adccmds: Add support for min/max temperature check filtering

Extend the ADC out of range check so that it is possible to sample
multiple times before going into a shutdown state.  This reduces the
chance that measurement noise will cause an error.  In an actual over
temperature (or under temperature event) it is expected that the
sensor will consistently report the problem, so extra checks for an
additional second or two should not substantially increase risk.

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

klippy/extras/adc_temperature.py

@@ -8,6 +8,7 @@ import logging, bisect
 SAMPLE_TIME = 0.001
 SAMPLE_COUNT = 8
 REPORT_TIME = 0.300
+RANGE_CHECK_COUNT = 4
 
 # Linear style conversion chips calibrated with two temp measurements
 class Linear:
@@ -50,7 +51,8 @@ class Linear:
     def setup_minmax(self, min_temp, max_temp):
         adc_range = [self.calc_adc(min_temp), self.calc_adc(max_temp)]
         self.mcu_adc.setup_minmax(SAMPLE_TIME, SAMPLE_COUNT,
-                                  minval=min(adc_range), maxval=max(adc_range))
+                                  minval=min(adc_range), maxval=max(adc_range),
+                                  range_check_count=RANGE_CHECK_COUNT)
     def setup_callback(self, temperature_callback):
         self.temperature_callback = temperature_callback
     def get_report_time_delta(self):