A TextDisplay driver that supports graphical displays using on of the SED133x conrtrolers. Allows stdout and stderr output to be redirected to the display.
TextDisplay.h
- Committer:
- llagendijk
- Date:
- 2011-01-29
- Revision:
- 4:0cbf500f8650
- Parent:
- 3:c84bc6d1dc52
- Child:
- 7:d79600310cfe
File content as of revision 4:0cbf500f8650:
/* mbed TextDisplay Library Base Class * Copyright (c) 2007-2009 sford * Released under the MIT License: http://mbed.org/license/mit * * A common base class for Text displays * To port a new display, derive from this class and implement * the constructor (setup the display), character (put a character * at a location), rows and columns (number of rows/cols) functions. * Everything else (locate, printf, putc, cls) will come for free * * The model is the display will wrap at the right and bottom, so you can * keep writing and will always get valid characters. The location is * maintained internally to the class to make this easy */ #ifndef MBED_TEXTDISPLAY_H #define MBED_TEXTDISPLAY_H #include "mbed.h" #include "mbed.h" /** Text diaplay class, use one the derived classes * Example: * @code / simple test for TextDisplay class #include "mbed.h" #include "sed133xLCD.h" sed133xLCD lcd(p5, p6, p7, p8, p9, p28, p27, p26, p25, p24, p23, p22, p21,256,128, 6,9, "lcd"); int main() { lcd.printf("Hello TextDisplay world!\r\n"); lcd.claim(stdout); printf("hello stream world\r\n"); } * @endcode */ class TextDisplay : public Stream { public: // functions needing implementation in derived implementation class /** Create a TextDisplay interface * * @param name The name used in the path to access the strean through the filesystem */ TextDisplay(const char *name = NULL); /** output a character at the given position * * @param column column where charater must be written * @param row where character must be written * @parm c the character to be written to the TextDisplay */ virtual void character(uint16_t column, uint16_t row, int c) = 0; /** return number if rows on TextDisplay * @result number of rows */ virtual uint16_t rows() = 0; /** return number if columns on TextDisplay * @result number of rows */ virtual uint16_t columns() = 0; // functions that come for free, but can be overwritten /** redirect output from a stream (stoud, sterr) to display * @param stream that shall be redirected to the TextDisplay */ virtual bool claim (FILE *stream); /** clear screen */ virtual void cls(); /** locate cursor on given position * @param column horizontal position * @paran row vertical positon */ virtual void locate(uint16_t column, uint16_t row); /** set foreground colour * @param colour */ virtual void foreground(uint32_t colour); /** set background colour * @param colour */ virtual void background(uint32_t colour); // putc (from Stream) // printf (from Stream) protected: virtual int _putc(int value); virtual int _getc(); // character location uint16_t _column; uint16_t _row; // colours uint32_t _foreground; uint32_t _background; char *_path; }; #endif