Alan Ffrench / Mbed 2 deprecated Experiment_2_5

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Dependencies:   mbed

C12832_lcd/TextDisplay.cpp@0:52468b19aa21, 2020-07-29 (annotated)

Committer:
alanffrench
Date:
Wed Jul 29 18:51:38 2020 +0000
Revision:
0:52468b19aa21
Threads

Who changed what in which revision?

UserRevisionLine numberNew contents of line
alanffrench 0:52468b19aa21 1 /* mbed TextDisplay Display Library Base Class
alanffrench 0:52468b19aa21 2 * Copyright (c) 2007-2009 sford
alanffrench 0:52468b19aa21 3 * Released under the MIT License: http://mbed.org/license/mit
alanffrench 0:52468b19aa21 4 */
alanffrench 0:52468b19aa21 5
alanffrench 0:52468b19aa21 6 #include "TextDisplay.h"
alanffrench 0:52468b19aa21 7
alanffrench 0:52468b19aa21 8 TextDisplay::TextDisplay(const char *name) : Stream(){
alanffrench 0:52468b19aa21 9 _row = 0;
alanffrench 0:52468b19aa21 10 _column = 0;
alanffrench 0:52468b19aa21 11 if (name == NULL) {
alanffrench 0:52468b19aa21 12 _path = NULL;
alanffrench 0:52468b19aa21 13 } else {
alanffrench 0:52468b19aa21 14 _path = new char[strlen(name) + 2];
alanffrench 0:52468b19aa21 15 sprintf(_path, "/%s", name);
alanffrench 0:52468b19aa21 16 }
alanffrench 0:52468b19aa21 17 }
alanffrench 0:52468b19aa21 18
alanffrench 0:52468b19aa21 19 int TextDisplay::_putc(int value) {
alanffrench 0:52468b19aa21 20 if(value == '\n') {
alanffrench 0:52468b19aa21 21 _column = 0;
alanffrench 0:52468b19aa21 22 _row++;
alanffrench 0:52468b19aa21 23 if(_row >= rows()) {
alanffrench 0:52468b19aa21 24 _row = 0;
alanffrench 0:52468b19aa21 25 }
alanffrench 0:52468b19aa21 26 } else {
alanffrench 0:52468b19aa21 27 character(_column, _row, value);
alanffrench 0:52468b19aa21 28 _column++;
alanffrench 0:52468b19aa21 29 if(_column >= columns()) {
alanffrench 0:52468b19aa21 30 _column = 0;
alanffrench 0:52468b19aa21 31 _row++;
alanffrench 0:52468b19aa21 32 if(_row >= rows()) {
alanffrench 0:52468b19aa21 33 _row = 0;
alanffrench 0:52468b19aa21 34 }
alanffrench 0:52468b19aa21 35 }
alanffrench 0:52468b19aa21 36 }
alanffrench 0:52468b19aa21 37 return value;
alanffrench 0:52468b19aa21 38 }
alanffrench 0:52468b19aa21 39
alanffrench 0:52468b19aa21 40 // crude cls implementation, should generally be overwritten in derived class
alanffrench 0:52468b19aa21 41 void TextDisplay::cls() {
alanffrench 0:52468b19aa21 42 locate(0, 0);
alanffrench 0:52468b19aa21 43 for(int i=0; i<columns()*rows(); i++) {
alanffrench 0:52468b19aa21 44 putc(' ');
alanffrench 0:52468b19aa21 45 }
alanffrench 0:52468b19aa21 46 }
alanffrench 0:52468b19aa21 47
alanffrench 0:52468b19aa21 48 void TextDisplay::locate(int column, int row) {
alanffrench 0:52468b19aa21 49 _column = column;
alanffrench 0:52468b19aa21 50 _row = row;
alanffrench 0:52468b19aa21 51 }
alanffrench 0:52468b19aa21 52
alanffrench 0:52468b19aa21 53 int TextDisplay::_getc() {
alanffrench 0:52468b19aa21 54 return -1;
alanffrench 0:52468b19aa21 55 }
alanffrench 0:52468b19aa21 56
alanffrench 0:52468b19aa21 57 void TextDisplay::foreground(uint16_t colour) {
alanffrench 0:52468b19aa21 58 _foreground = colour;
alanffrench 0:52468b19aa21 59 }
alanffrench 0:52468b19aa21 60
alanffrench 0:52468b19aa21 61 void TextDisplay::background(uint16_t colour) {
alanffrench 0:52468b19aa21 62 _background = colour;
alanffrench 0:52468b19aa21 63 }
alanffrench 0:52468b19aa21 64
alanffrench 0:52468b19aa21 65 bool TextDisplay::claim (FILE *stream) {
alanffrench 0:52468b19aa21 66 if ( _path == NULL) {
alanffrench 0:52468b19aa21 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
alanffrench 0:52468b19aa21 68 return false;
alanffrench 0:52468b19aa21 69 }
alanffrench 0:52468b19aa21 70 if (freopen(_path, "w", stream) == NULL) {
alanffrench 0:52468b19aa21 71 // Failed, should not happen
alanffrench 0:52468b19aa21 72 return false;
alanffrench 0:52468b19aa21 73 }
alanffrench 0:52468b19aa21 74 // make sure we use line buffering
alanffrench 0:52468b19aa21 75 setvbuf(stdout, NULL, _IOLBF, columns());
alanffrench 0:52468b19aa21 76 return true;
alanffrench 0:52468b19aa21 77 }