+ def inspect_idle(self, rxtx, signal, inv):
+ # Check each edge and each period of stable input (either level).
+ # Can derive the "idle frame period has passed" condition.
+ if inv:
+ signal = not signal
+ if not signal:
+ # Low input, cease inspection.
+ self.idle_start[rxtx] = None
+ return
+ # High input, either just reached, or still stable.
+ if self.idle_start[rxtx] is None:
+ self.idle_start[rxtx] = self.samplenum
+ diff = self.samplenum - self.idle_start[rxtx]
+ if diff < self.frame_len_sample_count:
+ return
+ ss, es = self.idle_start[rxtx], self.samplenum
+ self.putpse(ss, es, ['IDLE', rxtx, 0])
+ self.idle_start[rxtx] = self.samplenum
+