Knowit e61404478e tools/epro2/kicad: Phase-1 .kicad_pcb exporter — 6/6 boards open in KiCad 8 ...

Phase-1 scope: produce a .kicad_pcb that kicad-cli loads cleanly and
that has the right geometry (nets, footprints, tracks, vias, board
outline) — not a 1:1 EDA round-trip. Skipped on purpose for Phase 2:
copper pours (POUR/POURED), manual FILL, teardrops, board-level
strings/images, ARC circle-center recovery.

What lands:
  - pcb_writer.write_pcb(): header/general, data-driven layer table
    (F.Cu = ord 0; B.Cu = ord 31; SIGNAL inner ids 15+ allocated to
    In1.Cu/In2.Cu/... in EPRO2-id sorted order so used inner layers
    stay contiguous), net-name → integer id map (id 0 reserved for the
    empty net per KiCad convention), LINE→segment / LINE→gr_line on
    Edge.Cuts, layer-11 POLY paths walked into Edge.Cuts gr_line chains
    (the actual board outline lives on POLY here, not LINE — without
    this stats showed edge=0), VIA→via.
  - footprint_writer.write_footprint_placement(): inline (footprint ...)
    blocks per PCB COMPONENT. EPRO2 RECT/ELLIPSE/OVAL/POLYGON pad
    shapes mapped to KiCad rect/circle/oval/custom; SMD vs THT detected
    by PAD.hole presence; SLOT holes use (drill oval w h). Pad nets
    resolved cross-doc via the existing PCB.PAD_NET → footprint.pad
    chain in ProjectRelations. layerId=2 component → (layer B.Cu) +
    text on B.SilkS so bottom-side parts render correctly.

Smoke test on ESP-VoCat (6 PCBs): all 6 pass `kicad-cli pcb export svg`
and render. DRC on smallest (MicBoard) reports 145 violations + 75
unconnected — most of the unconnected are GND nets that the EPRO2
source resolves through POUR copper, which Phase 2 will export.

CLI: `python -m tools.epro2.kicad <project> --all-pcb --out <dir>`
emits one .kicad_pcb per PCB doc.

52 → 65 unit tests pass. Float comparisons in tests use math.isclose
because the s-expr 6-decimal trim doesn't preserve strict equality
through `value * MIL_TO_MM` round-trips.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-04-29 00:18:32 +08:00

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