qrcode: Basic MicroPython example for PicoDisplay

micropython/examples/pico_display/basic_qrcode.py

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+import picodisplay as display  # Comment this line out to use PicoDisplay2
+# import picodisplay2 as display  # Uncomment this line to use PicoDisplay2
+import qrcode
+
+
+def measure_qr_code(size, code):
+    w, h = code.get_size()
+    module_size = int(size / w)
+    return module_size * w, module_size
+
+
+def draw_qr_code(ox, oy, size, code):
+    size, module_size = measure_qr_code(size, code)
+    display.set_pen(128, 128, 128)
+    display.rectangle(ox, oy, size, size)
+    display.set_pen(0, 0, 0)
+    for x in range(size):
+        for y in range(size):
+            if code.get_module(x, y):
+                display.rectangle(ox + x * module_size, oy + y * module_size, module_size, module_size)
+
+
+width = display.get_width()
+height = display.get_height()
+
+code = qrcode.QRCode()
+code.set_text("shop.pimoroni.com")
+
+display.init(bytearray(width * height * 2))
+
+display.set_pen(128, 128, 128)
+display.clear()
+display.set_pen(0, 0, 0)
+
+size, module_size = measure_qr_code(height, code)
+left = int((width // 2) - (size // 2))
+top = int((height // 2) - (size // 2))
+draw_qr_code(left, top, height, code)
+
+display.update()
+
+while True:
+    pass