Initial AMS Demo Code

Author: makermelissa

CPB_AMS_Gizmo_BLE/cpb_ams_gizmo_ble.py

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+"""
+This example solicits that apple devices that provide notifications connect to it, initiates
+pairing, prints existing notifications and then prints any new ones as they arrive.
+"""
+
+import time
+import displayio
+import terminalio
+from adafruit_gizmo import tft_gizmo
+from adafruit_display_text.label import Label
+from adafruit_display_shapes.rect import Rect
+from adafruit_bitmap_font import bitmap_font
+import adafruit_ble
+from adafruit_ble.advertising.standard import SolicitServicesAdvertisement
+from adafruit_ble_apple_media import AppleMediaService
+from adafruit_circuitplayground import cp
+
+BACKGROUND_COLOR = 0x444444 # Gray
+TEXT_COLOR = 0xFF0000 # Red
+BORDER_COLOR = 0xAAAAAA # Light Gray
+STATUS_COLOR = BORDER_COLOR
+
+# PyLint can't find BLERadio for some reason so special case it here.
+radio = adafruit_ble.BLERadio() # pylint: disable=no-member
+a = SolicitServicesAdvertisement()
+a.solicited_services.append(AppleMediaService)
+radio.start_advertising(a)
+
+def wrap_in_tilegrid(open_file):
+    odb = displayio.OnDiskBitmap(open_file)
+    return displayio.TileGrid(odb, pixel_shader=displayio.ColorConverter())
+
+def make_background(width, height, color):
+    color_bitmap = displayio.Bitmap(width, height, 1)
+    color_palette = displayio.Palette(1)
+    color_palette[0] = color
+
+    return displayio.TileGrid(color_bitmap,
+                              pixel_shader=color_palette,
+                              x=0, y=0)
+
+def load_font(fontname, text):
+    font = bitmap_font.load_font(fontname)
+    font.load_glyphs(text.encode('utf-8'))
+    return font
+
+def make_label(text, x, y, color, font=terminalio.FONT):
+    if isinstance(font, str):
+        font = load_font(font, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.,?")
+    text_area = Label(font, text=text, color=color, max_glyphs=30)
+    text_area.x = x
+    text_area.y = y
+    return text_area
+
+display = tft_gizmo.TFT_Gizmo()
+group = displayio.Group(max_size=20)
+display.show(group)
+
+while True:
+    if not radio.connected:
+        group.append(wrap_in_tilegrid(open("/graphic_tfts_ams_connect.bmp", "rb")))
+
+        while not radio.connected:
+            pass
+
+        group.pop()
+    print("connected")
+
+    known_notifications = set()
+
+    # Draw the text fields
+    print("Loading Font Glyphs...")
+    title_label = make_label("None", 20, 20, TEXT_COLOR, font="/fonts/Arial-Bold-18.bdf")
+    artist_label = make_label("None", 20, 50, TEXT_COLOR, font="/fonts/Arial-16.bdf")
+    album_label = make_label("None", 20, 180, TEXT_COLOR, font="/fonts/Arial-16.bdf")
+    status_label = make_label("None", 80, 220, STATUS_COLOR, font="/fonts/Arial-16.bdf")
+    group.append(make_background(240, 240, BACKGROUND_COLOR))
+    border = Rect(10, 8, 200, 190, outline=BORDER_COLOR, stroke=1)
+    group.append(title_label)
+    group.append(artist_label)
+    group.append(album_label)
+    group.append(status_label)
+    group.append(border)
+
+    while radio.connected:
+        try:
+            for connection in radio.connections:
+                if not connection.paired:
+                    connection.pair()
+                    print("paired")
+
+                ams = connection[AppleMediaService]
+                title_label.text = "{}".format(ams.title)
+                album_label.text = "{}".format(ams.album)
+                artist_label.text = "{}".format(ams.artist)
+                if ams.playing:
+                    status_label.text = "Playing on {}".format(ams.player_name)
+                elif ams.paused:
+                    status_label.text = "Paused on {}".format(ams.player_name)
+            if cp.button_a:
+                ams.toggle_play_pause()
+                time.sleep(0.1)
+
+            if cp.button_b:
+                if cp.switch:
+                    ams.previous_track()
+                else:
+                    ams.next_track()
+                time.sleep(0.1)
+        except RuntimeError:
+            # Skip Bad Packets, unknown commands, etc.
+            pass
+
+    print("disconnected")
+    # Remove all layers
+    while group.__len__():
+        group.pop()