94 lines
4.4 KiB
Python
94 lines
4.4 KiB
Python
# Анализ двух комплементарных входов транзисторной пары. Совместное включение, паузы и
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# интервалы определяются только по этим входам; ACK/Vstat драйвера не участвуют в данной
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# модели. Этот адаптер переводит события libsigrokdecode в аннотации DSView; координаты
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# выборок пересчитываются с учётом частоты захвата.
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"""Two-input transistor pair analyzer, independent of driver feedback."""
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import sigrokdecode as srd
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from common.setgui_decoders.transistor_pair import PairTimingChecker
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class Decoder(srd.Decoder):
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api_version = 3
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id = 'transistor_pair'
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name = 'Transistor pair'
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longname = 'Transistor pair: mintime / deadtime / overlap'
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desc = 'Checks ON/OFF pulse limits, deadtime, overlap, frequency and duty.'
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license = 'gplv2+'
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inputs = ['logic']
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outputs = []
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tags = ['Clock/timing', 'Util']
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channels = (
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{'id': 'vin1', 'name': 'Vin1', 'desc': 'First transistor command'},
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{'id': 'vin2', 'name': 'Vin2', 'desc': 'Second transistor command'},
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)
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options = (
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{'id': 'vin1_active', 'desc': 'Vin1 active level', 'default': 'high', 'values': ('high', 'low')},
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{'id': 'vin2_active', 'desc': 'Vin2 active level', 'default': 'high', 'values': ('high', 'low')},
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{'id': 'vin1_mintime_ns', 'desc': 'Vin1 minimum ON time (ns)', 'default': 0},
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{'id': 'vin2_mintime_ns', 'desc': 'Vin2 minimum ON time (ns)', 'default': 0},
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{'id': 'vin1_minoff_ns', 'desc': 'Vin1 minimum OFF time (ns)', 'default': 0},
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{'id': 'vin2_minoff_ns', 'desc': 'Vin2 minimum OFF time (ns)', 'default': 0},
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{'id': 'deadtime_12_ns', 'desc': 'Minimum deadtime Vin1 -> Vin2 (ns)', 'default': 0},
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{'id': 'deadtime_21_ns', 'desc': 'Minimum deadtime Vin2 -> Vin1 (ns)', 'default': 0},
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)
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annotations = (
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('vin1-on', 'Vin1 ON duration'), ('vin2-on', 'Vin2 ON duration'),
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('deadtime', 'Deadtime'), ('failure', 'FAULT'),
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('vin1-off', 'Vin1 OFF duration'), ('vin2-off', 'Vin2 OFF duration'),
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('vin1-period', 'Vin1 period / frequency / duty'),
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('vin2-period', 'Vin2 period / frequency / duty'),
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)
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annotation_rows = (
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('deadtime', 'Deadtime', (2,)),
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('faults', 'FAULT: overlap / timing', (3,)),
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('vin1', 'Vin1 mintime / OFF', (0, 4)),
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('vin2', 'Vin2 mintime / OFF', (1, 5)),
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('pwm1', 'Vin1 period / frequency / duty', (6,)),
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('pwm2', 'Vin2 period / frequency / duty', (7,)),
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)
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def __init__(self):
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self.reset()
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def reset(self):
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self.samplerate = None
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self.checker = None
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def metadata(self, key, value):
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if key == srd.SRD_CONF_SAMPLERATE:
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self.samplerate = value
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def start(self):
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self.out_ann = self.register(srd.OUTPUT_ANN)
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def _put_events(self, events):
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for event in events:
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kind = event['kind']
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channel = event.get('channel', 1) - 1
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ann = (3 if kind in ('mintime_fail', 'deadtime_fail', 'off_fail', 'overlap') else
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2 if kind == 'deadtime' else channel if kind == 'mintime_ok' else
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4 + channel if kind == 'off_time' else 6 + channel)
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self.put(event['start'], event['end'], self.out_ann, [ann, [event['text'], event['short']]])
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def decode(self):
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if not self.samplerate:
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raise ValueError('Cannot decode without samplerate.')
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if not self.has_channel(0) or not self.has_channel(1):
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raise ValueError('Connect both Vin1 and Vin2.')
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numeric = {name: self.options[name] for name in (
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'vin1_mintime_ns', 'vin2_mintime_ns', 'vin1_minoff_ns', 'vin2_minoff_ns',
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'deadtime_12_ns', 'deadtime_21_ns')}
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self.checker = PairTimingChecker(self.samplerate,
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self.options['vin1_active'] == 'high', self.options['vin2_active'] == 'high', **numeric)
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# Do not retain DSView's mutable native wait tuple.
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pins = list(self.wait({}))
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self._put_events(self.checker.update(self.samplenum, *pins))
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while True:
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pins = list(self.wait([{0: 'e'}, {1: 'e'}]))
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self._put_events(self.checker.update(self.samplenum, *pins))
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def end(self):
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if self.checker is not None:
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self._put_events(self.checker.finish(self.samplenum))
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