Fix duty cycle measurement (was reversed)

bessman · bessman · commit 7f11a003a0dd · 2020-11-05T21:05:34.000+01:00
diff --git a/PSL/logic_analyzer.py b/PSL/logic_analyzer.py
@@ -231,7 +231,7 @@ def measure_duty_cycle(self, channel: str, timeout: float = 1) -> Tuple[float]:
 
         period = t[2] - t[0]
         # First change is HIGH -> LOW since we trigger on rising.
-        duty_cycle = (t[1] - t[0]) / period
+        duty_cycle = 1 - (t[1] - t[0]) / period
 
         return period, duty_cycle
 
