feat(fpga,mcu,gui): PR-AB.b — drift-free dwell sync via DIG_6 frame_pulse + AGC always-on policy

FPGA (Phase 1+2):
- gpio_dig6 (PD14) now carries chirp_scheduler frame_pulse, FPGA-stretched
  to ~100 ns so the STM32 EXTI on PD14 can latch reliably.
- gpio_dig7 (PD15) returns to its pre-PR-AB.b role: control-fault OR
  (range_decim_watchdog | CDC overrun); MCU stuck-high sampler unchanged.
- rx_range_decim_watchdog gains a sticky in source clock domain so a slow
  status poll cannot miss a 1-cycle assertion (Phase 1).
- New tb_dig6_frame_pulse.v (13 checks); tb_status_words_stickies.v extended
  with DIG_7 fault-OR coverage (14 checks); retired tb_audit_s10_gpio_split.v.
- Port comments in radar_system_top.v / _50t.v and XDC roles refreshed.

MCU (Phase 3):
- PD14 reconfigured to GPIO_MODE_IT_RISING + GPIO_PULLDOWN; new
  EXTI15_10_IRQHandler in stm32f7xx_it.c dispatches to HAL_GPIO_EXTI_Callback
  that bumps a volatile g_frame_pulse_count.
- runRadarPulseSequence dwell loop replaces 3x HAL_Delay(8) with
  waitForFramePulse(20) — per-pattern dwell now tracks the actual mask-aware
  ladder length (drift-free, mask-aware), with a 20 ms timeout safety net.
- AGC outer loop is ALWAYS-ON in production (compile-time policy); bench
  builds compile the body out via -DMCU_AGC_FORCE_DISABLED. The runtime
  enable/debounce + DIG_6 polling that previously gated AGC are removed.
- main.h adds FPGA_FRAME_PULSE_* aliases pointing at FPGA_DIG6_*.

GUI (Phase 4):
- Settings tab gains a Bench / Diagnostics group with a BENCH-MODE checkbox
  (off by default, persisted via QSettings).
- AGC group header swaps between a green "AGC: ALWAYS-ON" badge (production)
  and Enable/Disable AGC buttons (bench), pinned to the top of the group.
  The redundant 0/1 spinbox row for opcode 0x28 is removed — buttons send
  the same opcode and cannot accept invalid input.
- Both the FPGA Control AGC Status box and the AGC Monitor strip share a
  helper that honours bench-mode in production (always shows ALWAYS-ON in
  green so the two views never disagree with the badge).
- _add_fpga_param_row uses setFixedWidth on label and Set button + explicit
  stretch=1 on the hint, so all rows align column-wise whether they sit
  directly in a QVBoxLayout or inside a wrapper QWidget.

Regression: FPGA 42/0/0 (PR-M.4 baseline) - MCU 34/34 - GPS extended 51/51
- GUI v7 150/150 - BENCH-MODE flip behaviorally verified.
Hardware-blocked steps deferred: bench-scope verify (PD14 dwell pulse,
counter advance, PD15 stuck-high recovery still triggers).

Closes #182.
This commit is contained in:
Jason
2026-05-07 13:29:48 +05:45
parent b215caa294
commit ada170ef1f
11 changed files with 655 additions and 257 deletions
@@ -0,0 +1,205 @@
// ============================================================================
// tb_dig6_frame_pulse.v
//
// PR-AB.b: gpio_dig6 (PD14) carries the chirp_scheduler frame_pulse, stretched
// to ~100 ns so the STM32 EXTI on PD14 can latch the rising edge reliably.
// The MCU dwell loop (runRadarPulseSequence) replaces
// HAL_Delay(BEAM_PATTERN_DWELL_MS) with osSemaphoreAcquire so per-pattern
// dwell tracks the actual ladder length — drift-free, mask-aware.
//
// Companion to tb_status_words_stickies.v which covers the gpio_dig7 fault-OR
// (watchdog | CDC overrun) semantic and the status_words[5][6:5] CDC packing.
//
// This TB mirrors the production stretcher fragment from radar_system_top.v
// and asserts:
//
// T1 Reset → count=0, dig6=0
// T2 Single 1-cycle pulse → dig6 high for exactly 10 cycles, low on 11
// T3 Pulse during stretch → counter reloads to 10 (longer total high time)
// T4 Two pulses spaced > 10 cycles → two clean rising edges
// T5 Pulse asserted continuously for many cycles → counter pinned high
// T6 No pulse activity → dig6 stays low forever
// T7 Reset mid-stretch → counter and dig6 drop immediately
// ============================================================================
`timescale 1ns/1ps
module tb_dig6_frame_pulse;
reg clk_100m = 1'b0;
reg sys_reset_n = 1'b0;
reg frame_pulse = 1'b0;
wire dig6;
frame_pulse_stretcher_block dut (
.clk_100m_buf (clk_100m),
.sys_reset_n (sys_reset_n),
.frame_pulse_in(frame_pulse),
.gpio_dig6 (dig6)
);
// 100 MHz clock (10 ns period)
always #5 clk_100m = ~clk_100m;
integer pass = 0;
integer fail = 0;
task check (input [127:0] label, input expected);
begin
#1;
if (dig6 === expected) begin
$display(" [PASS] %0s: dig6=%b", label, dig6);
pass = pass + 1;
end else begin
$display(" [FAIL] %0s: dig6=%b (exp %b)", label, dig6, expected);
fail = fail + 1;
end
end
endtask
task fire_pulse;
begin
@(posedge clk_100m); #1;
frame_pulse = 1'b1;
@(posedge clk_100m); #1;
frame_pulse = 1'b0;
end
endtask
integer i;
initial begin
$display("============================================================");
$display("PR-AB.b: gpio_dig6 = stretched(frame_pulse)");
$display("============================================================");
// ---- T1: reset state ----
sys_reset_n = 1'b0;
repeat (4) @(posedge clk_100m);
check("T1 reset asserted, dig6 low", 1'b0);
@(posedge clk_100m); #1;
sys_reset_n = 1'b1;
@(posedge clk_100m); #1;
check("T1b after deassert, dig6 still low", 1'b0);
// ---- T2: single pulse exactly 10 cycles high ----
fire_pulse();
// After fire_pulse, frame_pulse was high for 1 clk; the always block
// sampled it on that posedge and loaded count=10. dig6 is high while
// count != 0. Count decrements each cycle: 10,9,...,1,0. So dig6 is
// high for 10 posedges starting on the cycle the load took effect.
for (i = 0; i < 10; i = i + 1) begin
#1;
if (dig6 !== 1'b1) begin
$display(" [FAIL] T2 cycle %0d: dig6=%b (exp 1)", i, dig6);
fail = fail + 1;
end
@(posedge clk_100m);
end
// 11th cycle: count has wrapped to 0, dig6 should be low.
#1;
check("T2 dig6 low on 11th cycle", 1'b0);
// Make sure it stays low.
repeat (5) @(posedge clk_100m);
check("T2 dig6 stays low after stretch", 1'b0);
// ---- T3: pulse during stretch reloads counter ----
fire_pulse();
@(posedge clk_100m); #1; // count = 9
@(posedge clk_100m); #1; // count = 8
@(posedge clk_100m); #1; // count = 7
// Reload by firing another pulse mid-stretch.
@(posedge clk_100m); #1;
frame_pulse = 1'b1;
@(posedge clk_100m); #1;
frame_pulse = 1'b0;
// Counter is now reloaded to 10. dig6 stays high for another 10 cycles.
for (i = 0; i < 10; i = i + 1) begin
#1;
if (dig6 !== 1'b1) begin
$display(" [FAIL] T3 reload cycle %0d: dig6=%b (exp 1)", i, dig6);
fail = fail + 1;
end
@(posedge clk_100m);
end
#1;
check("T3 dig6 low after reloaded stretch", 1'b0);
// ---- T4: spaced pulses produce two distinct rising edges ----
fire_pulse();
repeat (15) @(posedge clk_100m); // > 10 cycles, dig6 must be 0
check("T4a dig6 low between pulses", 1'b0);
fire_pulse();
#1;
check("T4b dig6 high after second pulse", 1'b1);
repeat (10) @(posedge clk_100m);
#1;
check("T4c dig6 low after second stretch", 1'b0);
// ---- T5: continuous pulse pins counter at 10 ----
@(posedge clk_100m); #1;
frame_pulse = 1'b1;
repeat (50) @(posedge clk_100m);
#1;
check("T5 dig6 high under continuous pulse", 1'b1);
@(posedge clk_100m); #1;
frame_pulse = 1'b0;
// After deassert, dig6 should drain over 10 cycles.
repeat (10) @(posedge clk_100m);
#1;
check("T5 dig6 drains after pulse deassert", 1'b0);
// ---- T6: idle line stays low ----
repeat (200) @(posedge clk_100m);
check("T6 dig6 idle stays low", 1'b0);
// ---- T7: reset mid-stretch drops dig6 immediately ----
fire_pulse();
@(posedge clk_100m); #1;
@(posedge clk_100m); #1;
check("T7a dig6 high pre-reset", 1'b1);
sys_reset_n = 1'b0;
@(posedge clk_100m); #1;
check("T7b reset drops dig6", 1'b0);
sys_reset_n = 1'b1;
@(posedge clk_100m); #1;
$display("============================================================");
$display("DIG6 FRAME PULSE RESULTS: pass=%0d fail=%0d", pass, fail);
$display("============================================================");
if (fail == 0) $display("[OVERALL] PASS");
else $display("[OVERALL] FAIL");
$finish;
end
initial begin
#1_000_000;
$display("[FATAL] timeout");
$finish;
end
endmodule
// ============================================================================
// frame_pulse_stretcher_block mirrors the production stretcher in
// radar_system_top.v (PR-AB.b). 1-cycle frame_pulse_in loads count=10;
// counter decrements each clock; gpio_dig6 = (count != 0). reset_n async
// clear. Reloads on subsequent pulses. Result: dig6 high for 10 clk_100m
// cycles = 100 ns starting on the cycle after the input pulse is sampled.
// ============================================================================
module frame_pulse_stretcher_block (
input wire clk_100m_buf,
input wire sys_reset_n,
input wire frame_pulse_in,
output wire gpio_dig6
);
reg [3:0] frame_pulse_stretch_count;
always @(posedge clk_100m_buf or negedge sys_reset_n) begin
if (!sys_reset_n)
frame_pulse_stretch_count <= 4'd0;
else if (frame_pulse_in)
frame_pulse_stretch_count <= 4'd10;
else if (frame_pulse_stretch_count != 4'd0)
frame_pulse_stretch_count <= frame_pulse_stretch_count - 4'd1;
end
assign gpio_dig6 = (frame_pulse_stretch_count != 4'd0);
endmodule
@@ -1,68 +1,35 @@
// ============================================================================
// tb_audit_s10_gpio_split.v
// tb_status_words_stickies.v
//
// AUDIT-S10: gpio_dig5 previously OR'd six unrelated flags — four signal-
// saturation classes (AGC, DDC overflow, DDC saturation, MTI saturation) and
// two control-fault classes (range-decimator watchdog, CIC->FIR CDC overrun)
// into the single MCU-visible bit at PD13. The MCU outer-loop AGC reduces
// RF gain on PD13 assertion, which is the wrong response to a watchdog or
// CDC stall. gpio_dig7 (PD15) was tied 1'b0 (reserved).
// AUDIT-S10 + PR-AB.b: status_words[5][6:5] CDC packing for the two
// control-fault flags (range-decimator watchdog F-6.4, CIC->FIR CDC overrun
// F-1.2) AND the gpio_dig7 fault-OR semantic. PR-AB.b Step 1 made the F-6.4
// half sticky in the source clock domain so a slow host poll cannot miss
// the event; F-1.2 is already sticky inside ddc_400m.v. PR-AB.b drives
// gpio_dig7 = (watchdog | cic_fir_overrun) so the MCU stuck-high sampler
// (main.cpp:880-1000) can fire attemptErrorRecovery(ERROR_FPGA_DSP_STALL).
// status_words[5][7] is reserved (must stay 0).
//
// Fix: split the OR-network so gpio_dig5 carries only signal-saturation flags
// (AGC continues to react correctly) and gpio_dig7 carries control-fault
// flags (MCU follow-up will log + reset; until then host telemetry covers).
// Status words[5][6:5] expose the two control-fault classes so host-side
// can graph them regardless of MCU consumption.
// Replaces the GROUP B tests in the retired tb_audit_s10_gpio_split.v and
// also restores the GROUP A dig7 fault-OR coverage (the dig5 saturation
// portion of GROUP A lives in the radar_receiver_final TBs). gpio_dig6
// stretcher (chirp_scheduler frame_pulse) coverage is in
// tb_dig6_frame_pulse.v.
//
// This TB mirrors the production fragments from radar_system_top.v and
// usb_data_interface[*_ft2232h].v and asserts:
//
// GROUP A GPIO split (combinational)
// T1 All inputs 0 -> dig5=0, dig7=0
// T2 Each signal-sat input -> dig5=1, dig7=0 (no cross-route to dig7)
// T3 Each control-fault -> dig5=0, dig7=1 (no cross-route to dig5)
// T4 Mixed sat + fault -> dig5=1, dig7=1 (independent)
// T5 AGC count >0 (boundary) -> dig5=1
// T6 DDC count =0 (boundary) -> dig5=0
//
// GROUP B Status-word CDC packing (sequential)
// T7 Reset state -> sync regs 0, status_word_bits 0
// T8 Watchdog asserted in src -> after 2 ft_clk edges, status[5]=1
// T9 CIC overrun asserted in src -> after 2 ft_clk edges, status[6]=1
// T10 Both asserted, both cleared -> status[6:5] tracks (sticky in src;
// TB drives explicit clears)
// T11 status_words[5][7] stays 0 (reserved bit, not stomped by sync)
// T12 status_words[5][4:0] (self_test_flags) stays = src input
// T1 Reset state -> sync regs 0, status[6:5]=0, dig7=0
// T2 Watchdog asserted -> after 2 ft_clk edges, status[5]=1, dig7=1
// T3 CIC overrun asserted -> after 2 ft_clk edges, status[6]=1, dig7=1
// T4a Both asserted -> status[6:5]=11, dig7=1
// T4b Both cleared -> status[6:5]=00, dig7=0
// T5 status_words[5][7] stays 0 (reserved bit not stomped by sync); dig7=1
// T6 status_words[5][4:0] (self_test_flags) pass through; dig7=0
// ============================================================================
`timescale 1ns/1ps
module tb_audit_s10_gpio_split;
module tb_status_words_stickies;
// ===== GROUP A: GPIO split inputs/outputs =====
reg [7:0] agc_saturation_count;
reg ddc_overflow_any;
reg [2:0] ddc_saturation_count;
reg [7:0] mti_saturation_count;
reg range_decim_watchdog;
reg ddc_cic_fir_overrun;
wire dig5;
wire dig7;
gpio_split_block gpio_dut (
.agc_saturation_count (agc_saturation_count),
.ddc_overflow_any (ddc_overflow_any),
.ddc_saturation_count (ddc_saturation_count),
.mti_saturation_count (mti_saturation_count),
.range_decim_watchdog (range_decim_watchdog),
.ddc_cic_fir_overrun (ddc_cic_fir_overrun),
.gpio_dig5 (dig5),
.gpio_dig7 (dig7)
);
// ===== GROUP B: status-word CDC packing =====
reg clk_src = 1'b0; // 100 MHz radar domain
reg ft_clk = 1'b0; // 60/100 MHz USB domain
reg ft_clk = 1'b0; // 60 MHz USB domain
reg reset_n = 1'b0;
reg src_watchdog;
reg src_overrun;
@@ -70,6 +37,7 @@ module tb_audit_s10_gpio_split;
reg status_req_pulse;
wire [31:0] status_word_5;
wire gpio_dig7; // PR-AB.b: production OR of fault flags
status_packing_block status_dut (
.clk (clk_src),
@@ -82,29 +50,20 @@ module tb_audit_s10_gpio_split;
.status_word_5 (status_word_5)
);
// 100 MHz src clock
// Mirrors production combinational OR in radar_system_top.v:
// assign gpio_dig7 = rx_range_decim_watchdog | rx_ddc_cic_fir_overrun;
gpio_dig7_or_block dig7_dut (
.watchdog (src_watchdog),
.overrun (src_overrun),
.gpio_dig7(gpio_dig7)
);
always #5 clk_src = ~clk_src;
// 60 MHz ft_clk (~16.67 ns)
always #8 ft_clk = ~ft_clk;
// ----- bookkeeping -----
integer pass = 0;
integer fail = 0;
task check_dig (input [127:0] label, input expected_dig5, input expected_dig7);
begin
#1; // settle combinational
if (dig5 === expected_dig5 && dig7 === expected_dig7) begin
$display(" [PASS] %0s: dig5=%b dig7=%b", label, dig5, dig7);
pass = pass + 1;
end else begin
$display(" [FAIL] %0s: dig5=%b (exp %b) dig7=%b (exp %b)",
label, dig5, expected_dig5, dig7, expected_dig7);
fail = fail + 1;
end
end
endtask
task check_status (input [127:0] label, input [31:0] mask, input [31:0] expected);
begin
if ((status_word_5 & mask) === (expected & mask)) begin
@@ -119,155 +78,117 @@ module tb_audit_s10_gpio_split;
end
endtask
task check_dig7 (input [127:0] label, input expected);
begin
if (gpio_dig7 === expected) begin
$display(" [PASS] %0s: dig7=%b", label, gpio_dig7);
pass = pass + 1;
end else begin
$display(" [FAIL] %0s: dig7=%b (exp %b)", label, gpio_dig7, expected);
fail = fail + 1;
end
end
endtask
task pulse_status_req;
begin
@(posedge ft_clk); #1;
status_req_pulse = 1'b1;
@(posedge ft_clk); #1;
status_req_pulse = 1'b0;
// Allow the registered status_words update to land.
@(posedge ft_clk); #1;
end
endtask
initial begin
$display("============================================================");
$display("AUDIT-S10: gpio_dig split + status_words[5][6:5] visibility");
$display("status_words[5][6:5] CDC + gpio_dig7 fault-OR (AUDIT-S10 + PR-AB.b)");
$display("============================================================");
// ---- GROUP A: GPIO split ----
agc_saturation_count = 8'd0;
ddc_overflow_any = 1'b0;
ddc_saturation_count = 3'd0;
mti_saturation_count = 8'd0;
range_decim_watchdog = 1'b0;
ddc_cic_fir_overrun = 1'b0;
// T1
check_dig("T1 all zero", 1'b0, 1'b0);
// T2 each signal-sat individually
agc_saturation_count = 8'd1;
check_dig("T2a agc_sat>0", 1'b1, 1'b0);
agc_saturation_count = 8'd0;
ddc_overflow_any = 1'b1;
check_dig("T2b ddc_overflow", 1'b1, 1'b0);
ddc_overflow_any = 1'b0;
ddc_saturation_count = 3'd1;
check_dig("T2c ddc_sat>0", 1'b1, 1'b0);
ddc_saturation_count = 3'd0;
mti_saturation_count = 8'd1;
check_dig("T2d mti_sat>0", 1'b1, 1'b0);
mti_saturation_count = 8'd0;
// T3 each control-fault individually
range_decim_watchdog = 1'b1;
check_dig("T3a watchdog", 1'b0, 1'b1);
range_decim_watchdog = 1'b0;
ddc_cic_fir_overrun = 1'b1;
check_dig("T3b cic_fir_overrun", 1'b0, 1'b1);
ddc_cic_fir_overrun = 1'b0;
// T4 mixed
agc_saturation_count = 8'd5;
range_decim_watchdog = 1'b1;
check_dig("T4 mixed sat+fault", 1'b1, 1'b1);
agc_saturation_count = 8'd0;
range_decim_watchdog = 1'b0;
// T5 boundary: largest agc count
agc_saturation_count = 8'hFF;
check_dig("T5 agc_sat=FF", 1'b1, 1'b0);
agc_saturation_count = 8'd0;
// T6 boundary: ddc_sat=0 stays low
ddc_saturation_count = 3'd0;
check_dig("T6 ddc_sat=0", 1'b0, 1'b0);
// ---- GROUP B: status-word CDC packing ----
src_watchdog = 1'b0;
src_overrun = 1'b0;
src_self_test_flags = 5'b00000;
status_req_pulse = 1'b0;
// Apply reset
reset_n = 1'b0;
repeat (5) @(posedge ft_clk);
reset_n = 1'b1;
repeat (3) @(posedge ft_clk);
// T7 reset state
// T1 reset state
pulse_status_req();
check_status("T7 reset state",
check_status("T1 reset state",
32'h000000E0, // [7:5]
32'h00000000);
check_dig7("T1 dig7 idle low", 1'b0);
// T8 watchdog asserted only
// T2 watchdog asserted only
@(posedge clk_src); #1;
src_watchdog = 1'b1;
// give 4 ft_clk for sync chain to settle
repeat (5) @(posedge ft_clk);
pulse_status_req();
check_status("T8 watchdog asserted",
check_status("T2 watchdog asserted",
32'h00000060, // [6:5]
32'h00000020); // [5]=1
check_dig7("T2 dig7 watchdog -> high", 1'b1);
// T9 cic_fir_overrun asserted only (clear watchdog first)
// T3 cic_fir_overrun asserted only (clear watchdog first)
@(posedge clk_src); #1;
src_watchdog = 1'b0;
src_overrun = 1'b1;
repeat (5) @(posedge ft_clk);
pulse_status_req();
check_status("T9 cic_fir_overrun asserted",
check_status("T3 cic_fir_overrun asserted",
32'h00000060,
32'h00000040); // [6]=1
check_dig7("T3 dig7 overrun -> high", 1'b1);
// T10 both, then both cleared
// T4 both, then both cleared
@(posedge clk_src); #1;
src_watchdog = 1'b1;
src_overrun = 1'b1;
repeat (5) @(posedge ft_clk);
pulse_status_req();
check_status("T10a both asserted",
check_status("T4a both asserted",
32'h00000060,
32'h00000060); // [6:5]=11
check_dig7("T4a dig7 both -> high", 1'b1);
@(posedge clk_src); #1;
src_watchdog = 1'b0;
src_overrun = 1'b0;
repeat (5) @(posedge ft_clk);
pulse_status_req();
check_status("T10b both cleared",
check_status("T4b both cleared",
32'h00000060,
32'h00000000);
check_dig7("T4b dig7 both cleared -> low", 1'b0);
// T11 reserved bit [7] stays 0 even when neighbours are 1
// T5 reserved bit [7] stays 0 even when neighbours are 1
@(posedge clk_src); #1;
src_watchdog = 1'b1;
src_overrun = 1'b1;
repeat (5) @(posedge ft_clk);
pulse_status_req();
check_status("T11 [7] reserved stays 0",
32'h00000080, // [7] only
check_status("T5 [7] reserved stays 0",
32'h00000080,
32'h00000000);
check_dig7("T5 dig7 both asserted -> high", 1'b1);
// T12 self_test_flags pass through unchanged
// T6 self_test_flags pass through unchanged
@(posedge clk_src); #1;
src_watchdog = 1'b0;
src_overrun = 1'b0;
src_self_test_flags = 5'b10110;
repeat (5) @(posedge ft_clk);
pulse_status_req();
check_status("T12 self_test_flags untouched",
check_status("T6 self_test_flags untouched",
32'h0000001F,
32'h00000016);
check_dig7("T6 dig7 cleared -> low", 1'b0);
$display("============================================================");
$display("AUDIT-S10 RESULTS: pass=%0d fail=%0d", pass, fail);
$display("STATUS STICKIES + DIG7 OR RESULTS: pass=%0d fail=%0d", pass, fail);
$display("============================================================");
if (fail == 0) $display("[OVERALL] PASS");
else $display("[OVERALL] FAIL");
@@ -282,31 +203,6 @@ module tb_audit_s10_gpio_split;
endmodule
// ============================================================================
// gpio_split_block — mirrors the production fragment from radar_system_top.v
// post AUDIT-S10. Two combinational ORs:
// gpio_dig5 = signal-saturation classes (AGC + DDC + MTI)
// gpio_dig7 = control-fault classes (range-decimator watchdog + CIC->FIR
// CDC overrun)
// ============================================================================
module gpio_split_block (
input wire [7:0] agc_saturation_count,
input wire ddc_overflow_any,
input wire [2:0] ddc_saturation_count,
input wire [7:0] mti_saturation_count,
input wire range_decim_watchdog,
input wire ddc_cic_fir_overrun,
output wire gpio_dig5,
output wire gpio_dig7
);
assign gpio_dig5 = (agc_saturation_count != 8'd0)
| ddc_overflow_any
| (ddc_saturation_count != 3'd0)
| (mti_saturation_count != 8'd0);
assign gpio_dig7 = range_decim_watchdog
| ddc_cic_fir_overrun;
endmodule
// ============================================================================
// status_packing_block — mirrors the production CDC fragment from
// usb_data_interface.v (and usb_data_interface_ft2232h.v) for the AUDIT-S10
@@ -355,3 +251,21 @@ module status_packing_block (
end
end
endmodule
// ============================================================================
// gpio_dig7_or_block — mirrors the production combinational OR in
// radar_system_top.v:
//
// assign gpio_dig7 = rx_range_decim_watchdog | rx_ddc_cic_fir_overrun;
//
// MCU's PD15 stuck-high sampler at main.cpp:880-1000 fires
// attemptErrorRecovery(ERROR_FPGA_DSP_STALL) → bitstream reload on either
// fault class.
// ============================================================================
module gpio_dig7_or_block (
input wire watchdog,
input wire overrun,
output wire gpio_dig7
);
assign gpio_dig7 = watchdog | overrun;
endmodule