- /*
- 【Arduino】108种传感器模块系列实验（资料+代码+图形+仿真）
- 实验一百三十四：2004A字符显示液晶模块LCD/LCM 蓝屏5V（带背光 IIC/I2C）
- 安装库：工具——管理库——搜索“LiquidCrystal_I2C"——下载安装
- 项目三：多重显示字符，系列演示
- Arduino------LCD2004A
- 5V-------------VCC
- GND-----------GND
- A4-----------SDA IIC 数据线
- A5-----------SCL IIC 时钟线
- */
- #include <Wire.h>
- #include <LiquidCrystal_I2C.h>
- #if defined(ARDUINO) && ARDUINO >= 100
- #define printByte(args) write(args);
- #else
- #define printByte(args) print(args,BYTE);
- #endif
- uint8_t bell[8] = {0x4, 0xe, 0xe, 0xe, 0x1f, 0x0, 0x4};
- uint8_t note[8] = {0x2, 0x3, 0x2, 0xe, 0x1e, 0xc, 0x0};
- uint8_t clock[8] = {0x0, 0xe, 0x15, 0x17, 0x11, 0xe, 0x0};
- uint8_t heart[8] = {0x0, 0xa, 0x1f, 0x1f, 0xe, 0x4, 0x0};
- uint8_t duck[8] = {0x0, 0xc, 0x1d, 0xf, 0xf, 0x6, 0x0};
- uint8_t check[8] = {0x0, 0x1, 0x3, 0x16, 0x1c, 0x8, 0x0};
- uint8_t cross[8] = {0x0, 0x1b, 0xe, 0x4, 0xe, 0x1b, 0x0};
- uint8_t retarrow[8] = { 0x1, 0x1, 0x5, 0x9, 0x1f, 0x8, 0x4};
- LiquidCrystal_I2C lcd(0x27, 20, 4); // set the LCD address to 0x27 for a 16 chars and 2 line display
- void setup()
- {
- lcd.init(); // initialize the lcd
- lcd.backlight();
- lcd.createChar(0, bell);
- lcd.createChar(1, note);
- lcd.createChar(2, clock);
- lcd.createChar(3, heart);
- lcd.createChar(4, duck);
- lcd.createChar(5, check);
- lcd.createChar(6, cross);
- lcd.createChar(7, retarrow);
- lcd.home();
- lcd.print("Hello world...");
- lcd.setCursor(0, 1);
- lcd.print(" i ");
- lcd.printByte(3);
- lcd.print(" arduinos!");
- delay(5000);
- displayKeyCodes();
- }
- // display all keycodes
- void displayKeyCodes(void) {
- uint8_t i = 0;
- while (1) {
- lcd.clear();
- lcd.print("Codes 0x"); lcd.print(i, HEX);
- lcd.print("-0x"); lcd.print(i + 16, HEX);
- lcd.setCursor(0, 1);
- for (int j = 0; j < 16; j++) {
- lcd.printByte(i + j);
- }
- i += 16;
- delay(4000);
- }
- }
- void loop()
- {
- }
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