homing: Don't raise a TimeoutError from home_wait()

Change home_wait() to return if the homing operation completed
succesfully or not.  This simplifies the callers.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/extras/bltouch.py

@@ -57,7 +57,6 @@ class BLTouchEndstopWrapper:
         self.get_steppers = self.mcu_endstop.get_steppers
         self.home_wait = self.mcu_endstop.home_wait
         self.query_endstop = self.mcu_endstop.query_endstop
-        self.TimeoutError = self.mcu_endstop.TimeoutError
         # Register BLTOUCH_DEBUG command
         self.gcode = self.printer.lookup_object('gcode')
         self.gcode.register_command("BLTOUCH_DEBUG", self.cmd_BLTOUCH_DEBUG,
@@ -98,9 +97,8 @@ class BLTouchEndstopWrapper:
         self.mcu_endstop.home_start(check_start_time, ENDSTOP_SAMPLE_TIME,
                                     ENDSTOP_SAMPLE_COUNT, ENDSTOP_REST_TIME,
                                     triggered=triggered)
-        try:
-            self.mcu_endstop.home_wait(check_end_time)
-        except self.mcu_endstop.TimeoutError as e:
+        did_trigger = self.mcu_endstop.home_wait(check_end_time)
+        if not did_trigger:
             raise homing.EndstopError("BLTouch failed to %s" % (msg,))
     def raise_probe(self):
         for retry in range(3):

klippy/extras/manual_stepper.py

@@ -91,11 +91,9 @@ class ManualStepper:
         # Wait for endstops to trigger
         error = None
         for mcu_endstop, name in endstops:
-            try:
-                mcu_endstop.home_wait(self.next_cmd_time)
-            except mcu_endstop.TimeoutError as e:
-                if error is None:
-                    error = "Failed to home %s: %s" % (name, str(e))
+            did_trigger = mcu_endstop.home_wait(self.next_cmd_time)
+            if not did_trigger and error is None:
+                error = "Failed to home %s: Timeout during homing" % (name,)
         self.sync_print_time()
         if error is not None:
             raise homing.CommandError(error)

klippy/extras/probe.py

@@ -295,7 +295,6 @@ class ProbeEndstopWrapper:
         self.home_start = self.mcu_endstop.home_start
         self.home_wait = self.mcu_endstop.home_wait
         self.query_endstop = self.mcu_endstop.query_endstop
-        self.TimeoutError = self.mcu_endstop.TimeoutError
     def _build_config(self):
         kin = self.printer.lookup_object('toolhead').get_kinematics()
         for stepper in kin.get_steppers():

klippy/homing.py

@@ -71,11 +71,9 @@ class Homing:
         # Wait for endstops to trigger
         move_end_print_time = self.toolhead.get_last_move_time()
         for mcu_endstop, name in endstops:
-            try:
-                mcu_endstop.home_wait(move_end_print_time)
-            except mcu_endstop.TimeoutError as e:
-                if error is None:
-                    error = "Failed to home %s: %s" % (name, str(e))
+            did_trigger = mcu_endstop.home_wait(move_end_print_time)
+            if not did_trigger and error is None:
+                error = "Failed to home %s: Timeout during homing" % (name,)
         # Determine stepper halt positions
         self.toolhead.flush_step_generation()
         end_mcu_pos = [(s, name, spos, s.get_mcu_position())

klippy/mcu.py

@@ -10,8 +10,6 @@ class error(Exception):
     pass
 
 class MCU_endstop:
-    class TimeoutError(Exception):
-        pass
     RETRY_QUERY = 1.000
     def __init__(self, mcu, pin_params):
         self._mcu = mcu
@@ -106,8 +104,7 @@ class MCU_endstop:
             s.note_homing_end(did_trigger=did_trigger)
         if not self._trigger_completion.test():
             self._trigger_completion.complete(False)
-        if not did_trigger:
-            raise self.TimeoutError("Timeout during endstop homing")
+        return did_trigger
     def query_endstop(self, print_time):
         clock = self._mcu.print_time_to_clock(print_time)
         if self._mcu.is_fileoutput():