arduino/Examples/LCDTest/LCDTest.ino

/* FILE:    ARD_LCD_HCMODU0010_I2C_Hello_World_Example
   DATE:    24/05/13
   VERSION: 0.1

This is a simple example of how to use the Hobby Components 20 x 4 line
I2C LCD module (HCMODU0010). To use this module you will require the
appropriate HC_LiquidCrystal_I2C library, which can be downloaded from our support
forum:

http://forum.hobbycomponents.com
 
This code also demonstrates the correct pin assignment for the LCD. When you
run this program you should see a greeting message appear on the display.


DEVICE PINOUT (SPI Interface):

PIN 1: GND
PIN 2: +5V
PIN 3: SDA - Connect to Arduino analogue PIN 4
PIN 4: SCL - Connect to Arduino analogue PIN 5


You may copy, alter and reuse this code in any way you like, but please leave
reference to HobbyComponents.com in your comments if you redistribute this code.
This software may not be used directly for the purpose of selling products that
directly compete with Hobby Components Ltd's own range of products.

THIS SOFTWARE IS PROVIDED "AS IS". HOBBY COMPONENTS LTD MAKES NO WARRANTIES, WHETHER
EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ACCURACY OR LACK OF NEGLIGENCE.
HOBBY COMPONENTS SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR ANY DAMAGES,
INCLUDING, BUT NOT LIMITED TO, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR ANY
REASON WHATSOEVER.
*/


/* Include the SPI/IIC Library */
#include <Wire.h>
#include "HC_LiquidCrystal_I2C.h"

/* Create some custom graphic characters to make a simple border */
uint8_t TopLeftCorner[]  = {0x00,0x00,0x0f,0x08,0x0b,0x0a,0x0a,0x0a};
uint8_t TopRightCorner[]  = {0x00,0x00,0x1e,0x02,0x1a,0x0a,0x0a,0x0a};
uint8_t BottomLeftCorner[]  = {0x0a,0x0a,0x0b,0x08,0x0f,0x00,0x00,0x00};
uint8_t BottomRightCorner[]  = {0x0a,0x0a,0x1a,0x02,0x1e,0x00,0x00,0x00};
uint8_t VerticalBar[]  = {0x0a,0x0a,0x0a,0x0a,0x0a,0x0a,0x0a};

/* Initialise the LiquidCrystal library. Note that the displays will have a default I2C
    address of either 0x27 or 0x3F. Uncomment one of the lines below depending on
    the address of your module. */

//HC_LiquidCrystal_I2C lcd(0x27,20,4);
HC_LiquidCrystal_I2C lcd(0x3F,20,4);

void setup()
{
    // Wire.pins(12, 14);
    /* Initialise the LCD */
    lcd.begin();
    /* Transfer the custom characters into the LCD's memory */
    lcd.createChar(0, TopLeftCorner);
    lcd.createChar(1, TopRightCorner);
    lcd.createChar(2, BottomLeftCorner);
    lcd.createChar(3, BottomRightCorner);
    lcd.createChar(4, VerticalBar);
}

/* Main program loop */
void loop()
{
    /* Make sure the backlight is turned on */
    lcd.backlight();

    /* Use the custom graphic characters to draw a border */
    lcd.setCursor(0, 0);
    lcd.write(0); //Write the top left graphic
    lcd.print("==================");
    lcd.write(1); //Write the top right graphic
    lcd.setCursor(0, 1);
    lcd.write(4); //Write the vertical bar graphic
    lcd.setCursor(0, 2);
    lcd.write(4); //Write the vertical bar graphic
    lcd.setCursor(19, 1);
    lcd.write(4); //Write the vertical bar graphic
    lcd.setCursor(19, 2);
    lcd.write(4); //Write the vertical bar graphic
    lcd.setCursor(0, 3);
    lcd.write(2); //Write the bottom left graphic
    lcd.print("==================");
    lcd.write(3); //Write the bottom right graphic

    /* Display some text inside the border */
    while (1)
    {
        lcd.setCursor(2,1);
        lcd.print("HOBBY COMPONENTS");
        lcd.setCursor(2,2);
        lcd.print("**HELLO WORLD**");
        delay(500);
        lcd.setCursor(2,1);
        lcd.print("                ");
        lcd.setCursor(2,2);
        lcd.print("               ");
        delay(500);
    }
}