zpc_ct/scripts/display_test.py

# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

import digitalio
import board

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

# Configuration for CS and DC pins for Raspberry Pi
cs_pin = digitalio.DigitalInOut(board.CE0)
dc_pin = digitalio.DigitalInOut(board.D25)
reset_pin = None
BAUDRATE = 64000000  # The pi can be very fast!
# Create the ST7789 display:
display = st7789.ST7789(
    board.SPI(),
    cs=cs_pin,
    dc=dc_pin,
    rst=reset_pin,
    baudrate=BAUDRATE,
    width=135,
    height=240,
    x_offset=53,
    y_offset=40,
)

backlight = digitalio.DigitalInOut(board.D22)
backlight.switch_to_output()
backlight.value = True
buttonA = digitalio.DigitalInOut(board.D23)
buttonB = digitalio.DigitalInOut(board.D24)
buttonA.switch_to_input()
buttonB.switch_to_input()

# Main loop:
while True:
    if buttonA.value and buttonB.value:
        backlight.value = False  # turn off backlight
    else:
        backlight.value = True  # turn on backlight
    if buttonB.value and not buttonA.value:  # just button A pressed
        display.fill(color565(255, 0, 0))  # red
    if buttonA.value and not buttonB.value:  # just button B pressed
        display.fill(color565(0, 0, 255))  # blue
    if not buttonA.value and not buttonB.value:  # none pressed
        display.fill(color565(0, 255, 0))  # green