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/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
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* Copyright (c) 2007-2010, sford
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MBED_TEXTLCD_H
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#define MBED_TEXTLCD_H
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#include "mbed.h"
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class TextLCD : public Stream {
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public:
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// the different LCDs and addressing modes
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/** Select the type of LCD */
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enum LCDType {
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LCD16x2
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, LCD16x2B
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, LCD20x2
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, LCD20x4
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};
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TextLCD(PinName rs, PinName e, PinName d0, PinName d1, PinName d2, PinName d3, LCDType type = LCD16x2);
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// int putc(int c) inherited from Stream
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// int printf(...) inherited from Stream
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void character(int column, int row, int c);
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void locate(int column, int row);
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void cls();
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int rows();
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int columns();
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protected:
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// Stream implementation functions
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virtual int _putc(int value);
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virtual int _getc();
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// internal tx functions
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void writeByte(int value);
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void writeCommand(int command);
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void writeData(int data);
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int address(int column, int row);
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DigitalOut _rs, _e;
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BusOut _d;
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LCDType _type;
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// current row/column
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int _column;
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int _row;
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};
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#endif
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