def main():
global epaper
global shutting_down
global details_to_display
epaper = EPaper(debug_mode=DEBUG_MODE)
atexit.register(shutdown_hook)
signal.signal(signal.SIGTERM, signal_hook)
buttons = None
if not DEBUG_MODE and (os.environ.get("EPAPER_BUTTONS_ENABLED", "true")
== "true"):
from buttons import Buttons
buttons = Buttons([
int(os.environ.get("EPAPER_GPIO_PIN_FOR_KEY1", "5")),
int(os.environ.get("EPAPER_GPIO_PIN_FOR_KEY2", "6")),
int(os.environ.get("EPAPER_GPIO_PIN_FOR_KEY3", "13")),
int(os.environ.get("EPAPER_GPIO_PIN_FOR_KEY4", "19"))
], lambda key: action_button(key, epaper))
notifier = sdnotify.SystemdNotifier()
notifier.notify("READY=1")
while True:
if shutting_down:
logging.info("App is shutting down.....")
break
notifier.notify("WATCHDOG=1")
if details_to_display is not None:
logging.info(
"Going to refresh the main screen with details view...")
details_to_display()
details_to_display = None
buttons.set_not_busy()
for i in range(10):
time.sleep(0.5)
if details_to_display is not None:
logging.info("Got button pressed while in details!")
break
if details_to_display is not None:
continue
logging.info("Ok, enough - going back to standard view")
refresh_main_screen(epaper, force=True)
else:
logging.info("Going to refresh the main screen...")
refresh_main_screen(epaper)
for i in range(300 if buttons is not None else 1
): # lower the CPU usage when no buttons handled
if shutting_down:
logging.info("App is shutting down...")
break
if details_to_display is not None:
logging.info("Got button pressed!")
break
time.sleep(1 if buttons is not None else 300)
