Marco Zecchini
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Example_RTOS
Rtos API example
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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 /** 00022 * TextDisplay interface 00023 */ 00024 class TextDisplay : public Stream { 00025 public: 00026 00027 /** 00028 * Create a TextDisplay interface 00029 * 00030 * @param name The name used in the path to access the strean through the filesystem 00031 */ 00032 TextDisplay(const char *name = NULL); 00033 00034 /** 00035 * Output a character at the given position 00036 * 00037 * @param column column where charater must be written 00038 * @param row where character must be written 00039 * @param c the character to be written to the TextDisplay 00040 */ 00041 virtual void character(int column, int row, int c) = 0; 00042 00043 /** 00044 * Return number of rows on TextDisplay 00045 * 00046 * @results number of rows 00047 */ 00048 virtual int rows() = 0; 00049 00050 /** 00051 * Return number if columns on TextDisplay\ 00052 * 00053 * @results number of rows 00054 */ 00055 virtual int columns() = 0; 00056 00057 // functions that come for free, but can be overwritten 00058 00059 /** 00060 * Redirect output from a stream (stoud, sterr) to display 00061 * 00062 * @param stream stream that shall be redirected to the TextDisplay 00063 */ 00064 virtual bool claim (FILE *stream); 00065 00066 /** 00067 * Clear screen 00068 */ 00069 virtual void cls(); 00070 00071 /** 00072 * Change the cursor position to column, row (in pixels) 00073 */ 00074 virtual void locate(int column, int row); 00075 00076 virtual void foreground(uint16_t colour); 00077 virtual void background(uint16_t colour); 00078 // putc (from Stream) 00079 // printf (from Stream) 00080 00081 protected: 00082 00083 virtual int _putc(int value); 00084 virtual int _getc(); 00085 00086 // character location 00087 uint16_t _column; 00088 uint16_t _row; 00089 00090 // colours 00091 uint16_t _foreground; 00092 uint16_t _background; 00093 char *_path; 00094 }; 00095 00096 #endif
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