PoE上电前先查六组0Ω电阻

"""PD69101 six-strap assembly review, v1.0.0. MIT license.

Python 3.10+, standard library only. Scope: the twelve specified straps.
Does not authorize powering or certify the complete PSE board.
"""
import argparse
import hashlib
import json
from pathlib import Path

PROJECT = "cc856e57f02b4916b03e796c38f60e3b"
# name, U4 pin, project net, low resistor, high resistor, target bit
GROUPS = (
    ("CURRENT_SET", "1", "CUR_SET", "R34", "R37", 0),
    ("AF_AT", "2", "AF_AT", "R38", "R39", 1),
    ("MODE0", "21", "MODE_2", "R40", "R41", 0),
    ("MODE1", "22", "MODE_1", "R42", "R43", 0),
    ("HOST", "23", "H_C", "R44", "R45", 1),
    ("STD_DET", "24", "STD_LEG", "R46", "R47", 1),
)
REFS = tuple(r for *_, lo, hi, bit in GROUPS for r in (lo, hi))
TARGET = {r: (r == (hi if bit else lo))
          for *_, lo, hi, bit in GROUPS for r in (lo, hi)}


def bind(netlist):
    if netlist.get("projectId") != PROJECT:
        raise ValueError("projectId differs; review a new engineering version")
    by_ref = {}
    for c in netlist["components"].values():
        ref = c["props"]["Designator"]
        if ref in by_ref:
            raise ValueError(f"duplicate designator {ref}")
        by_ref[ref] = c
    u4 = by_ref["U4"]
    if u4["props"].get("Manufacturer Part") != "PD69101ILQ-TR":
        raise ValueError("U4 part differs")
    for _, pin, net, lo, hi, _ in GROUPS:
        if u4["pinInfoMap"][pin]["net"] != net:
            raise ValueError(f"U4 pin {pin} differs")
        for ref, rail in ((lo, "GND"), (hi, "DVDD")):
            c = by_ref[ref]
            pins = c["pinInfoMap"]
            nets = {p["net"] for p in pins.values()}
            if len(pins) != 2 or nets != {rail, net}:
                raise ValueError(f"{ref} connectivity differs")
            if c["props"].get("Value", "").strip() not in ("0", "0R", "0Ω"):
                raise ValueError(f"{ref} is not a verified zero-ohm strap")
    return by_ref


def audit(population):
    if set(population) != set(REFS):
        raise ValueError("population must contain exactly the twelve straps")
    if any(type(v) is not bool for v in population.values()):
        raise ValueError("use JSON true/false, not strings or integers")
    errors, bits = [], {}
    for name, _, _, lo, hi, target in GROUPS:
        low, high = population[lo], population[hi]
        if low == high:
            errors.append(f"{name}: {'RAIL_SHORT' if low else 'FLOATING'}")
        else:
            bits[name] = int(high)
            if int(high) != target:
                errors.append(f"{name}: outside AT_LED_HOST_STANDARD policy")
    return {"scope": "six_straps_only", "pass": not errors,
            "bits": bits, "errors": errors}


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("netlist", type=Path)
    group = parser.add_mutually_exclusive_group()
    group.add_argument("--population", type=Path)
    group.add_argument("--literal-bom", action="store_true")
    args = parser.parse_args()
    raw = args.netlist.read_bytes()
    components = bind(json.loads(raw.decode("utf-8-sig")))
    if args.population:
        pop = json.loads(args.population.read_text(encoding="utf-8-sig"))
    elif args.literal_bom:
        pop = {r: components[r]["props"].get("Add into BOM") == "yes"
               for r in REFS}
    else:
        pop = TARGET.copy()
    report = audit(pop)
    report.update(version="1.0.0", netlist_sha256=hashlib.sha256(raw).hexdigest(),
                  fit=[r for r in REFS if pop[r]],
                  dnp=[r for r in REFS if not pop[r]])
    print(json.dumps(report, ensure_ascii=False, indent=2))
    raise SystemExit(0 if report["pass"] else 2)


if __name__ == "__main__":
    main()

python poe_straps.py Netlist_Schematic1_2026-10-24.enet
python poe_straps.py Netlist_Schematic1_2026-10-24.enet --literal-bom

{
  "R34": true,  "R37": false,
  "R38": false, "R39": true,
  "R40": true,  "R41": false,
  "R42": true,  "R43": false,
  "R44": false, "R45": true,
  "R46": false, "R47": true
}