47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
#!/usr/bin/env python3
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import re
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import math
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import gerbonara.cad.kicad.pcb as pcb
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r = 85
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cx, cy = 150, 100
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si_prefixes = {'k': 1e3, 'M': 1e6, 'G': 1e9, 'm': 1e-3, 'u': 1e-6, 'µ': 1e-6, 'n': 1e-9, 'p': 1e-12, '.': 1, 'r': 1}
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def parse_si(s, unit=''):
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if not (match := re.fullmatch(f'([0-9]*)(([.pPnNuUµmrRkKMgG])([0-9]*))?([pPnNuUµmrRkKMgG]?)({unit})?', s)):
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raise ValueError(f'{s} is not a valid number with an SI prefix')
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left, _1, dot, right, prefix, _unit = match.groups()
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prefix = prefix or dot or '.'
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multiplier = si_prefixes.get(prefix, si_prefixes.get(prefix.upper(), si_prefixes.get(prefix.lower())))
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return float(f'{left}.{right or ""}0') * multiplier
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b = pcb.Board.open('self-balancing-test-a.kicad_pcb')
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b.unfill_zones()
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matches = list(b.find_footprints(name='Package_TO_SOT_SMD:SOT-23', sheetfile='resistor_bank.kicad_sch'))
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for i, fp in enumerate(matches):
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alpha = 2*math.pi * i/len(matches)
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fp.at.x, fp.at.y = cx+r, cy
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fp.set_rotation(0)
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fp.rotate(alpha, cx, cy)
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res1, res2 = fp.pads_by_number[3].find_connected(name='Resistor_SMD.*')
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if parse_si(res1.property_value('Value')) > parse_si(res2.property_value('Value')):
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res1, res2 = res2, res1
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res1.at.x, res1.at.y = cx+r+5, cy+2
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res1.set_rotation(0)
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res1.rotate(alpha, cx, cy)
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res2.at.x, res2.at.y = cx+r+5, cy-2
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res2.set_rotation(0)
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res2.rotate(alpha, cx, cy)
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b.write('self-balancing-test-a.testout.kicad_pcb')
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