wasp: Re-factor how Draw565 is used.

Moving it from applications into the watch is useful for two reasons.
Firstly it means applications don't need to know as much about the
display color depth and secondly it makes it easier to replace the
drawing routines with wasptool.

2 files changed, 20 insertions, 18 deletions

diff --git a/wasp/boards/simulator/display.py b/wasp/boards/simulator/display.py
index 41d9512..3d7d388 100644
--- a/wasp/boards/simulator/display.py
+++ b/wasp/boards/simulator/display.py
@@ -101,7 +101,7 @@ class CST816SSim():
         self.raise_interrupt()
 
     def raise_interrupt(self):
-        print('#INT')
+        pass
 
 sdl2.ext.init()
 window = sdl2.ext.Window("ST7789", size=(WIDTH, HEIGHT))
diff --git a/wasp/boards/simulator/watch.py b/wasp/boards/simulator/watch.py
index 91be914..f38d7a1 100644
--- a/wasp/boards/simulator/watch.py
+++ b/wasp/boards/simulator/watch.py
@@ -3,6 +3,8 @@ def sleep_ms(ms):
     time.sleep(ms / 1000)
 time.sleep_ms = sleep_ms
 
+import draw565
+
 from machine import I2C
 from machine import Pin
 from machine import SPI
@@ -11,30 +13,22 @@ from drivers.cst816s import CST816S
 from drivers.st7789 import ST7789_SPI
 from drivers.vibrator import Vibrator
 
-button = Pin('BUTTON', Pin.IN, quiet=True)
 
 class Backlight(object):
     def __init__(self, level=1):
-        self.set(level)
+        pass
 
     def set(self, level):
+        """Set the simulated backlight level.
+
+        This function contains a subtle trick. As soon as the backlight is
+        turned off (e.g. the watch goes to sleep) then we will simulate
+        a button press in order to turn the watch back on again.
+        """
         print(f'BACKLIGHT: {level}')
 
         button.value(bool(level))
 
-class Display(ST7789_SPI):
-    def __init__(self):
-        spi = SPI(0)
-        # Mode 3, maximum clock speed!
-        spi.init(polarity=1, phase=1, baudrate=8000000)
-    
-        # Configure the display
-        cs = Pin("DISP_CS", Pin.OUT, quiet=True)
-        dc = Pin("DISP_DC", Pin.OUT, quiet=True)
-        rst = Pin("DISP_RST", Pin.OUT, quiet=True)
-
-        super().__init__(240, 240, spi, cs=cs, dc=dc, res=rst)
-
 class Battery(object):
     def __init__(self):
         self.voltage = 3.9
@@ -93,10 +87,18 @@ class RTC(object):
     def get_uptime_ms(self):
         return int(time.time() * 1000)
 
-display = Display()
-touch = CST816S(I2C(0))
 backlight = Backlight()
+spi = SPI(0)
+spi.init(polarity=1, phase=1, baudrate=8000000)
+display = ST7789_SPI(240, 240, spi,
+        cs=Pin("DISP_CS", Pin.OUT, quiet=True),
+        dc=Pin("DISP_DC", Pin.OUT, quiet=True),
+        res=Pin("DISP_RST", Pin.OUT, quiet=True))
+drawable = draw565.Draw565(display)
+
 battery = Battery()
+button = Pin('BUTTON', Pin.IN, quiet=True)
 rtc = RTC()
+touch = CST816S(I2C(0))
 vibrator = Vibrator(Pin('MOTOR', Pin.OUT, value=0), active_low=True)