1  """
 2  This test will initialize the display using displayio and draw a solid green
 3  background, a smaller purple rectangle, and some yellow text.
 4  """
 5  
 6  import board
 7  import terminalio
 8  import displayio
 9  from adafruit_display_text import label
10  from adafruit_hx8357 import HX8357
11  
12  # Release any resources currently in use for the displays
13  displayio.release_displays()
14  
15  spi = board.SPI()
16  tft_cs = board.CE0
17  tft_dc = board.D25
18  
19  display_bus = displayio.FourWire(spi, command=tft_dc, chip_select=tft_cs)
20  
21  display = HX8357(display_bus, width=480, height=320)
22  
23  # Make the display context
24  splash = displayio.Group(max_size=10)
25  display.show(splash)
26  
27  color_bitmap = displayio.Bitmap(display.width, display.height, 1)
28  color_palette = displayio.Palette(1)
29  color_palette[0] = 0x00FF00  # Bright Green
30  
31  bg_sprite = displayio.TileGrid(color_bitmap, pixel_shader=color_palette, x=0, y=0)
32  splash.append(bg_sprite)
33  
34  # Draw a smaller inner rectangle
35  inner_bitmap = displayio.Bitmap(display.width - 40, display.height - 40, 1)
36  inner_palette = displayio.Palette(1)
37  inner_palette[0] = 0xAA0088  # Purple
38  inner_sprite = displayio.TileGrid(inner_bitmap, pixel_shader=inner_palette, x=20, y=20)
39  splash.append(inner_sprite)
40  
41  # Draw a label
42  text_group = displayio.Group(max_size=10, scale=3, x=137, y=160)
43  text = "Hello World!"
44  text_area = label.Label(terminalio.FONT, text=text, color=0xFFFF00)
45  text_group.append(text_area)  # Subgroup for text scaling
46  splash.append(text_group)
47  
48  while True:
49      pass