+ if self.oldpin != self.startedge:
+ # Rising edge
+ # We are on a full cycle we can calculate
+ # the period, the duty cycle and its ratio.
+ period = self.samplenum - self.start_samplenum
+ duty = self.end_samplenum - self.start_samplenum
+ ratio = float(duty / period)
+
+ # This interval starts at this edge.
+ self.ss = self.start_samplenum
+ # Store the new rising edge position and the ending
+ # edge interval.
+ self.start_samplenum = self.es = self.samplenum
+
+ # Report the duty cycle in percent.
+ percent = float(ratio * 100)
+ self.putx([0, ['%f%%' % percent]])
+
+ # Report the duty cycle in the binary output.
+ self.putb([0, bytes([int(ratio * 256)])])
+
+ # Report the period in units of time.
+ period_t = float(period / self.samplerate)
+ self.putp(period_t)
+
+ # Update and report the new duty cycle average.
+ self.num_cycles += 1
+ self.average += percent
+ self.put(self.first_samplenum, self.es, self.out_average,
+ float(self.average / self.num_cycles))
+ else:
+ # Falling edge
+ self.end_samplenum = self.ss = self.samplenum