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Check ImpedenceFinder against datasheet SI rules, not a dump table.

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Each layout_rules SI requirement (diff/SE Z, skew, max length, spacing,
ref plane, vias, layer, return, series R) is one PASS/FAIL/MARGIN finding
with FACT and REQUIREMENT. USB/HDMI/PCIe/ETH/LVDS/DDR only; I2C GPIO CC
and analog REGN are skipped. No invented 90 Ω.
This commit is contained in:
michele
2026-09-20 10:45:27 +02:00
parent 187605763d
commit 65a91419a2
14 changed files with 956 additions and 67 deletions
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backend/services/extraction.py
+25 -1
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@@ -137,9 +137,13 @@ PINTABLE_TOOL = {
"type": "array",
"description": (
"PCB layout constraints from typical-application / PCB layout pages. "
"kind: decoupling_proximity | thermal_via | keepout | length_match. "
"kind: decoupling_proximity | thermal_via | keepout | length_match | "
"impedance | max_length | spacing | ref_plane | si_via | layer | "
"series_resistor | return_path | si. "
"Fields: pin, cap_value_hint, max_distance_mm (ONLY if the PDF states a "
"number — never invent 3 mm/JEDEC), same_layer (bool), min_via_count, "
"max_via_count, z0_ohm, zdiff_ohm, tolerance_pct, z_min_ohm, z_max_ohm, "
"topology, min_spacing_mm, value_ohms, ref_plane, parameter, "
"net_class, note, source_page. Empty array if the PDF has no layout guidance."
),
"items": {
@@ -152,6 +156,15 @@ PINTABLE_TOOL = {
"thermal_via",
"keepout",
"length_match",
"impedance",
"max_length",
"spacing",
"ref_plane",
"si_via",
"layer",
"series_resistor",
"return_path",
"si",
],
},
"pin": {"type": ["string", "null"]},
@@ -159,9 +172,20 @@ PINTABLE_TOOL = {
"max_distance_mm": {"type": ["number", "null"]},
"same_layer": {"type": ["boolean", "null"]},
"min_via_count": {"type": ["integer", "null"]},
"max_via_count": {"type": ["integer", "null"]},
"net_class": {"type": ["string", "null"]},
"note": {"type": ["string", "null"]},
"source_page": {"type": ["integer", "null"]},
"z0_ohm": {"type": ["number", "null"]},
"zdiff_ohm": {"type": ["number", "null"]},
"tolerance_pct": {"type": ["number", "null"]},
"z_min_ohm": {"type": ["number", "null"]},
"z_max_ohm": {"type": ["number", "null"]},
"topology": {"type": ["string", "null"]},
"min_spacing_mm": {"type": ["number", "null"]},
"value_ohms": {"type": ["number", "null"]},
"ref_plane": {"type": ["string", "null"]},
"parameter": {"type": ["string", "null"]},
},
"required": ["kind"],
},