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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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6
klippy/fan.py
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@ -5,6 +5,7 @@
# This file may be distributed under the terms of the GNU GPLv3 license.
FAN_MIN_TIME = 0.1
PWM_CYCLE_TIME = 0.010
class PrinterFan:
def __init__(self, printer, config):
@ -16,8 +17,9 @@ class PrinterFan:
self.kick_start_time = config.getfloat('kick_start_time', 0.1)
def build_config(self):
pin = self.config.get('pin')
hard_pwm = self.config.getint('hard_pwm', 128)
self.mcu_fan = self.printer.mcu.create_pwm(pin, hard_pwm, 0)
hard_pwm = self.config.getint('hard_pwm', 0)
self.mcu_fan = self.printer.mcu.create_pwm(
pin, PWM_CYCLE_TIME, hard_pwm, 0.)
# External commands
def set_speed(self, print_time, value):
value = max(0., min(1., value))