Simple test

Ensure your device works with this simple test.

examples/ssd1327_simpletest.py
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# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

import board
import displayio
import terminalio
from adafruit_display_text import label
import adafruit_ssd1327

displayio.release_displays()

# Use for I2C
i2c = board.I2C()
display_bus = displayio.I2CDisplay(i2c, device_address=0x3D)

# Use for SPI
# spi = board.SPI()
# oled_cs = board.D5
# oled_dc = board.D6
# display_bus = displayio.FourWire(
#    spi, command=oled_dc, chip_select=oled_cs, baudrate=1000000, reset=board.D9
# )

WIDTH = 128
HEIGHT = 128
BORDER = 8
FONTSCALE = 1

display = adafruit_ssd1327.SSD1327(display_bus, width=WIDTH, height=HEIGHT)

# Make the display context
splash = displayio.Group()
display.show(splash)

# Draw a background rectangle, but not the full display size
color_bitmap = displayio.Bitmap(
    display.width - BORDER * 2, display.height - BORDER * 2, 1
)
color_palette = displayio.Palette(1)
color_palette[0] = 0xFFFFFF  # White
bg_sprite = displayio.TileGrid(
    color_bitmap, pixel_shader=color_palette, x=BORDER, y=BORDER
)
splash.append(bg_sprite)

# Draw a smaller inner rectangle
inner_bitmap = displayio.Bitmap(
    display.width - BORDER * 4, display.height - BORDER * 4, 1
)
inner_palette = displayio.Palette(1)
inner_palette[0] = 0x888888  # Gray
inner_sprite = displayio.TileGrid(
    inner_bitmap, pixel_shader=inner_palette, x=BORDER * 2, y=BORDER * 2
)
splash.append(inner_sprite)

# Draw a label
text = "Hello World!"
text_area = label.Label(terminalio.FONT, text=text, color=0xFFFFFF)
text_width = text_area.bounding_box[2] * FONTSCALE
text_group = displayio.Group(
    scale=FONTSCALE,
    x=display.width // 2 - text_width // 2,
    y=display.height // 2,
)
text_group.append(text_area)  # Subgroup for text scaling
splash.append(text_group)

while True:
    pass

Gamma test

Ensure your device works with this simple test.

examples/ssd1327_gamma.py
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# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

import time
import board
import displayio
import adafruit_ssd1327

displayio.release_displays()

# Use for I2C
i2c = board.I2C()
display_bus = displayio.I2CDisplay(i2c, device_address=0x3D)

# Use for SPI
# spi = board.SPI()
# oled_cs = board.D5
# oled_dc = board.D6
# display_bus = displayio.FourWire(
#    spi, command=oled_dc, chip_select=oled_cs, baudrate=1000000, reset=board.D9
# )


time.sleep(1)
display = adafruit_ssd1327.SSD1327(display_bus, width=128, height=128)

g = displayio.Group()
dimension = min(display.width, display.height)
color_count = 16
gamma_pattern = displayio.Bitmap(dimension, dimension, color_count)
gamma_palette = displayio.Palette(color_count)
t = displayio.TileGrid(gamma_pattern, pixel_shader=gamma_palette)

pixels_per_step = dimension // color_count

for i in range(dimension):
    if i % pixels_per_step == 0:
        continue
    gamma_pattern[i, i] = i // pixels_per_step

for i in range(color_count):
    component = i * 255 // (color_count - 1)
    print(component)
    gamma_palette[i] = component << 16 | component << 8 | component

g.append(t)

display.show(g)

time.sleep(10)