BigCrystalTWI

Arduino Library for displaying double height characters on an LCD display over I²C (Two Wire Interface) using the MCP2008 chipset, such as the Adafruit backpack. This library will not work for other I²C chipsets.

A corresponding library, BigCrystal supports other connection methods, such as 4 and 8 bit parallel, I²C using the PFC8574 expander and shift registers.

Usage

To use BigCrystalTWI, the sketch will need the following includes:

#include <Wire.h>
#include <LiquidTWI.h>
#include <BigCrystalTWI.h>

Creating the LCD object is similar to the LiquidTWI library; the I²C address needs to be specified. For example:

BigCrystalTWI lcd(0);

The following methods, in addition to those in LiquidTWI are available:

• writeBig(char c, uint8_t row, uint8_t col) - writes a single large character to the specified coordinates.
• printBig(char* str, uint8_t row, uint8_t col) - writes a String to the specified coordinates.
• widthBig(char c) - returns the width in characters of the specified large character. Includes the one column space following the character.