Peter Drescher / SPI_TFT

Library to control a QVGA TFT connected to SPI. You can use printf to print text The lib can handle different fonts, draw lines, circles, rect and bmp

Dependents:   TFT_Test1 SourceCodePro31-SB Mandelbrot Mindwave-screen ... more

See http://mbed.org/cookbook/SPI-driven-QVGA-TFT for details.

TextDisplay.cpp@0:de9d1462a835, 2012-09-10 (annotated)

Committer:
dreschpe
Date:
Mon Sep 10 19:23:26 2012 +0000
Revision:
0:de9d1462a835
[mbed] converted /TFT/SPI_TFT

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 0:de9d1462a835 1 /* mbed TextDisplay Display Library Base Class
dreschpe 0:de9d1462a835 2 * Copyright (c) 2007-2009 sford
dreschpe 0:de9d1462a835 3 * Released under the MIT License: http://mbed.org/license/mit
dreschpe 0:de9d1462a835 4 */
dreschpe 0:de9d1462a835 5
dreschpe 0:de9d1462a835 6 #include "TextDisplay.h"
dreschpe 0:de9d1462a835 7
dreschpe 0:de9d1462a835 8 TextDisplay::TextDisplay(const char *name) : Stream(name){
dreschpe 0:de9d1462a835 9 _row = 0;
dreschpe 0:de9d1462a835 10 _column = 0;
dreschpe 0:de9d1462a835 11 if (name == NULL) {
dreschpe 0:de9d1462a835 12 _path = NULL;
dreschpe 0:de9d1462a835 13 } else {
dreschpe 0:de9d1462a835 14 _path = new char[strlen(name) + 2];
dreschpe 0:de9d1462a835 15 sprintf(_path, "/%s", name);
dreschpe 0:de9d1462a835 16 }
dreschpe 0:de9d1462a835 17 }
dreschpe 0:de9d1462a835 18
dreschpe 0:de9d1462a835 19 int TextDisplay::_putc(int value) {
dreschpe 0:de9d1462a835 20 if(value == '\n') {
dreschpe 0:de9d1462a835 21 _column = 0;
dreschpe 0:de9d1462a835 22 _row++;
dreschpe 0:de9d1462a835 23 if(_row >= rows()) {
dreschpe 0:de9d1462a835 24 _row = 0;
dreschpe 0:de9d1462a835 25 }
dreschpe 0:de9d1462a835 26 } else {
dreschpe 0:de9d1462a835 27 character(_column, _row, value);
dreschpe 0:de9d1462a835 28 _column++;
dreschpe 0:de9d1462a835 29 if(_column >= columns()) {
dreschpe 0:de9d1462a835 30 _column = 0;
dreschpe 0:de9d1462a835 31 _row++;
dreschpe 0:de9d1462a835 32 if(_row >= rows()) {
dreschpe 0:de9d1462a835 33 _row = 0;
dreschpe 0:de9d1462a835 34 }
dreschpe 0:de9d1462a835 35 }
dreschpe 0:de9d1462a835 36 }
dreschpe 0:de9d1462a835 37 return value;
dreschpe 0:de9d1462a835 38 }
dreschpe 0:de9d1462a835 39
dreschpe 0:de9d1462a835 40 // crude cls implementation, should generally be overwritten in derived class
dreschpe 0:de9d1462a835 41 void TextDisplay::cls() {
dreschpe 0:de9d1462a835 42 locate(0, 0);
dreschpe 0:de9d1462a835 43 for(int i=0; i<columns()*rows(); i++) {
dreschpe 0:de9d1462a835 44 putc(' ');
dreschpe 0:de9d1462a835 45 }
dreschpe 0:de9d1462a835 46 }
dreschpe 0:de9d1462a835 47
dreschpe 0:de9d1462a835 48 void TextDisplay::locate(int column, int row) {
dreschpe 0:de9d1462a835 49 _column = column;
dreschpe 0:de9d1462a835 50 _row = row;
dreschpe 0:de9d1462a835 51 }
dreschpe 0:de9d1462a835 52
dreschpe 0:de9d1462a835 53 int TextDisplay::_getc() {
dreschpe 0:de9d1462a835 54 return -1;
dreschpe 0:de9d1462a835 55 }
dreschpe 0:de9d1462a835 56
dreschpe 0:de9d1462a835 57 void TextDisplay::foreground(uint16_t colour) {
dreschpe 0:de9d1462a835 58 _foreground = colour;
dreschpe 0:de9d1462a835 59 }
dreschpe 0:de9d1462a835 60
dreschpe 0:de9d1462a835 61 void TextDisplay::background(uint16_t colour) {
dreschpe 0:de9d1462a835 62 _background = colour;
dreschpe 0:de9d1462a835 63 }
dreschpe 0:de9d1462a835 64
dreschpe 0:de9d1462a835 65 bool TextDisplay::claim (FILE *stream) {
dreschpe 0:de9d1462a835 66 if ( _path == NULL) {
dreschpe 0:de9d1462a835 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
dreschpe 0:de9d1462a835 68 return false;
dreschpe 0:de9d1462a835 69 }
dreschpe 0:de9d1462a835 70 if (freopen(_path, "w", stream) == NULL) {
dreschpe 0:de9d1462a835 71 // Failed, should not happen
dreschpe 0:de9d1462a835 72 return false;
dreschpe 0:de9d1462a835 73 }
dreschpe 0:de9d1462a835 74 // make sure we use line buffering
dreschpe 0:de9d1462a835 75 setvbuf(stdout, NULL, _IOLBF, columns());
dreschpe 0:de9d1462a835 76 return true;
dreschpe 0:de9d1462a835 77 }