deviceEigerP11.py: create constants for default frame numbers

kamzik3/devices/deviceEigerP11.py

@@ -32,6 +32,11 @@ from kamzik3.macro.step import Step, StepDeviceMethod
 from kamzik3.snippets.snippetsDecorators import expose_method
 
 
+FRAMES_PER_FILE_SCAN = 1000
+FRAMES_PER_FILE_LIVE = 1000000
+# any large number is ok, images are not saved in the live-view mode
+
+
 class InterfaceStatus(IntEnum):
     """Status of the Eiger interface (filewriter, eigerstream, monitor)."""
 
@@ -184,7 +189,6 @@ class DeviceTangoEigerDetector(DeviceTango):
 
         :param Exposure: desired exposure time per frame
         """
-        frames_per_file = 1000000
         self.logger.info("Live view has started.")
         self.set_attribute(["TriggerMode", VALUE], TriggerMode.INTS.value)
         if self.file_writer is not None:
@@ -192,7 +196,9 @@ class DeviceTangoEigerDetector(DeviceTango):
             self.set_attribute(
                 ["FileWriter", "Mode", VALUE], InterfaceStatus.DISABLED.value
             )
-            self.set_attribute(["FileWriter", "NimagesPerFile", VALUE], frames_per_file)
+            self.set_attribute(
+                ["FileWriter", "NimagesPerFile", VALUE], FRAMES_PER_FILE_LIVE
+            )
         if self.eiger_stream is not None:
             self.logger.info("EigerStream disabled")
             self.set_attribute(
@@ -205,11 +211,11 @@ class DeviceTangoEigerDetector(DeviceTango):
         self.set_attribute(["FrameTime", VALUE], frame_time)
         self.set_attribute(["CountTime", VALUE], exposure)
         self.set_attribute(["Ntrigger", VALUE], 1)
-        self.set_attribute(["Nimages", VALUE], frames_per_file)
+        self.set_attribute(["Nimages", VALUE], FRAMES_PER_FILE_LIVE)
         self.Arm()
         self.Trigger()
         self.set_value(
-            ATTR_FRAME_COUNT, self.get_value(ATTR_FRAME_COUNT) + frames_per_file
+            ATTR_FRAME_COUNT, self.get_value(ATTR_FRAME_COUNT) + FRAMES_PER_FILE_LIVE
         )
 
     @expose_method()
@@ -409,6 +415,8 @@ class EigerScanner(DeviceScanner):
             ["FileWriter", "Mode", VALUE], InterfaceStatus.ENABLED.value
         )
         self.detector.set_attribute(["FileWriter", "NamePattern", VALUE], path)
-        self.detector.set_attribute(["FileWriter", "NimagesPerFile", VALUE], 1000)
+        self.detector.set_attribute(
+            ["FileWriter", "NimagesPerFile", VALUE], FRAMES_PER_FILE_SCAN
+        )
 
         self.detector.Arm()