Simple test

Ensure your device works with this simple test.

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

# Quick test of TFT FeatherWing (ST7789) with Feather M0 or M4
# This will work even on a device running displayio
# Will fill the TFT black and put a red pixel in the center, wait 2 seconds,
# then fill the screen blue (with no pixel), wait 2 seconds, and repeat.
import time
import random
import digitalio
import board

from adafruit_rgb_display.rgb import color565
import adafruit_rgb_display.st7789 as st7789

# Configuratoin for CS and DC pins (these are FeatherWing defaults on M0/M4):
cs_pin = digitalio.DigitalInOut(board.D5)
dc_pin = digitalio.DigitalInOut(board.D6)
reset_pin = digitalio.DigitalInOut(board.D9)

# Config for display baudrate (default max is 24mhz):
BAUDRATE = 24000000

# Setup SPI bus using hardware SPI:
spi = board.SPI()

# Create the ST7789 display:
display = st7789.ST7789(spi, cs=cs_pin, dc=dc_pin, rst=reset_pin, baudrate=BAUDRATE)

# Main loop:
while True:
    # Fill the screen red, green, blue, then black:
    for color in ((255, 0, 0), (0, 255, 0), (0, 0, 255)):
        display.fill(color565(color))
    # Clear the display
    display.fill(0)
    # Draw a red pixel in the center.
    display.pixel(display.width // 2, display.height // 2, color565(255, 0, 0))
    # Pause 2 seconds.
    time.sleep(2)
    # Clear the screen a random color
    display.fill(
        color565(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
    )
    # Pause 2 seconds.
    time.sleep(2)
examples/rgb_display_ili9341test.py
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# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

# Quick test of TFT FeatherWing (ILI9341) with Feather M0 or M4
# Will fill the TFT black and put a red pixel in the center, wait 2 seconds,
# then fill the screen blue (with no pixel), wait 2 seconds, and repeat.
import time
import random
import busio
import digitalio
import board

from adafruit_rgb_display.rgb import color565
import adafruit_rgb_display.ili9341 as ili9341


# Configuratoin for CS and DC pins (these are FeatherWing defaults on M0/M4):
cs_pin = digitalio.DigitalInOut(board.D9)
dc_pin = digitalio.DigitalInOut(board.D10)

# Config for display baudrate (default max is 24mhz):
BAUDRATE = 24000000

# Setup SPI bus using hardware SPI:
spi = busio.SPI(clock=board.SCK, MOSI=board.MOSI, MISO=board.MISO)

# Create the ILI9341 display:
display = ili9341.ILI9341(spi, cs=cs_pin, dc=dc_pin, baudrate=BAUDRATE)

# Main loop:
while True:
    # Fill the screen red, green, blue, then black:
    for color in ((255, 0, 0), (0, 255, 0), (0, 0, 255)):
        display.fill(color565(color))
    # Clear the display
    display.fill(0)
    # Draw a red pixel in the center.
    display.pixel(display.width // 2, display.height // 2, color565(255, 0, 0))
    # Pause 2 seconds.
    time.sleep(2)
    # Clear the screen a random color
    display.fill(
        color565(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
    )
    # Pause 2 seconds.
    time.sleep(2)