wasp: Add simple clock app

At this point both the simulator and a PineTime will come up
and show a clock (although in the case of the PineTime the clock
will just come up at 12:00).

TODO.md

@@ -17,11 +17,9 @@ to allow a PineTime case to be confidently glued shut.
 ## MicroPython
 
  * [X] Basic board ports (PineTime, DS-D6, 96Boards Nitrogen)
- * [ ] Long press reset (conditional feeding of the watchdog)
+ * [X] Long press reset (conditional feeding of the watchdog)
    - [X] Feed dog from REPL polling loop
-   - [ ] Feed dog from a tick interrupt
+   - [X] Feed dog from a tick interrupt
- * [ ] Basic (WFI) power saving
- * [ ] Implement machine.RTC for nrf52
  
 ## WASP
 
@@ -31,9 +29,11 @@ to allow a PineTime case to be confidently glued shut.
    - [X] RLE coder and decoder
    - [ ] Optimized RLE inner loops
  * [X] Backlight driver
- * [ ] Button driver (interrupt based)
+ * [X] Button driver (polling)
  * [X] Battery/charger driver
  * [ ] Simple clock and battery level application
+ * [X] Basic (WFI) power saving
+ * [X] Implement simple RTC for nrf52
 
 # M2: Great developer experience
 
@@ -58,6 +58,7 @@ applications.
 
 ## WASP
 
+ * [ ] Button driver (interrupt based)
  * [ ] Touch sensor driver
  * [ ] Event driven application framework
  * [ ] Stopwatch app

wasp/boards/pinetime/manifest.py

@@ -1,12 +1,16 @@
 freeze('../..',
     (
         'boot.py',
+        'clock.py',
         'demo.py',
         'drivers/battery.py',
         'drivers/nrf_rtc.py',
         'drivers/signal.py',
         'drivers/st7789.py',
         'drivers/vibrator.py',
+        'fonts.py',
+        'main.py',
+        'manager.py',
         'logo.py',
     ),
     opt=3

wasp/boot.py

@@ -1,10 +1,3 @@
-import logo
+import manager
 import watch
-import time
+wasp = manager.Manager(watch)
-
-# Splash screen
-watch.display.rleblit(logo.pine64, fg=0xffff)
-
-time.sleep(5)
-watch.backlight.set(0)
-watch.display.poweroff()

wasp/clock.py

@@ -0,0 +1,43 @@
+import fonts
+
+DIGITS = (
+        fonts.clock_0,
+        fonts.clock_1,
+        fonts.clock_2,
+        fonts.clock_3,
+        fonts.clock_4,
+        fonts.clock_5,
+        fonts.clock_6,
+        fonts.clock_7,
+        fonts.clock_8,
+        fonts.clock_9
+)
+
+class ClockApp(object):
+
+    def __init__(self):
+        self.on_screen = ( -1, -1 )
+
+    def draw(self, watch):
+        display = watch.display
+
+        display.fill(0)
+        display.rleblit(fonts.clock_colon, pos=(2*48, 80), fg=0xb5b6)
+        self.update(watch)
+
+    def update(self, watch):
+        now = watch.rtc.get_time()
+        if now[0] == self.on_screen[0] and now[1] == self.on_screen[1]:
+            # Avoid the redraw
+            return False
+
+        display = watch.display
+        display.rleblit(DIGITS[now[1]  % 10], pos=(4*48, 80))
+        display.rleblit(DIGITS[now[1] // 10], pos=(3*48, 80), fg=0xc638)
+        display.rleblit(DIGITS[now[0]  % 10], pos=(1*48, 80))
+        display.rleblit(DIGITS[now[0] // 10], pos=(0*48, 80), fg=0xc638)
+        self.on_screen = now
+
+        return True
+
+

wasp/main.py

@@ -1,4 +1 @@
-import machine
+wasp.run()
-
-while True
-    machine.deepsleep()

wasp/manager.py

@@ -0,0 +1,42 @@
+import clock
+import gc
+import machine
+
+class Manager(object):
+    def __init__(self, watch):
+        self.watch = watch
+        self.switch(clock.ClockApp())
+        self.sleep_at = watch.rtc.uptime + 90
+
+    def switch(self, app):
+        self.app = app
+        app.draw(self.watch)
+
+    def tick(self):
+        if self.sleep_at:
+            if self.watch.rtc.update():
+                self.app.update(self.watch)
+
+            if self.watch.button.value():
+                self.sleep_at = self.watch.rtc.uptime + 15
+
+            if self.watch.rtc.uptime > self.sleep_at:
+                self.watch.backlight.set(0)
+                self.watch.display.poweroff()
+                self.sleep_at = None
+        else:
+            self.watch.rtc.update()
+
+            if self.watch.button.value():
+                self.watch.display.poweron()
+                self.app.update(self.watch)
+                self.watch.backlight.set(2)
+
+                self.sleep_at = self.watch.rtc.uptime + 15
+
+        gc.collect()   
+
+    def run(self):
+        while True:
+            self.tick()
+            machine.deepsleep()