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Switch PWM to use an Event.

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This commit is contained in:
Phil Howard
2025-02-26 14:11:19 +00:00
parent d98b694622
commit 3ff4f65a61
1 changed files with 5 additions and 6 deletions
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11
grow/pwm.py
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@@ -1,5 +1,5 @@
import time import time
from threading import Thread from threading import Event, Thread
import gpiod import gpiod
import gpiodevice import gpiodevice
@@ -11,19 +11,18 @@ OUTL = gpiod.LineSettings(direction=Direction.OUTPUT, output_value=Value.INACTIV
class PWM: class PWM:
_pwms: list = [] _pwms: list = []
_t_pwm: Thread = None _t_pwm: Thread = None
_pwm_running: bool = False _t_pwm_event: Event = Event()
@staticmethod @staticmethod
def start_thread(): def start_thread():
if PWM._t_pwm is None: if PWM._t_pwm is None:
PWM._pwm_running = True
PWM._t_pwm = Thread(target=PWM._run) PWM._t_pwm = Thread(target=PWM._run)
PWM._t_pwm.start() PWM._t_pwm.start()
@staticmethod @staticmethod
def stop_thread(): def stop_thread():
if PWM._t_pwm is not None: if PWM._t_pwm is not None:
PWM._pwm_running = False PWM._t_pwm_event.set()
PWM._t_pwm.join() PWM._t_pwm.join()
PWM._t_pwm = None PWM._t_pwm = None
@@ -34,13 +33,13 @@ class PWM:
@staticmethod @staticmethod
def _remove(pwm): def _remove(pwm):
index = PWM._pwms.index(pwm) index = PWM._pwms.index(pwm)
del PWM._pwms[index] PWM._pwms.pop(index)
if len(PWM._pwms) == 0: if len(PWM._pwms) == 0:
PWM.stop_thread() PWM.stop_thread()
@staticmethod @staticmethod
def _run(): def _run():
while PWM._pwm_running: while not PWM._t_pwm_event.is_set():
PWM.run() PWM.run()
@staticmethod @staticmethod