feat(clock): add clock app

apps/clock/clock.py

@@ -0,0 +1,43 @@
+import board
+import busio
+import time
+import rtc
+import adafruit_il0373
+import displayio
+from arambadge import badge
+from adafruit_display_shapes.rect import Rect
+
+ASSET_ROOT = '/'.join(__file__.split('/')[:-1])
+ASSET_LIST = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'colon']
+
+class ClockApp:
+    def __init__(self):
+        # Load all assets
+        self.assets = {}
+        for asset in ASSET_LIST:
+            self.assets[asset] = displayio.OnDiskBitmap(open(ASSET_ROOT + '/font/%s.bmp' % asset, 'rb'))
+        self.assets[':'] = self.assets['colon']
+
+    def draw_time(self, dt, x, y):
+        timestr = '%02d:%02d' % (dt.tm_hour, dt.tm_min)
+        group = displayio.Group(max_size=len(timestr), x=x, y=y)
+        xpos = 0
+        for ch in timestr:
+            sprite = displayio.TileGrid(self.assets[ch], x=xpos, pixel_shader=displayio.ColorConverter())
+            group.append(sprite)
+            xpos += self.assets[ch].width + 8
+        return group
+
+    def run(self):
+        display = badge.display
+
+        while True:
+            rtc_instance = rtc.RTC()
+            group = displayio.Group()
+            group.append(Rect(0, 0, display.width, display.height, fill=0xffffff))
+            group.append(self.draw_time(rtc_instance.datetime, 48, 40))
+            display.show(group)
+            while display.time_to_refresh > 0:
+                pass
+            display.refresh()
+            time.sleep(60-time.time()%60)

code.py

@@ -6,6 +6,7 @@
 import time
 import supervisor
 from nametags.nametags import NametagsApp
+from apps.clock.clock import ClockApp
 
 print("AramCon Badge 2020 Firmware")
 
@@ -20,13 +21,17 @@ def i2c_device_available(i2c, addr):
 addon = addons.read_addon_descriptor(e)
 
 nametags = NametagsApp(not addon)
+clock = ClockApp()
 
 while True:
     nametags.update()
     for i in range(4):
         badge.pixels[i] = (255 * badge.left, 255 * badge.up, 255 * badge.right)
     badge.vibration = badge.action
 
+    if badge.down:
+        clock.run()
+
     addon = addons.read_addon_descriptor(e)
     if addon:
         print("Add-on connected: {}".format(addon['name']))