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  import board
 6  import terminalio
 7  import displayio
 8  from adafruit_display_text import label
 9  from adafruit_st7789 import ST7789
10  
11  # First set some parameters used for shapes and text
12  BORDER = 20
13  FONTSCALE = 2
14  BACKGROUND_COLOR = 0x00FF00  # Bright Green
15  FOREGROUND_COLOR = 0xAA0088  # Purple
16  TEXT_COLOR = 0xFFFF00
17  
18  # Release any resources currently in use for the displays
19  displayio.release_displays()
20  
21  spi = board.SPI()
22  tft_cs = board.D5
23  tft_dc = board.D6
24  
25  display_bus = displayio.FourWire(spi, command=tft_dc, chip_select=tft_cs)
26  display = ST7789(
27      display_bus, rotation=270, width=240, height=135, rowstart=40, colstart=53
28  )
29  
30  # Make the display context
31  splash = displayio.Group(max_size=10)
32  display.show(splash)
33  
34  color_bitmap = displayio.Bitmap(display.width, display.height, 1)
35  color_palette = displayio.Palette(1)
36  color_palette[0] = BACKGROUND_COLOR
37  
38  bg_sprite = displayio.TileGrid(color_bitmap, pixel_shader=color_palette, x=0, y=0)
39  splash.append(bg_sprite)
40  
41  # Draw a smaller inner rectangle
42  inner_bitmap = displayio.Bitmap(
43      display.width - BORDER * 2, display.height - BORDER * 2, 1
44  )
45  inner_palette = displayio.Palette(1)
46  inner_palette[0] = FOREGROUND_COLOR
47  inner_sprite = displayio.TileGrid(
48      inner_bitmap, pixel_shader=inner_palette, x=BORDER, y=BORDER
49  )
50  splash.append(inner_sprite)
51  
52  # Draw a label
53  text = "Hello World!"
54  text_area = label.Label(terminalio.FONT, text=text, color=TEXT_COLOR)
55  text_width = text_area.bounding_box[2] * FONTSCALE
56  text_group = displayio.Group(
57      max_size=10,
58      scale=FONTSCALE,
59      x=display.width // 2 - text_width // 2,
60      y=display.height // 2,
61  )
62  text_group.append(text_area)  # Subgroup for text scaling
63  splash.append(text_group)
64  
65  while True:
66      pass