4180 / Mbed 2 deprecated Ipod

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Dependencies:   4DGL-uLCD-SE PinDetect SDFileSystem mbed wave_player

TextLCD/TextLCD.cpp@0:5369e93c00ed, 2016-04-11 (annotated)

Committer:
agamemaker
Date:
Mon Apr 11 16:50:37 2016 +0000
Revision:
0:5369e93c00ed
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Who changed what in which revision?

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agamemaker 0:5369e93c00ed 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
agamemaker 0:5369e93c00ed 2 * Copyright (c) 2007-2010, sford, http://mbed.org
agamemaker 0:5369e93c00ed 3 *
agamemaker 0:5369e93c00ed 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
agamemaker 0:5369e93c00ed 5 * of this software and associated documentation files (the "Software"), to deal
agamemaker 0:5369e93c00ed 6 * in the Software without restriction, including without limitation the rights
agamemaker 0:5369e93c00ed 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
agamemaker 0:5369e93c00ed 8 * copies of the Software, and to permit persons to whom the Software is
agamemaker 0:5369e93c00ed 9 * furnished to do so, subject to the following conditions:
agamemaker 0:5369e93c00ed 10 *
agamemaker 0:5369e93c00ed 11 * The above copyright notice and this permission notice shall be included in
agamemaker 0:5369e93c00ed 12 * all copies or substantial portions of the Software.
agamemaker 0:5369e93c00ed 13 *
agamemaker 0:5369e93c00ed 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
agamemaker 0:5369e93c00ed 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
agamemaker 0:5369e93c00ed 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
agamemaker 0:5369e93c00ed 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
agamemaker 0:5369e93c00ed 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
agamemaker 0:5369e93c00ed 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
agamemaker 0:5369e93c00ed 20 * THE SOFTWARE.
agamemaker 0:5369e93c00ed 21 */
agamemaker 0:5369e93c00ed 22
agamemaker 0:5369e93c00ed 23 #include "TextLCD.h"
agamemaker 0:5369e93c00ed 24 #include "mbed.h"
agamemaker 0:5369e93c00ed 25
agamemaker 0:5369e93c00ed 26 TextLCD::TextLCD(PinName rs, PinName e, PinName d4, PinName d5,
agamemaker 0:5369e93c00ed 27 PinName d6, PinName d7, LCDType type) : _rs(rs),
agamemaker 0:5369e93c00ed 28 _e(e), _d(d4, d5, d6, d7),
agamemaker 0:5369e93c00ed 29 _type(type) {
agamemaker 0:5369e93c00ed 30
agamemaker 0:5369e93c00ed 31 _e = 1;
agamemaker 0:5369e93c00ed 32 _rs = 0; // command mode
agamemaker 0:5369e93c00ed 33
agamemaker 0:5369e93c00ed 34 wait(0.015); // Wait 15ms to ensure powered up
agamemaker 0:5369e93c00ed 35
agamemaker 0:5369e93c00ed 36 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
agamemaker 0:5369e93c00ed 37 for (int i=0; i<3; i++) {
agamemaker 0:5369e93c00ed 38 writeByte(0x3);
agamemaker 0:5369e93c00ed 39 wait(0.00164); // this command takes 1.64ms, so wait for it
agamemaker 0:5369e93c00ed 40 }
agamemaker 0:5369e93c00ed 41 writeByte(0x2); // 4-bit mode
agamemaker 0:5369e93c00ed 42 wait(0.000040f); // most instructions take 40us
agamemaker 0:5369e93c00ed 43
agamemaker 0:5369e93c00ed 44 writeCommand(0x28); // Function set 001 BW N F - -
agamemaker 0:5369e93c00ed 45 writeCommand(0x0C);
agamemaker 0:5369e93c00ed 46 writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
agamemaker 0:5369e93c00ed 47 cls();
agamemaker 0:5369e93c00ed 48 }
agamemaker 0:5369e93c00ed 49
agamemaker 0:5369e93c00ed 50 void TextLCD::character(int column, int row, int c) {
agamemaker 0:5369e93c00ed 51 int a = address(column, row);
agamemaker 0:5369e93c00ed 52 writeCommand(a);
agamemaker 0:5369e93c00ed 53 writeData(c);
agamemaker 0:5369e93c00ed 54 }
agamemaker 0:5369e93c00ed 55
agamemaker 0:5369e93c00ed 56 void TextLCD::cls() {
agamemaker 0:5369e93c00ed 57 writeCommand(0x01); // cls, and set cursor to 0
agamemaker 0:5369e93c00ed 58 wait(0.00164f); // This command takes 1.64 ms
agamemaker 0:5369e93c00ed 59 locate(0, 0);
agamemaker 0:5369e93c00ed 60 }
agamemaker 0:5369e93c00ed 61
agamemaker 0:5369e93c00ed 62 void TextLCD::locate(int column, int row) {
agamemaker 0:5369e93c00ed 63 _column = column;
agamemaker 0:5369e93c00ed 64 _row = row;
agamemaker 0:5369e93c00ed 65 }
agamemaker 0:5369e93c00ed 66
agamemaker 0:5369e93c00ed 67 int TextLCD::_putc(int value) {
agamemaker 0:5369e93c00ed 68 if (value == '\n') {
agamemaker 0:5369e93c00ed 69 _column = 0;
agamemaker 0:5369e93c00ed 70 _row++;
agamemaker 0:5369e93c00ed 71 if (_row >= rows()) {
agamemaker 0:5369e93c00ed 72 _row = 0;
agamemaker 0:5369e93c00ed 73 }
agamemaker 0:5369e93c00ed 74 } else {
agamemaker 0:5369e93c00ed 75 character(_column, _row, value);
agamemaker 0:5369e93c00ed 76 _column++;
agamemaker 0:5369e93c00ed 77 if (_column >= columns()) {
agamemaker 0:5369e93c00ed 78 _column = 0;
agamemaker 0:5369e93c00ed 79 _row++;
agamemaker 0:5369e93c00ed 80 if (_row >= rows()) {
agamemaker 0:5369e93c00ed 81 _row = 0;
agamemaker 0:5369e93c00ed 82 }
agamemaker 0:5369e93c00ed 83 }
agamemaker 0:5369e93c00ed 84 }
agamemaker 0:5369e93c00ed 85 return value;
agamemaker 0:5369e93c00ed 86 }
agamemaker 0:5369e93c00ed 87
agamemaker 0:5369e93c00ed 88 int TextLCD::_getc() {
agamemaker 0:5369e93c00ed 89 return -1;
agamemaker 0:5369e93c00ed 90 }
agamemaker 0:5369e93c00ed 91
agamemaker 0:5369e93c00ed 92 void TextLCD::writeByte(int value) {
agamemaker 0:5369e93c00ed 93 _d = value >> 4;
agamemaker 0:5369e93c00ed 94 wait(0.000040f); // most instructions take 40us
agamemaker 0:5369e93c00ed 95 _e = 0;
agamemaker 0:5369e93c00ed 96 wait(0.000040f);
agamemaker 0:5369e93c00ed 97 _e = 1;
agamemaker 0:5369e93c00ed 98 _d = value >> 0;
agamemaker 0:5369e93c00ed 99 wait(0.000040f);
agamemaker 0:5369e93c00ed 100 _e = 0;
agamemaker 0:5369e93c00ed 101 wait(0.000040f); // most instructions take 40us
agamemaker 0:5369e93c00ed 102 _e = 1;
agamemaker 0:5369e93c00ed 103 }
agamemaker 0:5369e93c00ed 104
agamemaker 0:5369e93c00ed 105 void TextLCD::writeCommand(int command) {
agamemaker 0:5369e93c00ed 106 _rs = 0;
agamemaker 0:5369e93c00ed 107 writeByte(command);
agamemaker 0:5369e93c00ed 108 }
agamemaker 0:5369e93c00ed 109
agamemaker 0:5369e93c00ed 110 void TextLCD::writeData(int data) {
agamemaker 0:5369e93c00ed 111 _rs = 1;
agamemaker 0:5369e93c00ed 112 writeByte(data);
agamemaker 0:5369e93c00ed 113 }
agamemaker 0:5369e93c00ed 114
agamemaker 0:5369e93c00ed 115 int TextLCD::address(int column, int row) {
agamemaker 0:5369e93c00ed 116 switch (_type) {
agamemaker 0:5369e93c00ed 117 case LCD20x4:
agamemaker 0:5369e93c00ed 118 switch (row) {
agamemaker 0:5369e93c00ed 119 case 0:
agamemaker 0:5369e93c00ed 120 return 0x80 + column;
agamemaker 0:5369e93c00ed 121 case 1:
agamemaker 0:5369e93c00ed 122 return 0xc0 + column;
agamemaker 0:5369e93c00ed 123 case 2:
agamemaker 0:5369e93c00ed 124 return 0x94 + column;
agamemaker 0:5369e93c00ed 125 case 3:
agamemaker 0:5369e93c00ed 126 return 0xd4 + column;
agamemaker 0:5369e93c00ed 127 }
agamemaker 0:5369e93c00ed 128 case LCD16x2B:
agamemaker 0:5369e93c00ed 129 return 0x80 + (row * 40) + column;
agamemaker 0:5369e93c00ed 130 case LCD16x2:
agamemaker 0:5369e93c00ed 131 case LCD20x2:
agamemaker 0:5369e93c00ed 132 default:
agamemaker 0:5369e93c00ed 133 return 0x80 + (row * 0x40) + column;
agamemaker 0:5369e93c00ed 134 }
agamemaker 0:5369e93c00ed 135 }
agamemaker 0:5369e93c00ed 136
agamemaker 0:5369e93c00ed 137 int TextLCD::columns() {
agamemaker 0:5369e93c00ed 138 switch (_type) {
agamemaker 0:5369e93c00ed 139 case LCD20x4:
agamemaker 0:5369e93c00ed 140 case LCD20x2:
agamemaker 0:5369e93c00ed 141 return 20;
agamemaker 0:5369e93c00ed 142 case LCD16x2:
agamemaker 0:5369e93c00ed 143 case LCD16x2B:
agamemaker 0:5369e93c00ed 144 default:
agamemaker 0:5369e93c00ed 145 return 16;
agamemaker 0:5369e93c00ed 146 }
agamemaker 0:5369e93c00ed 147 }
agamemaker 0:5369e93c00ed 148
agamemaker 0:5369e93c00ed 149 int TextLCD::rows() {
agamemaker 0:5369e93c00ed 150 switch (_type) {
agamemaker 0:5369e93c00ed 151 case LCD20x4:
agamemaker 0:5369e93c00ed 152 return 4;
agamemaker 0:5369e93c00ed 153 case LCD16x2:
agamemaker 0:5369e93c00ed 154 case LCD16x2B:
agamemaker 0:5369e93c00ed 155 case LCD20x2:
agamemaker 0:5369e93c00ed 156 default:
agamemaker 0:5369e93c00ed 157 return 2;
agamemaker 0:5369e93c00ed 158 }
agamemaker 0:5369e93c00ed 159 }