fix(mcs): omit_mca_callbacks if stop is called.

csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py

@@ -392,6 +392,7 @@ class MCSCardCSAXS(PSIDeviceBase, MCSCard):
         self._current_data_index = 0
 
         # NOTE Make sure that the signal that omits mca callbacks is cleared
+        # DO NOT REMOVE!!
         self._omit_mca_callbacks.clear()
 
         # For a fly scan we need to start the mcs card ourselves
@@ -547,8 +548,9 @@ class MCSCardCSAXS(PSIDeviceBase, MCSCard):
 
     def on_stop(self) -> None:
         """Hook called when the device is stopped. In addition, any status that is registered through cancel_on_stop will be cancelled here."""
-        self.stop_all.put(1)
-        self.erase_all.put(1)
+        with suppress_mca_callbacks(self):
+            self.stop_all.put(1)
+            self.erase_all.put(1)
 
     def mcs_recovery(self, timeout: int = 1) -> None:
         """

tests/tests_devices/test_mcs_card.py

@@ -217,6 +217,16 @@ def test_mcs_card_csaxs_complete_and_stop(mock_mcs_csaxs: MCSCardCSAXS):
     assert not mcs._start_monitor_async_data_emission.is_set()
 
 
+def test_mcs_on_stop(mock_mcs_csaxs: MCSCardCSAXS):
+    """Test that on stop sets the omit_mca_callbacks flag. Also test that on stage clears the omit_mca_callbacks flag."""
+    mcs = mock_mcs_csaxs
+    assert mcs._omit_mca_callbacks.is_set() is False
+    mcs.stop()
+    assert mcs._omit_mca_callbacks.is_set() is True
+    mcs.stage()
+    assert mcs._omit_mca_callbacks.is_set() is False
+
+
 def test_mcs_recovery(mock_mcs_csaxs: MCSCardCSAXS):
     mcs = mock_mcs_csaxs
     # Simulate ongoing acquisition