Mercurial > hp34970-firmware / annotate
lib/unigraphic/TextDisplay.cpp@e5254c6aa0c8 (annotated)
lib/unigraphic/TextDisplay.cpp
Tue, 11 Oct 2016 00:46:18 +0200
- author
- David Douard <david.douard@logilab.fr>
- date
- Tue, 11 Oct 2016 00:46:18 +0200
- changeset 9
- e5254c6aa0c8
- parent 5
- f1c85c2500f2
- permissions
- -rw-r--r--
use only one USART
with a front "AND" gate to combine both serial lines
| 5 | 1 | /* mbed TextDisplay Display Library Base Class |
| 2 | * Copyright (c) 2007-2009 sford | |
| 3 | * Released under the MIT License: http://mbed.org/license/mit | |
| 4 | */ | |
| 5 | ||
| 6 | #include "TextDisplay.h" | |
| 7 | ||
| 8 | TextDisplay::TextDisplay(const char *name) : Stream(name){ | |
| 9 | _row = 0; | |
| 10 | _column = 0; | |
| 11 | if (name == NULL) { | |
| 12 | _path = NULL; | |
| 13 | } else { | |
| 14 | _path = new char[strlen(name) + 2]; | |
| 15 | sprintf(_path, "/%s", name); | |
| 16 | } | |
| 17 | } | |
| 18 | ||
| 19 | int TextDisplay::_putc(int value) { | |
| 20 | if(value == '\n') { | |
| 21 | _column = 0; | |
| 22 | _row++; | |
| 23 | if(_row >= rows()) { | |
| 24 | _row = 0; | |
| 25 | } | |
| 26 | } else { | |
| 27 | character(_column, _row, value); | |
| 28 | _column++; | |
| 29 | if(_column >= columns()) { | |
| 30 | _column = 0; | |
| 31 | _row++; | |
| 32 | if(_row >= rows()) { | |
| 33 | _row = 0; | |
| 34 | } | |
| 35 | } | |
| 36 | } | |
| 37 | return value; | |
| 38 | } | |
| 39 | ||
| 40 | // crude cls implementation, should generally be overwritten in derived class | |
| 41 | void TextDisplay::cls() { | |
| 42 | locate(0, 0); | |
| 43 | for(int i=0; i<columns()*rows(); i++) { | |
| 44 | putc(' '); | |
| 45 | } | |
| 46 | } | |
| 47 | ||
| 48 | void TextDisplay::locate(int column, int row) { | |
| 49 | _column = column; | |
| 50 | _row = row; | |
| 51 | } | |
| 52 | ||
| 53 | int TextDisplay::_getc() { | |
| 54 | return -1; | |
| 55 | } | |
| 56 | ||
| 57 | void TextDisplay::foreground(uint16_t colour) { | |
| 58 | _foreground = colour; | |
| 59 | } | |
| 60 | ||
| 61 | void TextDisplay::background(uint16_t colour) { | |
| 62 | _background = colour; | |
| 63 | } | |
| 64 | ||
| 65 | bool TextDisplay::claim (FILE *stream) { | |
| 66 | if ( _path == NULL) { | |
| 67 | fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n"); | |
| 68 | return false; | |
| 69 | } | |
| 70 | if (freopen(_path, "w", stream) == NULL) { | |
| 71 | // Failed, should not happen | |
| 72 | return false; | |
| 73 | } | |
| 74 | // make sure we use line buffering | |
| 75 | setvbuf(stdout, NULL, _IOLBF, columns()); | |
| 76 | return true; | |
| 77 | } |
