ae5743529f
This has two useful properties. Firstly it means the watch will be maintained in the background, allowing the REPL to be used for notifications and other updates. Secondly it will save a little bit of power by reducing the work needed to handle spurious wake ups. Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
396 lines
12 KiB
Python
396 lines
12 KiB
Python
# SPDX-License-Identifier: LGPL-3.0-or-later
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# Copyright (C) 2020 Daniel Thompson
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"""Wasp-os system manager
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~~~~~~~~~~~~~~~~~~~~~~~~~
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.. data:: wasp.system
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wasp.system is the system-wide singleton instance of :py:class:`.Manager`.
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Application must use this instance to access the system services provided
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by the manager.
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.. data:: wasp.watch
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wasp.watch is an import of :py:mod:`watch` and is simply provided as a
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shortcut (and to reduce memory by keeping it out of other namespaces).
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"""
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import gc
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import machine
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import micropython
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import watch
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import widgets
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from apps.clock import ClockApp
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from apps.flashlight import FlashlightApp
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from apps.heart import HeartApp
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from apps.launcher import LauncherApp
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from apps.pager import PagerApp, CrashApp
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from apps.settings import SettingsApp
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from apps.steps import StepCounterApp
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from apps.stopwatch import StopwatchApp
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from apps.testapp import TestApp
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class EventType():
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"""Enumerated interface actions.
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MicroPython does not implement the enum module so EventType
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is simply a regular object which acts as a namespace.
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"""
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DOWN = 1
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UP = 2
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LEFT = 3
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RIGHT = 4
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TOUCH = 5
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HOME = 256
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BACK = 257
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class EventMask():
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"""Enumerated event masks.
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"""
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TOUCH = 0x0001
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SWIPE_LEFTRIGHT = 0x0002
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SWIPE_UPDOWN = 0x0004
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BUTTON = 0x0008
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class PinHandler():
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"""Pin (and Signal) event generator.
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TODO: Currently this driver doesn't actually implement any
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debounce but it will!
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"""
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def __init__(self, pin):
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"""
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:param Pin pin: The pin to generate events from
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"""
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self._pin = pin
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self._value = pin.value()
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def get_event(self):
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"""Receive a pin change event.
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Check for a pending pin change event and, if an event is pending,
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return it.
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:return: boolean of the pin state if an event is received, None
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otherwise.
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"""
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new_value = self._pin.value()
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if self._value == new_value:
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return None
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self._value = new_value
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return new_value
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class Manager():
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"""Wasp-os system manager
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The manager is responsible for handling top-level UI events and
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dispatching them to the foreground application. It also provides
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services to the application.
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The manager is expected to have a single system-wide instance
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which can be accessed via :py:data:`wasp.system` .
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"""
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def __init__(self):
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self.app = None
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self.quick_ring = []
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self.launcher = LauncherApp()
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self.launcher_ring = []
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self.blank_after = 15
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self._brightness = 2
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self._button = PinHandler(watch.button)
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self._charging = True
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self._scheduled = False
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self._scheduling = False
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# TODO: Eventually these should move to main.py
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self.register(ClockApp(), True)
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self.register(StepCounterApp(), True)
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self.register(StopwatchApp(), True)
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self.register(HeartApp(), True)
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self.register(FlashlightApp(), False)
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self.register(SettingsApp(), False)
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self.register(TestApp(), False)
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def register(self, app, quick_ring=False):
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"""Register an application with the system.
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:param object app: The application to regsister
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"""
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if quick_ring == True:
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self.quick_ring.append(app)
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else:
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self.launcher_ring.append(app)
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self.launcher_ring.sort(key = lambda x: x.NAME)
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@property
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def brightness(self):
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"""Cached copy of the brightness current written to the hardware."""
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return self._brightness
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@brightness.setter
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def brightness(self, value):
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self._brightness = value
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watch.backlight.set(self._brightness)
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def switch(self, app):
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"""Switch to the requested application.
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"""
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if self.app:
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if 'background' in dir(self.app):
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self.app.background()
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else:
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# System start up...
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watch.display.poweron()
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watch.display.mute(True)
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watch.backlight.set(self._brightness)
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self.sleep_at = watch.rtc.uptime + 90
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# Clear out any configuration from the old application
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self.event_mask = 0
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self.tick_period_ms = 0
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self.tick_expiry = None
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self.app = app
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watch.display.mute(True)
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watch.drawable.reset()
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app.foreground()
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watch.display.mute(False)
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def navigate(self, direction=None):
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"""Navigate to a new application.
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Left/right navigation is used to switch between applications in the
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quick application ring. Applications on the ring are not permitted
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to subscribe to :py:data`EventMask.SWIPE_LEFTRIGHT` events.
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Swipe up is used to bring up the launcher. Clock applications are not
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permitted to subscribe to :py:data`EventMask.SWIPE_UPDOWN` events since
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they should expect to be the default application (and is important that
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we can trigger the launcher from the default application).
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:param int direction: The direction of the navigation
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"""
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app_list = self.quick_ring
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if direction == EventType.LEFT:
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if self.app in app_list:
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i = app_list.index(self.app) + 1
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if i >= len(app_list):
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i = 0
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else:
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i = 0
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self.switch(app_list[i])
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elif direction == EventType.RIGHT:
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if self.app in app_list:
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i = app_list.index(self.app) - 1
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if i < 0:
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i = len(app_list)-1
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else:
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i = 0
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self.switch(app_list[i])
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elif direction == EventType.UP:
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self.switch(self.launcher)
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elif direction == EventType.DOWN:
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if self.app != app_list[0]:
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self.switch(app_list[0])
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else:
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watch.vibrator.pulse()
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elif direction == EventType.HOME or direction == EventType.BACK:
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if self.app != app_list[0]:
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self.switch(app_list[0])
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else:
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self.sleep()
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def request_event(self, event_mask):
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"""Subscribe to events.
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:param int event_mask: The set of events to subscribe to.
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"""
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self.event_mask |= event_mask
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def request_tick(self, period_ms=None):
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"""Request (and subscribe to) a periodic tick event.
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Note: With the current simplistic timer implementation sub-second
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tick intervals are not possible.
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"""
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self.tick_period_ms = period_ms
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self.tick_expiry = watch.rtc.get_uptime_ms() + period_ms
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def keep_awake(self):
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"""Reset the keep awake timer."""
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self.sleep_at = watch.rtc.uptime + self.blank_after
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def sleep(self):
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"""Enter the deepest sleep state possible.
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"""
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watch.backlight.set(0)
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if 'sleep' not in dir(self.app) or not self.app.sleep():
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self.switch(self.quick_ring[0])
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self.app.sleep()
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watch.display.poweroff()
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watch.touch.sleep()
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self._charging = watch.battery.charging()
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self.sleep_at = None
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def wake(self):
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"""Return to a running state.
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"""
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watch.display.poweron()
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if 'wake' in dir(self.app):
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self.app.wake()
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watch.backlight.set(self._brightness)
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watch.touch.wake()
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self.keep_awake()
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def _handle_button(self, state):
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"""Process a button-press (or unpress) event.
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"""
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self.keep_awake()
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if bool(self.event_mask & EventMask.BUTTON):
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# Currently we only support one button
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if not self.app.press(EventType.HOME, state):
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# If app reported None or False then we are done
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return
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if state:
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self.navigate(EventType.HOME)
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def _handle_touch(self, event):
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"""Process a touch event.
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"""
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self.keep_awake()
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event_mask = self.event_mask
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if event[0] < 5:
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updown = event[0] == 1 or event[0] == 2
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if (bool(event_mask & EventMask.SWIPE_UPDOWN) and updown) or \
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(bool(event_mask & EventMask.SWIPE_LEFTRIGHT) and not updown):
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if self.app.swipe(event):
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self.navigate(event[0])
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else:
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self.navigate(event[0])
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elif event[0] == 5 and self.event_mask & EventMask.TOUCH:
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self.app.touch(event)
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watch.touch.reset_touch_data()
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def _tick(self):
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"""Handle the system tick.
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This function may be called frequently and includes short
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circuit logic to quickly exit if we haven't reached a tick
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expiry point.
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"""
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rtc = watch.rtc
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if self.sleep_at:
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if rtc.update() and self.tick_expiry:
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now = rtc.get_uptime_ms()
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if self.tick_expiry <= now:
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ticks = 0
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while self.tick_expiry <= now:
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self.tick_expiry += self.tick_period_ms
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ticks += 1
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self.app.tick(ticks)
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state = self._button.get_event()
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if None != state:
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self._handle_button(state)
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event = watch.touch.get_event()
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if event:
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self._handle_touch(event)
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if self.sleep_at and watch.rtc.uptime > self.sleep_at:
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self.sleep()
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gc.collect()
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else:
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watch.rtc.update()
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if 1 == self._button.get_event() or \
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self._charging != watch.battery.charging():
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self.wake()
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def run(self, no_except=True):
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"""Run the system manager synchronously.
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This allows all watch management activities to handle in the
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normal execution context meaning any exceptions and other problems
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can be observed interactively via the console.
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"""
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if self._scheduling:
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print('Watch already running in the background')
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return
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if not self.app:
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self.switch(self.quick_ring[0])
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# Reminder: wasptool uses this string to confirm the device has
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# been set running again.
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print('Watch is running, use Ctrl-C to stop')
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if not no_except:
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# This is a simplified (uncommented) version of the loop
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# below
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while True:
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self._tick()
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machine.deepsleep()
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while True:
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try:
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self._tick()
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except KeyboardInterrupt:
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raise
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except Exception as e:
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# Only print the exception if the watch provides a way to do so!
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if 'print_exception' in dir(watch):
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watch.print_exception(e)
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self.switch(CrashApp(e))
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# Currently there is no code to control how fast the system
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# ticks. In other words this code will break if we improve the
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# power management... we are currently relying on not being able
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# to stay in the low-power state for very long.
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machine.deepsleep()
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def _work(self):
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self._scheduled = False
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try:
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self._tick()
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except Exception as e:
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# Only print the exception if the watch provides a way to do so!
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if 'print_exception' in dir(watch):
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watch.print_exception(e)
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self.switch(CrashApp(e))
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def _schedule(self):
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"""Asynchronously schedule a system management cycle."""
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if not self._scheduled:
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self._scheduled = True
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micropython.schedule(Manager._work, self)
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def schedule(self, enable=True):
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"""Run the system manager synchronously."""
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if not self.app:
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self.switch(self.quick_ring[0])
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if enable:
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watch.schedule = self._schedule
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else:
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watch.schedule = watch.nop
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self._scheduling = enable
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system = Manager()
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