21 行
999 B
Python
21 行
999 B
Python
"""Electrical contracts for the ten explicit USB2517 strap pulldowns."""
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STRAPS = dict(zip(range(900, 910), (51, 49, 47, 33, 31, 17, 15, 50, 48, 34)))
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REFS = {f'R{n}' for n in STRAPS}
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def verify_hub_straps(board, check):
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for refnum, pin in STRAPS.items():
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ref = f'R{refnum}'
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check(f'Hub strap {ref} approved 100k part',
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board.parts[ref]['MPN'] == '0402WGF1003TCE'
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and board.parts[ref]['LCSC'] == 'C25741' and board.resistor(ref) == 100000)
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check(f'Hub strap U32.{pin} dedicated pull-down',
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board.net_members[board.net('U32', pin)] == {('U32', str(pin)), (ref, '2')}
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and board.net(ref, 1) == 'GND')
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for pin, ref in ((41, 'R711'), (42, 'R712')):
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check(f'Hub configuration select {pin} low',
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board.resistor(ref) == 10000 and
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{board.net(ref, 1), board.net(ref, 2)} == {'GND', board.net('U32', pin)})
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check('Hub configuration select 13 low', board.net('U32', 13) == 'GND')
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