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Dependencies:   mbed

C12832_lcd/TextDisplay.cpp@0:f4a7cf9ea593, 2020-07-31 (annotated)

Committer:
alanffrench
Date:
Fri Jul 31 17:21:00 2020 +0000
Revision:
0:f4a7cf9ea593
Chlorine Monitor

Who changed what in which revision?

UserRevisionLine numberNew contents of line
alanffrench 0:f4a7cf9ea593 1 /* mbed TextDisplay Display Library Base Class
alanffrench 0:f4a7cf9ea593 2 * Copyright (c) 2007-2009 sford
alanffrench 0:f4a7cf9ea593 3 * Released under the MIT License: http://mbed.org/license/mit
alanffrench 0:f4a7cf9ea593 4 */
alanffrench 0:f4a7cf9ea593 5
alanffrench 0:f4a7cf9ea593 6 #include "TextDisplay.h"
alanffrench 0:f4a7cf9ea593 7
alanffrench 0:f4a7cf9ea593 8 TextDisplay::TextDisplay(const char *name) : Stream(name){
alanffrench 0:f4a7cf9ea593 9 _row = 0;
alanffrench 0:f4a7cf9ea593 10 _column = 0;
alanffrench 0:f4a7cf9ea593 11 if (name == NULL) {
alanffrench 0:f4a7cf9ea593 12 _path = NULL;
alanffrench 0:f4a7cf9ea593 13 } else {
alanffrench 0:f4a7cf9ea593 14 _path = new char[strlen(name) + 2];
alanffrench 0:f4a7cf9ea593 15 sprintf(_path, "/%s", name);
alanffrench 0:f4a7cf9ea593 16 }
alanffrench 0:f4a7cf9ea593 17 }
alanffrench 0:f4a7cf9ea593 18
alanffrench 0:f4a7cf9ea593 19 int TextDisplay::_putc(int value) {
alanffrench 0:f4a7cf9ea593 20 if(value == '\n') {
alanffrench 0:f4a7cf9ea593 21 _column = 0;
alanffrench 0:f4a7cf9ea593 22 _row++;
alanffrench 0:f4a7cf9ea593 23 if(_row >= rows()) {
alanffrench 0:f4a7cf9ea593 24 _row = 0;
alanffrench 0:f4a7cf9ea593 25 }
alanffrench 0:f4a7cf9ea593 26 } else {
alanffrench 0:f4a7cf9ea593 27 character(_column, _row, value);
alanffrench 0:f4a7cf9ea593 28 _column++;
alanffrench 0:f4a7cf9ea593 29 if(_column >= columns()) {
alanffrench 0:f4a7cf9ea593 30 _column = 0;
alanffrench 0:f4a7cf9ea593 31 _row++;
alanffrench 0:f4a7cf9ea593 32 if(_row >= rows()) {
alanffrench 0:f4a7cf9ea593 33 _row = 0;
alanffrench 0:f4a7cf9ea593 34 }
alanffrench 0:f4a7cf9ea593 35 }
alanffrench 0:f4a7cf9ea593 36 }
alanffrench 0:f4a7cf9ea593 37 return value;
alanffrench 0:f4a7cf9ea593 38 }
alanffrench 0:f4a7cf9ea593 39
alanffrench 0:f4a7cf9ea593 40 // crude cls implementation, should generally be overwritten in derived class
alanffrench 0:f4a7cf9ea593 41 void TextDisplay::cls() {
alanffrench 0:f4a7cf9ea593 42 locate(0, 0);
alanffrench 0:f4a7cf9ea593 43 for(int i=0; i<columns()*rows(); i++) {
alanffrench 0:f4a7cf9ea593 44 putc(' ');
alanffrench 0:f4a7cf9ea593 45 }
alanffrench 0:f4a7cf9ea593 46 }
alanffrench 0:f4a7cf9ea593 47
alanffrench 0:f4a7cf9ea593 48 void TextDisplay::locate(int column, int row) {
alanffrench 0:f4a7cf9ea593 49 _column = column;
alanffrench 0:f4a7cf9ea593 50 _row = row;
alanffrench 0:f4a7cf9ea593 51 }
alanffrench 0:f4a7cf9ea593 52
alanffrench 0:f4a7cf9ea593 53 int TextDisplay::_getc() {
alanffrench 0:f4a7cf9ea593 54 return -1;
alanffrench 0:f4a7cf9ea593 55 }
alanffrench 0:f4a7cf9ea593 56
alanffrench 0:f4a7cf9ea593 57 void TextDisplay::foreground(uint16_t colour) {
alanffrench 0:f4a7cf9ea593 58 _foreground = colour;
alanffrench 0:f4a7cf9ea593 59 }
alanffrench 0:f4a7cf9ea593 60
alanffrench 0:f4a7cf9ea593 61 void TextDisplay::background(uint16_t colour) {
alanffrench 0:f4a7cf9ea593 62 _background = colour;
alanffrench 0:f4a7cf9ea593 63 }
alanffrench 0:f4a7cf9ea593 64
alanffrench 0:f4a7cf9ea593 65 bool TextDisplay::claim (FILE *stream) {
alanffrench 0:f4a7cf9ea593 66 if ( _path == NULL) {
alanffrench 0:f4a7cf9ea593 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
alanffrench 0:f4a7cf9ea593 68 return false;
alanffrench 0:f4a7cf9ea593 69 }
alanffrench 0:f4a7cf9ea593 70 if (freopen(_path, "w", stream) == NULL) {
alanffrench 0:f4a7cf9ea593 71 // Failed, should not happen
alanffrench 0:f4a7cf9ea593 72 return false;
alanffrench 0:f4a7cf9ea593 73 }
alanffrench 0:f4a7cf9ea593 74 // make sure we use line buffering
alanffrench 0:f4a7cf9ea593 75 setvbuf(stdout, NULL, _IOLBF, columns());
alanffrench 0:f4a7cf9ea593 76 return true;
alanffrench 0:f4a7cf9ea593 77 }