kicad/scripting/plugins/BomGeneration/jlcparts.py

import argparse
import pandas as pd
import logging

logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

parser = argparse.ArgumentParser()
parser.add_argument("input", nargs="?", default=None)
args = parser.parse_args()


def mlcc_code2specs(code):
    specs = {}
    code = code.lower()
    if code in ["c0g", "np0"]:
        # type 1
        specs["temperature_min"] = -55
        specs["temperature_max"] = +125
        specs["tolerance"] = 0
    else:
        # type 2
        specs["temperature_min"] = {
            "x": -55,
            "y": -30,
            "z": +10,
        }[code[0]]
        specs["temperature_max"] = {
            2: +45,
            4: +65,
            5: +85,
            6: +105,
            7: +125,
        }[int(code[1])]
        specs["tolerance"] = {
            "d": 0.033,
            "e": 0.047,
            "f": 0.075,
            "p": 0.10,
            "r": 0.15,
            "s": 0.22,
            "t": 0.33,
            "u": 0.56,
            "v": 0.82,
        }[code[2]]


footprints = {
    "0402": (2, ["0402", "R0402", "C0402"]),
    "0603": (2, ["0603", "R0603", "C0603"]),
    "0805": (2, ["0805", "R0805", "C0805"]),
    "1206": (2, ["1206", "R1206", "C1206"]),
    "1210": (2, ["1210", "R1210", "C1210"]),
    "1218": (2, ["1218", "R1218", "C1218"]),
    "2512": (2, ["2512", "R2512", "C2512"]),
}


# TODO: remove hardcoded csv
args.input = "/home/brendan/Documents/tempsync/projects/0034_UniversalController/jlcparts.csv"
if args.input:
    parts_csv = pd.read_csv(args.input, encoding_errors="replace", delimiter=",", index_col=False)
else:
    raise NotImplementedError()

logger.info("Parsing JLCPCB stock...")

stock = parts_csv[parts_csv["Stock"] > 0]

# NOTES:
# if something has tolerance specified as absolute,
# "Value" may be wrong but "Tolerance" will be NA so it will be dropped

# resistors
resistors = stock[stock["First Category"] == "Resistors"].copy()
resistors["Value"] = resistors["Description"].str.extract(r"(\d+(\.\d+)?)<29><>").astype(float).iloc[:, 0]
resistors["Tolerance"] = resistors["Description"].str.extract(r"(\d+)%").astype(float) / 100
resistors["TempCoef"] = resistors["Description"].str.extract(r"(\d+)ppm/<2F><>").astype(float) / 1e6
power_frac = resistors["Description"].str.extract(r"(\d+)/(\d+)W").astype(float)
power_frac = power_frac.iloc[:, 0] / power_frac.iloc[:, 1]
power_dec = resistors["Description"].str.extract(r"(\d+(\.\d+))W").astype(float).iloc[:, 0]
power = power_frac.add(power_dec, fill_value=0)
power[power_frac.notnull() & power_dec.notnull()] = pd.NA
resistors["Power"] = power
resistors["Footprint"] = pd.NA
for fp, (pins, names) in footprints.items():
    matches = False
    for name in names:
        matches = matches | (resistors["Package"] == name)
    matches = matches & (resistors["Solder Joint"] == pins)
    resistors.loc[matches, "Footprint"] = fp
# resistors.drop("Package", inplace=True)
resistors.dropna(inplace=True)

print(len(resistors))

# capacitors
capacitors = stock[stock["First Category"] == "Capacitors"].copy()
value = capacitors["Description"].str.extract(r"(\d+(\.\d+)?)([pnum]?)F")
value = value.iloc[:, 0].astype(float) * value.iloc[:, 2].replace(
    ["p", "n", "u", "m", ""], [1e-12, 1e-9, 1e-6, 1e-3, 1]
).astype(float)
capacitors["Value"] = value
capacitors["Tolerance"] = capacitors["Description"].str.extract(r"(\d+)%").astype(float) / 100
capacitors["Voltage"] = capacitors["Description"].str.extract(r"(\d+(\.\d+)?)V").astype(float).iloc[:, 0]
# TODO: "MLCC"/"Tantalum"
code_np0 = capacitors["Description"].str.contains(r"NP0")
code_t1 = capacitors["Description"].str.extract(r"([CBLAMPRSTVU][01234678][GHJKLMN])")
code_t2 = capacitors["Description"].str.extract(r"([XYZ][24567][DEFPRSTUV])")
code = code_t1
code[code_t2.notnull()] = code_t2
code[code_np0] = "C0G"
capacitors["Code"] = code
capacitors["Footprint"] = pd.NA
for fp, (pins, name) in footprints.items():
    matches = False
    for n in name:
        matches = matches | (capacitors["Package"] == n)
    matches = matches & (capacitors["Solder Joint"] == pins)
    capacitors.loc[matches, "Footprint"] = fp
# capacitors.drop("Package", inplace=True)
capacitors.dropna(inplace=True)

print(len(capacitors))
pass