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adc_temperature: Move PrinterADCtoTemperature to adc_temperature.py

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Move the low-level PrinterADCtoTemperature() class from thermistor.py
to adc_temperature.py and use it from the Linear() class.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-01-21 18:29:08 -05:00
parent 0c4fc64ef8
commit 99980817c3
2 changed files with 39 additions and 44 deletions
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27
klippy/extras/thermistor.py
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@ -4,12 +4,9 @@
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import math, logging
import adc_temperature
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:
@ -69,26 +66,6 @@ class Thermistor:
r = math.exp(ln_r)
return r / (self.pullup + r)
# Interface between ADC and heater temperature callbacks
class PrinterADCtoTemperature:
def __init__(self, config, adc_convert):
self.adc_convert = adc_convert
ppins = config.get_printer().lookup_object('pins')
self.mcu_adc = ppins.setup_pin('adc', config.get('sensor_pin'))
self.mcu_adc.setup_adc_callback(REPORT_TIME, self.adc_callback)
def setup_callback(self, temperature_callback):
self.temperature_callback = temperature_callback
def get_report_time_delta(self):
return REPORT_TIME
def adc_callback(self, read_time, read_value):
temp = self.adc_convert.calc_temp(read_value)
self.temperature_callback(read_time + SAMPLE_COUNT * SAMPLE_TIME, temp)
def setup_minmax(self, min_temp, max_temp):
adc_range = [self.adc_convert.calc_adc(t) for t in [min_temp, max_temp]]
self.mcu_adc.setup_minmax(SAMPLE_TIME, SAMPLE_COUNT,
minval=min(adc_range), maxval=max(adc_range),
range_check_count=RANGE_CHECK_COUNT)
# Create an ADC converter with a thermistor
def PrinterThermistor(config, params):
pullup = config.getfloat('pullup_resistor', 4700., above=0.)
@ -100,7 +77,7 @@ def PrinterThermistor(config, params):
thermistor.setup_coefficients(
params['t1'], params['r1'], params['t2'], params['r2'],
params['t3'], params['r3'], name=config.get_name())
return PrinterADCtoTemperature(config, thermistor)
return adc_temperature.PrinterADCtoTemperature(config, thermistor)
# Custom defined thermistors from the config file
class CustomThermistor: