TextLCD

This is a LCD display that can display two rows of 16 alphanumeric characters.

• Available from Rapid Electronics 2x16 Alphanumeric LCD

Library

Note: For a experimental new generic text display library, see http://mbed.org/forum/topic/195/?page=1#comment-1068

Import Library:

http://mbed.org/projects/cookbook/svn/TextLCD/trunk

Import Example program:

http://mbed.org/projects/cookbook/svn/TextLCD/example

• For details on how to use this in the compiler, see Importing Projects and Libraries in to the Compiler

Hello World!

#include "mbed.h"
#include "TextLCD.h"

TextLCD lcd(p24, p25, p26, p27, p28, p29, p30); // rs, rw, e, d0, d1, d2, d3

int main() {
    lcd.printf("Hello World!");
}

API

TextLCD	A 16x2 Text LCD controller
Functions
TextLCD	Create a TextLCD object, connected to the specified pins
putc	Write a character
printf	Write a formated string
locate	Locate to a certian position
cls	Clear the screen, and locate to 0,0

class TextLCD : public Stream

A 16x2 Text LCD controller

TextLCD( PinName  rs,    PinName  rw,    PinName  e,    PinName  d0,    PinName  d1,    PinName  d2,    PinName  d3,    int  columns  =  16, int  rows  =  2 )

Create a TextLCD object, connected to the specified pins

int putc( int  c )

Write a character

int printf( const  char  * format,   ... )

Write a formated string

virtual void locate( int  column, int  row )

Locate to a certian position

virtual void cls()

Clear the screen, and locate to 0,0

• Full api at http://mbed.org/projects/cookbook/api/TextLCD/trunk
• Full source at http://mbed.org/projects/cookbook/svn/TextLCD/trunk

Details

Screen Layout

pin   1                             16
    +-------------------------------------------------+
    | o o o o o o o o o o o o o o o o                 |
    | +---------------------------------------------+ |
    | | (0,0)                                (15,0) | |
    | |             Screen Location                 | |
    | | (0,1)                                (15,1) | |
    | +---------------------------------------------+ |
    +-------------------------------------------------+

Resources

Datasheets

• Datasheet for HD44870 Based LCD

• AC162B LCD Module Datasheet
• HD44780 LCD Driver Datasheet
• http://www.a-netz.de/lcd.en.php

PCB Library and Footprint

The Eagle PCB repository can be found at the Eagle page.