Lee Kai Xuan / mbed-os

mbed-os

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features/unsupported/tests/peripherals/C12832/TextDisplay.cpp@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

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elessair 0:f269e3021894 1 /* mbed TextDisplay Display Library Base Class
elessair 0:f269e3021894 2 * Copyright (c) 2007-2009 sford
elessair 0:f269e3021894 3 * Released under the MIT License: http://mbed.org/license/mit
elessair 0:f269e3021894 4 */
elessair 0:f269e3021894 5
elessair 0:f269e3021894 6 #include "TextDisplay.h"
elessair 0:f269e3021894 7
elessair 0:f269e3021894 8 TextDisplay::TextDisplay(const char *name) : Stream(name){
elessair 0:f269e3021894 9 _row = 0;
elessair 0:f269e3021894 10 _column = 0;
elessair 0:f269e3021894 11 if (name == NULL) {
elessair 0:f269e3021894 12 _path = NULL;
elessair 0:f269e3021894 13 } else {
elessair 0:f269e3021894 14 _path = new char[strlen(name) + 2];
elessair 0:f269e3021894 15 sprintf(_path, "/%s", name);
elessair 0:f269e3021894 16 }
elessair 0:f269e3021894 17 }
elessair 0:f269e3021894 18
elessair 0:f269e3021894 19 int TextDisplay::_putc(int value) {
elessair 0:f269e3021894 20 if(value == '\n') {
elessair 0:f269e3021894 21 _column = 0;
elessair 0:f269e3021894 22 _row++;
elessair 0:f269e3021894 23 if(_row >= rows()) {
elessair 0:f269e3021894 24 _row = 0;
elessair 0:f269e3021894 25 }
elessair 0:f269e3021894 26 } else {
elessair 0:f269e3021894 27 character(_column, _row, value);
elessair 0:f269e3021894 28 _column++;
elessair 0:f269e3021894 29 if(_column >= columns()) {
elessair 0:f269e3021894 30 _column = 0;
elessair 0:f269e3021894 31 _row++;
elessair 0:f269e3021894 32 if(_row >= rows()) {
elessair 0:f269e3021894 33 _row = 0;
elessair 0:f269e3021894 34 }
elessair 0:f269e3021894 35 }
elessair 0:f269e3021894 36 }
elessair 0:f269e3021894 37 return value;
elessair 0:f269e3021894 38 }
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 // crude cls implementation, should generally be overwritten in derived class
elessair 0:f269e3021894 41 void TextDisplay::cls() {
elessair 0:f269e3021894 42 locate(0, 0);
elessair 0:f269e3021894 43 for(int i=0; i<columns()*rows(); i++) {
elessair 0:f269e3021894 44 putc(' ');
elessair 0:f269e3021894 45 }
elessair 0:f269e3021894 46 }
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 void TextDisplay::locate(int column, int row) {
elessair 0:f269e3021894 49 _column = column;
elessair 0:f269e3021894 50 _row = row;
elessair 0:f269e3021894 51 }
elessair 0:f269e3021894 52
elessair 0:f269e3021894 53 int TextDisplay::_getc() {
elessair 0:f269e3021894 54 return -1;
elessair 0:f269e3021894 55 }
elessair 0:f269e3021894 56
elessair 0:f269e3021894 57 void TextDisplay::foreground(uint16_t colour) {
elessair 0:f269e3021894 58 _foreground = colour;
elessair 0:f269e3021894 59 }
elessair 0:f269e3021894 60
elessair 0:f269e3021894 61 void TextDisplay::background(uint16_t colour) {
elessair 0:f269e3021894 62 _background = colour;
elessair 0:f269e3021894 63 }
elessair 0:f269e3021894 64
elessair 0:f269e3021894 65 bool TextDisplay::claim (FILE *stream) {
elessair 0:f269e3021894 66 if ( _path == NULL) {
elessair 0:f269e3021894 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
elessair 0:f269e3021894 68 return false;
elessair 0:f269e3021894 69 }
elessair 0:f269e3021894 70 if (freopen(_path, "w", stream) == NULL) {
elessair 0:f269e3021894 71 // Failed, should not happen
elessair 0:f269e3021894 72 return false;
elessair 0:f269e3021894 73 }
elessair 0:f269e3021894 74 // make sure we use line buffering
elessair 0:f269e3021894 75 setvbuf(stdout, NULL, _IOLBF, columns());
elessair 0:f269e3021894 76 return true;
elessair 0:f269e3021894 77 }