Jason 58154a6bf1 fpga: split gpio_dig5/dig7 by fault class (AUDIT-S10) ...

gpio_dig5 (PD13) previously OR'd six flags — four signal-saturation
classes (AGC, DDC overflow, DDC saturation, MTI saturation) and two
control-fault classes (range-decimator watchdog from F-6.4, CIC->FIR
CDC overrun from F-1.2). The MCU outer-loop AGC reduces RF gain on
PD13 assertion, which is the wrong response to a watchdog or CDC
stall — it just hides the stall behind a quiet receive chain. gpio_dig7
(PD15) was tied 1'b0 as "reserved".

Split:
  gpio_dig5 = signal-saturation only (AGC continues to react correctly)
  gpio_dig7 = control-fault classes

Telemetry: status_words[5][6:5] now exposes the two control-fault
classes in BOTH legacy (FT601) and FT2232H USB variants, with 2-FF
level CDC sync from clk_100m to ft601_clk_in / ft_clk. Bit [7] is
reserved. AUDIT-C12's frame_drop_count at [31:25] is preserved.

50T XDC H12 -> gpio_dig7 pin already assigned (audit AUDIT-C15-era);
no XDC change.

Test: tb/tb_audit_s10_gpio_split.v 17/17 PASS — exercises both the
combinational GPIO split and the CDC status-word packing path.
Regression: 39/39 PASS (was 34/34).

2026-04-29 20:06:52 +05:45

..

9_1_Microcontroller

mcu(bmp180): call cal-coefficient init at boot + watchdog cadence fix (AUDIT-CAL)

2026-04-29 19:21:35 +05:45

9_2_FPGA

fpga: split gpio_dig5/dig7 by fault class (AUDIT-S10)

2026-04-29 20:06:52 +05:45

9_3_GUI

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tests/cross_layer

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tools

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