Add

mipi_test_interactive.py

@@ -63,8 +63,9 @@ PROTO_SCALE  = 4e-6     # 4 µs/div → 40 µs window (was 1 µs/div)
 PROTO_POINTS = 500_000
 
 # Pass 3 — LP state capture (single-ended, widens vertical range to show LP-11)
-LP_SCALE      = 500e-9  # 500 ns/div → 5 µs window
+LP_SCALE      = 1e-6    # 1 µs/div → 20 µs actual window (was 500 ns/div)
 LP_POINTS     = 200_000
+LP_TRIG_OFFSET = 9e-6  # shift centre 9 µs after trigger → 1 µs pre / 19 µs post
 LP_V_SCALE    = 0.2     # V/div
 LP_V_OFFSET   = 0.6     # V — centres display between LP-00 (0 V) and LP-11 (1.2 V)
 LP_TRIG_LEVEL = 0.6     # V — catches LP-11 → LP-01 falling edge
@@ -645,6 +646,39 @@ def _fetch_registers(ts: str, iteration: int) -> None:
         print(f"  REGISTERS: SN65DSI83 error — {e}")
         combined["sn65"] = None
 
+    # SN65DSI83 post-restart settling poll
+    try:
+        resp = requests.get(f"{DEVICE_BASE}/sn65_settling", timeout=10)
+        resp.raise_for_status()
+        settling = resp.json()
+        combined["sn65_settling"] = settling
+
+        n     = settling.get("n_readings", 0)
+        n_err = settling.get("n_error", 0)
+        dur   = settling.get("duration_s", 0)
+        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
+                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'}  "
+                      f"clk={'Y' if r['clk_det'] else 'N'}")
+        else:
+            clk_false = sum(1 for r in settling.get("readings", [])
+                            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 ""))
+    except requests.exceptions.RequestException as e:
+        print(f"  REGISTERS: settling poll fetch failed — {e}")
+        combined["sn65_settling"] = None
+    except Exception as e:
+        print(f"  REGISTERS: settling poll error — {e}")
+        combined["sn65_settling"] = None
+
     # Save combined JSON
     try:
         DATA_DIR.mkdir(exist_ok=True)
@@ -673,15 +707,19 @@ def dual_capture(iteration: int) -> str:
     print(f"CAPTURE #{iteration:04d}  [{ts}]")
 
     # ── Pass 1: LP / SoT startup ───────────────────────────────────────────
+    # Trigger position shifted so only 1 µs of LP-11 is pre-trigger; the
+    # remaining 19 µs shows the full HS burst so truncated bursts are visible.
     print("  PASS 1: LP STARTUP TRANSITION...")
     _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"