def _get_stim(self, channel):
epo = Epoch()
ttls = self._kwe['event_types']['TTL']['events']['time_samples'].value
event_channels = self._kwe['event_types']['TTL']['events'][
'user_data']['event_channels'].value
event_id = self._kwe['event_types']['TTL']['events']['user_data'][
'eventID'].value
epo.times = (ttls[(event_channels == channel) & (event_id == 1)] /
self._attrs['kwe']['sample_rate']) * pq.s
off_times = (ttls[(event_channels == channel) & (event_id == 0)] /
self._attrs['kwe']['sample_rate']) * pq.s
epo.durations = off_times - epo.times # TODO check length match
epo.name = 'StimulusTTL'
return epo
