FRDM-K64F Code Share / Adafruit_358

This library can be used to control a low-cost Adafruit 358 TFT display. It has basic functionality but is a starting point for others trying to control this type of display using the FRDM-K64F.

TextDisplay.cpp@1:cd3c7c2e2746, 2014-08-07 (annotated)

Committer:
bmazzeo
Date:
Thu Aug 07 03:17:21 2014 +0000
Revision:
1:cd3c7c2e2746
Parent:
0:7cb96171f886 
A few updates to clean up the code before publishing.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bmazzeo 0:7cb96171f886 1 /* mbed TextDisplay Display Library Base Class
bmazzeo 0:7cb96171f886 2 * Copyright (c) 2007-2009 sford
bmazzeo 0:7cb96171f886 3 * Released under the MIT License: http://mbed.org/license/mit
bmazzeo 0:7cb96171f886 4 */
bmazzeo 0:7cb96171f886 5
bmazzeo 0:7cb96171f886 6 #include "TextDisplay.h"
bmazzeo 0:7cb96171f886 7
bmazzeo 0:7cb96171f886 8 TextDisplay::TextDisplay(const char *name) : Stream(name){
bmazzeo 0:7cb96171f886 9 _row = 0;
bmazzeo 0:7cb96171f886 10 _column = 0;
bmazzeo 0:7cb96171f886 11 if (name == NULL) {
bmazzeo 0:7cb96171f886 12 _path = NULL;
bmazzeo 0:7cb96171f886 13 } else {
bmazzeo 0:7cb96171f886 14 _path = new char[strlen(name) + 2];
bmazzeo 0:7cb96171f886 15 sprintf(_path, "/%s", name);
bmazzeo 0:7cb96171f886 16 }
bmazzeo 0:7cb96171f886 17 }
bmazzeo 0:7cb96171f886 18
bmazzeo 0:7cb96171f886 19 int TextDisplay::_putc(int value) {
bmazzeo 0:7cb96171f886 20 if(value == '\n') {
bmazzeo 0:7cb96171f886 21 _column = 0;
bmazzeo 0:7cb96171f886 22 _row++;
bmazzeo 0:7cb96171f886 23 if(_row >= rows()) {
bmazzeo 0:7cb96171f886 24 _row = 0;
bmazzeo 0:7cb96171f886 25 }
bmazzeo 0:7cb96171f886 26 } else {
bmazzeo 0:7cb96171f886 27 character(_column, _row, value);
bmazzeo 0:7cb96171f886 28 _column++;
bmazzeo 0:7cb96171f886 29 if(_column >= columns()) {
bmazzeo 0:7cb96171f886 30 _column = 0;
bmazzeo 0:7cb96171f886 31 _row++;
bmazzeo 0:7cb96171f886 32 if(_row >= rows()) {
bmazzeo 0:7cb96171f886 33 _row = 0;
bmazzeo 0:7cb96171f886 34 }
bmazzeo 0:7cb96171f886 35 }
bmazzeo 0:7cb96171f886 36 }
bmazzeo 0:7cb96171f886 37 return value;
bmazzeo 0:7cb96171f886 38 }
bmazzeo 0:7cb96171f886 39
bmazzeo 0:7cb96171f886 40 // crude cls implementation, should generally be overwritten in derived class
bmazzeo 0:7cb96171f886 41 void TextDisplay::cls() {
bmazzeo 0:7cb96171f886 42 locate(0, 0);
bmazzeo 0:7cb96171f886 43 for(int i=0; i<columns()*rows(); i++) {
bmazzeo 0:7cb96171f886 44 putc(' ');
bmazzeo 0:7cb96171f886 45 }
bmazzeo 0:7cb96171f886 46 }
bmazzeo 0:7cb96171f886 47
bmazzeo 0:7cb96171f886 48 void TextDisplay::locate(int column, int row) {
bmazzeo 0:7cb96171f886 49 _column = column;
bmazzeo 0:7cb96171f886 50 _row = row;
bmazzeo 0:7cb96171f886 51 }
bmazzeo 0:7cb96171f886 52
bmazzeo 0:7cb96171f886 53 int TextDisplay::_getc() {
bmazzeo 0:7cb96171f886 54 return -1;
bmazzeo 0:7cb96171f886 55 }
bmazzeo 0:7cb96171f886 56
bmazzeo 0:7cb96171f886 57 void TextDisplay::foreground(uint16_t colour) {
bmazzeo 0:7cb96171f886 58 _foreground = colour;
bmazzeo 0:7cb96171f886 59 }
bmazzeo 0:7cb96171f886 60
bmazzeo 0:7cb96171f886 61 void TextDisplay::background(uint16_t colour) {
bmazzeo 0:7cb96171f886 62 _background = colour;
bmazzeo 0:7cb96171f886 63 }
bmazzeo 0:7cb96171f886 64
bmazzeo 0:7cb96171f886 65 bool TextDisplay::claim (FILE *stream) {
bmazzeo 0:7cb96171f886 66 if ( _path == NULL) {
bmazzeo 0:7cb96171f886 67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
bmazzeo 0:7cb96171f886 68 return false;
bmazzeo 0:7cb96171f886 69 }
bmazzeo 0:7cb96171f886 70 if (freopen(_path, "w", stream) == NULL) {
bmazzeo 0:7cb96171f886 71 // Failed, should not happen
bmazzeo 0:7cb96171f886 72 return false;
bmazzeo 0:7cb96171f886 73 }
bmazzeo 0:7cb96171f886 74 // make sure we use line buffering
bmazzeo 0:7cb96171f886 75 setvbuf(stdout, NULL, _IOLBF, columns());
bmazzeo 0:7cb96171f886 76 return true;
bmazzeo 0:7cb96171f886 77 }