写一个树莓派机器人代码

以下是一个简单的树莓派机器人代码，使用Python编写，可以控制机器人的移动和灯光。

import RPi.GPIO as GPIO
import time

# 定义引脚
left_pin = 18
right_pin = 16
led_pin = 12

# 设置GPIO模式为BCM
GPIO.setmode(GPIO.BCM)

# 设置引脚为输出模式
GPIO.setup(left_pin, GPIO.OUT)
GPIO.setup(right_pin, GPIO.OUT)
GPIO.setup(led_pin, GPIO.OUT)

# 向左转
def turn_left():
    GPIO.output(left_pin, GPIO.HIGH)
    GPIO.output(right_pin, GPIO.LOW)
    time.sleep(1)
    stop()

# 向右转
def turn_right():
    GPIO.output(left_pin, GPIO.LOW)
    GPIO.output(right_pin, GPIO.HIGH)
    time.sleep(1)
    stop()

# 前进
def forward():
    GPIO.output(left_pin, GPIO.HIGH)
    GPIO.output(right_pin, GPIO.HIGH)

# 后退
def backward():
    GPIO.output(left_pin, GPIO.LOW)
    GPIO.output(right_pin, GPIO.LOW)

# 停止
def stop():
    GPIO.output(left_pin, GPIO.LOW)
    GPIO.output(right_pin, GPIO.LOW)

# 控制LED灯
def control_led(flag):
    if flag:
        GPIO.output(led_pin, GPIO.HIGH)
    else:
        GPIO.output(led_pin, GPIO.LOW)

# 主程序
if __name__ == '__main__':
    try:
        # 前进
        forward()
        time.sleep(3)
        # 向左转
        turn_left()
        time.sleep(3)
        # 向右转
        turn_right()
        time.sleep(3)
        # 后退
        backward()
        time.sleep(3)
        # 停止
        stop()
        # 控制LED灯
        control_led(True)
        time.sleep(3)
        control_led(False)
    except KeyboardInterrupt:
        GPIO.cleanup()

注意：在运行代码前，需要将左、右轮电机和LED灯连接到正确的GPIO引脚。