7cdfa486e5
Register map: 0x10-0x15 chirp timing overrides, 0xFF status readback, 0x03 CFAR threshold now wired to actual compare, 0x04 stream control gates USB write FSM. Status readback sends 7-word packet (0xBB header, 5 status words, 0x55 footer) via toggle CDC. radar_mode_controller: 6 cfg_* input ports replace hardcoded parameters. usb_data_interface: stream_control CDC, status_request toggle CDC, SEND_STATUS state (3'd7), stream gating in IDLE/HEADER/RANGE/DOPPLER. radar_system_top: 6 host registers + command decode for 0x10-0x15/0xFF. radar_receiver_final: 6 host_* timing passthrough ports. Testbench coverage: RMC 81 checks (+TG16 runtime reconfig), USB 77 checks (+TG15 stream gating, TG16 status readback, TG17 chirp opcodes). Fixed iverilog 13.0 forward-ref for status_req_toggle_100m.