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heater: Handle case where min adc value is less than max adc value 

When using a sensor that isn't a thermisistor, the maximum and minimum
adc values may be swapped - handle that case.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-03-06 15:19:52 -05:00
parent d21b9280f0
commit 4388a294a4
1 changed files with 4 additions and 5 deletions
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9
klippy/heater.py
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@ -10,7 +10,7 @@ Thermistors = {
"EPCOS 100K B57560G104F": (
0.000722136308968056, 0.000216766566488498, 8.92935804531095e-08),
"ATC Semitec 104GT-2": (
0.000809651054275124, 0.000211636030735685, 7.07420883993973e-08),
0.000809651054275124, 0.000211636030735685, 7.07420883993973e-08),
}
SAMPLE_TIME = 0.001
@ -52,10 +52,9 @@ class PrinterHeater:
self.mcu_pwm = printer.mcu.create_pwm(
heater_pin, PWM_CYCLE_TIME, 0, MAX_HEAT_TIME)
self.mcu_adc = printer.mcu.create_adc(thermistor_pin)
min_adc = self.calc_adc(self.max_temp)
max_adc = self.calc_adc(self.min_temp)
self.mcu_adc.set_minmax(
SAMPLE_TIME, SAMPLE_COUNT, minval=min_adc, maxval=max_adc)
adc_range = [self.calc_adc(self.min_temp), self.calc_adc(self.max_temp)]
self.mcu_adc.set_minmax(SAMPLE_TIME, SAMPLE_COUNT,
minval=min(adc_range), maxval=max(adc_range))
self.mcu_adc.set_adc_callback(REPORT_TIME, self.adc_callback)
self.control = algo(self, config)
# pwm caching