Updated

device_server.py

@@ -53,10 +53,63 @@ _settling_log:  list = []
 _settling_lock: threading.Lock = threading.Lock()
 
 
+# SN65DSI83 configuration registers to snapshot at start and end of each settling window.
+# Grouped by purpose so a reset-to-default is obvious at a glance.
+# Register address → human-readable name.
+_SN65_SNAPSHOT_REGS: dict[int, str] = {
+    # Core enable / PLL
+    0x09: "CLK_SRC",        # DSI clock source / PLL pre-divider
+    0x0A: "PLL_STATUS",     # PLL_EN_STAT (bit7) + CHA_CLK_DET (bit3)  [status]
+    0x0D: "PLL_EN",         # bit0 = PLL enable; should be 0x01 when running
+    # DSI receiver config
+    0x10: "DSI_LANES",      # CHA_DSI_DATA_EQ_SEL + lane count
+    0x11: "DSI_CLK_RANGE",  # DSI byte-clock frequency range
+    0x12: "LVDS_CLK_RANGE", # LVDS output clock range
+    # Active area
+    0x18: "HACT_LOW",       # CHA active line length, low byte
+    0x19: "HACT_HIGH",      # CHA active line length, high byte
+    0x1A: "VACT_LOW",       # CHA vertical display size, low byte
+    0x1B: "VACT_HIGH",      # CHA vertical display size, high byte
+    # Sync timing
+    0x20: "SYNC_DLY_LOW",   # CHA sync delay, low byte
+    0x21: "SYNC_DLY_HIGH",  # CHA sync delay, high byte
+    0x22: "HSYNC_W_LOW",    # CHA HSYNC pulse width, low byte
+    0x23: "HSYNC_W_HIGH",   # CHA HSYNC pulse width, high byte
+    0x24: "VSYNC_W_LOW",    # CHA VSYNC pulse width, low byte
+    0x25: "VSYNC_W_HIGH",   # CHA VSYNC pulse width, high byte
+    0x26: "HBP",            # CHA horizontal back porch
+    0x28: "VBP",            # CHA vertical back porch
+    0x2A: "HFP",            # CHA horizontal front porch
+    0x2C: "VFP",            # CHA vertical front porch
+    # Format / output
+    0x2D: "TEST_PATTERN",   # bit0 = enable colour bar test pattern
+    0x3C: "LVDS_FORMAT",    # LVDS output format (colour depth, channel swap)
+    # Live LVDS line counter — changes every frame when bridge is actively outputting
+    0xE0: "LINE_CNT_LOW",   # CHA line count, low byte  [live]
+    0xE1: "LINE_CNT_HIGH",  # CHA line count, high byte [live]
+    # Error flags
+    0xE5: "CHA_ERR",        # DSI error flags            [status]
+}
+
+
+def _sn65_snapshot() -> dict:
+    """Read all _SN65_SNAPSHOT_REGS in one pass. Returns {reg_hex: value_hex|None}."""
+    result = {}
+    for reg, name in _SN65_SNAPSHOT_REGS.items():
+        val, _ = _i2c_read_byte(SN65_I2C_BUS, SN65_I2C_ADDR, reg)
+        result[f"0x{reg:02x}"] = {"name": name, "value": f"0x{val:02x}" if val is not None else None}
+    return result
+
+
 def _run_settling_poll() -> None:
-    """Poll SN65DSI83 csr_0a + csr_e5 at 10 ms intervals for 1.5 s after restart."""
+    """Poll SN65DSI83 csr_0a + csr_e5 at ~10 ms intervals for 1.5 s after restart.
+    Also takes a full configuration register snapshot at t=0 and t=end so callers
+    can detect bridge re-initialisation or configuration loss."""
     t_start = time.time()
     t_end   = t_start + SETTLING_DURATION_S
+
+    snapshot_start = _sn65_snapshot()
+
     readings: list = []
     while time.time() < t_end:
         t_ms = round((time.time() - t_start) * 1000, 1)
@@ -71,9 +124,18 @@ def _run_settling_poll() -> None:
             "any_error": bool(val_e5)         if val_e5 is not None else None,
         })
         time.sleep(SETTLING_INTERVAL_S)
+
+    snapshot_end = _sn65_snapshot()
+
     with _settling_lock:
         _settling_log.clear()
         _settling_log.extend(readings)
+        _settling_extra["snapshot_start"] = snapshot_start
+        _settling_extra["snapshot_end"]   = snapshot_end
+
+
+# Stores the two register snapshots from the most recent settling poll.
+_settling_extra: dict = {}
 
 # Known Samsung DSIM register names (base 0x32E10000, i.MX 8M Mini)
 _DSIM_NAMES = {
@@ -220,15 +282,37 @@ def _i2c_read_byte(bus: int, addr: int, reg: int) -> tuple[int | None, str]:
 
 @app.route("/sn65_settling", methods=["GET"])
 def get_sn65_settling():
-    """Return the most recent post-restart settling poll (csr_0a + csr_e5 over 1.5 s)."""
+    """Return the most recent post-restart settling poll.
+
+    Includes:
+      snapshot_start  — full register dump taken immediately before polling begins
+      snapshot_end    — full register dump taken immediately after polling ends
+      readings        — csr_0a + csr_e5 sampled every ~10 ms during the window
+    """
     with _settling_lock:
-        readings = list(_settling_log)
+        readings       = list(_settling_log)
+        snap_start     = dict(_settling_extra.get("snapshot_start") or {})
+        snap_end       = dict(_settling_extra.get("snapshot_end")   or {})
+
     error_readings = [r for r in readings if r.get("any_error")]
+
+    # Diff the two snapshots so the caller can immediately see what changed.
+    changed = {}
+    for reg, info_s in snap_start.items():
+        info_e = snap_end.get(reg, {})
+        v_s = info_s.get("value")
+        v_e = info_e.get("value")
+        if v_s != v_e:
+            changed[reg] = {"name": info_s.get("name"), "start": v_s, "end": v_e}
+
     return jsonify({
         "n_readings":     len(readings),
         "n_error":        len(error_readings),
         "duration_s":     SETTLING_DURATION_S,
         "interval_ms":    int(SETTLING_INTERVAL_S * 1000),
+        "snapshot_start": snap_start,
+        "snapshot_end":   snap_end,
+        "changed_regs":   changed,
         "readings":       readings,
     }), 200
 

mipi_test_interactive.py

@@ -21,7 +21,6 @@ AUTHOR: D. RICE 16/04/2026
 import csv as _csv_mod
 import html
 import json
-import subprocess
 import time
 import sys
 import requests
@@ -38,7 +37,6 @@ import vxi11
 from dotenv import load_dotenv
 
 import ai_mgmt
-import rigol_scope
 from csv_preprocessor import (analyze_lp_file, LPMetrics,
                                HS_BURST_AMPLITUDE_MIN_MV, FLICKER_LP_LOW_MAX_NS)
 
@@ -420,7 +418,6 @@ except Exception as e:
     print(f"ERROR: CANNOT CONNECT TO INSTRUMENTS: {e}")
     sys.exit(1)
 
-rigol_scope.connect()
 
 # ---------------------------------------------------------------------------
 # Scope configuration (identical to mipi_test.py)
@@ -646,7 +643,7 @@ def _fetch_registers(ts: str, iteration: int) -> None:
         print(f"  REGISTERS: SN65DSI83 error — {e}")
         combined["sn65"] = None
 
-    # SN65DSI83 post-restart settling poll
+    # SN65DSI83 post-restart settling poll + register snapshots
     try:
         resp = requests.get(f"{DEVICE_BASE}/sn65_settling", timeout=10)
         resp.raise_for_status()
@@ -656,13 +653,14 @@ def _fetch_registers(ts: str, iteration: int) -> None:
         n     = settling.get("n_readings", 0)
         n_err = settling.get("n_error", 0)
         dur   = settling.get("duration_s", 0)
+
+        # ── csr_e5 error summary ──────────────────────────────────────────
         if n_err:
-            # Print the first and last error readings for quick diagnosis
             err_readings = [r for r in settling.get("readings", []) if r.get("any_error")]
             times = [r["t_ms"] for r in err_readings]
             print(f"  SN65 SETTLING: *** {n_err}/{n} readings had csr_e5 errors "
                   f"over {dur:.1f} s  (t={times[0]:.0f}–{times[-1]:.0f} ms) ***")
-            for r in err_readings[:3]:   # show up to first 3 error readings
+            for r in err_readings[:3]:
                 print(f"    t={r['t_ms']:6.1f} ms  csr_0a={r['csr_0a']}  "
                       f"csr_e5={r['csr_e5']}  "
                       f"pll={'Y' if r['pll_lock'] else 'N'}  "
@@ -672,6 +670,29 @@ def _fetch_registers(ts: str, iteration: int) -> None:
                             if r.get("clk_det") is False)
             print(f"  SN65 SETTLING: no csr_e5 errors in {n} readings over {dur:.1f} s"
                   + (f"  ({clk_false} readings with clk_det=False)" if clk_false else ""))
+
+        # ── Register snapshot: print start values and flag any changes ───
+        snap_start = settling.get("snapshot_start") or {}
+        changed    = settling.get("changed_regs")   or {}
+
+        if snap_start:
+            print(f"  SN65 REGS (t=0):", end="")
+            # Print a compact one-liner of key config registers
+            _key = ["0x0d", "0x10", "0x11", "0x18", "0x19", "0x1a", "0x1b",
+                    "0x3c", "0xe0", "0xe1"]
+            parts = []
+            for r in _key:
+                info = snap_start.get(r, {})
+                parts.append(f"{info.get('name','?')}={info.get('value','?')}")
+            print("  " + "  ".join(parts))
+
+        if changed:
+            print(f"  SN65 REGS CHANGED during settling window ({len(changed)} registers):")
+            for reg, diff in changed.items():
+                print(f"    {reg} {diff['name']:16s}  {diff['start']} → {diff['end']}")
+        elif snap_start:
+            print(f"  SN65 REGS: stable (no register changes between t=0 and t={dur:.1f}s)")
+
     except requests.exceptions.RequestException as e:
         print(f"  REGISTERS: settling poll fetch failed — {e}")
         combined["sn65_settling"] = None
@@ -713,21 +734,11 @@ def dual_capture(iteration: int) -> str:
     _configure_for_lp()
     _set_timebase(LP_SCALE, LP_POINTS)
     scope.write(f":TIMebase:POSition {LP_TRIG_OFFSET:.2E}")
-    if rigol_scope.is_connected():
-        rigol_scope.arm()
     if _arm_and_wait(timeout=30):
         _save_pass_channels("lp", iteration, ts)
     else:
         print("  SKIPPING LP SAVE.")
     scope.write(":TIMebase:POSition 0")   # restore centred for subsequent passes
-    if rigol_scope.is_connected():
-        DATA_DIR.mkdir(exist_ok=True)
-        v18_path = DATA_DIR / f"{ts}_pwr_{iteration:04d}_1v8.csv"
-        n = rigol_scope.read_waveform_csv(v18_path)
-        if n:
-            print(f"  SAVED: {v18_path.name}  ({n} samples)")
-        else:
-            print("  RIGOL CH1: waveform read failed — check connection and probe.")
     _restore_hs_config()
 
     # ── Pass 2: HS signal quality ──────────────────────────────────────────
@@ -997,8 +1008,6 @@ def _lp_followup_capture(iteration: int) -> tuple[str, list[str], list[LPMetrics
         ts_fu = datetime.now().strftime("%Y%m%d_%H%M%S")
         _configure_for_lp()
         _set_timebase(LP_SCALE, LP_POINTS)
-        if rigol_scope.is_connected():
-            rigol_scope.arm()
         if _arm_and_wait(timeout=10):
             _save_pass_channels("lp", iteration, ts_fu)
         else:
@@ -1520,6 +1529,127 @@ def run_interactive_test() -> None:
               f"({len(events)} total suspect(s) assessed)")
 
 
+# ---------------------------------------------------------------------------
+# Continuous capture mode  (periodic flicker — no kiosk restart)
+# ---------------------------------------------------------------------------
+
+def run_continuous_test() -> None:
+    """
+    Continuous LP capture loop — no kiosk restart between iterations.
+
+    Designed for periodic flicker that repeats roughly every second once the
+    display pipeline has started.  The kiosk is started once; the scope
+    re-arms on the NORMAL LP trigger (VBLANK LP-11 → LP-01 falling edge on
+    Ch3) after each capture, effectively sampling one random display frame
+    every ~7 s.
+
+    With flicker on ~1/60 frames the expected time to first catch is
+    ~60 × 7 s ≈ 7 minutes of unattended running.
+
+    When the LP rule-based detector flags a suspect:
+      • The LP file already on disk (10 GSa/s, 100 ps/sample) is decoded
+        directly using single-ended CLK+/DAT0+ thresholds — no extra capture.
+      • proto_decoder checks the HS-SYNC byte position (misalignment) and the
+        Lane 0 pixel content (corruption).
+      • compare_lp_captures() shows byte-level diffs vs the last clean capture.
+
+    Press Ctrl+C to stop.  No report is written (raw LP/proto CSVs are kept).
+    """
+    import proto_decoder as _pd
+
+    print("\n===== CONTINUOUS CAPTURE MODE =====")
+    print("Kiosk starts once.  Scope re-arms on each VBLANK trigger (no restart).")
+    print("LP-only per iteration; LP bit decode fires directly on LP suspect files.")
+    print("Press Ctrl+C to stop.\n")
+
+    _start_video()
+    print("Waiting 5 s for display pipeline to stabilise...")
+    time.sleep(5.0)
+
+    iteration       = 1
+    clean_count     = 0
+    flicker_count   = 0
+    last_clean_iter: int | None = None
+
+    try:
+        while True:
+            ts = datetime.now().strftime("%Y%m%d_%H%M%S")
+
+            # ── LP capture ──────────────────────────────────────────────────
+            _configure_for_lp()
+            _set_timebase(LP_SCALE, LP_POINTS)
+            scope.write(f":TIMebase:POSition {LP_TRIG_OFFSET:.2E}")
+            ok = _arm_and_wait(timeout=5)
+            scope.write(":TIMebase:POSition 0")
+            _restore_hs_config()
+
+            if not ok:
+                print(f"  [{iteration:04d}] LP trigger timeout — retrying")
+                time.sleep(0.5)
+                continue
+
+            _save_pass_channels("lp", iteration, ts)
+
+            # ── Transfer LP files ────────────────────────────────────────────
+            try:
+                ai_mgmt.transfer_csv_files()
+            except Exception as e:
+                print(f"  [{iteration:04d}] transfer error: {e}")
+                iteration += 1
+                continue
+
+            # ── LP analysis (quiet) ──────────────────────────────────────────
+            lp_summaries, suspects = _analyze_lp_files(ts, iteration)
+
+            if not suspects:
+                clean_count    += 1
+                last_clean_iter = iteration
+                print(f"  [{iteration:04d}] clean  "
+                      f"({clean_count} clean  {flicker_count} flicker)")
+                iteration += 1
+                continue
+
+            # ── Flicker detected ─────────────────────────────────────────────
+            flicker_count += 1
+            _play_alarm()
+            print(f"\n[{iteration:04d}] *** FLICKER SUSPECT #{flicker_count} ***")
+            for s in lp_summaries:
+                print(s)
+
+            # ── MIPI bit decode from LP files ────────────────────────────────
+            # LP files are already local (transferred above).  At 10 GSa/s
+            # (100 ps/sample, ~23 samples/bit at 432 Mbps) they have sufficient
+            # resolution to decode the HS bit stream directly using single-ended
+            # CLK+ / DAT0+ thresholds.  No separate proto pass needed.
+            print("\n  --- MIPI BIT DECODE (from LP capture) ---")
+            try:
+                result  = _pd.decode_lp_capture(iteration, DATA_DIR, verbose=True)
+                anomaly = _pd.analyse_for_anomalies(result)
+                if anomaly["anomalous"]:
+                    print(f"\n  *** BIT-LEVEL ANOMALIES: "
+                          f"{', '.join(anomaly['flags'])} ***")
+                else:
+                    print(f"\n  Bit decode: no structural or content anomalies "
+                          f"(sync OK, packet type OK, pixel content OK)")
+
+                if result and last_clean_iter is not None:
+                    print()
+                    _pd.compare_lp_captures(last_clean_iter, iteration, DATA_DIR)
+            except Exception as e:
+                print(f"  bit decode error: {e}")
+
+            print()
+            iteration += 1
+
+    except KeyboardInterrupt:
+        print("\n\nContinuous test stopped (Ctrl+C).")
+
+    _stop_video()
+    total = clean_count + flicker_count
+    print(f"\nSummary: {total} iterations — {clean_count} clean, "
+          f"{flicker_count} flicker suspect(s) caught and decoded.")
+
+
 # ---------------------------------------------------------------------------
 # Menu
 # ---------------------------------------------------------------------------
@@ -1531,23 +1661,18 @@ def main_menu() -> None:
         print("2. SETUP SCOPE (RUN FIRST)")
         print("3. CONFIGURE PSU (DEFAULT 24V / 1.5A)")
         print("4. PSU OUTPUT ON/OFF (CH1)")
-        print("5. START INTERACTIVE FLICKER TEST")
+        print("5. START INTERACTIVE FLICKER TEST  (kiosk restart per iteration)")
-        print("6. EXIT")
+        print("6. START CONTINUOUS CAPTURE TEST   (no restart; LP bit decode on flicker)")
+        print("7. EXIT")
 
-        choice = input("\nSELECT OPTION (1-6): ").strip()
+        choice = input("\nSELECT OPTION (1-7): ").strip()
 
         if choice == '1':
             print(f"PSU  : {psu.ask('*IDN?').strip()}")
             print(f"SCOPE: {scope.ask('*IDN?').strip()}")
-            if rigol_scope.is_connected():
-                print(f"RIGOL: {rigol_scope.rigol.ask('*IDN?').strip()}")
-            else:
-                print("RIGOL: NOT CONNECTED")
 
         elif choice == '2':
             setup_scope()
-            if rigol_scope.is_connected():
-                rigol_scope.configure()
 
         elif choice == '3':
             psu.write('CH1:VOLT 24.0')
@@ -1566,14 +1691,16 @@ def main_menu() -> None:
             run_interactive_test()
 
         elif choice == '6':
+            run_continuous_test()
+
+        elif choice == '7':
             psu.close()
             scope.close()
-            rigol_scope.disconnect()
             print("INSTRUMENTS CLOSED. BYE.")
             break
 
         else:
-            print("INVALID ENTRY. PLEASE CHOOSE 1-6.")
+            print("INVALID ENTRY. PLEASE CHOOSE 1-7.")
 
 
 if __name__ == "__main__":

proto_decoder.py

@@ -50,6 +50,22 @@ HS_SYNC_BYTE = 0xB8   # 1011_1000 in bit order (LSB first → 00011101 on wire)
 # Threshold for differential voltage: >0 = logic-1 (D+ > D-)
 DAT_THRESH_V = 0.0
 
+# Single-ended LP file thresholds (CH1=CLK+, CH3=DAT0+).
+# In HS mode both CLK+ and DAT+ oscillate around the D-PHY common mode (~200 mV).
+LP_SE_CLK_THRESH_V  = 0.20   # CLK+ zero-crossing threshold for edge detection
+LP_SE_DAT_THRESH_V  = 0.20   # DAT+ HS bit threshold (> this = logic 1)
+LP_SE_LP01_THRESH_V = 0.25   # DAT+ < this during LP-01/LP-00 SoT preamble
+
+# Expected Lane 0 payload byte pattern for a static-pink display (R=0xFF G=0x33 B=0xBB).
+# With 4-lane RGB888, Lane 0 carries every 4th byte of the full payload beginning at
+# offset 0.  The 12-byte boundary aligns R/G/B of consecutive pixels so Lane 0 sees:
+#   offset 0  → pixel 0  R = 0xFF
+#   offset 4  → pixel 1  G = 0x33
+#   offset 8  → pixel 2  B = 0xBB
+#   offset 12 → pixel 4  R = 0xFF  (repeats)
+# → 3-byte repeating cycle [0xFF, 0x33, 0xBB] on Lane 0.
+STATIC_PINK_LANE0 = (0xFF, 0x33, 0xBB)
+
 
 # ---------------------------------------------------------------------------
 # I/O
@@ -72,6 +88,18 @@ def find_proto_files(cap_num: int, data_dir: Path):
     return Path(clk_files[-1]), Path(dat_files[-1])
 
 
+def find_lp_files(cap_num: int, data_dir: Path):
+    pattern_clk = str(data_dir / f"*_lp_{cap_num:04d}_clk.csv")
+    pattern_dat = str(data_dir / f"*_lp_{cap_num:04d}_dat.csv")
+    clk_files = sorted(glob.glob(pattern_clk))
+    dat_files = sorted(glob.glob(pattern_dat))
+    if not clk_files:
+        raise FileNotFoundError(f"No LP CLK file found for cap {cap_num:04d} in {data_dir}")
+    if not dat_files:
+        raise FileNotFoundError(f"No LP DAT file found for cap {cap_num:04d} in {data_dir}")
+    return Path(clk_files[-1]), Path(dat_files[-1])
+
+
 # ---------------------------------------------------------------------------
 # Clock edge detection
 # ---------------------------------------------------------------------------
@@ -102,25 +130,44 @@ def find_clock_edges(t_clk, v_clk, threshold=0.0):
 # HS burst detection
 # ---------------------------------------------------------------------------
 
-def find_hs_start(t_dat, v_dat, t_clk=None, window_ns=500.0):
+def find_hs_start(t_dat, v_dat, t_clk=None, window_ns=500.0, single_ended=False):
     """
     Find the start of the post-LP HS burst in the DAT trace.
 
-    For LP-triggered captures (trigger = DAT D+ falling at LP-11→LP-01 transition):
+    single_ended=True  — LP files (CH1=CLK+, CH3=DAT0+): detects LP-01/LP-00
-      - CLK is in continuous HS mode throughout (215 MHz running)
+                         as DAT+ < LP_SE_LP01_THRESH_V for ≥ 20 ns, then returns
-      - DAT shows LP-01 (diff ≈ -1 V) near t=0, preceded by HS data from the
+                         index 50 ns after the plateau ends (HS common-mode rise).
-        previous line and possibly an earlier LP-01 at the start of the capture
+                         Search starts at index 0 — LP-11 pre-trigger (~1.2 V)
-      - LP-00 follows LP-01 briefly (~50-200 ns), then the new HS burst begins
+                         is well above the threshold so no false matches.
-      - To avoid the LP-01 from the previous line (at capture start), search
+    single_ended=False — Proto files (F2=CH3-CH4 differential): LP-01 detected
-        from N//4 onwards — the trigger LP-01 is at the capture midpoint (t=0)
+                         as diff < -0.5 V for ≥ 20 ns, search from N//4.
 
-    Returns index into t_dat just past LP-00, ready for CLK-edge sampling.
+    Returns index into t_dat just past the SoT preamble, ready for CLK-edge sampling.
-    Falls back to original std-based method for HS-triggered captures.
+    Falls back to rolling-std method for HS-triggered captures (differential only).
     """
     dt_ns = float(np.median(np.diff(t_dat))) * 1e9
     N = len(v_dat)
 
-    # --- LP-triggered path ---
+    # --- Single-ended LP path ---
+    if single_ended:
+        min_lp01 = max(2, int(20.0 / dt_ns))
+        run = 0
+        lp01_end = None
+        for i in range(N):
+            if v_dat[i] < LP_SE_LP01_THRESH_V:
+                run += 1
+            else:
+                if run >= min_lp01:
+                    lp01_end = i
+                    break
+                run = 0
+
+        if lp01_end is not None:
+            skip = max(1, int(50.0 / dt_ns))
+            return min(lp01_end + skip, N - 1)
+        return None
+
+    # --- Differential LP-triggered path ---
     # LP-01: D+ = 0 V, D- = high → diff strongly negative (< -0.5 V for ≥ 20 ns)
     LP01_THRESH  = -0.5
     min_lp01     = max(2, int(20.0 / dt_ns))
@@ -138,7 +185,6 @@ def find_hs_start(t_dat, v_dat, t_clk=None, window_ns=500.0):
             run = 0
 
     if lp01_end is not None:
-        # Skip 200 ns past LP-01 end to clear LP-00, then hand off to bit decoder
         skip = max(1, int(200.0 / dt_ns))
         return min(lp01_end + skip, N - 1)
 
@@ -182,17 +228,25 @@ def find_hs_start(t_dat, v_dat, t_clk=None, window_ns=500.0):
 # Bit decoding
 # ---------------------------------------------------------------------------
 
-def decode_bits(t_dat, v_dat, t_clk, v_clk, hs_start_idx):
+def decode_bits(t_dat, v_dat, t_clk, v_clk, hs_start_idx,
+                dat_thresh=None, clk_thresh=None):
     """
     Sample DAT on every CLK edge (DDR) after hs_start_idx.
+
+    dat_thresh: voltage threshold for bit decisions on DAT (default: DAT_THRESH_V).
+    clk_thresh: voltage threshold for CLK edge detection (default: 0.0).
     Returns list of (time_ns, bit) tuples.
     """
+    if dat_thresh is None:
+        dat_thresh = DAT_THRESH_V
+    if clk_thresh is None:
+        clk_thresh = 0.0
+
     t_hs = t_dat[hs_start_idx]
 
-    rising, falling = find_clock_edges(t_clk, v_clk)
+    rising, falling = find_clock_edges(t_clk, v_clk, threshold=clk_thresh)
     all_edges = np.sort(np.concatenate([rising, falling]))
 
-    # Only edges after HS start
     hs_mask   = t_clk[all_edges] >= t_hs
     hs_edges  = all_edges[hs_mask]
 
@@ -204,10 +258,9 @@ def decode_bits(t_dat, v_dat, t_clk, v_clk, hs_start_idx):
     bits = []
     for edge_idx in hs_edges:
         t_edge = t_clk[edge_idx]
-        # Find nearest sample in DAT trace
         dat_idx = int(round((t_edge - t_dat[0]) / (dt_dat * 1e-9)))
         dat_idx = max(0, min(dat_idx, len(v_dat) - 1))
-        bit = 1 if v_dat[dat_idx] > DAT_THRESH_V else 0
+        bit = 1 if v_dat[dat_idx] > dat_thresh else 0
         bits.append((t_edge * 1e9, bit))
 
     return bits
@@ -388,6 +441,18 @@ def decode_capture(cap_num: int, data_dir: Path, verbose: bool = True):
             print(f"\n  First non-zero byte at payload offset {nonzero_idx} (0x{lane0_payload[nonzero_idx]:02X})")
             print(f"  → Corresponds to pixel group ~{nonzero_idx * N_LANES // (BPP // 8)}")
 
+        # Static-pink pixel content check
+        if n_payload >= 12:
+            cc = check_pixel_content(lane0_payload)
+            match_str = (f"{cc['match_pct']:.0f}% of {cc['n_checked']} bytes "
+                         f"match static-pink pattern")
+            if cc["first_mismatch"]:
+                mm = cc["first_mismatch"]
+                match_str += (f"  (first diff at offset {mm[0]}: "
+                              f"got 0x{mm[2]:02X} expected 0x{mm[1]:02X})")
+            print(f"\n  Static-pink check : {match_str}")
+
+    pixel_check = check_pixel_content(lane0_payload) if len(lane0_payload) >= 12 else None
     return {
         "cap_num"         : cap_num,
         "hs_start_ns"     : t_hs_start_ns,
@@ -397,6 +462,135 @@ def decode_capture(cap_num: int, data_dir: Path, verbose: bool = True):
         "sync_idx"        : sync_idx,
         "header"          : header,
         "lane0_payload"   : lane0_payload,
+        "pixel_check"     : pixel_check,
+    }
+
+
+# ---------------------------------------------------------------------------
+# LP single-ended decode
+# ---------------------------------------------------------------------------
+
+def decode_lp_capture(cap_num: int, data_dir: Path, verbose: bool = True):
+    """
+    Full decode of an LP capture (CH1=CLK+, CH3=DAT0+) using single-ended thresholds.
+
+    LP files are captured at 10 GSa/s (100 ps/sample, ~23 samples/bit at 432 Mbps) —
+    sufficient resolution to decode the HS bit stream without a separate proto pass.
+    Returns a dict with the same structure as decode_capture().
+    """
+    clk_path, dat_path = find_lp_files(cap_num, data_dir)
+
+    if verbose:
+        print(f"\n{'='*60}")
+        print(f"Cap {cap_num:04d}: {dat_path.name}  [LP single-ended]")
+        print(f"{'='*60}")
+
+    t_clk, v_clk = load_csv(clk_path)
+    t_dat, v_dat = load_csv(dat_path)
+    dt_ns = float(np.median(np.diff(t_dat))) * 1e9
+
+    if verbose:
+        print(f"  Window: {t_dat[0]*1e6:.2f}..{t_dat[-1]*1e6:.2f} µs  "
+              f"({len(t_dat)} samples, {dt_ns*1000:.0f} ps/sample)")
+
+    hs_start_idx = find_hs_start(t_dat, v_dat, t_clk, single_ended=True)
+    if hs_start_idx is None:
+        if verbose:
+            print("  ERROR: Could not find HS burst start")
+        return None
+
+    t_hs_start_ns = t_dat[hs_start_idx] * 1e9
+    t_hs_end_ns   = t_dat[-1] * 1e9
+    hs_duration_us = (t_hs_end_ns - t_hs_start_ns) / 1000.0
+
+    if verbose:
+        print(f"  HS burst start: {t_hs_start_ns:.0f} ns  "
+              f"({hs_duration_us:.1f} µs available of ~18 µs full burst)")
+
+    bits = decode_bits(t_dat, v_dat, t_clk, v_clk, hs_start_idx,
+                       dat_thresh=LP_SE_DAT_THRESH_V, clk_thresh=LP_SE_CLK_THRESH_V)
+
+    if verbose:
+        print(f"  Decoded {len(bits)} bits  ({len(bits)//8} bytes)")
+
+    if len(bits) < 16:
+        if verbose:
+            print("  ERROR: Too few bits decoded")
+        return None
+
+    raw_bytes = None
+    sync_idx  = None
+    best_phase = 0
+    best_sync  = len(bits)
+    for phase in range(8):
+        rb = bits_to_bytes(bits[phase:])
+        si = find_sync_byte(rb)
+        if si is not None and si < best_sync:
+            best_sync  = si
+            best_phase = phase
+            raw_bytes  = rb
+            sync_idx   = si
+
+    if raw_bytes is None:
+        raw_bytes = bits_to_bytes(bits)
+
+    if sync_idx is None:
+        if verbose:
+            print(f"  WARNING: HS sync byte (0x{HS_SYNC_BYTE:02X}) not found in any bit phase — using raw byte 0")
+        sync_idx = 0
+    else:
+        if verbose:
+            t_sync = raw_bytes[sync_idx][0]
+            print(f"  HS sync byte found at byte {sync_idx} (t={t_sync:.0f} ns, bit phase={best_phase})")
+
+    data_bytes = raw_bytes[sync_idx + 1:]
+    header = parse_long_packet_header([b for _, b in data_bytes[:8]])
+
+    if verbose and header:
+        print(f"\n  DSI Header (lane 0):")
+        print(f"    DI = 0x{header['DI_raw']:02X}  →  VC={header['VC']}  DT=0x{header['DT']:02X}  ({header['DT_name']})")
+
+    lane0_payload = [b for _, b in data_bytes[1:]]
+
+    if verbose:
+        n_payload = len(lane0_payload)
+        n_pixels_partial = n_payload * N_LANES // (BPP // 8)
+        print(f"\n  Lane 0 payload: {n_payload} bytes decoded  (≈ first {n_pixels_partial} pixels' components)")
+
+        if n_payload >= 16:
+            hex_str = " ".join(f"{b:02X}" for b in lane0_payload[:64])
+            print(f"  First 64 payload bytes: {hex_str}")
+            if n_payload > 64:
+                print(f"  ...")
+
+        nonzero_idx = next((i for i, b in enumerate(lane0_payload) if b != 0x00), None)
+        if nonzero_idx is None:
+            print(f"\n  All {n_payload} payload bytes are 0x00 (blank / border region)")
+        else:
+            print(f"\n  First non-zero byte at payload offset {nonzero_idx} (0x{lane0_payload[nonzero_idx]:02X})")
+            print(f"  → Corresponds to pixel group ~{nonzero_idx * N_LANES // (BPP // 8)}")
+
+        if n_payload >= 12:
+            cc = check_pixel_content(lane0_payload)
+            match_str = (f"{cc['match_pct']:.0f}% of {cc['n_checked']} bytes "
+                         f"match static-pink pattern")
+            if cc["first_mismatch"]:
+                mm = cc["first_mismatch"]
+                match_str += (f"  (first diff at offset {mm[0]}: "
+                              f"got 0x{mm[2]:02X} expected 0x{mm[1]:02X})")
+            print(f"\n  Static-pink check : {match_str}")
+
+    pixel_check = check_pixel_content(lane0_payload) if len(lane0_payload) >= 12 else None
+    return {
+        "cap_num"         : cap_num,
+        "hs_start_ns"     : t_hs_start_ns,
+        "hs_duration_us"  : hs_duration_us,
+        "n_bits"          : len(bits),
+        "n_bytes"         : len(raw_bytes),
+        "sync_idx"        : sync_idx,
+        "header"          : header,
+        "lane0_payload"   : lane0_payload,
+        "pixel_check"     : pixel_check,
     }
 
 
@@ -450,32 +644,175 @@ def compare_captures(cap_a: int, cap_b: int, data_dir: Path, n_bytes: int = 128)
             print(f"\n  Cross-correlation peak at lag={lag} bytes (0 = no shift)")
 
 
+def compare_lp_captures(cap_a: int, cap_b: int, data_dir: Path, n_bytes: int = 128):
+    """
+    Decode both LP captures and report byte-level differences in the first n_bytes.
+    """
+    print(f"\nComparing LP cap {cap_a:04d} vs cap {cap_b:04d} (first {n_bytes} payload bytes on lane 0)")
+
+    res_a = decode_lp_capture(cap_a, data_dir, verbose=False)
+    res_b = decode_lp_capture(cap_b, data_dir, verbose=False)
+
+    if res_a is None or res_b is None:
+        print("  ERROR: Could not decode one or both LP captures")
+        return
+
+    pa = res_a["lane0_payload"][:n_bytes]
+    pb = res_b["lane0_payload"][:n_bytes]
+
+    n_compare = min(len(pa), len(pb), n_bytes)
+    diffs = [(i, pa[i], pb[i]) for i in range(n_compare) if pa[i] != pb[i]]
+
+    print(f"  Cap {cap_a:04d}: {len(pa)} bytes available,  DI=0x{res_a['header']['DI_raw']:02X}  HS_start={res_a['hs_start_ns']:.0f}ns")
+    print(f"  Cap {cap_b:04d}: {len(pb)} bytes available,  DI=0x{res_b['header']['DI_raw']:02X}  HS_start={res_b['hs_start_ns']:.0f}ns")
+
+    if not diffs:
+        print(f"\n  No differences in first {n_compare} bytes — data content matches.")
+    else:
+        print(f"\n  {len(diffs)} byte differences in first {n_compare} bytes:")
+        print(f"  {'Offset':>8}  {'Cap_A':>6}  {'Cap_B':>6}")
+        for offset, ba, bb in diffs[:40]:
+            pixel_group = offset * N_LANES // (BPP // 8)
+            print(f"  {offset:>8}  0x{ba:02X}     0x{bb:02X}     (pixel group ≈ {pixel_group})")
+        if len(diffs) > 40:
+            print(f"  ... ({len(diffs) - 40} more)")
+
+    if len(pa) > 8 and len(pb) > 8:
+        pa_arr = np.array(pa[:n_compare], dtype=np.uint8)
+        pb_arr = np.array(pb[:n_compare], dtype=np.uint8)
+        xcorr = np.correlate(pa_arr.astype(float) - pa_arr.mean(),
+                              pb_arr.astype(float) - pb_arr.mean(), mode="full")
+        lag = int(np.argmax(np.abs(xcorr))) - (n_compare - 1)
+        if lag != 0 and abs(lag) < n_compare // 2:
+            print(f"\n  Cross-correlation peak at lag={lag} bytes → data may be shifted by {lag} bytes between captures")
+        else:
+            print(f"\n  Cross-correlation peak at lag={lag} bytes (0 = no shift)")
+
+
+# ---------------------------------------------------------------------------
+# Pixel content verification and anomaly analysis
+# ---------------------------------------------------------------------------
+
+def check_pixel_content(lane0_payload: list, n_check: int = 60) -> dict:
+    """
+    Verify the first n_check Lane 0 payload bytes against the expected static-pink
+    pattern STATIC_PINK_LANE0.  Returns a dict:
+      match_pct      — percentage of bytes matching expected pattern
+      n_mismatches   — number of mismatching bytes in the checked window
+      first_mismatch — (offset, expected_byte, actual_byte) or None
+      n_checked      — number of bytes examined
+    """
+    check = lane0_payload[:n_check]
+    if not check:
+        return {"match_pct": None, "n_mismatches": 0,
+                "first_mismatch": None, "n_checked": 0}
+    mismatches = [
+        (i, STATIC_PINK_LANE0[i % 3], actual)
+        for i, actual in enumerate(check)
+        if actual != STATIC_PINK_LANE0[i % 3]
+    ]
+    return {
+        "match_pct":      round((1 - len(mismatches) / len(check)) * 100, 1),
+        "n_mismatches":   len(mismatches),
+        "first_mismatch": mismatches[0] if mismatches else None,
+        "n_checked":      len(check),
+    }
+
+
+def analyse_for_anomalies(result: dict | None) -> dict:
+    """
+    Summarise bit-level anomalies from a decode_capture() result.
+    Returns {"anomalous": bool, "flags": list[str]}.
+
+    Checks:
+      sync_byte_not_found   — 0xB8 not found in any of 8 bit phases →
+                              HS burst may not have started properly
+      sync_byte_late        — 0xB8 found but at byte index > 5 →
+                              garbage precedes sync → possible byte misalignment
+      unexpected_packet_type — DI data-type not in the expected set
+      pixel_content_mismatch — Lane 0 payload < 90 % match to static-pink pattern
+    """
+    if result is None:
+        return {"anomalous": True, "flags": ["decode_failed"]}
+
+    flags = []
+
+    sync_idx = result.get("sync_idx")
+    if sync_idx is None:
+        flags.append("sync_byte_not_found — HS burst may not have started")
+    elif sync_idx > 5:
+        flags.append(
+            f"sync_byte_late (found at byte {sync_idx}, expected ≤ 5) — "
+            f"possible byte misalignment"
+        )
+
+    header = result.get("header")
+    if header:
+        dt = header.get("DT", -1)
+        known = {DSI_DT_RGB888, 0x39, DSI_DT_HSYNC, DSI_DT_VSYNC,
+                 0x31, 0x11, 0x29, 0x08, 0x09, 0x19}
+        if dt not in known:
+            flags.append(f"unexpected_packet_type DT=0x{dt:02X}")
+
+    payload = result.get("lane0_payload", [])
+    if len(payload) >= 12:
+        cc = check_pixel_content(payload)
+        if cc["match_pct"] is not None and cc["match_pct"] < 90.0:
+            mm = cc["first_mismatch"]
+            detail = (
+                f"first diff at byte {mm[0]}: got 0x{mm[2]:02X} expected 0x{mm[1]:02X}"
+                if mm else ""
+            )
+            flags.append(
+                f"pixel_content_mismatch "
+                f"({cc['match_pct']:.0f}% of {cc['n_checked']} bytes match; {detail})"
+            )
+
+    return {"anomalous": bool(flags), "flags": flags}
+
+
 # ---------------------------------------------------------------------------
 # CLI
 # ---------------------------------------------------------------------------
 
 def main():
-    parser = argparse.ArgumentParser(description="Decode DSI packet content from proto captures")
+    parser = argparse.ArgumentParser(description="Decode DSI packet content from proto or LP captures")
     parser.add_argument("--cap"    , type=int, default=214, help="Capture number to decode (default: 214)")
     parser.add_argument("--dir"    , type=str, default=str(DATA_DIR), help="Data directory")
     parser.add_argument("--compare", type=int, default=None,
                         metavar="CAP_B",
                         help="Compare --cap against CAP_B byte-by-byte")
-    parser.add_argument("--list"   , action="store_true", help="List available proto captures")
+    parser.add_argument("--lp"     , action="store_true",
+                        help="Decode from LP single-ended files instead of proto differential files")
+    parser.add_argument("--list"   , action="store_true", help="List available captures")
     args = parser.parse_args()
 
     data_dir = Path(args.dir)
 
     if args.list:
-        files = sorted(data_dir.glob("*_proto_*_dat.csv"))
+        proto_files = sorted(data_dir.glob("*_proto_*_dat.csv"))
-        caps  = sorted({int(f.stem.split("_")[-2]) for f in files})
+        proto_caps  = sorted({int(f.stem.split("_")[-2]) for f in proto_files})
-        print(f"Available proto captures: {caps}")
+        lp_files    = sorted(data_dir.glob("*_lp_*_dat.csv"))
+        lp_caps     = sorted({int(f.stem.split("_")[-2]) for f in lp_files})
+        print(f"Available proto captures: {proto_caps}")
+        print(f"Available LP captures:    {lp_caps}")
         return
 
     if args.compare is not None:
-        compare_captures(args.cap, args.compare, data_dir)
+        if args.lp:
+            compare_lp_captures(args.cap, args.compare, data_dir)
+        else:
+            compare_captures(args.cap, args.compare, data_dir)
     else:
-        decode_capture(args.cap, data_dir, verbose=True)
+        if args.lp:
+            result = decode_lp_capture(args.cap, data_dir, verbose=True)
+        else:
+            result = decode_capture(args.cap, data_dir, verbose=True)
+        anomaly = analyse_for_anomalies(result)
+        if anomaly["anomalous"]:
+            print(f"\n*** BIT-LEVEL ANOMALIES: {', '.join(anomaly['flags'])} ***")
+        else:
+            print(f"\nNo bit-level anomalies detected (sync, packet type, pixel content all OK)")
 
 
 if __name__ == "__main__":