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用Arduino Nano连接IIC LCD显示器模块上循环显示“Hennan University of
Technology”字样。并可适当改变显示样式和速度
学会使用LCD显示屏，静态显示或则滚动显示，并可以调整速度
原理图：
流程图：
代码加粗样式
#include <Wire.h> // Arduino IDE 內建
#include <LiquidCrystal_I2C.h>
// Set the pins on the I2C chip used for LCD connections:
// addr, en,rw,rs,d4,d5,d6,d7,bl,blpol
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // 設定 LCD I2C
位址
void setup() {
lcd.begin(16, 2); // 初始化 LCD，一行 16 的字元，共 2 行，预设开启背光
// 闪灯三次
for(int i = 0; i < 3; i++) {
lcd.backlight(); // 开启背光
delay(250);
lcd.noBacklight(); // 关闭背光
delay(250);
}
lcd.backlight();
lcd.clear();
}
void loop() {
lcd.setCursor(0, 0); // 设定游标位置在第一行行首
lcd.print(“Henan University of Technology”);
lcd.scrollDisplayLeft();
delay(300);
}
心得建议：该实验初始化 LCD，一行 16 的字元，共 2
行，预设开启背光，但实际上我只用了一行来显示，剩下的内容可以作为探究进行尝试，例如初始化三行的结果呢！两行一起滚动显示呢！
lcd.scrollDisplayLeft()可以实现向左滚动
lcd.scrollDisplayRight()可以实现向右滚动
你知道如何只显示一次吗？不重复显示所打印的数据，答对有奖
