the new engineer´s / PWM_LED

LED

Dependents:   LED_PWM_ansteuerung

TextDisplay.cpp@0:cbf905d4103b, 2016-05-03 (annotated)

Committer:
schoeni_91
Date:
Tue May 03 15:53:37 2016 +0000
Revision:
0:cbf905d4103b
f?r Rudi

Who changed what in which revision?

UserRevisionLine numberNew contents of line
schoeni_91 0:cbf905d4103b 1 /* mbed TextDisplay Display Library Base Class
schoeni_91 0:cbf905d4103b 2 * Copyright (c) 2007-2009 sford
schoeni_91 0:cbf905d4103b 3 * Released under the MIT License: http://mbed.org/license/mit
schoeni_91 0:cbf905d4103b 4 */
schoeni_91 0:cbf905d4103b 5
schoeni_91 0:cbf905d4103b 6 #include "TextDisplay.h"
schoeni_91 0:cbf905d4103b 7
schoeni_91 0:cbf905d4103b 8 TextDisplay::TextDisplay(const char *name) : Stream(){
schoeni_91 0:cbf905d4103b 9 _row = 0;
schoeni_91 0:cbf905d4103b 10 _column = 0;
schoeni_91 0:cbf905d4103b 11 if (name == NULL) {
schoeni_91 0:cbf905d4103b 12 _path = NULL;
schoeni_91 0:cbf905d4103b 13 } else {
schoeni_91 0:cbf905d4103b 14 _path = new char[strlen(name) + 2];
schoeni_91 0:cbf905d4103b 15 sprintf(_path, "/%s", name);
schoeni_91 0:cbf905d4103b 16 }
schoeni_91 0:cbf905d4103b 17 }
schoeni_91 0:cbf905d4103b 18
schoeni_91 0:cbf905d4103b 19 int TextDisplay::_putc(int value) {
schoeni_91 0:cbf905d4103b 20 if(value == '\n') {
schoeni_91 0:cbf905d4103b 21 _column = 0;
schoeni_91 0:cbf905d4103b 22 _row++;
schoeni_91 0:cbf905d4103b 23 if(_row >= rows()) {
schoeni_91 0:cbf905d4103b 24 _row = 0;
schoeni_91 0:cbf905d4103b 25 }
schoeni_91 0:cbf905d4103b 26 } else {
schoeni_91 0:cbf905d4103b 27 character(_column, _row, value);
schoeni_91 0:cbf905d4103b 28 _column++;
schoeni_91 0:cbf905d4103b 29 if(_column >= columns()) {
schoeni_91 0:cbf905d4103b 30 _column = 0;
schoeni_91 0:cbf905d4103b 31 _row++;
schoeni_91 0:cbf905d4103b 32 if(_row >= rows()) {
schoeni_91 0:cbf905d4103b 33 _row = 0;
schoeni_91 0:cbf905d4103b 34 }
schoeni_91 0:cbf905d4103b 35 }
schoeni_91 0:cbf905d4103b 36 }
schoeni_91 0:cbf905d4103b 37 return value;
schoeni_91 0:cbf905d4103b 38 }
schoeni_91 0:cbf905d4103b 39
schoeni_91 0:cbf905d4103b 40 // crude cls implementation, should generally be overwritten in derived class
schoeni_91 0:cbf905d4103b 41 void TextDisplay::cls() {
schoeni_91 0:cbf905d4103b 42 locate(0, 0);
schoeni_91 0:cbf905d4103b 43 for(int i=0; i<columns()*rows(); i++) {
schoeni_91 0:cbf905d4103b 44 putc(' ');
schoeni_91 0:cbf905d4103b 45 }
schoeni_91 0:cbf905d4103b 46 }
schoeni_91 0:cbf905d4103b 47
schoeni_91 0:cbf905d4103b 48 void TextDisplay::locate(int column, int row) {
schoeni_91 0:cbf905d4103b 49 _column = column;
schoeni_91 0:cbf905d4103b 50 _row = row;
schoeni_91 0:cbf905d4103b 51 }
schoeni_91 0:cbf905d4103b 52
schoeni_91 0:cbf905d4103b 53 int TextDisplay::_getc() {
schoeni_91 0:cbf905d4103b 54 return -1;
schoeni_91 0:cbf905d4103b 55 }
schoeni_91 0:cbf905d4103b 56
schoeni_91 0:cbf905d4103b 57 void TextDisplay::foreground(uint16_t colour) {
schoeni_91 0:cbf905d4103b 58 _foreground = colour;
schoeni_91 0:cbf905d4103b 59 }
schoeni_91 0:cbf905d4103b 60
schoeni_91 0:cbf905d4103b 61 void TextDisplay::background(uint16_t colour) {
schoeni_91 0:cbf905d4103b 62 _background = colour;
schoeni_91 0:cbf905d4103b 63 }
schoeni_91 0:cbf905d4103b 64
schoeni_91 0:cbf905d4103b 65 bool TextDisplay::claim (FILE *stream) {
schoeni_91 0:cbf905d4103b 66 if ( _path == NULL) {
schoeni_91 0:cbf905d4103b 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
schoeni_91 0:cbf905d4103b 68 return false;
schoeni_91 0:cbf905d4103b 69 }
schoeni_91 0:cbf905d4103b 70 if (freopen(_path, "w", stream) == NULL) {
schoeni_91 0:cbf905d4103b 71 // Failed, should not happen
schoeni_91 0:cbf905d4103b 72 return false;
schoeni_91 0:cbf905d4103b 73 }
schoeni_91 0:cbf905d4103b 74 // make sure we use line buffering
schoeni_91 0:cbf905d4103b 75 setvbuf(stdout, NULL, _IOLBF, columns());
schoeni_91 0:cbf905d4103b 76 return true;
schoeni_91 0:cbf905d4103b 77 }