DAQ: bug in using enums for area_detector fixed

src/aare/devices/area_detector.py

@@ -175,13 +175,13 @@ class epicsAD(object):
         self.acquire.put(1)
 
     def set_auto_once(self):
-        self.expo_mode.put(AutoEnum.ONCE)
-        self.gain_mode.put(AutoEnum.ONCE)
+        self.expo_mode.put(AutoEnum.ONCE.value)
+        self.gain_mode.put(AutoEnum.ONCE.value)
 
     def set_manual(self):
         self.acquire.put(0, wait=True)
-        self.gain_mode.put(AutoEnum.MANUAL)  # automatic gain control
-        self.expo_mode.put(AutoEnum.MANUAL)  # automatic exposure control
+        self.gain_mode.put(AutoEnum.MANUAL.value)  # manual gain control
+        self.expo_mode.put(AutoEnum.MANUAL.value)  # manual exposure control
         self.acquire.put(1)
 
     def restore(self, gain: float = 5, expo: float = 0.025):