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• Adafruit RGB_Display Library

Simple test — Adafruit RGB_Display Library 1.0 documentation

Ensure your device works with this simple test.

 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4# Quick test of TFT FeatherWing (ST7789) with Feather M0 or M4
 5# This will work even on a device running displayio
 6# Will fill the TFT black and put a red pixel in the center, wait 2 seconds,
 7# then fill the screen blue (with no pixel), wait 2 seconds, and repeat.
 8import random
 9import time
10
11import board
12import digitalio
13
14from adafruit_rgb_display import st7789
15from adafruit_rgb_display.rgb import color565
16
17# Configuratoin for CS and DC pins (these are FeatherWing defaults on M0/M4):
18cs_pin = digitalio.DigitalInOut(board.D5)
19dc_pin = digitalio.DigitalInOut(board.D6)
20reset_pin = digitalio.DigitalInOut(board.D9)
21
22# Config for display baudrate (default max is 24mhz):
23BAUDRATE = 24000000
24
25# Setup SPI bus using hardware SPI:
26spi = board.SPI()
27
28# Create the ST7789 display:
29display = st7789.ST7789(spi, cs=cs_pin, dc=dc_pin, rst=reset_pin, baudrate=BAUDRATE)
30
31# Main loop:
32while True:
33    # Fill the screen red, green, blue, then black:
34    for color in ((255, 0, 0), (0, 255, 0), (0, 0, 255)):
35        display.fill(color565(color))
36    # Clear the display
37    display.fill(0)
38    # Draw a red pixel in the center.
39    display.pixel(display.width // 2, display.height // 2, color565(255, 0, 0))
40    # Pause 2 seconds.
41    time.sleep(2)
42    # Clear the screen a random color
43    display.fill(color565(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)))
44    # Pause 2 seconds.
45    time.sleep(2)

 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4# Quick test of TFT FeatherWing (ILI9341) with Feather M0 or M4
 5# Will fill the TFT black and put a red pixel in the center, wait 2 seconds,
 6# then fill the screen blue (with no pixel), wait 2 seconds, and repeat.
 7import random
 8import time
 9
10import board
11import busio
12import digitalio
13
14from adafruit_rgb_display import ili9341
15from adafruit_rgb_display.rgb import color565
16
17# Configuratoin for CS and DC pins (these are FeatherWing defaults on M0/M4):
18cs_pin = digitalio.DigitalInOut(board.D9)
19dc_pin = digitalio.DigitalInOut(board.D10)
20
21# Config for display baudrate (default max is 24mhz):
22BAUDRATE = 24000000
23
24# Setup SPI bus using hardware SPI:
25spi = busio.SPI(clock=board.SCK, MOSI=board.MOSI, MISO=board.MISO)
26
27# Create the ILI9341 display:
28display = ili9341.ILI9341(spi, cs=cs_pin, dc=dc_pin, baudrate=BAUDRATE)
29
30# Main loop:
31while True:
32    # Fill the screen red, green, blue, then black:
33    for color in ((255, 0, 0), (0, 255, 0), (0, 0, 255)):
34        display.fill(color565(color))
35    # Clear the display
36    display.fill(0)
37    # Draw a red pixel in the center.
38    display.pixel(display.width // 2, display.height // 2, color565(255, 0, 0))
39    # Pause 2 seconds.
40    time.sleep(2)
41    # Clear the screen a random color
42    display.fill(color565(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)))
43    # Pause 2 seconds.
44    time.sleep(2)

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