examples/lcd.py

   1 #!/usr/bin/env python
   2
   3 import ST7735
   4 from PIL import Image, ImageDraw, ImageFont
   5
   6 print("""lcd.py - Hello, World! example on the 0.96" LCD.
   7
   8 Press Ctrl+C to exit!
   9
  10 """)
  11
  12 # Create LCD class instance.
  13 disp = ST7735.ST7735(
  14     port=0,
  15     cs=1,
  16     dc=9,
  17     backlight=12,
  18     rotation=270,
  19     spi_speed_hz=10000000
  20 )
  21
  22 # Initialize display.
  23 disp.begin()
  24
  25 # Width and height to calculate text position.
  26 WIDTH = disp.width
  27 HEIGHT = disp.height
  28
  29 # New canvas to draw on.
  30 img = Image.new('RGB', (WIDTH, HEIGHT), color=(0, 0, 0))
  31 draw = ImageDraw.Draw(img)
  32
  33 # Text settings.
  34 font_size = 25
  35 font = ImageFont.truetype("fonts/Asap/Asap-Bold.ttf", font_size)
  36 text_colour = (255, 255, 255)
  37 back_colour = (0, 170, 170)
  38
  39 message = "Hello, World!"
  40 size_x, size_y = draw.textsize(message, font)
  41
  42 # Calculate text position
  43 x = (WIDTH - size_x) / 2
  44 y = (HEIGHT / 2) - (size_y / 2)
  45
  46 # Draw background rectangle and write text.
  47 draw.rectangle((0, 0, 160, 80), back_colour)
  48 draw.text((x, y), message, font=font, fill=text_colour)
  49 disp.display(img)
  50
  51 # Keep running.
  52 try:
  53     while True:
  54         pass
  55
  56 # Turn off backlight on control-c
  57 except KeyboardInterrupt:
  58     disp.set_backlight(0)