Louis Lagendijk L / TextDisplays

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@9:68ad299df12b, 2011-01-29 (annotated)

Committer:
llagendijk
Date:
Sat Jan 29 21:28:42 2011 +0000
Revision:
9:68ad299df12b
Parent:
2:8596e06f241f 
First release of my version of TextDisPlay

Who changed what in which revision?

UserRevisionLine numberNew contents of line
llagendijk 0:9e72c57b16fd 1 /* mbed TextDisplay Display Library Base Class
llagendijk 0:9e72c57b16fd 2 * Copyright (c) 2007-2009 sford
llagendijk 0:9e72c57b16fd 3 * Released under the MIT License: http://mbed.org/license/mit
llagendijk 0:9e72c57b16fd 4 */
llagendijk 1:18c56f038905 5
llagendijk 0:9e72c57b16fd 6 #include "TextDisplay.h"
llagendijk 0:9e72c57b16fd 7
llagendijk 1:18c56f038905 8 TextDisplay::TextDisplay(const char *name) : Stream(name) {
llagendijk 0:9e72c57b16fd 9 _row = 0;
llagendijk 0:9e72c57b16fd 10 _column = 0;
llagendijk 2:8596e06f241f 11 if (name == NULL) {
llagendijk 2:8596e06f241f 12 _path = NULL;
llagendijk 2:8596e06f241f 13 } else {
llagendijk 2:8596e06f241f 14 _path = new char[strlen(name) + 2];
llagendijk 2:8596e06f241f 15 sprintf(_path, "/%s", name);
llagendijk 2:8596e06f241f 16 }
llagendijk 0:9e72c57b16fd 17 }
llagendijk 1:18c56f038905 18
llagendijk 0:9e72c57b16fd 19 int TextDisplay::_putc(int value) {
llagendijk 1:18c56f038905 20 if (value == '\n') {
llagendijk 0:9e72c57b16fd 21 _column = 0;
llagendijk 0:9e72c57b16fd 22 _row++;
llagendijk 1:18c56f038905 23 if (_row >= rows()) {
llagendijk 0:9e72c57b16fd 24 _row = 0;
llagendijk 0:9e72c57b16fd 25 }
llagendijk 0:9e72c57b16fd 26 } else {
llagendijk 0:9e72c57b16fd 27 character(_column, _row, value);
llagendijk 0:9e72c57b16fd 28 _column++;
llagendijk 1:18c56f038905 29 if (_column >= columns()) {
llagendijk 0:9e72c57b16fd 30 _column = 0;
llagendijk 0:9e72c57b16fd 31 _row++;
llagendijk 1:18c56f038905 32 if (_row >= rows()) {
llagendijk 0:9e72c57b16fd 33 _row = 0;
llagendijk 0:9e72c57b16fd 34 }
llagendijk 0:9e72c57b16fd 35 }
llagendijk 0:9e72c57b16fd 36 }
llagendijk 0:9e72c57b16fd 37 return value;
llagendijk 0:9e72c57b16fd 38 }
llagendijk 0:9e72c57b16fd 39
llagendijk 0:9e72c57b16fd 40 // crude cls implementation, should generally be overwritten in derived class
llagendijk 0:9e72c57b16fd 41 void TextDisplay::cls() {
llagendijk 0:9e72c57b16fd 42 locate(0, 0);
llagendijk 1:18c56f038905 43 for (int i=0; i<columns()*rows(); i++) {
llagendijk 0:9e72c57b16fd 44 putc(' ');
llagendijk 0:9e72c57b16fd 45 }
llagendijk 0:9e72c57b16fd 46 }
llagendijk 0:9e72c57b16fd 47
llagendijk 0:9e72c57b16fd 48 void TextDisplay::locate(uint16_t column, uint16_t row) {
llagendijk 0:9e72c57b16fd 49 _column = column;
llagendijk 0:9e72c57b16fd 50 _row = row;
llagendijk 0:9e72c57b16fd 51 }
llagendijk 0:9e72c57b16fd 52
llagendijk 0:9e72c57b16fd 53 int TextDisplay::_getc() {
llagendijk 0:9e72c57b16fd 54 return -1;
llagendijk 0:9e72c57b16fd 55 }
llagendijk 1:18c56f038905 56
llagendijk 0:9e72c57b16fd 57 void TextDisplay::foreground(uint32_t colour) {
llagendijk 0:9e72c57b16fd 58 _foreground = colour;
llagendijk 0:9e72c57b16fd 59 }
llagendijk 0:9e72c57b16fd 60
llagendijk 0:9e72c57b16fd 61 void TextDisplay::background(uint32_t colour) {
llagendijk 0:9e72c57b16fd 62 _background = colour;
llagendijk 0:9e72c57b16fd 63 }
llagendijk 2:8596e06f241f 64
llagendijk 2:8596e06f241f 65 bool TextDisplay::claim (FILE *stream) {
llagendijk 2:8596e06f241f 66 if ( _path == NULL) {
llagendijk 2:8596e06f241f 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
llagendijk 2:8596e06f241f 68 return false;
llagendijk 2:8596e06f241f 69 }
llagendijk 2:8596e06f241f 70 if (freopen(_path, "w", stream) == NULL) {
llagendijk 2:8596e06f241f 71 // Failed, should not happen
llagendijk 2:8596e06f241f 72 return false;
llagendijk 2:8596e06f241f 73 }
llagendijk 2:8596e06f241f 74 // make sure we use line buffering
llagendijk 2:8596e06f241f 75 setvbuf(stdout, NULL, _IOLBF, columns());
llagendijk 2:8596e06f241f 76 return true;
llagendijk 2:8596e06f241f 77 }