tft lcd文字菜单python代码

以下是一个简单的Python代码示例，用于在TFT LCD上显示文本菜单：

import Adafruit_ILI9341 as TFT
import Adafruit_GPIO as GPIO
import Adafruit_GPIO.SPI as SPI
import time

# TFT LCD连接引脚
DC = 18
RST = 23
SPI_PORT = 0
SPI_DEVICE = 0

# 初始化SPI接口和TFT LCD
spi = SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=64000000)
disp = TFT.ILI9341(DC, rst=RST, spi=spi)

# 设置LCD显示参数
disp.begin()
disp.clear()
disp.display()
width = disp.width
height = disp.height
font_size = 24
menu_items = ["Item 1", "Item 2", "Item 3", "Item 4"]
selected_item = 0

# 显示文本菜单
while True:
    # 清除显示
    disp.clear()
    
    # 在屏幕上显示菜单项
    y = int((height - (font_size * len(menu_items))) / 2)
    for i, item in enumerate(menu_items):
        x = int((width - (len(item) * font_size)) / 2)
        if i == selected_item:
            disp.draw_text((x, y), item, font_size, TFT.WHITE)
        else:
            disp.draw_text((x, y), item, font_size, TFT.BLUE)
        y += font_size
    
    # 更新显示
    disp.display()
    
    # 等待用户输入
    time.sleep(0.1)
    if not GPIO.input(27):
        selected_item -= 1
        if selected_item < 0:
            selected_item = len(menu_items) - 1
    elif not GPIO.input(22):
        selected_item += 1
        if selected_item >= len(menu_items):
            selected_item = 0
    elif not GPIO.input(17):
        break

# 清除显示并退出
disp.clear()
disp.display()

请注意，此示例假定您已经安装了Adafruit_ILI9341和Adafruit_GPIO库，并且已将TFT LCD连接到正确的引脚。如果您的硬件配置不同，请相应地更改代码。