Simple test

Ensure your device works with this simple test.

examples/ssd1325_simpletest.py
 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4"""
 5This test will initialize the display using displayio and draw a solid white
 6background, a smaller black rectangle, and some white text.
 7"""
 8
 9import board
10import displayio
11import terminalio
12from adafruit_display_text import label
13from fourwire import FourWire
14
15# Use for I2C
16from i2cdisplaybus import I2CDisplayBus
17
18import adafruit_ssd1325
19
20displayio.release_displays()
21
22# Use for SPI
23spi = board.SPI()
24oled_cs = board.D5
25oled_dc = board.D6
26display_bus = FourWire(spi, command=oled_dc, chip_select=oled_cs, baudrate=1000000, reset=board.D9)
27
28# Use for I2C
29# i2c = board.I2C()  # uses board.SCL and board.SDA
30# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
31# display_bus = I2CDisplayBus(i2c, device_address=0x3c)
32
33WIDTH = 128
34HEIGHT = 64
35BORDER = 8
36FONTSCALE = 1
37
38display = adafruit_ssd1325.SSD1325(display_bus, width=WIDTH, height=HEIGHT)
39
40# Make the display context
41splash = displayio.Group()
42display.root_group = splash
43
44color_bitmap = displayio.Bitmap(display.width, display.height, 1)
45color_palette = displayio.Palette(1)
46color_palette[0] = 0xFFFFFF  # White
47
48bg_sprite = displayio.TileGrid(color_bitmap, pixel_shader=color_palette, x=0, y=0)
49splash.append(bg_sprite)
50
51# Draw a smaller inner rectangle
52inner_bitmap = displayio.Bitmap(display.width - BORDER * 2, display.height - BORDER * 2, 1)
53inner_palette = displayio.Palette(1)
54inner_palette[0] = 0x000000  # Black
55inner_sprite = displayio.TileGrid(inner_bitmap, pixel_shader=inner_palette, x=BORDER, y=BORDER)
56splash.append(inner_sprite)
57
58# Draw a label
59text = "Hello World!"
60text_area = label.Label(terminalio.FONT, text=text, color=0x888888)
61text_width = text_area.bounding_box[2] * FONTSCALE
62text_group = displayio.Group(
63    scale=FONTSCALE,
64    x=display.width // 2 - text_width // 2,
65    y=display.height // 2,
66)
67text_group.append(text_area)  # Subgroup for text scaling
68splash.append(text_group)
69
70while True:
71    pass