Add an asyncio example with a fancy precomputed qr code

Author: jepler

examples/QR_Blinka_CircuitPythonOrg.bmp

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+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+#
+# SPDX-License-Identifier: CC-BY-SA-4.0

examples/QR_Blinka_CircuitPythonOrg.bmp.license

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+# SPDX-FileCopyrightText: 2022 Jeff Epler for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+# pylint: disable=consider-using-with
+
+import asyncio
+from displayio import TileGrid, OnDiskBitmap, Group
+from rainbowio import colorwheel
+from adafruit_pybadger import pybadger
+
+# If you choose to enter a pronoun it's shown on the "business card" page
+pronoun = ""
+custom_line1 = "FIRST"
+custom_line2 = "LAST"  # also a great place to show a pronoun
+
+# Set up the custom image
+qr_image = OnDiskBitmap(open("/QR_Blinka_CircuitPythonOrg.bmp", "rb"))
+qr_tg = TileGrid(qr_image, pixel_shader=qr_image.pixel_shader)
+qr_gp = Group()
+qr_gp.append(qr_tg)
+
+pybadger.badge_background(
+    background_color=pybadger.WHITE,
+    rectangle_color=pybadger.PURPLE,
+    rectangle_drop=0.25,
+    rectangle_height=0.55,
+)
+
+pybadger.badge_line(
+    text="HELLO I'M", color=pybadger.BLINKA_PURPLE, scale=2, padding_above=1
+)
+pybadger.badge_line(text=custom_line1, color=pybadger.WHITE, scale=6, padding_above=1)
+pybadger.badge_line(
+    text=custom_line2, color=pybadger.BLINKA_PURPLE, scale=2, padding_above=0.25
+)
+
+# Start with the custom badge page
+pybadger.show_custom_badge()
+
+# This task responds to buttons and changes the visible page
+async def ui_task():
+    while True:
+        if pybadger.button.a:
+            pybadger.show_business_card(
+                image_name="Blinka.bmp",
+                name_string="Jeff Epler",
+                name_scale=2,
+                email_string_one="[email protected]",
+                email_string_two=pronoun,
+            )
+        elif pybadger.button.b:
+            pybadger.show(qr_gp)
+        elif pybadger.button.start:
+            pybadger.show_custom_badge()
+        elif pybadger.button.select:
+            pybadger.activity()
+        else:
+            pybadger.auto_dim_display(
+                delay=0.5
+            )  # Remove or comment out this line if you have the PyBadge LC
+        await asyncio.sleep(0.02)
+
+
+# This task animates the LEDs
+async def led_task():
+    pixels = pybadger.pixels
+    pixels.auto_write = False
+    num_pixels = len(pixels)
+    j = 0
+    while True:
+        bright = pybadger.display.brightness > 0.5
+        j = (j + (7 if bright else 3)) & 255
+        b = 31 / 255.0 if bright else 5 / 255.0
+        if pixels.brightness != b:
+            pixels.brightness = b
+        for i in range(num_pixels):
+            rc_index = i * 97 + j
+            pixels[i] = colorwheel(rc_index & 255)
+        pixels.show()
+        await asyncio.sleep(0.02)
+
+
+# Run both tasks via asyncio!
+async def main():
+    await asyncio.gather(ui_task(), led_task())
+
+
+asyncio.run(main())