Test-128x128-stemma-qt-grayscale.py

Test-128x128-stemma-qt-grayscale.py

# Creates a pusing set of rings under text.
import time
import math
import board
import displayio
import busdisplay
import i2cdisplaybus
import terminalio
from adafruit_display_text import label
import adafruit_ssd1327

# === Release any displays that might already be in use ===
displayio.release_displays()

# === Setup I2C display using STEMMA QT ===
i2c = board.STEMMA_I2C()  # Uses default I2C pins for QT Py RP2040

display_bus = i2cdisplaybus.I2CDisplayBus(i2c, device_address=0x3D)

WIDTH = 128
HEIGHT = 128

# === Initialize the SSD1327 OLED Display ===
display = adafruit_ssd1327.SSD1327(
    display_bus, width=WIDTH, height=HEIGHT, rotation=0
)

# === Create the main display group ===
main_group = displayio.Group()
display.root_group = main_group

# === Add a text label with the display name ===
title = label.Label(
    terminalio.FONT,
    text="Adafruit 1.5in Grayscale OLED",
    scale=1,
    x=5,
    y=10,
)
main_group.append(title)

# === Create a 64x64 bitmap and grayscale palette ===
size = 64
bitmap = displayio.Bitmap(size, size, 256)
palette = displayio.Palette(256)
for i in range(256):
    palette[i] = (i << 16) | (i << 8) | i  # Grayscale color ramp

tile = displayio.TileGrid(
    bitmap,
    pixel_shader=palette,
    x=(WIDTH - size) // 2,
    y=(HEIGHT - size) // 2 + 16
)
main_group.append(tile)

# === Function to animate a grayscale pulse ===
def animate_pulse(frame):
    for y in range(size):
        for x in range(size):
            dx = x - size // 2
            dy = y - size // 2
            dist = math.sqrt(dx * dx + dy * dy)
            brightness = int(127 + 127 * math.sin(dist / 3 - frame / 5)) % 256
            bitmap[x, y] = brightness

# === Main loop ===
frame = 0
while True:
    animate_pulse(frame)
    frame += 2