0dc9daf54f
- gen_bom.py + BOM_board.csv: authoritative BOM generated from board.net (70 line items, 167 placements), grouped with MPNs; refs match the integrated netlist; DNP ICs flagged. (Supersedes the early hand-written BOM.csv, which used per-block refs.) - LAYOUT.md: routing rulebook for board.net -- 4-layer stackup, the grounding/star-point strategy, switcher loop isolation, analog separation, USB diff pair, RP2350/crystal/flash, thermal, DNP blocks, pre-fab confirm list, DRC checklist. - pcb_layout_tutorial.md: beginner orientation -- use KiCad; the schematic/netlist=contract vs layout=physical-realization paradigm; the import->place->route->pour->DRC->Gerber workflow; vocabulary; how our files fit; learning resources; honest expectations. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
76 lines
3.9 KiB
Python
76 lines
3.9 KiB
Python
#!/usr/bin/env python3
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"""Generate a consolidated BOM from the integrated board.net.
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Run INSIDE the EDA container:
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cd hardware/eda && ./run.sh python3 ../eda/gen_bom.py
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Reads hardware/kicad/board.net, groups like parts, attaches MPNs, writes
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hardware/BOM_board.csv (authoritative part list keyed to the board.net references).
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"""
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import re, csv, os, collections
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ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", ".."))
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NET = os.path.join(ROOT, "hardware/kicad/board.net")
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OUT = os.path.join(ROOT, "hardware/BOM_board.csv")
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# value -> (manufacturer, MPN, note)
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MPN = {
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"RP2350A": ("Raspberry Pi", "RP2350A", "MCU (QFN-60); via KiCad lib symbol"),
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"W25Q128JVS": ("Winbond", "W25Q128JVSIQ", "16MB QSPI flash"),
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"PCM5102A": ("TI", "PCM5102APWR", "I2S DAC; SCK->GND (MCLK-less)"),
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"THAT1240": ("THAT Corp", "THAT1240S08-U", "0dB balanced line receiver; 2nd-src INA134/SSM2141"),
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"THAT1646": ("THAT Corp", "THAT1646S08-U", "balanced line driver, +6dB; 2nd-src DRV134/SSM2142"),
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"OPA1641": ("TI", "OPA1641AID", "JFET Hi-Z DI buffer"),
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"OPA1612": ("TI", "OPA1612AIDR", "dual: recon filter + summer"),
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"TPS65131": ("TI", "TPS65131RGER", "dual boost/inverter -> +/-18V"),
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"TPS7A4901": ("TI", "TPS7A4901DGNR", "+15V ultra-low-noise LDO; confirm Vfb"),
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"TPS7A3001": ("TI", "TPS7A3001DGNR", "-15V ultra-low-noise LDO; confirm Vfb"),
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"AP2112K-3.3": ("Diodes", "AP2112K-3.3TRG1", "3V3 LDO; confirm SOT-23-5 pinout"),
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"ULN2003A": ("TI", "ULN2003ADR", "shared relay driver (3 of 7 ch used)"),
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"RV-8803-C7": ("Micro Crystal", "RV-8803-C7", "I2C RTC; confirm footprint"),
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"LM393": ("TI", "LM393DR", "DNP - SIG/CLIP comparator"),
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"H11L1": ("Vishay", "H11L1M", "DNP - MIDI opto IN; confirm pinout"),
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"74LVC14": ("Nexperia", "74LVC14APW", "DNP - MIDI OUT/THRU buffer"),
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"PAM8302A": ("Diodes", "PAM8302AASCR", "DNP - monitor speaker amp"),
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"USBLC6-2SC6": ("STMicro", "USBLC6-2SC6", "USB ESD"),
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"TQ2SA-5V": ("Panasonic", "TQ2SA-5V", "DPDT signal relay, gold; K1 select/K2 mute/K3 gnd-lift"),
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"12MHz": ("Abracon", "ABM8-272-12.000MHZ-T3", "RP2350 crystal; confirm load caps"),
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"USB_C_Receptacle": ("GCT", "USB4085-GF-A", "USB-C; 24-pin sym vs 16-pin part - resolve at layout"),
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"CR2032": ("Keystone", "1066", "coin-cell holder (RTC backup)"),
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"MBRM120": ("onsemi", "MBRM120ET3G", "Schottky rectifier (switcher)"),
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"BAT54": ("onsemi", "BAT54", "Schottky (RTC diode-OR / peak-detect)"),
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"1N4148WS": ("onsemi", "1N4148WS", "fast diode (input clamps / MIDI protect)"),
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"4.7uH": ("Wurth/EPCOS", "7447789004 / B82462-G4472", "switcher inductor"),
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"3.3uH": ("Abracon", "AOTA-B201610S3R3-101-T", "RP2350 core SMPS inductor"),
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"600R": ("Murata", "BLM18KG..", "ferrite bead (USB VBUS input)"),
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}
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comps = re.findall(r'\(comp\s*\(ref "([^"]+)"\)\s*\(value "([^"]+)"\)(.*?)\(libsource', open(NET).read(), re.S)
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def fp(blk):
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m = re.search(r'\(footprint "([^"]+)"', blk); return m.group(1) if m else ""
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groups = collections.OrderedDict()
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for ref, val, blk in comps:
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key = (val, fp(blk))
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groups.setdefault(key, []).append(ref)
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def sortkey(r):
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m = re.match(r'([A-Za-z]+)(\d+)', r); return (m.group(1), int(m.group(2))) if m else (r, 0)
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rows = []
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for (val, foot), refs in groups.items():
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refs = sorted(refs, key=sortkey)
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man, mpn, note = MPN.get(val, ("", "", ""))
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if "Potentiometer" in foot: # the level-cal trimmer (value "10k" but a pot)
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man, mpn, note = ("Bourns", "3296W-1-103LF", "output level cal trim (25-turn)")
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# heuristic DNP flag
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dnp = any(s in note for s in ("DNP",))
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rows.append([len(refs), " ".join(refs), val, foot, man, mpn, ("DNP" if dnp else ""), note])
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rows.sort(key=lambda r: (r[6] == "DNP", -r[0], r[2])) # populated first, then by qty
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with open(OUT, "w", newline="") as f:
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w = csv.writer(f)
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w.writerow(["Qty", "Refs", "Value", "Footprint", "Manufacturer", "MPN", "Populate", "Notes"])
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w.writerows(rows)
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print("wrote", OUT)
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print("line items:", len(rows), " total placements:", sum(r[0] for r in rows))
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