Track completed Single acquisitions and persist recent addresses

python/set_devices/tektronix_capture_state.py

@@ -0,0 +1,24 @@
+"""Read completed Single records once, without interfering with acquisition."""
+class CaptureState:
+    def __init__(self):
+        self.armed = False
+        self.delivered = None
+
+    def arm(self):
+        self.armed = True
+
+    def ready(self, status):
+        running, single, count = status
+        if not single:
+            self.armed = False
+            self.delivered = None
+            return running
+        if running or count == 0:
+            self.armed = True
+            return False
+        return count > 0 and (self.armed or self.delivered != count)
+
+    def consumed(self, status):
+        if status[1]:
+            self.delivered = status[2]
+            self.armed = False