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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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10
klippy/mcu.py
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@ -251,7 +251,7 @@ class MCU_digital_out:
class MCU_pwm:
PWM_MAX = 255.
def __init__(self, mcu, pin, cycle_ticks, max_duration, hard_pwm=True):
def __init__(self, mcu, pin, cycle_ticks, max_duration, hard_pwm=False):
self._mcu = mcu
self._oid = mcu.create_oid()
self._last_clock = 0
@ -510,14 +510,14 @@ class MCU:
def create_digital_out(self, pin, max_duration=2.):
max_duration = int(max_duration * self._mcu_freq)
return MCU_digital_out(self, pin, max_duration)
def create_pwm(self, pin, hard_cycle_ticks, max_duration=2.):
def create_pwm(self, pin, cycle_time, hard_cycle_ticks=0, max_duration=2.):
max_duration = int(max_duration * self._mcu_freq)
if hard_cycle_ticks:
return MCU_pwm(self, pin, hard_cycle_ticks, max_duration)
return MCU_pwm(self, pin, hard_cycle_ticks, max_duration, True)
if hard_cycle_ticks < 0:
return MCU_digital_out(self, pin, max_duration)
cycle_ticks = int(self._mcu_freq / 10.)
return MCU_pwm(self, pin, cycle_ticks, max_duration, hard_pwm=False)
cycle_ticks = int(cycle_time * self._mcu_freq)
return MCU_pwm(self, pin, cycle_ticks, max_duration, False)
def create_adc(self, pin):
return MCU_adc(self, pin)
# Clock syncing