hd44780_8bit.h

00001 /*
00002  * mbed LCDWindow library
00003 * Copyright (c) 2010 Hendrik Lipka
00004 * 
00005 * Permission is hereby granted, free of charge, to any person obtaining a copy
00006 * of this software and associated documentation files (the "Software"), to deal
00007 * in the Software without restriction, including without limitation the rights
00008 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00009 * copies of the Software, and to permit persons to whom the Software is
00010 * furnished to do so, subject to the following conditions:
00011 * 
00012 * The above copyright notice and this permission notice shall be included in
00013 * all copies or substantial portions of the Software.
00014 * 
00015 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00016 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00017 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00018 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00019 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00020 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00021 * THE SOFTWARE.
00022 */
00023 
00024 #ifndef HD44780_8BIT_H_
00025 #define HD44780_8BIT_H_
00026 
00027 #include "lcd.h"
00028 
00029 #include "BusOut.h"
00030 #include "DigitalOut.h"
00031 
00032 using namespace mbed; 
00033 
00034 /**
00035  * class for connecting HD44780-based LCD-Display (or using similiar controllers)
00036  * displays are connected in 8bit-mode
00037  * currently only 1 or 2 lines are supported
00038 */
00039 class HD44780LCD8bit: public TextLCDBase
00040 {
00041     public:
00042         /**
00043          * @param width number of chars per line
00044          * @param height number of lines (currently only 1 and 2 work)
00045          * @param data the bus object used for sending data (must be 8bit)
00046          * @param enable the pin name for the enable line (1=active)
00047          * @param rs the pin name for the register select line (0=cmd, 1=data)
00048         */
00049         HD44780LCD8bit(unsigned int columns, unsigned int rows, BusOut *data, PinName enable, PinName rs); 
00050         virtual void init();
00051         virtual void writeText(const unsigned int column, const unsigned int row, const char text[]);
00052         virtual void clear();
00053         virtual void character(int column, int row, int c);
00054 
00055     protected:
00056         void sendCmd(const unsigned char byte);
00057         void sendData(const unsigned char byte);
00058         
00059         void sendByte(const unsigned char byte);
00060         
00061         BusOut* _data;
00062         DigitalOut *_enable, *_rs;
00063 };
00064 #endif