Add DSLogic capture, signal conversion and DSView decoders

tools/dsview/decoders/transistor_pair/README.md

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+# Transistor pair
+
+Independent two-channel analyzer. Assign Vin1 and Vin2; Vstat is not used.
+Available in DSView's **Пользовательские** section as **Transistor pair**.
+
+- Minimum active ON pulse duration (mintime), independently per input.
+- Minimum inactive OFF duration, independently per input.
+- Deadtime from Vin1 OFF to Vin2 ON and vice versa, with independent minimums.
+- Active overlap is a fault, regardless of the deadtime settings.
+- Period, frequency and active duty cycle for complete cycles on each input.
+- Independent active-high/active-low polarity for both inputs.
+
+All limits are nanoseconds. Zero disables the corresponding lower limit;
+equality passes. Simultaneous handovers measure zero deadtime. These settings
+check measured pulses and do not debounce or filter the source waveform.
+
+Measurements occupy separate waveform rows. Timing violations appear in the
+FAULT row. Unknown edges outside the capture are not fabricated; partial
+pulses do not produce full pulse widths or full-cycle frequency/duty values.
+
+Python: `PairTimingChecker` in `logic_analyzer.decoders.transistor_pair`.
+Offline API: `analyze_capture(..., dict(mode='Transistor pair', channel=0,
+vin2_channel=1, vin1_mintime_ns=100, deadtime_12_ns=50))`.
+
+For Vin/Vstat ACK checks and full driver-cycle OK/WARNING/FAULT results use
+the separate **IGBT 1SP/1SD** decoder.

tools/dsview/decoders/transistor_pair/__init__.py

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+from .pd import Decoder

tools/dsview/decoders/transistor_pair/pd.py

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