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.cpp
- Committer:
- llagendijk
- Date:
- 2011-01-26
- Revision:
- 2:8596e06f241f
- Parent:
- 1:18c56f038905
File content as of revision 2:8596e06f241f:
/* mbed TextDisplay Display Library Base Class * Copyright (c) 2007-2009 sford * Released under the MIT License: http://mbed.org/license/mit */ #include "TextDisplay.h" TextDisplay::TextDisplay(const char *name) : Stream(name) { _row = 0; _column = 0; if (name == NULL) { _path = NULL; } else { _path = new char[strlen(name) + 2]; sprintf(_path, "/%s", name); } } int TextDisplay::_putc(int value) { if (value == '\n') { _column = 0; _row++; if (_row >= rows()) { _row = 0; } } else { character(_column, _row, value); _column++; if (_column >= columns()) { _column = 0; _row++; if (_row >= rows()) { _row = 0; } } } return value; } // crude cls implementation, should generally be overwritten in derived class void TextDisplay::cls() { locate(0, 0); for (int i=0; i<columns()*rows(); i++) { putc(' '); } } void TextDisplay::locate(uint16_t column, uint16_t row) { _column = column; _row = row; } int TextDisplay::_getc() { return -1; } void TextDisplay::foreground(uint32_t colour) { _foreground = colour; } void TextDisplay::background(uint32_t colour) { _background = colour; } bool TextDisplay::claim (FILE *stream) { if ( _path == NULL) { fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n"); return false; } if (freopen(_path, "w", stream) == NULL) { // Failed, should not happen return false; } // make sure we use line buffering setvbuf(stdout, NULL, _IOLBF, columns()); return true; }