Jason 23b2beee53 fix: resolve 3 cross-layer bugs (status_words truncation, mode readback, buffer overread) ...

Bug 1 (FPGA): status_words[0] was 37 bits (8+3+2+5+3+16), silently
truncated to 32. Restructured to {0xFF, mode[1:0], stream[2:0],
3'b000, threshold[15:0]} = 32 bits exactly. Fixed in both
usb_data_interface_ft2232h.v and usb_data_interface.v.

Bug 2 (Python): radar_mode extracted at bit 21 but was actually at
bit 24 after truncation — always returned 0. Updated shift/mask in
parse_status_packet() to match new layout (mode>>22, stream>>19).

Bug 3 (STM32): parseFromUSB() minimum size check was 74 bytes but
9 doubles + uint32 + markers = 82 bytes. Buffer overread on last
fields when 74-81 bytes passed.

All 166 tests pass (29 cross-layer, 92 GUI, 20 MCU, 25 FPGA).

2026-04-12 22:51:26 +05:45

..

.gitignore

feat: add cross-layer contract tests (Python/Verilog/C) with CI job

2026-04-12 16:04:59 +05:45

contract_parser.py

feat: add cross-layer contract tests (Python/Verilog/C) with CI job

2026-04-12 16:04:59 +05:45

stm32_settings_stub.cpp

feat: add cross-layer contract tests (Python/Verilog/C) with CI job

2026-04-12 16:04:59 +05:45

tb_cross_layer_ft2232h.v

feat: add cross-layer contract tests (Python/Verilog/C) with CI job

2026-04-12 16:04:59 +05:45

test_cross_layer_contract.py

fix: resolve 3 cross-layer bugs (status_words truncation, mode readback, buffer overread)

2026-04-12 22:51:26 +05:45