don't use spi temp until connect has happened

print stacktrace if clock is used before frequency is set

klippy/clocksync.py

@@ -3,7 +3,7 @@
 # Copyright (C) 2016-2018  Kevin O'Connor <kevin@koconnor.net>
 #
 # This file may be distributed under the terms of the GNU GPLv3 license.
-import logging, math
+import logging, math, traceback
 
 RTT_AGE = 0.000010 / (60.0 * 60.0)
 DECAY = 1.0 / 30.0
@@ -237,10 +237,18 @@ def connect_file(self, serial, pace=False):
 
     # clock frequency conversions
     def print_time_to_clock(self, print_time):
+        if self.clock_adj[1] == 1.0:
+            logging.warning("Clock not yet synchronized, clock is untrustworthy")
+            for line in traceback.format_stack():
+                logging.warning(line.strip())
         adjusted_offset, adjusted_freq = self.clock_adj
         return int((print_time - adjusted_offset) * adjusted_freq)
 
     def clock_to_print_time(self, clock):
+        if self.clock_adj[1] == 1.0:
+            logging.warning("Clock not yet synchronized, print time is untrustworthy")
+            for line in traceback.format_stack():
+                logging.warning(line.strip())
         adjusted_offset, adjusted_freq = self.clock_adj
         return clock / adjusted_freq + adjusted_offset
 

klippy/extras/spi_temperature.py

@@ -32,9 +32,13 @@ def __init__(self, config, chip_type, config_cmd=None, spi_mode=1):
         self.mcu = mcu = self.spi.get_mcu()
         # Reader chip configuration
         self.oid = oid = mcu.create_oid()
+        self.printer.register_event_handler(
+            "klippy:connect", self._handle_connect
+        )
         mcu.register_response(
             self._handle_spi_response, "thermocouple_result", oid
         )
+        self._is_connected = False
         mcu.register_config_callback(self._build_config)
 
     def setup_minmax(self, min_temp, max_temp):
@@ -48,6 +52,9 @@ def setup_callback(self, cb):
     def get_report_time_delta(self):
         return REPORT_TIME
 
+    def _handle_connect(self):
+        self._is_connected = True
+
     def _build_config(self):
         self.mcu.add_config_cmd(
             "config_thermocouple oid=%u spi_oid=%u thermocouple_type=%s"
@@ -76,6 +83,8 @@ def _build_config(self):
         )
 
     def _handle_spi_response(self, params):
+        if not self._is_connected:
+            return
         if params["fault"]:
             self.handle_fault(params["value"], params["fault"])
             return