Harish Mekali / Mbed 2 deprecated GSM

GSM

Dependencies:   mbed

TextLCD.cpp@0:2a5254679d16, 2013-05-07 (annotated)

Committer:
HarishMekali
Date:
Tue May 07 13:45:44 2013 +0000
Revision:
0:2a5254679d16
GSM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
HarishMekali 0:2a5254679d16 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
HarishMekali 0:2a5254679d16 2 * Copyright (c) 2007-2010, sford
HarishMekali 0:2a5254679d16 3 *
HarishMekali 0:2a5254679d16 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
HarishMekali 0:2a5254679d16 5 * of this software and associated documentation files (the "Software"), to deal
HarishMekali 0:2a5254679d16 6 * in the Software without restriction, including without limitation the rights
HarishMekali 0:2a5254679d16 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
HarishMekali 0:2a5254679d16 8 * copies of the Software, and to permit persons to whom the Software is
HarishMekali 0:2a5254679d16 9 * furnished to do so, subject to the following conditions:
HarishMekali 0:2a5254679d16 10 *
HarishMekali 0:2a5254679d16 11 * The above copyright notice and this permission notice shall be included in
HarishMekali 0:2a5254679d16 12 * all copies or substantial portions of the Software.
HarishMekali 0:2a5254679d16 13 *
HarishMekali 0:2a5254679d16 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
HarishMekali 0:2a5254679d16 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
HarishMekali 0:2a5254679d16 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
HarishMekali 0:2a5254679d16 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
HarishMekali 0:2a5254679d16 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
HarishMekali 0:2a5254679d16 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
HarishMekali 0:2a5254679d16 20 * THE SOFTWARE.
HarishMekali 0:2a5254679d16 21 */
HarishMekali 0:2a5254679d16 22
HarishMekali 0:2a5254679d16 23 #include "TextLCD.h"
HarishMekali 0:2a5254679d16 24 #include "mbed.h"
HarishMekali 0:2a5254679d16 25
HarishMekali 0:2a5254679d16 26 TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1,
HarishMekali 0:2a5254679d16 27 PinName d2, PinName d3, LCDType type) : _rs(rs),
HarishMekali 0:2a5254679d16 28 _e(e), _d(d0, d1, d2, d3),
HarishMekali 0:2a5254679d16 29 _type(type) {
HarishMekali 0:2a5254679d16 30
HarishMekali 0:2a5254679d16 31 _e = 1;
HarishMekali 0:2a5254679d16 32 _rs = 0; // command mode
HarishMekali 0:2a5254679d16 33
HarishMekali 0:2a5254679d16 34 wait(0.015); // Wait 15ms to ensure powered up
HarishMekali 0:2a5254679d16 35
HarishMekali 0:2a5254679d16 36 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
HarishMekali 0:2a5254679d16 37 for (int i=0; i<3; i++) {
HarishMekali 0:2a5254679d16 38 writeByte(0x3);
HarishMekali 0:2a5254679d16 39 wait(0.00164); // this command takes 1.64ms, so wait for it
HarishMekali 0:2a5254679d16 40 }
HarishMekali 0:2a5254679d16 41 writeByte(0x2); // 4-bit mode
HarishMekali 0:2a5254679d16 42 wait(0.000040f); // most instructions take 40us
HarishMekali 0:2a5254679d16 43
HarishMekali 0:2a5254679d16 44 writeCommand(0x28); // Function set 001 BW N F - -
HarishMekali 0:2a5254679d16 45 writeCommand(0x0C);
HarishMekali 0:2a5254679d16 46 writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
HarishMekali 0:2a5254679d16 47 cls();
HarishMekali 0:2a5254679d16 48 }
HarishMekali 0:2a5254679d16 49
HarishMekali 0:2a5254679d16 50 void TextLCD::character(int column, int row, int c) {
HarishMekali 0:2a5254679d16 51 int a = address(column, row);
HarishMekali 0:2a5254679d16 52 writeCommand(a);
HarishMekali 0:2a5254679d16 53 writeData(c);
HarishMekali 0:2a5254679d16 54 }
HarishMekali 0:2a5254679d16 55
HarishMekali 0:2a5254679d16 56 void TextLCD::cls() {
HarishMekali 0:2a5254679d16 57 writeCommand(0x01); // cls, and set cursor to 0
HarishMekali 0:2a5254679d16 58 wait(0.00164f); // This command takes 1.64 ms
HarishMekali 0:2a5254679d16 59 locate(0, 0);
HarishMekali 0:2a5254679d16 60 }
HarishMekali 0:2a5254679d16 61
HarishMekali 0:2a5254679d16 62 void TextLCD::locate(int column, int row) {
HarishMekali 0:2a5254679d16 63 _column = column;
HarishMekali 0:2a5254679d16 64 _row = row;
HarishMekali 0:2a5254679d16 65 }
HarishMekali 0:2a5254679d16 66
HarishMekali 0:2a5254679d16 67 int TextLCD::_putc(int value) {
HarishMekali 0:2a5254679d16 68 if (value == '\n') {
HarishMekali 0:2a5254679d16 69 _column = 0;
HarishMekali 0:2a5254679d16 70 _row++;
HarishMekali 0:2a5254679d16 71 if (_row >= rows()) {
HarishMekali 0:2a5254679d16 72 _row = 0;
HarishMekali 0:2a5254679d16 73 }
HarishMekali 0:2a5254679d16 74 } else {
HarishMekali 0:2a5254679d16 75 character(_column, _row, value);
HarishMekali 0:2a5254679d16 76 _column++;
HarishMekali 0:2a5254679d16 77 if (_column >= columns()) {
HarishMekali 0:2a5254679d16 78 _column = 0;
HarishMekali 0:2a5254679d16 79 _row++;
HarishMekali 0:2a5254679d16 80 if (_row >= rows()) {
HarishMekali 0:2a5254679d16 81 _row = 0;
HarishMekali 0:2a5254679d16 82 }
HarishMekali 0:2a5254679d16 83 }
HarishMekali 0:2a5254679d16 84 }
HarishMekali 0:2a5254679d16 85 return value;
HarishMekali 0:2a5254679d16 86 }
HarishMekali 0:2a5254679d16 87
HarishMekali 0:2a5254679d16 88 int TextLCD::_getc() {
HarishMekali 0:2a5254679d16 89 return -1;
HarishMekali 0:2a5254679d16 90 }
HarishMekali 0:2a5254679d16 91
HarishMekali 0:2a5254679d16 92 void TextLCD::writeByte(int value) {
HarishMekali 0:2a5254679d16 93 _d = value >> 4;
HarishMekali 0:2a5254679d16 94 wait(0.000040f); // most instructions take 40us
HarishMekali 0:2a5254679d16 95 _e = 0;
HarishMekali 0:2a5254679d16 96 wait(0.000040f);
HarishMekali 0:2a5254679d16 97 _e = 1;
HarishMekali 0:2a5254679d16 98 _d = value >> 0;
HarishMekali 0:2a5254679d16 99 wait(0.000040f);
HarishMekali 0:2a5254679d16 100 _e = 0;
HarishMekali 0:2a5254679d16 101 wait(0.000040f); // most instructions take 40us
HarishMekali 0:2a5254679d16 102 _e = 1;
HarishMekali 0:2a5254679d16 103 }
HarishMekali 0:2a5254679d16 104
HarishMekali 0:2a5254679d16 105 void TextLCD::writeCommand(int command) {
HarishMekali 0:2a5254679d16 106 _rs = 0;
HarishMekali 0:2a5254679d16 107 writeByte(command);
HarishMekali 0:2a5254679d16 108 }
HarishMekali 0:2a5254679d16 109
HarishMekali 0:2a5254679d16 110 void TextLCD::writeData(int data) {
HarishMekali 0:2a5254679d16 111 _rs = 1;
HarishMekali 0:2a5254679d16 112 writeByte(data);
HarishMekali 0:2a5254679d16 113 }
HarishMekali 0:2a5254679d16 114
HarishMekali 0:2a5254679d16 115 int TextLCD::address(int column, int row) {
HarishMekali 0:2a5254679d16 116 switch (_type) {
HarishMekali 0:2a5254679d16 117 case LCD20x4:
HarishMekali 0:2a5254679d16 118 switch (row) {
HarishMekali 0:2a5254679d16 119 case 0:
HarishMekali 0:2a5254679d16 120 return 0x80 + column;
HarishMekali 0:2a5254679d16 121 case 1:
HarishMekali 0:2a5254679d16 122 return 0xc0 + column;
HarishMekali 0:2a5254679d16 123 case 2:
HarishMekali 0:2a5254679d16 124 return 0x94 + column;
HarishMekali 0:2a5254679d16 125 case 3:
HarishMekali 0:2a5254679d16 126 return 0xd4 + column;
HarishMekali 0:2a5254679d16 127 }
HarishMekali 0:2a5254679d16 128 case LCD16x2B:
HarishMekali 0:2a5254679d16 129 return 0x80 + (row * 40) + column;
HarishMekali 0:2a5254679d16 130 case LCD16x2:
HarishMekali 0:2a5254679d16 131 case LCD20x2:
HarishMekali 0:2a5254679d16 132 default:
HarishMekali 0:2a5254679d16 133 return 0x80 + (row * 0x40) + column;
HarishMekali 0:2a5254679d16 134 }
HarishMekali 0:2a5254679d16 135 }
HarishMekali 0:2a5254679d16 136
HarishMekali 0:2a5254679d16 137 int TextLCD::columns() {
HarishMekali 0:2a5254679d16 138 switch (_type) {
HarishMekali 0:2a5254679d16 139 case LCD20x4:
HarishMekali 0:2a5254679d16 140 case LCD20x2:
HarishMekali 0:2a5254679d16 141 return 20;
HarishMekali 0:2a5254679d16 142 case LCD16x2:
HarishMekali 0:2a5254679d16 143 case LCD16x2B:
HarishMekali 0:2a5254679d16 144 default:
HarishMekali 0:2a5254679d16 145 return 16;
HarishMekali 0:2a5254679d16 146 }
HarishMekali 0:2a5254679d16 147 }
HarishMekali 0:2a5254679d16 148
HarishMekali 0:2a5254679d16 149 int TextLCD::rows() {
HarishMekali 0:2a5254679d16 150 switch (_type) {
HarishMekali 0:2a5254679d16 151 case LCD20x4:
HarishMekali 0:2a5254679d16 152 return 4;
HarishMekali 0:2a5254679d16 153 case LCD16x2:
HarishMekali 0:2a5254679d16 154 case LCD16x2B:
HarishMekali 0:2a5254679d16 155 case LCD20x2:
HarishMekali 0:2a5254679d16 156 default:
HarishMekali 0:2a5254679d16 157 return 2;
HarishMekali 0:2a5254679d16 158 }
HarishMekali 0:2a5254679d16 159 }