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templates/tools/dsview/decoders/transistor_pair/pd.py

89 lines
3.9 KiB
Python

"""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))