DriverLCD.h

00001 #ifndef __DriverLCD__
00002 #define __DriverLCD__
00003 
00004 #include "mbed.h"
00005 
00006 /*
00007 * This module handles the low level control of a 16x2 LCD.
00008 * It contains a class structure, and allows for text to be written to the LCD. 
00009 * Text can be written by using printf, achived by including virtual Stream.
00010 */
00011 
00012 //Datasheet sparkfun.com/datasheets/LCD/HD44780.pdf
00013 
00014 #define CMD 0
00015 #define STR 1
00016 #define INIT 2
00017 
00018 class DriverLCD : public Stream
00019 {
00020 public:
00021 
00022     DriverLCD(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7);
00023     //Constructor
00024 
00025     void locate(int column, int row);
00026     //Moves cursor to specific position
00027     
00028     void cls();
00029     //Clear LCD
00030 
00031 protected:
00032 
00033     // Stream implementation functions
00034     virtual int _putc(int data);
00035     virtual int _getc();
00036 
00037     void character(int column, int row, int data);
00038     //Writes a char to the display at set coordinates 
00039 
00040     void LCD_DATA(int data,int command);
00041     //Configure LCD state
00042 
00043 
00044     DigitalOut _rs, _e; //Write and command pins
00045     BusOut _d;          //Data out
00046 
00047     int _column;    //Internal position store
00048     int _row;
00049 };
00050 
00051 #endif