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| author | Kevin O'Connor <kevin@koconnor.net> | 2018-07-02 13:47:22 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2018-07-02 13:56:34 -0400 |
| commit | 0dbfa915de5495662102d17c7a11cea219354b91 (patch) | |
| tree | 902109825fd2653ca7bd98a259e421522a69280c /klippy/extras/thermistor.py | |
| parent | 5b3444c060a51b27fc19ec6386029f00385ba42a (diff) | |
| download | kutter-0dbfa915de5495662102d17c7a11cea219354b91.tar.gz kutter-0dbfa915de5495662102d17c7a11cea219354b91.tar.xz kutter-0dbfa915de5495662102d17c7a11cea219354b91.zip | |
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>
Diffstat (limited to 'klippy/extras/thermistor.py')
| -rw-r--r-- | klippy/extras/thermistor.py | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/klippy/extras/thermistor.py b/klippy/extras/thermistor.py index 3f96066d..c39ae66e 100644 --- a/klippy/extras/thermistor.py +++ b/klippy/extras/thermistor.py @@ -9,6 +9,7 @@ KELVIN_TO_CELCIUS = -273.15 SAMPLE_TIME = 0.001 SAMPLE_COUNT = 8 REPORT_TIME = 0.300 +RANGE_CHECK_COUNT = 4 # Analog voltage to temperature converter for thermistors class Thermistor: @@ -59,7 +60,8 @@ class Thermistor: 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): |