This library can be used to control a low-cost Adafruit 358 TFT display. It has basic functionality but is a starting point for others trying to control this type of display using the FRDM-K64F.
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 /** Create a TextDisplay interface 00028 * 00029 * @param name The name used in the path to access the strean through the filesystem 00030 */ 00031 TextDisplay(const char *name = NULL); 00032 00033 /** Output a character at the given position 00034 * 00035 * @param column column where charater must be written 00036 * @param row where character must be written 00037 * @param c the character to be written to the TextDisplay 00038 */ 00039 virtual void character(int column, int row, int c) = 0; 00040 00041 /** Return number if rows on TextDisplay 00042 * 00043 * @result number of rows 00044 */ 00045 virtual int rows() = 0; 00046 00047 /** Return number if columns on TextDisplay 00048 * @result number of rows 00049 */ 00050 virtual int columns() = 0; 00051 00052 // functions that come for free, but can be overwritten 00053 00054 /** Redirect output from a stream (stoud, sterr) to display 00055 * @param stream stream that shall be redirected to the TextDisplay 00056 */ 00057 virtual bool claim (FILE *stream); 00058 00059 /** Clear screen 00060 */ 00061 virtual void cls(); 00062 virtual void locate(int column, int row); 00063 virtual void foreground(uint16_t colour); 00064 virtual void background(uint16_t colour); 00065 // putc (from Stream) 00066 // printf (from Stream) 00067 00068 protected: 00069 00070 virtual int _putc(int value); 00071 virtual int _getc(); 00072 00073 // character location 00074 uint16_t _column; 00075 uint16_t _row; 00076 00077 // colours 00078 uint16_t _foreground; 00079 uint16_t _background; 00080 char *_path; 00081 }; 00082 00083 #endif
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