Simon Ford
/
TextDisplays
The start of a generic Text Display library to drive multiple types of text display in the same way
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TextDisplay.h
00001 /* mbed TextDisplay Library Base Class 00002 * Copyright (c) 2007-2009 sford 00003 * Released under the MIT License: http://mbed.org/license/mit 00004 * 00005 * A common base class for Text displays 00006 * To port a new display, derive from this class and implement 00007 * the constructor (setup the display), character (put a character 00008 * at a location), rows and columns (number of rows/cols) functions. 00009 * Everything else (locate, printf, putc, cls) will come for free 00010 * 00011 * The model is the display will wrap at the right and bottom, so you can 00012 * keep writing and will always get valid characters. The location is 00013 * maintained internally to the class to make this easy 00014 */ 00015 00016 #ifndef MBED_TEXTDISPLAY_H 00017 #define MBED_TEXTDISPLAY_H 00018 00019 #include "mbed.h" 00020 00021 class TextDisplay : public Stream { 00022 public: 00023 00024 // functions needing implementation in derived implementation class 00025 TextDisplay(); 00026 virtual void character(int column, int row, int c) = 0; 00027 virtual int rows() = 0; 00028 virtual int columns() = 0; 00029 00030 // functions that come for free, but can be overwritten 00031 virtual void cls(); 00032 virtual void locate(int column, int row); 00033 virtual void foreground(int colour); 00034 virtual void background(int colour); 00035 // putc (from Stream) 00036 // printf (from Stream) 00037 00038 protected: 00039 00040 virtual int _putc(int value); 00041 virtual int _getc(); 00042 00043 // character location 00044 short _column; 00045 short _row; 00046 00047 // colours 00048 int _foreground; 00049 int _background; 00050 }; 00051 00052 #endif
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