ESP32使用MicroPython开发贪吃蛇游戏

前面我们讲了在ESP32开发板上开发贪吃蛇游戏，用的是Arduino环境。本篇介绍下怎么在MicroPython下开发这个游戏。

在ESP32开发板上使用Micropython开发贪吃蛇游戏，需要控制相关的外设，包括液晶显示器、按键控制等来实现游戏逻辑。

下面是一个简单的贪吃蛇游戏的代码，可以供参考：

# 导入必要的模块
import machine
from machine import Pin, SPI
import time
import ili934xnew
from ili934xnew import color565

# 设置引脚和其他常量
TFT_CLK_PIN = 18
TFT_MOSI_PIN = 23
TFT_CS_PIN = 27
TFT_DC_PIN = 26
TFT_RST_PIN = 5

BUTTON_UP_PIN = 34
BUTTON_DOWN_PIN = 35
BUTTON_LEFT_PIN = 32
BUTTON_RIGHT_PIN = 33

WIDTH = 320
HEIGHT = 240

# 初始化TFT显示器
spi = SPI(1, baudrate=40000000, polarity=0, phase=0, sck=Pin(TFT_CLK_PIN), mosi=Pin(TFT_MOSI_PIN))
tft = ili934xnew.ILI9341(spi, cs=Pin(TFT_CS_PIN), dc=Pin(TFT_DC_PIN), rst=Pin(TFT_RST_PIN))
tft.fill(color565(0, 0, 0))

# 初始化按键
button_up = Pin(BUTTON_UP_PIN, Pin.IN, Pin.PULL_DOWN)
button_down = Pin(BUTTON_DOWN_PIN, Pin.IN, Pin.PULL_DOWN)
button_left = Pin(BUTTON_LEFT_PIN, Pin.IN, Pin.PULL_DOWN)
button_right = Pin(BUTTON_RIGHT_PIN, Pin.IN, Pin.PULL_DOWN)

# 定义贪吃蛇类
class Snake:
    def __init__(self, x=WIDTH/2, y=HEIGHT/2, length=2):
        self.length = length
        self.head = [x, y]
        self.body = []
        self.direction = 'up'

        for i in range(length - 1):
            y += 10
            self.body.append([x, y])

    def move(self):
        if self.direction == 'up':
            self.head[1] -= 10
        elif self.direction == 'down':
            self.head[1] += 10
        elif self.direction == 'left':
            self.head[0] -= 10
        elif self.direction == 'right':
            self.head[0] += 10

        self.body.insert(0, self.head.copy())

        if len(self.body) > self.length:
            del self.body[-1]

    def change_direction(self, direction):
        if direction != self.direction:
            if direction == 'up' and self.direction != 'down':
                self.direction = direction
            elif direction == 'down' and self.direction != 'up':
                self.direction = direction
            elif direction == 'left' and self.direction != 'right':
                self.direction = direction
            elif direction == 'right' and self.direction != 'left':
                self.direction = direction

# 定义食物类
class Food:
    def __init__(self):
        self.x = 0
        self.y = 0

    def generate(self):
        self.x = int(random.randint(0, WIDTH) / 10) * 10
        self.y = int(random.randint(0, HEIGHT) / 10) * 10

    def draw(self):
        tft.fill_rect(self.x, self.y, 10, 10, color565(255, 0, 0))

# 初始化游戏
snake = Snake()
food = Food()
food.generate()

# 游戏循环
while True:
    # 检测按键
    if button_up.value():
        snake.change_direction('up')
    elif button_down.value():
        snake.change_direction('down')
    elif button_left.value():
        snake.change_direction('left')
    elif button_right.value():
        snake.change_direction('right')

    # 移动贪吃蛇并检查是否吃到食物
    snake.move()

    if snake.head[0] == food.x and snake.head[1] == food.y:
        snake.length += 1
        food.generate()

    # 检查贪吃蛇是否碰到墙壁或自己的身体
    if snake.head[0] < 0 or snake.head[0] >= WIDTH or snake.head[1] < 0 or snake.head[1] >= HEIGHT:
        break

    for p in snake.body:
        if p == snake.head:
            continue

        if snake.head[0] == p[0] and snake.head[1] == p[1]:
            break

    # 清空屏幕并重绘贪吃蛇和食物
    tft.fill(color565(0, 0, 0))

    for p in snake.body:
        tft.fill_rect(p[0], p[1], 10, 10, color565(255, 255, 0))

    tft.fill_rect(snake.head[0], snake.head[1], 10, 10, color565(0, 255, 0))

    food.draw()

    # 等待一定时间
    time.sleep(0.2)

# 游戏结束
tft.fill(color565(255, 0, 0))
tft.text('Game Over!', 50, 100, color565(255, 255, 255))