kicad：EasyEDA→KiCad 工程（Board1/Board2）、库、脚本与评审文档（IC 引脚、风扇、热、EDL 供电、布局规则）

Co-Authored-By: Claude Opus 5.5 <[email protected]>

kicad/scripts/kelvin_checks.py

@@ -0,0 +1,68 @@
+"""Check registered sense copper against native physical connectivity."""
+import pcbnew as pcb
+
+
+def check_measurement_branches(board, branches):
+    if not branches:
+        return {'branches': [], 'errors': []}
+    board.BuildConnectivity()
+    connection = board.GetConnectivity()
+    tracks = {t.m_Uuid.AsString(): t for t in board.GetTracks()}
+    pads = {(f.GetReference(), p.GetNumber()): p for f in board.GetFootprints() for p in f.Pads()}
+    results, errors = [], []
+    for branch in branches:
+        name = branch['connection']
+        ids = set(branch['track_uuids'])
+        source_key, target_key = tuple(branch['from']), tuple(branch['to'])
+        source, target = pads.get(source_key), pads.get(target_key)
+        issues = []
+        if source is None or target is None or not ids <= tracks.keys():
+            errors.append({'kind': 'kelvin_missing_items', 'connection': name})
+            continue
+        if source.GetNetname() != target.GetNetname() or source.GetNetname() != branch['net']:
+            issues.append('net_changed')
+        if source_key[1] not in ('9', '10') or not target_key[0].startswith('Rs'):
+            issues.append('unexpected_measurement_endpoints')
+        seen = set()
+        pending = {t.m_Uuid.AsString() for t in connection.GetConnectedTracks(source)} & ids
+        while pending:
+            uid = pending.pop()
+            if uid in seen:
+                continue
+            seen.add(uid)
+            pending.update({t.m_Uuid.AsString() for t in connection.GetConnectedTracks(tracks[uid])} & ids - seen)
+        if seen != ids:
+            issues.append('disconnected_registered_segments')
+        touched = set()
+        external = set()
+        for uid in ids:
+            track = tracks[uid]
+            if isinstance(track, pcb.PCB_VIA) or track.GetLayer() != pcb.F_Cu:
+                issues.append('measurement_changed_layer')
+            if track.GetWidth() != pcb.FromMM(branch['width_mm']) or track.GetNetname() != branch['net']:
+                issues.append('measurement_geometry_or_net_changed')
+            touched.update((p.GetParentFootprint().GetReference(), p.GetNumber()) for p in connection.GetConnectedPads(track))
+            for other in connection.GetConnectedTracks(track):
+                other_id = other.m_Uuid.AsString()
+                if other_id in ids:
+                    continue
+                # Future load copper may join at the shunt land, never on the sense run.
+                shared = [q for q in (track.GetStart(), track.GetEnd())
+                          if q == other.GetStart() or q == other.GetEnd()]
+                if not shared or not all(target.HitTest(q) for q in shared):
+                    external.add(other_id)
+        if touched != {source_key, target_key}:
+            issues.append('unexpected_or_missing_pad_contact')
+        if external:
+            issues.append('branch_join_outside_shunt_land')
+        length = sum(pcb.ToMM(tracks[uid].GetLength()) for uid in ids)
+        if abs(length - branch['length_mm']) > .001:
+            issues.append('measurement_length_changed_requires_review')
+        result = {'connection': name, 'from': source_key, 'to': target_key,
+                  'physically_touched_pads': sorted(touched), 'length_mm': round(length, 5),
+                  'external_track_joins': sorted(external), 'passed': not issues}
+        results.append(result)
+        if issues:
+            errors.append({'kind': 'kelvin_branch', 'connection': name, 'issues': sorted(set(issues))})
+    return {'branches': results, 'errors': errors,
+            'limits': 'Zones and final shunt load-current entry geometry require review after power copper is added'}