DecodeSignal: Fix flawed PD stack restoration

[pulseview.git] / pv / data / signalbase.cpp

diff --git a/pv/data/signalbase.cpp b/pv/data/signalbase.cpp
index ee1112d5d5260a67b745a8656590ca023fbeffdb..b43e5bb07f4db8e92c9c797aeb6daa1efc16ce55 100644 (file)
--- a/pv/data/signalbase.cpp
+++ b/pv/data/signalbase.cpp
@@ -310,8 +310,9 @@ void SignalBase::conversion_thread_proc(QObject* segment)
 
                                if (conversion_type_ == A2LConversionBySchmittTrigger) {
                                        const float amplitude = max_v - min_v;
-                                       const float lo_thr = min_v + (amplitude * 0.1);  // 10% above min
-                                       const float hi_thr = max_v - (amplitude * 0.1);  // 10% below max
+                                       const float center = min_v + (amplitude / 2);
+                                       const float lo_thr = center - (amplitude * 0.15); // 15% margin
+                                       const float hi_thr = center + (amplitude * 0.15); // 15% margin
                                        uint8_t state = 0;  // TODO Use value of logic sample n-1 instead of 0
 
                                        // Convert as many sample blocks as we can