User Manual

Let's take a look at the sections of code one by one. We start by importing the board so that we can

initialize SPI , displayio , terminalio for the font, a label , and the adafruit_st7789 driver.

"""

This test will initialize the display using displayio and draw a solid green

background, a smaller purple rectangle, and some yellow text.

"""

import board

import displayio

import terminalio

from adafruit_display_text import label

from adafruit_st7789 import ST7789

spi = board.SPI()

while not spi.try_lock():

pass

spi.configure(baudrate=24000000) # Configure SPI for 24MHz

spi.unlock()

tft_cs = board.D5

tft_dc = board.D6

displayio.release_displays()

display_bus = displayio.FourWire(spi, command=tft_dc, chip_select=tft_cs, reset=board.D9)

display = ST7789(display_bus, width=320, height=240, rotation=90)

# Make the display context

splash = displayio.Group(max_size=10)

display.show(splash)

color_bitmap = displayio.Bitmap(320, 240, 1)

color_palette = displayio.Palette(1)

color_palette[0] = 0x00FF00 # Bright Green

bg_sprite = displayio.TileGrid(color_bitmap,

pixel_shader=color_palette,

x=0, y=0)

splash.append(bg_sprite)

# Draw a smaller inner rectangle

inner_bitmap = displayio.Bitmap(280, 200, 1)

inner_palette = displayio.Palette(1)

inner_palette[0] = 0xAA0088 # Purple

inner_sprite = displayio.TileGrid(inner_bitmap,

pixel_shader=inner_palette,

x=20, y=20)

splash.append(inner_sprite)

# Draw a label

text_group = displayio.Group(max_size=10, scale=3, x=57, y=120)

text = "Hello World!"

text_area = label.Label(terminalio.FONT, text=text, color=0xFFFF00)

text_group.append(text_area) # Subgroup for text scaling

splash.append(text_group)

while True:

pass