use setup_display.py instead of boot.py for display init

PiCowbell_HSTX_DVI_Examples/boot.py

@@ -1,21 +0,0 @@
-# SPDX-FileCopyrightText: 2025 Tim Cocks for Adafruit Industries
-#
-# SPDX-License-Identifier: MIT
-import supervisor
-import displayio
-import picodvi
-import framebufferio
-import board
-
-displayio.release_displays()
-fb = picodvi.Framebuffer(320, 240,
-    clk_dp=board.GP14, clk_dn=board.GP15,
-    red_dp=board.GP12, red_dn=board.GP13,
-    green_dp=board.GP18, green_dn=board.GP19,
-    blue_dp=board.GP16, blue_dn=board.GP17,
-    color_depth=8)
-display = framebufferio.FramebufferDisplay(fb)
-
-# set the display onto supervisor.runtime,
-# so it will be available to code.py
-supervisor.runtime.display = display

PiCowbell_HSTX_DVI_Examples/code.py

@@ -1,3 +1,4 @@
+# SPDX-FileCopyrightText: 2025 Tim Cocks for Adafruit Industries
 # SPDX-FileCopyrightText: 2023 Liz Clark for Adafruit Industries
 # SPDX-FileCopyrightText: Adapted from Phil B.'s 16bit_hello Arduino Code
 #
@@ -12,6 +13,7 @@ import vectorio
 import terminalio
 import supervisor
 import simpleio
+from setup_display import setup_display
 from adafruit_bitmap_font import bitmap_font
 from adafruit_display_text import label, wrap_text_to_lines
 from adafruit_display_shapes.rect import Rect
@@ -20,7 +22,7 @@ from adafruit_display_shapes.roundrect import RoundRect
 from adafruit_display_shapes.triangle import Triangle
 from adafruit_display_shapes.line import Line
 
-# see boot.py for display initialization
+setup_display()
 display = supervisor.runtime.display
 
 bitmap = displayio.Bitmap(display.width, display.height, 3)

PiCowbell_HSTX_DVI_Examples/setup_display.py

@@ -0,0 +1,24 @@
+# SPDX-FileCopyrightText: 2025 Tim Cocks for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+import supervisor
+import displayio
+import picodvi
+import framebufferio
+import board
+
+def setup_display():
+    # Skip if the display is already initialized
+    if supervisor.runtime.display is None:
+        displayio.release_displays()
+        fb = picodvi.Framebuffer(320, 240,
+            clk_dp=board.GP14, clk_dn=board.GP15,
+            red_dp=board.GP12, red_dn=board.GP13,
+            green_dp=board.GP18, green_dn=board.GP19,
+            blue_dp=board.GP16, blue_dn=board.GP17,
+            color_depth=8)
+        display = framebufferio.FramebufferDisplay(fb)
+
+        # set the display onto supervisor.runtime,
+        # so it will be available to code.py
+        supervisor.runtime.display = display