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fan: Default to using software PWM

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Not all hardware has PWM support and there is no compelling reason to
use hardware PWM for fans.  Change the default to use software PWM.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2017-03-08 20:00:27 -05:00
parent 37bac916e7
commit bcaf818c0e
7 changed files with 15 additions and 14 deletions
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klippy/heater.py
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@@ -16,6 +16,7 @@ Thermistors = {
SAMPLE_TIME = 0.001
SAMPLE_COUNT = 8
REPORT_TIME = 0.300
PWM_CYCLE_TIME = 0.100
KELVIN_TO_CELCIUS = -273.15
MAX_HEAT_TIME = 5.0
AMBIENT_TEMP = 25.
@@ -55,7 +56,7 @@ class PrinterHeater:
heater_pin, MAX_HEAT_TIME)
else:
self.mcu_pwm = self.printer.mcu.create_pwm(
heater_pin, 0, MAX_HEAT_TIME)
heater_pin, PWM_CYCLE_TIME, 0, MAX_HEAT_TIME)
self.mcu_adc = self.printer.mcu.create_adc(thermistor_pin)
min_adc = self.calc_adc(self.max_temp)
max_adc = self.calc_adc(self.min_temp)