液晶LCD实验

ゝ一世哀愁。 2022-12-15 12:51 187阅读 0赞

# 液晶LCD实验 #

### 实验目的 ###

液晶开机时画面显示Welcome to me  
读取LM35温度传感器的值，显示在液晶上

### 理论学习 ###

LCD时可以显示ASCII码的英文字母、数字、标点符号(不可以显示中文)  
LCD总共可以显示2行乘以16个字符

### 原理图 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NjcxNzMy_size_16_color_FFFFFF_t_70_pic_center]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NjcxNzMy_size_16_color_FFFFFF_t_70_pic_center 1]

#include <LiquidCrystal.h>
    #define LM35 A0
    LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
    int val = 0;
    float temp = 0;
    void setup() { 
    	lcd.begin(16, 2);
    	lcd.print("welcome to use");
    	delay(1000);
    	lcd.clear();
    }
    void loop() { 
    	val = analogRead(LM35);
    	temp = val * 4.8876;
    	lcd.setCursor(0, 0);
    	lcd.print("LM35 temp = ");
    	lcd.setCursor(0, 1);
    	lcd.print((int)temp / 10);
    	lcd.print(".");
    	lcd.print((int)temp % 10);
    	lcd.print((char)223);
    	lcd.print("C");
    	delay(1000);
    }

在LCD中打印hello world代码

#include<Wire.h>
    #include<LiquidCrystal_I2C.h>
    LiquidCrystal_I2C lcd(0x27, 16, 2);
    void setup() { 
    	// put your setup code here, to run once:
    	lcd.init();
    	lcd.backlight();
    	lcd.print("hello");
    	lcd.setCursor(0, 1);
    	lcd.print("world");
    }
    
    void loop() { 
    	// put your main code here, to run repeatedly:
    
    }

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NjcxNzMy_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/b544157f00b84ab5854bc55b0d73a142.png