NeoPixel Cufflink CircuitPython Code

first commit

NeoPixel_Novelty_Cufflinks/README.md

@@ -0,0 +1,6 @@
+# NeoPixel Novelty Cufflinks
+
+CircuitPython Code for Cufflinks with scrolling text that chooses a random string to display and a heart icon. Built on the QT Py RP2040 with the NeoPixel 5x5 BFF attached.
+
+Tutorial at https://learn.adafruit.com/neopixel-novelty-cufflinks-with-scrolling-text/overview
+

NeoPixel_Novelty_Cufflinks/code.py

@@ -0,0 +1,84 @@
+# SPDX-FileCopyrightText: Copyright (c) 2023 Erin St. Blaine for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+import time
+from random import randint
+import board
+import neopixel
+import fontio
+from adafruit_display_text.bitmap_label import Label
+from adafruit_bitmap_font import bitmap_font
+from displayio import Bitmap
+from rainbowio import colorwheel
+
+tom_thumb = bitmap_font.load_font("tom-thumb.pcf", Bitmap)
+
+_glyph_keys = ['bitmap', 'tile_index', 'width', 'height', 'dx', 'dy', 'shift_x', 'shift_y']
+def patch_glyph(base, **kw):
+    d = {}
+    for k in _glyph_keys:
+        d[k] = kw.get(k, getattr(base, k))
+    return fontio.Glyph(**d)
+
+class PatchedFont:
+    def __init__(self, base_font, patches):
+        self.base_font = base_font
+        self.patches = patches
+
+    def get_glyph(self, glyph):
+        g = self.base_font.get_glyph(glyph)
+        patch = self.patches.get(glyph)
+        if patch is not None:
+            # print("patching", repr(chr(glyph)), g)
+            g = patch_glyph(g, **patch)
+            # print("patched", g)
+        return g
+
+    def get_bounding_box(self):
+        return self.base_font.get_bounding_box()
+
+font = PatchedFont(tom_thumb,
+                   {32: {'shift_x': 1, 'dx': 0},
+                    105: {'dx': 0, 'shift_x': 2},
+                    33: {'dx': 0, 'shift_x': 2},
+                    })
+
+# List of text strings
+text_strings = ["     love bun     ", "     dear me     ", "     my bear     ",
+                "     my my     ", "     you are babe     "]
+# Create a label object
+label = Label(text="text", font=font)
+bitmap = label.bitmap
+heart_bitmap = [
+    0, 1, 1, 0, 0,
+    1, 1, 1, 1, 0,
+    0, 1, 1, 1, 1,
+    1, 1, 1, 1, 0,
+    0, 1, 1, 0, 0
+]
+pixels = neopixel.NeoPixel(board.A1, 5*5, brightness=.08, auto_write=False)
+while True:
+    for hue in range(0, 255, 3):
+        color = colorwheel(hue)
+        pixels[:] = [pixel * color for pixel in heart_bitmap]
+        pixels.show()
+        time.sleep(.05)
+    hue = 0
+    string_index = randint(0, 4)
+    label.text = text_strings[string_index]
+    bitmap = label.bitmap
+    print(string_index)
+    for i in range(bitmap.width):
+        # Use a rainbow of colors, shifting each column of pixels
+        hue = hue + 7
+        if hue >= 256:
+            hue = hue - 256
+        color = colorwheel(hue)
+        # Scoot the old text left by 1 pixel
+        pixels[:20] = pixels[5:]
+        # Draw in the next line of text
+        for y in range(5):
+            # Select black or color depending on the bitmap pixel
+            pixels[20+y] = color * bitmap[i,y]
+        pixels.show()
+        time.sleep(.2)