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实验名称：点亮第1个LED
实验平台：核桃派
#导入相关模块
import board
from digitalio import DigitalInOut, Direction
#构建LED对象和初始化
led = DigitalInOut(board.LED) #定义引脚编号
led.direction = Direction.OUTPUT #IO为输出
led.value = 1 #输出高电平，点亮板载LED蓝灯
#led.value = 0 #输出低电平，熄灭板载LED蓝灯