protocol: print the DeviceError as something useful

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

tuhi/protocol.py

@@ -446,6 +446,12 @@ class DeviceError(ProtocolError):
         if self.errorcode == DeviceError.ErrorCode.INVALID_STATE:
             self.errno = errno.EBADE
 
+    def __repr__(self):
+        return f'DeviceError.{self.errorcode.name}'
+
+    def __str__(self):
+        return repr(self)
+
 
 class Msg(object):
     '''

tuhi/wacom.py

@@ -23,7 +23,7 @@ from gi.repository import GObject
 from .drawing import Drawing
 from .uhid import UHIDDevice
 import tuhi.protocol
-from tuhi.protocol import NordicData, Interactions, Mode, ProtocolVersion, StrokeFile, UnexpectedDataError, DeviceError, MissingReplyError
+from tuhi.protocol import NordicData, Interactions, Mode, ProtocolVersion, StrokeFile, UnexpectedDataError, DeviceError, MissingReplyError, AuthorizationError
 from .util import list2hex, flatten
 from tuhi.config import TuhiConfig
 
@@ -1017,6 +1017,9 @@ class WacomDevice(GObject.Object):
         except DeviceError as e:
             logger.error(f'**** Exception: {e} ****')
             exception = e
+        except AuthorizationError as e:
+            logger.error(f'Authorization failed, device needs to be re-registered')
+            exception = e
         finally:
             self.sync_state = 0
             self._is_running = False