# SPDX-License-Identifier: LGPL-3.0-or-later # Copyright (C) 2020 Daniel Thompson """WASP system management (including constants) .. data:: system = Manager() system is the system-wide instance of the Manager class. Applications can use this instance to access system services. """ import gc import machine import watch import widgets from apps.clock import ClockApp from apps.flashlight import FlashlightApp from apps.testapp import TestApp class EventType(): """Enumerated interface actions. MicroPython does not implement the enum module so EventType is simply a regular object which acts as a namespace. """ DOWN = 1 UP = 2 LEFT = 3 RIGHT = 4 TOUCH = 5 HOME = 256 class EventMask(): """Enumerated event masks. """ TOUCH = 0x0001 SWIPE_LEFTRIGHT = 0x0002 SWIPE_UPDOWN = 0x0004 BUTTON = 0x0008 class Manager(): """WASP system manager The manager is responsible for handling top-level UI events and dispatching them to the foreground application. It also provides services to the application. The manager is expected to have a single system-wide instance which can be accessed via :py:data:`wasp.system` . """ def __init__(self): self.app = None self.applications = [ ClockApp(), FlashlightApp(), TestApp() ] self.charging = True self._brightness = 2 @property def brightness(self): """Cached copy of the brightness current written to the hardware.""" return self._brightness @brightness.setter def brightness(self, value): self._brightness = value watch.backlight.set(self._brightness) def switch(self, app): """Switch to the requested application. """ if self.app: self.app.background() else: # System start up... watch.display.poweron() watch.display.mute(True) watch.backlight.set(self._brightness) self.sleep_at = watch.rtc.uptime + 90 # Clear out any configuration from the old application self.event_mask = 0 self.tick_period_ms = 0 self.tick_expiry = None self.app = app watch.display.mute(True) app.foreground() watch.display.mute(False) def navigate(self, direction=None): """Navigate to a new application. Left/right navigation is used to switch between applications in the quick application ring. Applications on the ring are not permitted to subscribe to :py:data`EventMask.SWIPE_LEFTRIGHT` events. :param int direction: The direction of the navigation """ app_list = self.applications if direction == EventType.LEFT: i = app_list.index(self.app) + 1 if i >= len(app_list): i = 0 self.switch(app_list[i]) elif direction == EventType.RIGHT: i = app_list.index(self.app) - 1 if i < 0: i = len(app_list)-1 self.switch(app_list[i]) def request_event(self, event_mask): """Subscribe to events. :param int event_mask: The set of events to subscribe to. """ self.event_mask |= event_mask def request_tick(self, period_ms=None): """Request (and subscribe to) a periodic tick event. Note: With the current simplistic timer implementation sub-second tick intervals are not possible. """ self.tick_period_ms = period_ms self.tick_expiry = watch.rtc.get_uptime_ms() + period_ms def keep_awake(self): """Reset the keep awake timer.""" self.sleep_at = watch.rtc.uptime + 15 def sleep(self): """Enter the deepest sleep state possible. """ watch.backlight.set(0) if not self.app.sleep(): self.switch(self.applications[0]) self.app.sleep() watch.display.poweroff() self.charging = watch.battery.charging() self.sleep_at = None def wake(self): """Return to a running state. """ watch.display.poweron() self.app.wake() watch.backlight.set(self._brightness) # Discard any pending touch events _ = watch.touch.get_event() self.keep_awake() def _handle_touch(self, event): """Process a touch event. """ self.keep_awake() event_mask = self.event_mask if event[0] < 5: updown = event[0] == 1 or event[0] == 2 if (bool(event_mask & EventMask.SWIPE_UPDOWN) and updown) or \ (bool(event_mask & EventMask.SWIPE_LEFTRIGHT) and not updown): if self.app.swipe(event): self.navigate(event[0]) else: self.navigate(event[0]) elif event[0] == 5 and self.event_mask & EventMask.TOUCH: self.app.touch(event) def _tick(self): """Handle the system tick. This function may be called frequently and includes short circuit logic to quickly exit if we haven't reached a tick expiry point. """ rtc = watch.rtc if self.sleep_at: if rtc.update() and self.tick_expiry: now = rtc.get_uptime_ms() if self.tick_expiry <= now: ticks = 0 while self.tick_expiry <= now: self.tick_expiry += self.tick_period_ms ticks += 1 self.app.tick(ticks) if watch.button.value(): self.keep_awake() event = watch.touch.get_event() if event: self._handle_touch(event) if watch.rtc.uptime > self.sleep_at: self.sleep() gc.collect() else: watch.rtc.update() charging = watch.battery.charging() if watch.button.value() or self.charging != charging: self.wake() def run(self): """Run the system manager synchronously. This allows all watch management activities to handle in the normal execution context meaning any exceptions and other problems can be observed interactively via the console. """ if not self.app: self.switch(self.applications[0]) # Reminder: wasptool uses this string to confirm the device has # been set running again. print('Watch is running, use Ctrl-C to stop') while True: self._tick() # Currently there is no code to control how fast the system # ticks. In other words this code will break if we improve the # power management... we are currently relying on no being able # to stay in the low-power state for very long. machine.deepsleep() system = Manager()