Merge pull request #14 from prcutler/root-group-fix

Update root_group and fourwire for CP 9 compatibility

Author: dhalbert

README.rst

@@ -71,13 +71,14 @@ Usage Example
     import busio
     import displayio
     import terminalio
+    import fourwire
     from adafruit_display_text import label
     import adafruit_displayio_sh1106
 
     displayio.release_displays()
 
     spi = busio.SPI(board.SCK, board.MOSI)
-    display_bus = displayio.FourWire(
+    display_bus = fourwire.FourWire(
         spi,
         command=board.OLED_DC,
         chip_select=board.OLED_CS,
@@ -92,7 +93,7 @@ Usage Example
 
     # Make the display context
     splash = displayio.Group()
-    display.show(splash)
+    display.root_group = splash
 
     color_bitmap = displayio.Bitmap(WIDTH, HEIGHT, 1)
     color_palette = displayio.Palette(1)

examples/displayio_sh1106_simpletest.py

@@ -6,14 +6,15 @@
 import board
 import busio
 import displayio
+import fourwire
 import terminalio
 from adafruit_display_text import label
 import adafruit_displayio_sh1106
 
 displayio.release_displays()
 
 spi = busio.SPI(board.SCK, board.MOSI)
-display_bus = displayio.FourWire(
+display_bus = fourwire.FourWire(
     spi,
     command=board.OLED_DC,
     chip_select=board.OLED_CS,
@@ -28,7 +29,7 @@
 
 # Make the display context
 splash = displayio.Group()
-display.show(splash)
+display.root_group = splash
 
 color_bitmap = displayio.Bitmap(WIDTH, HEIGHT, 1)
 color_palette = displayio.Palette(1)