+ def inspect_edge(self, rxtx, signal, inv):
+ # Inspect edges, independently from traffic, to detect break conditions.
+ if inv:
+ signal = not signal
+ if not signal:
+ # Signal went low. Start another interval.
+ self.break_start[rxtx] = self.samplenum
+ return
+ # Signal went high. Was there an extended period with low signal?
+ if self.break_start[rxtx] is None:
+ return
+ diff = self.samplenum - self.break_start[rxtx]
+ if diff >= self.break_min_sample_count:
+ self.handle_break(rxtx)
+ self.break_start[rxtx] = None
+