fix(ddg): fix prepare_mcs_on_trigger method

csaxs_bec/devices/epics/delay_generator_csaxs/ddg_1.py

@@ -364,7 +364,7 @@ class DDG1(PSIDeviceBase, DelayGeneratorCSAXS):
         time.sleep(0.2)
         logger.info(f"DDG {self.name} on_stage completed in {time.time() - start_time:.3f}s.")
 
-    def prepare_mcs_on_trigger(self, mcs: MCSCardCSAXS) -> None:
+    def prepare_mcs_on_trigger(self) -> CompareStatus:
         """
 
         This method is used by the DDG1 on_trigger method to prepare the MCS card for the next trigger.
@@ -373,6 +373,12 @@ class DDG1(PSIDeviceBase, DelayGeneratorCSAXS):
 
         It relies on the MCS card implementation and needs to be adapted if the MCS card logic changes.
         """
+        mcs_name = "mcs"
+        if self.device_manager is None or not hasattr(self.device_manager, "devices"):
+            raise ValueError("Device manager is not properly initialized.")
+        mcs = self.device_manager.devices.get(mcs_name, None)
+        if mcs is None:
+            raise ValueError(f"MCS card {mcs_name} not found in device manager.")
 
         # NOTE First we wait that the MCS card is not acquiring. We add here a timeout of 5s to avoid
         # a deadlock in case the MCS card is stuck for some reason. This should not happen normally.
@@ -588,7 +594,7 @@ class DDG1(PSIDeviceBase, DelayGeneratorCSAXS):
         else:
             start_time = time.time()
             logger.debug(f"Preparing mcs card ")
-            status_mcs = self._prepare_mcs_on_trigger(mcs)
+            status_mcs = self._prepare_mcs_on_trigger()
             # NOTE Timeout of 3s should be plenty, any longer wait should checked. If this happens to crash
             # an acquisition regularly with a WaitTimeoutError, the timeout can be increased but it should
             # be investigated why the EPICS interface is slow to respond.