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36ad15247ce32ecdf939130eeea6a59c4fb2e36f
PLFM_RADAR/9_Firmware/9_2_FPGA
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Jason 36ad15247c Split fft_engine FSM: async reset for control, sync reset for DSP/BRAM datapath (Build 11) 
Split monolithic always block into two:
- Block 1 (async reset): FSM state, counters, output interface
  (dout_re/im, dout_valid, done) — deterministic startup
- Block 2 (sync reset): DSP/BRAM pipeline registers (rd_b_re/im,
  rd_tw_cos/sin, bf_prod_re/im, rd_a_re/im, bf_t_re/im, rd_tw_idx,
  rd_addr_even/odd, rd_inverse) — enables hard block absorption

Also convert output pipeline (out_pipe_valid/inverse) to sync reset.

Expected synthesis impact:
- DSP48E1 AREG/BREG absorption for butterfly multiply inputs
- DSP48E1 PREG absorption for multiply outputs (bf_prod_re/im)
- BRAM output register absorption for rd_a_re/im
- Eliminate ~300 DPIR-1 methodology warnings per FFT instance
- Resolve DPOP-2 (PREG=0), RBOR-1 (BRAM DOA), REQP-1839/1840

13/13 regression suites pass. Integration golden: 2048/2048 exact match.
2026-03-17 21:40:09 +02:00
..
constraints
Fix CDC reset domain bug (P0), strengthen testbenches with 31 structural assertions
2026-03-17 19:38:09 +02:00
formal
Fix CDC reset domain bug (P0), strengthen testbenches with 31 structural assertions
2026-03-17 19:38:09 +02:00
scripts
Fix all 10 CDC bugs from report_cdc audit, add overflow guard in range_bin_decimator
2026-03-17 13:48:47 +02:00
tb
Rewrite integration testbench with golden self-reference comparison + physics bounds checks
2026-03-17 20:56:28 +02:00
ad9484_interface_400m.v
Migrate hardware platform from XC7A50T to XC7A200T-2FBG484I
2026-03-16 22:24:22 +02:00
cdc_modules.v
Fix CDC reset domain bug (P0), strengthen testbenches with 31 structural assertions
2026-03-17 19:38:09 +02:00
chirp_memory_loader_param.v
Fix 6 RTL files + add xfft_32 stub for successful Vivado synthesis
2026-03-15 17:37:59 +02:00
cic_decimator_4x_enhanced.v
Convert CIC comb + FIR delay_line to sync reset for DSP48 absorption (Build 10)
2026-03-17 20:56:42 +02:00
dac_interface_single.v
Migrate hardware platform from XC7A50T to XC7A200T-2FBG484I
2026-03-16 22:24:22 +02:00
ddc_400m.v
Fix CDC reset domain bug (P0), strengthen testbenches with 31 structural assertions
2026-03-17 19:38:09 +02:00
ddc_input_interface.v
Fix ddc_input_interface 18->16 bit overflow: add saturation at positive full scale
2026-03-16 18:14:06 +02:00
doppler_processor.v
Convert async→sync reset on DSP/BRAM datapath registers for timing closure
2026-03-17 20:11:13 +02:00
edge_detector.v
Fix all 10 CDC bugs from report_cdc audit, add overflow guard in range_bin_decimator
2026-03-17 13:48:47 +02:00
fft_engine.v
Split fft_engine FSM: async reset for control, sync reset for DSP/BRAM datapath (Build 11)
2026-03-17 21:40:09 +02:00
fft_twiddle_32.mem
Replace FFT stubs with synthesizable radix-2 DIT engine, fix BRAM inference
2026-03-16 10:25:07 +02:00
fft_twiddle_1024.mem
Replace FFT stubs with synthesizable radix-2 DIT engine, fix BRAM inference
2026-03-16 10:25:07 +02:00
fir_lowpass.v
Convert CIC comb + FIR delay_line to sync reset for DSP48 absorption (Build 10)
2026-03-17 20:56:42 +02:00
frequency_matched_filter.v
Convert async→sync reset on DSP/BRAM datapath registers for timing closure
2026-03-17 20:11:13 +02:00
latency_buffer_2159.v
Fix CDC reset domain bug (P0), strengthen testbenches with 31 structural assertions
2026-03-17 19:38:09 +02:00
long_chirp_seg0_i.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
long_chirp_seg0_q.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
long_chirp_seg1_i.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
long_chirp_seg1_q.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
long_chirp_seg2_i.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
long_chirp_seg2_q.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
long_chirp_seg3_i.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
long_chirp_seg3_q.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
matched_filter_multi_segment.v
Fix overlap-save: fill full 1024-sample buffer per segment, zero-pad last partial segment
2026-03-16 19:15:23 +02:00
matched_filter_processing_chain.v
Replace FFT stubs with synthesizable radix-2 DIT engine, fix BRAM inference
2026-03-16 10:25:07 +02:00
nco_400m_enhanced.v
Fix P0/P1 RTL bugs found during pre-hardware audit
2026-03-16 22:24:06 +02:00
plfm_chirp_controller.v
Fix 6 RTL bugs in FPGA signal processing chain
2026-03-15 06:14:04 +02:00
radar_mode_controller.v
Add SymbiYosys formal verification for 6 modules, fix 2 doppler bugs
2026-03-17 12:47:22 +02:00
radar_receiver_final.v
Fix P0/P1 RTL bugs found during pre-hardware audit
2026-03-16 22:24:06 +02:00
radar_system_top.v
Fix CDC reset domain bug (P0), strengthen testbenches with 31 structural assertions
2026-03-17 19:38:09 +02:00
radar_transmitter.v
Fix CDC reset domain bug (P0), strengthen testbenches with 31 structural assertions
2026-03-17 19:38:09 +02:00
range_bin_decimator.v
Fix range_bin_decimator overflow guard priority bug: group completion now takes precedence over overflow guard in ST_PROCESS, ensuring all OUTPUT_BINS outputs are emitted when sufficient input samples exist. Split formal property 5 into 5a (upper bound) and 5b (exact count when start_bin=0), added Cover 4 for overflow guard path, reduced BMC depth to 50.
2026-03-17 15:41:06 +02:00
short_chirp_i.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
short_chirp_q.mem
Regenerate chirp .mem files, add USB testbench, convert radar_system_tb to Verilog-2001
2026-03-16 19:53:40 +02:00
usb_data_interface.v
Fix all 10 CDC bugs from report_cdc audit, add overflow guard in range_bin_decimator
2026-03-17 13:48:47 +02:00
xfft_32.v
Replace FFT stubs with synthesizable radix-2 DIT engine, fix BRAM inference
2026-03-16 10:25:07 +02:00