c983a3c705
Phase 0+ timing optimization (attempts #13-22 + implementation): NCO (nco_400m_enhanced.v): - 4-stage pipeline: DSP48E1 accumulate -> LUT read -> negate -> quadrant MUX - DSP48E1 phase accumulator in P=P+C mode (eliminates 8-stage CARRY4 chain) - Registered phase_inc_dithered to break cascaded 32-bit add path DDC (ddc_400m.v): - Direct DSP48E1 instantiation for I/Q mixers (AREG=1, BREG=1, MREG=1, PREG=1) - CEP=1, RSTP=!reset_n for proper pipeline control - 3-stage dsp_valid_pipe for PREG=1 latency - Behavioral sim model under ifdef SIMULATION for Icarus compatibility CIC (cic_decimator_4x_enhanced.v): - 28-bit accumulators (was 36) per CIC width formula: 18 + 5*log2(4) = 28 - Removed integrator/comb saturation (CIC uses wrapping arithmetic by design) - Pipelined output saturation comparison CDC/ASYNC_REG: - ASYNC_REG attribute on all CDC synchronizer registers (cdc_modules.v, radar_system_top.v, usb_data_interface.v) - Sync reset in generate blocks (cdc_modules.v) Results: Vivado post-implementation WNS=+1.196ns, 0 failing endpoints, 850 LUTs (1.34%), 466 FFs (0.37%), 2 DSP48E1 (0.83%) on xc7a100t. All testbenches pass: 241/244 (3 known stub failures).
3.1 KiB
3.1 KiB
| 1 | sample | sin_out | cos_out |
|---|---|---|---|
| 2 | 0 | 22005 | 23731 |
| 3 | 1 | 22594 | 23170 |
| 4 | 2 | 22594 | 23170 |
| 5 | 3 | 26319 | 18868 |
| 6 | 4 | 28898 | 14732 |
| 7 | 5 | 31113 | 9512 |
| 8 | 6 | 32285 | 4808 |
| 9 | 7 | 32757 | 0 |
| 10 | 8 | 32285 | -4808 |
| 11 | 9 | 31113 | -9512 |
| 12 | 10 | 28898 | -14732 |
| 13 | 11 | 26319 | -18868 |
| 14 | 12 | 23170 | -22594 |
| 15 | 13 | 18868 | -26319 |
| 16 | 14 | 14732 | -28898 |
| 17 | 15 | 9512 | -31113 |
| 18 | 16 | 4808 | -32285 |
| 19 | 17 | 0 | -32757 |
| 20 | 18 | -32285 | -4808 |
| 21 | 19 | -31113 | -9512 |
| 22 | 20 | -28898 | -14732 |
| 23 | 21 | -26319 | -18868 |
| 24 | 22 | -23170 | -22594 |
| 25 | 23 | -18868 | -26319 |
| 26 | 24 | -14732 | -28898 |
| 27 | 25 | -9512 | -31113 |
| 28 | 26 | -4808 | -32285 |
| 29 | 27 | 0 | -32757 |
| 30 | 28 | -4808 | 32285 |
| 31 | 29 | -9512 | 31113 |
| 32 | 30 | -14732 | 28898 |
| 33 | 31 | -18868 | 26319 |
| 34 | 32 | -22594 | 23170 |
| 35 | 33 | -26319 | 18868 |
| 36 | 34 | -28898 | 14732 |
| 37 | 35 | -31113 | 9512 |
| 38 | 36 | -32285 | 4808 |
| 39 | 37 | -32757 | 0 |
| 40 | 38 | 4808 | 32285 |
| 41 | 39 | 9512 | 31113 |
| 42 | 40 | 14732 | 28898 |
| 43 | 41 | 18868 | 26319 |
| 44 | 42 | 22594 | 23170 |
| 45 | 43 | 26319 | 18868 |
| 46 | 44 | 28898 | 14732 |
| 47 | 45 | 31113 | 9512 |
| 48 | 46 | 32285 | 4808 |
| 49 | 47 | 32757 | 0 |
| 50 | 48 | 32285 | -4808 |
| 51 | 49 | 31113 | -9512 |
| 52 | 50 | 28898 | -14732 |
| 53 | 51 | 26319 | -18868 |
| 54 | 52 | 23170 | -22594 |
| 55 | 53 | 18868 | -26319 |
| 56 | 54 | 14732 | -28898 |
| 57 | 55 | 9512 | -31113 |
| 58 | 56 | 4808 | -32285 |
| 59 | 57 | 0 | -32757 |
| 60 | 58 | -32285 | -4808 |
| 61 | 59 | -31113 | -9512 |
| 62 | 60 | -28898 | -14732 |
| 63 | 61 | -26319 | -18868 |
| 64 | 62 | -23170 | -22594 |
| 65 | 63 | -18868 | -26319 |
| 66 | 64 | -14732 | -28898 |
| 67 | 65 | -9512 | -31113 |
| 68 | 66 | -4808 | -32285 |
| 69 | 67 | 0 | -32757 |
| 70 | 68 | -4808 | 32285 |
| 71 | 69 | -9512 | 31113 |
| 72 | 70 | -14732 | 28898 |
| 73 | 71 | -18868 | 26319 |
| 74 | 72 | -22594 | 23170 |
| 75 | 73 | -26319 | 18868 |
| 76 | 74 | -28898 | 14732 |
| 77 | 75 | -31113 | 9512 |
| 78 | 76 | -32285 | 4808 |
| 79 | 77 | -32757 | 0 |
| 80 | 78 | 4808 | 32285 |
| 81 | 79 | 9512 | 31113 |
| 82 | 80 | 14732 | 28898 |
| 83 | 81 | 18868 | 26319 |
| 84 | 82 | 22594 | 23170 |
| 85 | 83 | 26319 | 18868 |
| 86 | 84 | 28898 | 14732 |
| 87 | 85 | 31113 | 9512 |
| 88 | 86 | 32285 | 4808 |
| 89 | 87 | 32757 | 0 |
| 90 | 88 | 32285 | -4808 |
| 91 | 89 | 31113 | -9512 |
| 92 | 90 | 28898 | -14732 |
| 93 | 91 | 26319 | -18868 |
| 94 | 92 | 23170 | -22594 |
| 95 | 93 | 18868 | -26319 |
| 96 | 94 | 14732 | -28898 |
| 97 | 95 | 9512 | -31113 |
| 98 | 96 | 4808 | -32285 |
| 99 | 97 | 0 | -32757 |
| 100 | 98 | -32285 | -4808 |
| 101 | 99 | -31113 | -9512 |
| 102 | 100 | -28898 | -14732 |
| 103 | 101 | -26319 | -18868 |
| 104 | 102 | -23170 | -22594 |
| 105 | 103 | -18868 | -26319 |
| 106 | 104 | -14732 | -28898 |
| 107 | 105 | -9512 | -31113 |
| 108 | 106 | -4808 | -32285 |
| 109 | 107 | 0 | -32757 |
| 110 | 108 | -4808 | 32285 |
| 111 | 109 | -9512 | 31113 |
| 112 | 110 | -14732 | 28898 |
| 113 | 111 | -18868 | 26319 |
| 114 | 112 | -22594 | 23170 |
| 115 | 113 | -26319 | 18868 |
| 116 | 114 | -28898 | 14732 |
| 117 | 115 | -31113 | 9512 |
| 118 | 116 | -32285 | 4808 |
| 119 | 117 | -32757 | 0 |
| 120 | 118 | 4808 | 32285 |
| 121 | 119 | 9512 | 31113 |
| 122 | 120 | 14732 | 28898 |
| 123 | 121 | 18868 | 26319 |
| 124 | 122 | 22594 | 23170 |
| 125 | 123 | 26319 | 18868 |
| 126 | 124 | 28898 | 14732 |
| 127 | 125 | 31113 | 9512 |
| 128 | 126 | 32285 | 4808 |
| 129 | 127 | 32757 | 0 |
| 130 | 128 | 32285 | -4808 |
| 131 | 129 | 31113 | -9512 |
| 132 | 130 | 28898 | -14732 |
| 133 | 131 | 26319 | -18868 |
| 134 | 132 | 23170 | -22594 |
| 135 | 133 | 18868 | -26319 |
| 136 | 134 | 14732 | -28898 |
| 137 | 135 | 9512 | -31113 |
| 138 | 136 | 4808 | -32285 |
| 139 | 137 | 0 | -32757 |
| 140 | 138 | -32285 | -4808 |
| 141 | 139 | -31113 | -9512 |
| 142 | 140 | -28898 | -14732 |
| 143 | 141 | -26319 | -18868 |
| 144 | 142 | -23170 | -22594 |
| 145 | 143 | -18868 | -26319 |
| 146 | 144 | -14732 | -28898 |
| 147 | 145 | -9512 | -31113 |
| 148 | 146 | -4808 | -32285 |
| 149 | 147 | 0 | -32757 |
| 150 | 148 | -4808 | 32285 |
| 151 | 149 | -9512 | 31113 |
| 152 | 150 | -14732 | 28898 |
| 153 | 151 | -18868 | 26319 |
| 154 | 152 | -22594 | 23170 |
| 155 | 153 | -26319 | 18868 |
| 156 | 154 | -28898 | 14732 |
| 157 | 155 | -31113 | 9512 |
| 158 | 156 | -32285 | 4808 |
| 159 | 157 | -32757 | 0 |
| 160 | 158 | 4808 | 32285 |
| 161 | 159 | 9512 | 31113 |
| 162 | 160 | 14732 | 28898 |
| 163 | 161 | 18868 | 26319 |
| 164 | 162 | 22594 | 23170 |
| 165 | 163 | 26319 | 18868 |
| 166 | 164 | 28898 | 14732 |
| 167 | 165 | 31113 | 9512 |
| 168 | 166 | 32285 | 4808 |
| 169 | 167 | 32757 | 0 |
| 170 | 168 | 32285 | -4808 |
| 171 | 169 | 31113 | -9512 |
| 172 | 170 | 28898 | -14732 |
| 173 | 171 | 26319 | -18868 |
| 174 | 172 | 23170 | -22594 |
| 175 | 173 | 18868 | -26319 |
| 176 | 174 | 14732 | -28898 |
| 177 | 175 | 9512 | -31113 |
| 178 | 176 | 4808 | -32285 |
| 179 | 177 | 0 | -32757 |
| 180 | 178 | -32285 | -4808 |
| 181 | 179 | -31113 | -9512 |
| 182 | 180 | -28898 | -14732 |
| 183 | 181 | -26319 | -18868 |
| 184 | 182 | -23170 | -22594 |
| 185 | 183 | -18868 | -26319 |
| 186 | 184 | -14732 | -28898 |
| 187 | 185 | -9512 | -31113 |
| 188 | 186 | -4808 | -32285 |
| 189 | 187 | 0 | -32757 |
| 190 | 188 | -4808 | 32285 |
| 191 | 189 | -9512 | 31113 |
| 192 | 190 | -14732 | 28898 |
| 193 | 191 | -18868 | 26319 |
| 194 | 192 | -22594 | 23170 |
| 195 | 193 | -26319 | 18868 |
| 196 | 194 | -28898 | 14732 |
| 197 | 195 | -31113 | 9512 |
| 198 | 196 | -32285 | 4808 |
| 199 | 197 | -32757 | 0 |
| 200 | 198 | 4808 | 32285 |
| 201 | 199 | 9512 | 31113 |