 108 | int ampl = 3000; |
edy555 | 0:55201637d936 | 109 | int rate = 48000; |
edy555 | 0:55201637d936 | 110 | for (int i = 0; i < CAPTURE_LEN; i++){ |
edy555 | 0:55201637d936 | 111 | cap_buf[0][i*2] = sin(2*3.141592 * i * freq / rate) * ampl; // Lch |
edy555 | 0:55201637d936 | 112 | cap_buf[0][i*2+1] = cos(2*3.141592 * i * freq / rate) * ampl; // Rch |
edy555 | 0:55201637d936 | 113 | } |
edy555 | 0:55201637d936 | 114 | #if 0 |
edy555 | 0:55201637d936 | 115 | for (int i = 0; i < 48; i++){ |
edy555 | 0:55201637d936 | 116 | pc.printf("%d, ", cap_buf[i*2]); |
edy555 | 0:55201637d936 | 117 | } |
edy555 | 0:55201637d936 | 118 | pc.printf("\n\r"); |
edy555 | 0:55201637d936 | 119 | #endif |
edy555 | 0:55201637d936 | 120 | fir_resample_x4((uint32_t *)&cap_buf[0], (uint32_t*)&cic_buf, CICBUF_LEN); |
edy555 | 0:55201637d936 | 121 | cic_interpolate_x10(&cic, (uint32_t*)&cic_buf, CICBUF_LEN, (uint32_t*)dma_buf[0]); |
edy555 | 0:55201637d936 | 122 | fir_resample_x4((uint32_t *)&cap_buf[0], (uint32_t*)&cic_buf, CICBUF_LEN); |
edy555 | 0:55201637d936 | 123 | cic_interpolate_x10(&cic, (uint32_t*)&cic_buf, CICBUF_LEN, (uint32_t*)dma_buf[0]); |
edy555 | 0:55201637d936 | 124 | #if 0 |
edy555 | 0:55201637d936 | 125 | for (int i = 0; i < 48*25/4; i++){ |
edy555 | 0:55201637d936 | 126 | pc.printf("%d, ", cic_buf[i*2]); |
edy555 | 0:55201637d936 | 127 | } |
edy555 | 0:55201637d936 | 128 | pc.printf("\n\r"); |
edy555 | 0:55201637d936 | 129 | #endif |
edy555 | 0:55201637d936 | 130 | #if 0 |
edy555 | 0:55201637d936 | 131 | for (int i = DMA_DATALEN/2-400; i < DMA_DATALEN/2; i++){ |
edy555 | 0:55201637d936 | 132 | pc.printf("%d, ", dma_buf[i*2]); |
edy555 | 0:55201637d936 | 133 | } |
edy555 | 0:55201637d936 | 134 | pc.printf("\n\r"); |
edy555 | 0:55201637d936 | 135 | for (int i = 0; i < 400; i++){ |
edy555 | 0:55201637d936 | 136 | pc.printf("%d, ", dma_buf[i*2]); |
edy555 | 0:55201637d936 | 137 | } |
edy555 | 0:55201637d936 | 138 | pc.printf("\n\r"); |
edy555 | 0:55201637d936 | 139 | #endif |
edy555 | 0:55201637d936 | 140 | } |
edy555 | 0:55201637d936 | 141 | |
edy555 | 0:55201637d936 | 142 | // hilbert transform by 127 taps fir |
edy555 | 0:55201637d936 | 143 | int16_t hilbert127_fir_coeff[32] = { |
edy555 | 0:55201637d936 | 144 | 20848, 6917, 4112, 2897, 2212, 1768, 1454, 1219, 1036, |
edy555 | 0:55201637d936 | 145 | 887, 764, 661, 572, 496, 429, 371, 319, 274, |
edy555 | 0:55201637d936 | 146 | 234, 198, 167, 140, 117, 97, 79, 65, 53, |
edy555 | 0:55201637d936 | 147 | 44, 36, 31, 28, 26 |
edy555 | 0:55201637d936 | 148 | }; |
edy555 | 0:55201637d936 | 149 | |
edy555 | 0:55201637d936 | 150 | void |
edy555 | 0:55201637d936 | 151 | hilbert_transform(uint32_t *src, uint32_t *dst, int dst_len, int sign) |
edy555 | 0:55201637d936 | 152 | { |
edy555 | 0:55201637d936 | 153 | int j; |
edy555 | 0:55201637d936 | 154 | int len = sizeof htstat_buf / sizeof(uint32_t); |
edy555 | 0:55201637d936 | 155 | src -= len; |
edy555 | 0:55201637d936 | 156 | // 240 * (208 + 12) = 52800cycle = 0.62ms@84MHz |
edy555 | 0:55201637d936 | 157 | for (j = 0; j < dst_len; j++) { |
edy555 | 0:55201637d936 | 158 | int i; |
edy555 | 0:55201637d936 | 159 | int32_t acc = 0; |
edy555 | 0:55201637d936 | 160 | #define OFFSET 64 |
edy555 | 0:55201637d936 | 161 | // 16 * (10 + 3) = 208 cycle |
edy555 | 0:55201637d936 | 162 | for (i = 0; i < 32; i += 2) { |
edy555 | 0:55201637d936 | 163 | // 10 cycle |
edy555 | 0:55201637d936 | 164 | uint32_t c = *(uint32_t*)&hilbert127_fir_coeff[i]; |
edy555 | 0:55201637d936 | 165 | uint32_t a0 = src[OFFSET - i*2 - 1]; |
edy555 | 0:55201637d936 | 166 | uint32_t a1 = src[OFFSET - i*2 - 3]; |
edy555 | 0:55201637d936 | 167 | uint32_t b0 = src[OFFSET + i*2 + 1]; |
edy555 | 0:55201637d936 | 168 | uint32_t b1 = src[OFFSET + i*2 + 3]; |
edy555 | 0:55201637d936 | 169 | // fetch only R-ch (top half of word) from 2 successive samples |
edy555 | 0:55201637d936 | 170 | uint32_t a = __PKHTB(a1, a0, 16); |
edy555 | 0:55201637d936 | 171 | // and also do at symmetry samples |
edy555 | 0:55201637d936 | 172 | uint32_t b = __PKHTB(b1, b0, 16); |
edy555 | 0:55201637d936 | 173 | uint32_t d = __QSUB16(b, a); |
edy555 | 0:55201637d936 | 174 | acc = __SMLAD(c, d, acc); |
edy555 | 0:55201637d936 | 175 | } |
edy555 | 0:55201637d936 | 176 | acc *= sign; |
edy555 | 3:e6897d74d6bf | 177 | int32_t real = src[OFFSET]; |
edy555 | 3:e6897d74d6bf | 178 | real /= 2; |
edy555 | 3:e6897d74d6bf | 179 | *dst++ = __PKHTB(real, acc, 16); |
edy555 | 0:55201637d936 | 180 | src++; |
edy555 | 0:55201637d936 | 181 | } |
edy555 | 0:55201637d936 | 182 | } |
edy555 | 0:55201637d936 | 183 | |
edy555 | 0:55201637d936 | 184 | void |
edy555 | 0:55201637d936 | 185 | hilbert_transform_save_fir_state(uint32_t *src_tail) |
edy555 | 0:55201637d936 | 186 | { |
edy555 | 0:55201637d936 | 187 | int len = sizeof htstat_buf / sizeof(uint32_t); |
edy555 | 0:55201637d936 | 188 | uint32_t *dst = (uint32_t*)&htstat_buf[0]; |
edy555 | 0:55201637d936 | 189 | uint32_t *src = src_tail - len; |
edy555 | 0:55201637d936 | 190 | int i; |
edy555 | 0:55201637d936 | 191 | for (i = 0; i < len; i++) { |
edy555 | 0:55201637d936 | 192 | *dst++ = *src++; |
edy555 | 0:55201637d936 | 193 | } |
edy555 | 0:55201637d936 | 194 | } |
edy555 | 0:55201637d936 | 195 | |
edy555 | 0:55201637d936 | 196 | const int16_t cos_sin_table[257][4] = { |
edy555 | 0:55201637d936 | 197 | { 0, 402, -32767, 2 }, |
edy555 | 0:55201637d936 | 198 | { 402, 402, -32765, 8 }, |
edy555 | 0:55201637d936 | 199 | { 804, 402, -32757, 12 }, |
edy555 | 0:55201637d936 | 200 | { 1206, 402, -32745, 17 }, |
edy555 | 0:55201637d936 | 201 | { 1608, 401, -32728, 23 }, |
edy555 | 0:55201637d936 | 202 | { 2009, 401, -32705, 27 }, |
edy555 | 0:55201637d936 | 203 | { 2410, 401, -32678, 32 }, |
edy555 | 0:55201637d936 | 204 | { 2811, 401, -32646, 37 }, |
edy555 | 0:55201637d936 | 205 | { 3212, 400, -32609, 42 }, |
edy555 | 0:55201637d936 | 206 | { 3612, 399, -32567, 46 }, |
edy555 | 0:55201637d936 | 207 | { 4011, 399, -32521, 52 }, |
edy555 | 0:55201637d936 | 208 | { 4410, 398, -32469, 57 }, |
edy555 | 0:55201637d936 | 209 | { 4808, 397, -32412, 61 }, |
edy555 | 0:55201637d936 | 210 | { 5205, 397, -32351, 66 }, |
edy555 | 0:55201637d936 | 211 | { 5602, 396, -32285, 72 }, |
edy555 | 0:55201637d936 | 212 | { 5998, 395, -32213, 76 }, |
edy555 | 0:55201637d936 | 213 | { 6393, 393, -32137, 80 }, |
edy555 | 0:55201637d936 | 214 | { 6786, 393, -32057, 86 }, |
edy555 | 0:55201637d936 | 215 | { 7179, 392, -31971, 91 }, |
edy555 | 0:55201637d936 | 216 | { 7571, 391, -31880, 95 }, |
edy555 | 0:55201637d936 | 217 | { 7962, 389, -31785, 100 }, |
edy555 | 0:55201637d936 | 218 | { 8351, 388, -31685, 105 }, |
edy555 | 0:55201637d936 | 219 | { 8739, 387, -31580, 110 }, |
edy555 | 0:55201637d936 | 220 | { 9126, 386, -31470, 114 }, |
edy555 | 0:55201637d936 | 221 | { 9512, 384, -31356, 119 }, |
edy555 | 0:55201637d936 | 222 | { 9896, 382, -31237, 124 }, |
edy555 | 0:55201637d936 | 223 | { 10278, 381, -31113, 128 }, |
edy555 | 0:55201637d936 | 224 | { 10659, 380, -30985, 133 }, |
edy555 | 0:55201637d936 | 225 | { 11039, 378, -30852, 138 }, |
edy555 | 0:55201637d936 | 226 | { 11417, 376, -30714, 143 }, |
edy555 | 0:55201637d936 | 227 | { 11793, 374, -30571, 147 }, |
edy555 | 0:55201637d936 | 228 | { 12167, 372, -30424, 151 }, |
edy555 | 0:55201637d936 | 229 | { 12539, 371, -30273, 156 }, |
edy555 | 0:55201637d936 | 230 | { 12910, 369, -30117, 161 }, |
edy555 | 0:55201637d936 | 231 | { 13279, 366, -29956, 165 }, |
edy555 | 0:55201637d936 | 232 | { 13645, 365, -29791, 170 }, |
edy555 | 0:55201637d936 | 233 | { 14010, 362, -29621, 174 }, |
edy555 | 0:55201637d936 | 234 | { 14372, 360, -29447, 179 }, |
edy555 | 0:55201637d936 | 235 | { 14732, 358, -29268, 183 }, |
edy555 | 0:55201637d936 | 236 | { 15090, 356, -29085, 187 }, |
edy555 | 0:55201637d936 | 237 | { 15446, 354, -28898, 192 }, |
edy555 | 0:55201637d936 | 238 | { 15800, 351, -28706, 196 }, |
edy555 | 0:55201637d936 | 239 | { 16151, 348, -28510, 200 }, |
edy555 | 0:55201637d936 | 240 | { 16499, 347, -28310, 205 }, |
edy555 | 0:55201637d936 | 241 | { 16846, 343, -28105, 209 }, |
edy555 | 0:55201637d936 | 242 | { 17189, 341, -27896, 213 }, |
edy555 | 0:55201637d936 | 243 | { 17530, 339, -27683, 217 }, |
edy555 | 0:55201637d936 | 244 | { 17869, 335, -27466, 221 }, |
edy555 | 0:55201637d936 | 245 | { 18204, 333, -27245, 226 }, |
edy555 | 0:55201637d936 | 246 | { 18537, 331, -27019, 229 }, |
edy555 | 0:55201637d936 | 247 | { 18868, 327, -26790, 234 }, |
edy555 | 0:55201637d936 | 248 | { 19195, 324, -26556, 237 }, |
edy555 | 0:55201637d936 | 249 | { 19519, 322, -26319, 242 }, |
edy555 | 0:55201637d936 | 250 | { 19841, 318, -26077, 245 }, |
edy555 | 0:55201637d936 | 251 | { 20159, 316, -25832, 250 }, |
edy555 | 0:55201637d936 | 252 | { 20475, 312, -25582, 253 }, |
edy555 | 0:55201637d936 | 253 | { 20787, 309, -25329, 257 }, |
edy555 | 0:55201637d936 | 254 | { 21096, 307, -25072, 261 }, |
edy555 | 0:55201637d936 | 255 | { 21403, 302, -24811, 264 }, |
edy555 | 0:55201637d936 | 256 | { 21705, 300, -24547, 268 }, |
edy555 | 0:55201637d936 | 257 | { 22005, 296, -24279, 272 }, |
edy555 | 0:55201637d936 | 258 | { 22301, 293, -24007, 276 }, |
edy555 | 0:55201637d936 | 259 | { 22594, 290, -23731, 279 }, |
edy555 | 0:55201637d936 | 260 | { 22884, 286, -23452, 282 }, |
edy555 | 0:55201637d936 | 261 | { 23170, 282, -23170, 286 }, |
edy555 | 0:55201637d936 | 262 | { 23452, 279, -22884, 290 }, |
edy555 | 0:55201637d936 | 263 | { 23731, 276, -22594, 293 }, |
edy555 | 0:55201637d936 | 264 | { 24007, 272, -22301, 296 }, |
edy555 | 0:55201637d936 | 265 | { 24279, 268, -22005, 300 }, |
edy555 | 0:55201637d936 | 266 | { 24547, 264, -21705, 302 }, |
edy555 | 0:55201637d936 | 267 | { 24811, 261, -21403, 307 }, |
edy555 | 0:55201637d936 | 268 | { 25072, 257, -21096, 309 }, |
edy555 | 0:55201637d936 | 269 | { 25329, 253, -20787, 312 }, |
edy555 | 0:55201637d936 | 270 | { 25582, 250, -20475, 316 }, |
edy555 | 0:55201637d936 | 271 | { 25832, 245, -20159, 318 }, |
edy555 | 0:55201637d936 | 272 | { 26077, 242, -19841, 322 }, |
edy555 | 0:55201637d936 | 273 | { 26319, 237, -19519, 324 }, |
edy555 | 0:55201637d936 | 274 | { 26556, 234, -19195, 327 }, |
edy555 | 0:55201637d936 | 275 | { 26790, 229, -18868, 331 }, |
edy555 | 0:55201637d936 | 276 | { 27019, 226, -18537, 333 }, |
edy555 | 0:55201637d936 | 277 | { 27245, 221, -18204, 335 }, |
edy555 | 0:55201637d936 | 278 | { 27466, 217, -17869, 339 }, |
edy555 | 0:55201637d936 | 279 | { 27683, 213, -17530, 341 }, |
edy555 | 0:55201637d936 | 280 | { 27896, 209, -17189, 343 }, |
edy555 | 0:55201637d936 | 281 | { 28105, 205, -16846, 347 }, |
edy555 | 0:55201637d936 | 282 | { 28310, 200, -16499, 348 }, |
edy555 | 0:55201637d936 | 283 | { 28510, 196, -16151, 351 }, |
edy555 | 0:55201637d936 | 284 | { 28706, 192, -15800, 354 }, |
edy555 | 0:55201637d936 | 285 | { 28898, 187, -15446, 356 }, |
edy555 | 0:55201637d936 | 286 | { 29085, 183, -15090, 358 }, |
edy555 | 0:55201637d936 | 287 | { 29268, 179, -14732, 360 }, |
edy555 | 0:55201637d936 | 288 | { 29447, 174, -14372, 362 }, |
edy555 | 0:55201637d936 | 289 | { 29621, 170, -14010, 365 }, |
edy555 | 0:55201637d936 | 290 | { 29791, 165, -13645, 366 }, |
edy555 | 0:55201637d936 | 291 | { 29956, 161, -13279, 369 }, |
edy555 | 0:55201637d936 | 292 | { 30117, 156, -12910, 371 }, |
edy555 | 0:55201637d936 | 293 | { 30273, 151, -12539, 372 }, |
edy555 | 0:55201637d936 | 294 | { 30424, 147, -12167, 374 }, |
edy555 | 0:55201637d936 | 295 | { 30571, 143, -11793, 376 }, |
edy555 | 0:55201637d936 | 296 | { 30714, 138, -11417, 378 }, |
edy555 | 0:55201637d936 | 297 | { 30852, 133, -11039, 380 }, |
edy555 | 0:55201637d936 | 298 | { 30985, 128, -10659, 381 }, |
edy555 | 0:55201637d936 | 299 | { 31113, 124, -10278, 382 }, |
edy555 | 0:55201637d936 | 300 | { 31237, 119, -9896, 384 }, |
edy555 | 0:55201637d936 | 301 | { 31356, 114, -9512, 386 }, |
edy555 | 0:55201637d936 | 302 | { 31470, 110, -9126, 387 }, |
edy555 | 0:55201637d936 | 303 | { 31580, 105, -8739, 388 }, |
edy555 | 0:55201637d936 | 304 | { 31685, 100, -8351, 389 }, |
edy555 | 0:55201637d936 | 305 | { 31785, 95, -7962, 391 }, |
edy555 | 0:55201637d936 | 306 | { 31880, 91, -7571, 392 }, |
edy555 | 0:55201637d936 | 307 | { 31971, 86, -7179, 393 }, |
edy555 | 0:55201637d936 | 308 | { 32057, 80, -6786, 393 }, |
edy555 | 0:55201637d936 | 309 | { 32137, 76, -6393, 395 }, |
edy555 | 0:55201637d936 | 310 | { 32213, 72, -5998, 396 }, |
edy555 | 0:55201637d936 | 311 | { 32285, 66, -5602, 397 }, |
edy555 | 0:55201637d936 | 312 | { 32351, 61, -5205, 397 }, |
edy555 | 0:55201637d936 | 313 | { 32412, 57, -4808, 398 }, |
edy555 | 0:55201637d936 | 314 | { 32469, 52, -4410, 399 }, |
edy555 | 0:55201637d936 | 315 | { 32521, 46, -4011, 399 }, |
edy555 | 0:55201637d936 | 316 | { 32567, 42, -3612, 400 }, |
edy555 | 0:55201637d936 | 317 | { 32609, 37, -3212, 401 }, |
edy555 | 0:55201637d936 | 318 | { 32646, 32, -2811, 401 }, |
edy555 | 0:55201637d936 | 319 | { 32678, 27, -2410, 401 }, |
edy555 | 0:55201637d936 | 320 | { 32705, 23, -2009, 401 }, |
edy555 | 0:55201637d936 | 321 | { 32728, 17, -1608, 402 }, |
edy555 | 0:55201637d936 | 322 | { 32745, 12, -1206, 402 }, |
edy555 | 0:55201637d936 | 323 | { 32757, 8, -804, 402 }, |
edy555 | 0:55201637d936 | 324 | { 32765, 2, -402, 402 }, |
edy555 | 0:55201637d936 | 325 | { 32767, -2, 0, 402 }, |
edy555 | 0:55201637d936 | 326 | { 32765, -8, 402, 402 }, |
edy555 | 0:55201637d936 | 327 | { 32757, -12, 804, 402 }, |
edy555 | 0:55201637d936 | 328 | { 32745, -17, 1206, 402 }, |
edy555 | 0:55201637d936 | 329 | { 32728, -23, 1608, 401 }, |
edy555 | 0:55201637d936 | 330 | { 32705, -27, 2009, 401 }, |
edy555 | 0:55201637d936 | 331 | { 32678, -32, 2410, 401 }, |
edy555 | 0:55201637d936 | 332 | { 32646, -37, 2811, 401 }, |
edy555 | 0:55201637d936 | 333 | { 32609, -42, 3212, 400 }, |
edy555 | 0:55201637d936 | 334 | { 32567, -46, 3612, 399 }, |
edy555 | 0:55201637d936 | 335 | { 32521, -52, 4011, 399 }, |
edy555 | 0:55201637d936 | 336 | { 32469, -57, 4410, 398 }, |
edy555 | 0:55201637d936 | 337 | { 32412, -61, 4808, 397 }, |
edy555 | 0:55201637d936 | 338 | { 32351, -66, 5205, 397 }, |
edy555 | 0:55201637d936 | 339 | { 32285, -72, 5602, 396 }, |
edy555 | 0:55201637d936 | 340 | { 32213, -76, 5998, 395 }, |
edy555 | 0:55201637d936 | 341 | { 32137, -80, 6393, 393 }, |
edy555 | 0:55201637d936 | 342 | { 32057, -86, 6786, 393 }, |
edy555 | 0:55201637d936 | 343 | { 31971, -91, 7179, 392 }, |
edy555 | 0:55201637d936 | 344 | { 31880, -95, 7571, 391 }, |
edy555 | 0:55201637d936 | 345 | { 31785, -100, 7962, 389 }, |
edy555 | 0:55201637d936 | 346 | { 31685, -105, 8351, 388 }, |
edy555 | 0:55201637d936 | 347 | { 31580, -110, 8739, 387 }, |
edy555 | 0:55201637d936 | 348 | { 31470, -114, 9126, 386 }, |
edy555 | 0:55201637d936 | 349 | { 31356, -119, 9512, 384 }, |
edy555 | 0:55201637d936 | 350 | { 31237, -124, 9896, 382 }, |
edy555 | 0:55201637d936 | 351 | { 31113, -128, 10278, 381 }, |
edy555 | 0:55201637d936 | 352 | { 30985, -133, 10659, 380 }, |
edy555 | 0:55201637d936 | 353 | { 30852, -138, 11039, 378 }, |
edy555 | 0:55201637d936 | 354 | { 30714, -143, 11417, 376 }, |
edy555 | 0:55201637d936 | 355 | { 30571, -147, 11793, 374 }, |
edy555 | 0:55201637d936 | 356 | { 30424, -151, 12167, 372 }, |
edy555 | 0:55201637d936 | 357 | { 30273, -156, 12539, 371 }, |
edy555 | 0:55201637d936 | 358 | { 30117, -161, 12910, 369 }, |
edy555 | 0:55201637d936 | 359 | { 29956, -165, 13279, 366 }, |
edy555 | 0:55201637d936 | 360 | { 29791, -170, 13645, 365 }, |
edy555 | 0:55201637d936 | 361 | { 29621, -174, 14010, 362 }, |
edy555 | 0:55201637d936 | 362 | { 29447, -179, 14372, 360 }, |
edy555 | 0:55201637d936 | 363 | { 29268, -183, 14732, 358 }, |
edy555 | 0:55201637d936 | 364 | { 29085, -187, 15090, 356 }, |
edy555 | 0:55201637d936 | 365 | { 28898, -192, 15446, 354 }, |
edy555 | 0:55201637d936 | 366 | { 28706, -196, 15800, 351 }, |
edy555 | 0:55201637d936 | 367 | { 28510, -200, 16151, 348 }, |
edy555 | 0:55201637d936 | 368 | { 28310, -205, 16499, 347 }, |
edy555 | 0:55201637d936 | 369 | { 28105, -209, 16846, 343 }, |
edy555 | 0:55201637d936 | 370 | { 27896, -213, 17189, 341 }, |
edy555 | 0:55201637d936 | 371 | { 27683, -217, 17530, 339 }, |
edy555 | 0:55201637d936 | 372 | { 27466, -221, 17869, 335 }, |
edy555 | 0:55201637d936 | 373 | { 27245, -226, 18204, 333 }, |
edy555 | 0:55201637d936 | 374 | { 27019, -229, 18537, 331 }, |
edy555 | 0:55201637d936 | 375 | { 26790, -234, 18868, 327 }, |
edy555 | 0:55201637d936 | 376 | { 26556, -237, 19195, 324 }, |
edy555 | 0:55201637d936 | 377 | { 26319, -242, 19519, 322 }, |
edy555 | 0:55201637d936 | 378 | { 26077, -245, 19841, 318 }, |
edy555 | 0:55201637d936 | 379 | { 25832, -250, 20159, 316 }, |
edy555 | 0:55201637d936 | 380 | { 25582, -253, 20475, 312 }, |
edy555 | 0:55201637d936 | 381 | { 25329, -257, 20787, 309 }, |
edy555 | 0:55201637d936 | 382 | { 25072, -261, 21096, 307 }, |
edy555 | 0:55201637d936 | 383 | { 24811, -264, 21403, 302 }, |
edy555 | 0:55201637d936 | 384 | { 24547, -268, 21705, 300 }, |
edy555 | 0:55201637d936 | 385 | { 24279, -272, 22005, 296 }, |
edy555 | 0:55201637d936 | 386 | { 24007, -276, 22301, 293 }, |
edy555 | 0:55201637d936 | 387 | { 23731, -279, 22594, 290 }, |
edy555 | 0:55201637d936 | 388 | { 23452, -282, 22884, 286 }, |
edy555 | 0:55201637d936 | 389 | { 23170, -286, 23170, 282 }, |
edy555 | 0:55201637d936 | 390 | { 22884, -290, 23452, 279 }, |
edy555 | 0:55201637d936 | 391 | { 22594, -293, 23731, 276 }, |
edy555 | 0:55201637d936 | 392 | { 22301, -296, 24007, 272 }, |
edy555 | 0:55201637d936 | 393 | { 22005, -300, 24279, 268 }, |
edy555 | 0:55201637d936 | 394 | { 21705, -302, 24547, 264 }, |
edy555 | 0:55201637d936 | 395 | { 21403, -307, 24811, 261 }, |
edy555 | 0:55201637d936 | 396 | { 21096, -309, 25072, 257 }, |
edy555 | 0:55201637d936 | 397 | { 20787, -312, 25329, 253 }, |
edy555 | 0:55201637d936 | 398 | { 20475, -316, 25582, 250 }, |
edy555 | 0:55201637d936 | 399 | { 20159, -318, 25832, 245 }, |
edy555 | 0:55201637d936 | 400 | { 19841, -322, 26077, 242 }, |
edy555 | 0:55201637d936 | 401 | { 19519, -324, 26319, 237 }, |
edy555 | 0:55201637d936 | 402 | { 19195, -327, 26556, 234 }, |
edy555 | 0:55201637d936 | 403 | { 18868, -331, 26790, 229 }, |
edy555 | 0:55201637d936 | 404 | { 18537, -333, 27019, 226 }, |
edy555 | 0:55201637d936 | 405 | { 18204, -335, 27245, 221 }, |
edy555 | 0:55201637d936 | 406 | { 17869, -339, 27466, 217 }, |
edy555 | 0:55201637d936 | 407 | { 17530, -341, 27683, 213 }, |
edy555 | 0:55201637d936 | 408 | { 17189, -343, 27896, 209 }, |
edy555 | 0:55201637d936 | 409 | { 16846, -347, 28105, 205 }, |
edy555 | 0:55201637d936 | 410 | { 16499, -348, 28310, 200 }, |
edy555 | 0:55201637d936 | 411 | { 16151, -351, 28510, 196 }, |
edy555 | 0:55201637d936 | 412 | { 15800, -354, 28706, 192 }, |
edy555 | 0:55201637d936 | 413 | { 15446, -356, 28898, 187 }, |
edy555 | 0:55201637d936 | 414 | { 15090, -358, 29085, 183 }, |
edy555 | 0:55201637d936 | 415 | { 14732, -360, 29268, 179 }, |
edy555 | 0:55201637d936 | 416 | { 14372, -362, 29447, 174 }, |
edy555 | 0:55201637d936 | 417 | { 14010, -365, 29621, 170 }, |
edy555 | 0:55201637d936 | 418 | { 13645, -366, 29791, 165 }, |
edy555 | 0:55201637d936 | 419 | { 13279, -369, 29956, 161 }, |
edy555 | 0:55201637d936 | 420 | { 12910, -371, 30117, 156 }, |
edy555 | 0:55201637d936 | 421 | { 12539, -372, 30273, 151 }, |
edy555 | 0:55201637d936 | 422 | { 12167, -374, 30424, 147 }, |
edy555 | 0:55201637d936 | 423 | { 11793, -376, 30571, 143 }, |
edy555 | 0:55201637d936 | 424 | { 11417, -378, 30714, 138 }, |
edy555 | 0:55201637d936 | 425 | { 11039, -380, 30852, 133 }, |
edy555 | 0:55201637d936 | 426 | { 10659, -381, 30985, 128 }, |
edy555 | 0:55201637d936 | 427 | { 10278, -382, 31113, 124 }, |
edy555 | 0:55201637d936 | 428 | { 9896, -384, 31237, 119 }, |
edy555 | 0:55201637d936 | 429 | { 9512, -386, 31356, 114 }, |
edy555 | 0:55201637d936 | 430 | { 9126, -387, 31470, 110 }, |
edy555 | 0:55201637d936 | 431 | { 8739, -388, 31580, 105 }, |
edy555 | 0:55201637d936 | 432 | { 8351, -389, 31685, 100 }, |
edy555 | 0:55201637d936 | 433 | { 7962, -391, 31785, 95 }, |
edy555 | 0:55201637d936 | 434 | { 7571, -392, 31880, 91 }, |
edy555 | 0:55201637d936 | 435 | { 7179, -393, 31971, 86 }, |
edy555 | 0:55201637d936 | 436 | { 6786, -393, 32057, 80 }, |
edy555 | 0:55201637d936 | 437 | { 6393, -395, 32137, 76 }, |
edy555 | 0:55201637d936 | 438 | { 5998, -396, 32213, 72 }, |
edy555 | 0:55201637d936 | 439 | { 5602, -397, 32285, 66 }, |
edy555 | 0:55201637d936 | 440 | { 5205, -397, 32351, 61 }, |
edy555 | 0:55201637d936 | 441 | { 4808, -398, 32412, 57 }, |
edy555 | 0:55201637d936 | 442 | { 4410, -399, 32469, 52 }, |
edy555 | 0:55201637d936 | 443 | { 4011, -399, 32521, 46 }, |
edy555 | 0:55201637d936 | 444 | { 3612, -400, 32567, 42 }, |
edy555 | 0:55201637d936 | 445 | { 3212, -401, 32609, 37 }, |
edy555 | 0:55201637d936 | 446 | { 2811, -401, 32646, 32 }, |
edy555 | 0:55201637d936 | 447 | { 2410, -401, 32678, 27 }, |
edy555 | 0:55201637d936 | 448 | { 2009, -401, 32705, 23 }, |
edy555 | 0:55201637d936 | 449 | { 1608, -402, 32728, 17 }, |
edy555 | 0:55201637d936 | 450 | { 1206, -402, 32745, 12 }, |
edy555 | 0:55201637d936 | 451 | { 804, -402, 32757, 8 }, |
edy555 | 0:55201637d936 | 452 | { 402, -402, 32765, 2 }, |
edy555 | 0:55201637d936 | 453 | { 0, -402, 32767, 0 } |
edy555 | 0:55201637d936 | 454 | }; |
edy555 | 0:55201637d936 | 455 | |
edy555 | 0:55201637d936 | 456 | static inline |
edy555 | 0:55201637d936 | 457 | uint32_t cos_sin(int16_t x) |
edy555 | 0:55201637d936 | 458 | { |
edy555 | 0:55201637d936 | 459 | int idx = x >> 8; |
edy555 | 0:55201637d936 | 460 | int mod = x & 0xff; |
edy555 | 0:55201637d936 | 461 | int r = __PKHBT(0x00000100, mod, 16); |
edy555 | 0:55201637d936 | 462 | uint32_t *e = (uint32_t *)&cos_sin_table[idx+128]; |
edy555 | 0:55201637d936 | 463 | uint32_t c = e[0]; |
edy555 | 0:55201637d936 | 464 | uint32_t s = e[1]; |
edy555 | 0:55201637d936 | 465 | c = __SMUAD(r, c); |
edy555 | 0:55201637d936 | 466 | s = __SMUAD(r, s); |
edy555 | 0:55201637d936 | 467 | c >>= 8; |
edy555 | 0:55201637d936 | 468 | s >>= 8; |
edy555 | 0:55201637d936 | 469 | return __PKHBT(s, c, 16); |
edy555 | 0:55201637d936 | 470 | } |
edy555 | 0:55201637d936 | 471 | |
edy555 | 0:55201637d936 | 472 | FMModState fmmod; |
edy555 | 0:55201637d936 | 473 | |
edy555 | 0:55201637d936 | 474 | void |
edy555 | 0:55201637d936 | 475 | fmmod_init(FMModState *fmmod) |
edy555 | 0:55201637d936 | 476 | { |
edy555 | 0:55201637d936 | 477 | fmmod->vec = 0x7fff0000; |
edy555 | 0:55201637d936 | 478 | } |
edy555 | 0:55201637d936 | 479 | |
edy555 | 0:55201637d936 | 480 | void |
edy555 | 0:55201637d936 | 481 | frequency_modulation(FMModState *fmmod, uint32_t *src, uint32_t *dst, int dst_len) |
edy555 | 0:55201637d936 | 482 | { |
edy555 | 0:55201637d936 | 483 | int j; |
edy555 | 0:55201637d936 | 484 | uint32_t vec = fmmod->vec; |
edy555 | 0:55201637d936 | 485 | for (j = 0; j < dst_len; j++) { |
edy555 | 0:55201637d936 | 486 | uint32_t s = *src++; |
edy555 | 0:55201637d936 | 487 | // fetch only R-ch (top half of word) |
edy555 | 0:55201637d936 | 488 | int16_t x = s >> 16; |
edy555 | 0:55201637d936 | 489 | uint32_t cs = cos_sin(x); |
edy555 | 0:55201637d936 | 490 | uint32_t real = __SMUSD(vec, cs); |
edy555 | 0:55201637d936 | 491 | uint32_t imag = __SMUADX(vec, cs); |
edy555 | 0:55201637d936 | 492 | real >>= 15; |
edy555 | 0:55201637d936 | 493 | imag >>= 15; |
edy555 | 0:55201637d936 | 494 | vec = __PKHBT(imag, real, 16); |
edy555 | 0:55201637d936 | 495 | *dst++ = vec; |
edy555 | 0:55201637d936 | 496 | } |
edy555 | 0:55201637d936 | 497 | #if 1 |
edy555 | 0:55201637d936 | 498 | uint32_t mag = __SMUAD(vec, vec); |
edy555 | 0:55201637d936 | 499 | if (mag < 0x10000) { |
edy555 | 0:55201637d936 | 500 | // force initialize |
edy555 | 0:55201637d936 | 501 | vec = 0x7fff0000; |
edy555 | 0:55201637d936 | 502 | } else if (mag < 0x3ff00000) { |
edy555 | 0:55201637d936 | 503 | uint32_t d = __PKHBT((int16_t)(vec&0xffff) >> 12, vec >> 12, 0); |
edy555 | 0:55201637d936 | 504 | vec = __QADD16(vec, d); |
edy555 | 0:55201637d936 | 505 | } |
edy555 | 0:55201637d936 | 506 | #endif |
edy555 | 0:55201637d936 | 507 | fmmod->vec = vec; |
edy555 | 0:55201637d936 | 508 | } |
edy555 | 0:55201637d936 | 509 | |
edy555 | 0:55201637d936 | 510 | void |
edy555 | 0:55201637d936 | 511 | amplitude_modulation(uint32_t *src, uint32_t *dst, int dst_len) |
edy555 | 0:55201637d936 | 512 | { |
edy555 | 0:55201637d936 | 513 | int j; |
edy555 | 0:55201637d936 | 514 | for (j = 0; j < dst_len; j++) { |
edy555 | 0:55201637d936 | 515 | uint32_t s = *src++; |
edy555 | 0:55201637d936 | 516 | // fetch only R-ch (top half of word) and halving it |
edy555 | 0:55201637d936 | 517 | int16_t x = s >> 16; |
edy555 | 0:55201637d936 | 518 | // add DC and set zero at quadrature |
edy555 | 0:55201637d936 | 519 | x /= 2; |
edy555 | 0:55201637d936 | 520 | x += 0x4000; |
edy555 | 0:55201637d936 | 521 | *dst++ = x & 0xffff; |
edy555 | 0:55201637d936 | 522 | } |
edy555 | 0:55201637d936 | 523 | } |