Valentino Saitz / Mbed 2 deprecated LiquidCrystal_I2C

Port of the Arduino library with the same library. Includes a instance of the Print library from arduino

Dependencies:   mbed Print

Summary

A Conversion of the Arduino LiquidCrystal_I2C by Frank de Brabander to MBED
Version of original Library: 1.1.2
Information from the original library: The library allows to control I2C displays with functions extremely similar to LiquidCrystal library.
Original Github: https://github.com/johnrickman/LiquidCrystal_I2C

Code Example

This is a working example using the basic library features

#include "LiquidCrystal_I2C.h"

LiquidCrystal_I2C lcd(0x27, 20, 4, I2C_SDA, I2C_SCL);
void setup();
void loop();

//Arduino style setup function
void setup() {
	lcd.init();
	for (int i = 0; i < 3; i++) {
		lcd.backlight();
		wait_ms(250);
		lcd.noBacklight();
		wait_ms(250);
	}
	lcd.backlight();
	lcd.setCursor(3, 0); // Start at character 4 on line 0
	lcd.print("Hello, world!");
	wait_ms(500);
	lcd.setCursor(2, 1);
	lcd.print("From YourDuino");
	wait_ms(500);
	lcd.setCursor(0, 2);
	lcd.print("20 by 4 Line Display");
	lcd.setCursor(1, 3);
	wait_ms(1000);
	lcd.print("DVSProductions.de");
	wait_ms(8000);
}

//print some random characters
void loop() {
	//lcd.setCursor(rand() % 20, rand() % 4);
	//lcd.print(rand() % 10);      
	for (int x = 0; x != 20; x++)
		for (int y = 0; y != 20; y++)
			lcd.print(rand() % 10);
}

//Behave like an Arduino
int main() {
	setup();
	while (true)loop();
}

Misc

It is important to note that the library requires the init function to be called before sending any data. Instead of the arduino typical:

LiquidCrystal_I2C lcd(0x27, 20, 4);
void setup(){
	lcd.begin(20, 4);
}

We pass the pins and size to the constructor and then just call the init function:

LiquidCrystal_I2C lcd(0x27, 20, 4, I2C_SDA, I2C_SCL);
void setup(){
	lcd.init();
}

Also important is that the begin function still has value. It is now able to change the size of the LCD after the constructor. This might have few applications, but it is more powerful than the Arduino version, where the parameters had barely any use.

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