Mike Pollock / Mbed 2 deprecated SX10_BigBangFinal_A

Solo project mbed 2

Dependencies:   PololuLedStrip mbed

Fork of SX10_BigBangFinal_A by Tapton Eesarm

TextLCD.cpp@0:5ddd4b0f64f8, 2017-01-26 (annotated)

Committer:
taptoneesarm
Date:
Thu Jan 26 11:00:15 2017 +0000
Revision:
0:5ddd4b0f64f8
schooll led proiject

Who changed what in which revision?

UserRevisionLine numberNew contents of line
taptoneesarm 0:5ddd4b0f64f8 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
taptoneesarm 0:5ddd4b0f64f8 2 * Copyright (c) 2007-2010, sford, http://mbed.org
taptoneesarm 0:5ddd4b0f64f8 3 *
taptoneesarm 0:5ddd4b0f64f8 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
taptoneesarm 0:5ddd4b0f64f8 5 * of this software and associated documentation files (the "Software"), to deal
taptoneesarm 0:5ddd4b0f64f8 6 * in the Software without restriction, including without limitation the rights
taptoneesarm 0:5ddd4b0f64f8 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
taptoneesarm 0:5ddd4b0f64f8 8 * copies of the Software, and to permit persons to whom the Software is
taptoneesarm 0:5ddd4b0f64f8 9 * furnished to do so, subject to the following conditions:
taptoneesarm 0:5ddd4b0f64f8 10 *
taptoneesarm 0:5ddd4b0f64f8 11 * The above copyright notice and this permission notice shall be included in
taptoneesarm 0:5ddd4b0f64f8 12 * all copies or substantial portions of the Software.
taptoneesarm 0:5ddd4b0f64f8 13 *
taptoneesarm 0:5ddd4b0f64f8 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
taptoneesarm 0:5ddd4b0f64f8 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
taptoneesarm 0:5ddd4b0f64f8 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
taptoneesarm 0:5ddd4b0f64f8 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
taptoneesarm 0:5ddd4b0f64f8 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
taptoneesarm 0:5ddd4b0f64f8 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
taptoneesarm 0:5ddd4b0f64f8 20 * THE SOFTWARE.
taptoneesarm 0:5ddd4b0f64f8 21 */
taptoneesarm 0:5ddd4b0f64f8 22
taptoneesarm 0:5ddd4b0f64f8 23 #include "TextLCD.h"
taptoneesarm 0:5ddd4b0f64f8 24 #include "mbed.h"
taptoneesarm 0:5ddd4b0f64f8 25
taptoneesarm 0:5ddd4b0f64f8 26 TextLCD::TextLCD(PinName rs, PinName e, PinName d4, PinName d5,
taptoneesarm 0:5ddd4b0f64f8 27 PinName d6, PinName d7, LCDType type) : _rs(rs),
taptoneesarm 0:5ddd4b0f64f8 28 _e(e), _d(d4, d5, d6, d7),
taptoneesarm 0:5ddd4b0f64f8 29 _type(type) {
taptoneesarm 0:5ddd4b0f64f8 30
taptoneesarm 0:5ddd4b0f64f8 31 _e = 1;
taptoneesarm 0:5ddd4b0f64f8 32 _rs = 0; // command mode
taptoneesarm 0:5ddd4b0f64f8 33
taptoneesarm 0:5ddd4b0f64f8 34 wait(0.015); // Wait 15ms to ensure powered up
taptoneesarm 0:5ddd4b0f64f8 35
taptoneesarm 0:5ddd4b0f64f8 36 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
taptoneesarm 0:5ddd4b0f64f8 37 for (int i=0; i<3; i++) {
taptoneesarm 0:5ddd4b0f64f8 38 writeByte(0x3);
taptoneesarm 0:5ddd4b0f64f8 39 wait(0.00164); // this command takes 1.64ms, so wait for it
taptoneesarm 0:5ddd4b0f64f8 40 }
taptoneesarm 0:5ddd4b0f64f8 41 writeByte(0x2); // 4-bit mode
taptoneesarm 0:5ddd4b0f64f8 42 wait(0.000040f); // most instructions take 40us
taptoneesarm 0:5ddd4b0f64f8 43
taptoneesarm 0:5ddd4b0f64f8 44 writeCommand(0x28); // Function set 001 BW N F - -
taptoneesarm 0:5ddd4b0f64f8 45 writeCommand(0x0C);
taptoneesarm 0:5ddd4b0f64f8 46 writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
taptoneesarm 0:5ddd4b0f64f8 47 cls();
taptoneesarm 0:5ddd4b0f64f8 48 }
taptoneesarm 0:5ddd4b0f64f8 49
taptoneesarm 0:5ddd4b0f64f8 50 void TextLCD::character(int column, int row, int c) {
taptoneesarm 0:5ddd4b0f64f8 51 int a = address(column, row);
taptoneesarm 0:5ddd4b0f64f8 52 writeCommand(a);
taptoneesarm 0:5ddd4b0f64f8 53 writeData(c);
taptoneesarm 0:5ddd4b0f64f8 54 }
taptoneesarm 0:5ddd4b0f64f8 55
taptoneesarm 0:5ddd4b0f64f8 56 void TextLCD::cls() {
taptoneesarm 0:5ddd4b0f64f8 57 writeCommand(0x01); // cls, and set cursor to 0
taptoneesarm 0:5ddd4b0f64f8 58 wait(0.00164f); // This command takes 1.64 ms
taptoneesarm 0:5ddd4b0f64f8 59 locate(0, 0);
taptoneesarm 0:5ddd4b0f64f8 60 }
taptoneesarm 0:5ddd4b0f64f8 61
taptoneesarm 0:5ddd4b0f64f8 62 void TextLCD::locate(int column, int row) {
taptoneesarm 0:5ddd4b0f64f8 63 _column = column;
taptoneesarm 0:5ddd4b0f64f8 64 _row = row;
taptoneesarm 0:5ddd4b0f64f8 65 }
taptoneesarm 0:5ddd4b0f64f8 66
taptoneesarm 0:5ddd4b0f64f8 67 int TextLCD::_putc(int value) {
taptoneesarm 0:5ddd4b0f64f8 68 if (value == '\n') {
taptoneesarm 0:5ddd4b0f64f8 69 _column = 0;
taptoneesarm 0:5ddd4b0f64f8 70 _row++;
taptoneesarm 0:5ddd4b0f64f8 71 if (_row >= rows()) {
taptoneesarm 0:5ddd4b0f64f8 72 _row = 0;
taptoneesarm 0:5ddd4b0f64f8 73 }
taptoneesarm 0:5ddd4b0f64f8 74 } else {
taptoneesarm 0:5ddd4b0f64f8 75 character(_column, _row, value);
taptoneesarm 0:5ddd4b0f64f8 76 _column++;
taptoneesarm 0:5ddd4b0f64f8 77 if (_column >= columns()) {
taptoneesarm 0:5ddd4b0f64f8 78 _column = 0;
taptoneesarm 0:5ddd4b0f64f8 79 _row++;
taptoneesarm 0:5ddd4b0f64f8 80 if (_row >= rows()) {
taptoneesarm 0:5ddd4b0f64f8 81 _row = 0;
taptoneesarm 0:5ddd4b0f64f8 82 }
taptoneesarm 0:5ddd4b0f64f8 83 }
taptoneesarm 0:5ddd4b0f64f8 84 }
taptoneesarm 0:5ddd4b0f64f8 85 return value;
taptoneesarm 0:5ddd4b0f64f8 86 }
taptoneesarm 0:5ddd4b0f64f8 87
taptoneesarm 0:5ddd4b0f64f8 88 int TextLCD::_getc() {
taptoneesarm 0:5ddd4b0f64f8 89 return -1;
taptoneesarm 0:5ddd4b0f64f8 90 }
taptoneesarm 0:5ddd4b0f64f8 91
taptoneesarm 0:5ddd4b0f64f8 92 void TextLCD::writeByte(int value) {
taptoneesarm 0:5ddd4b0f64f8 93 _d = value >> 4;
taptoneesarm 0:5ddd4b0f64f8 94 wait(0.000040f); // most instructions take 40us
taptoneesarm 0:5ddd4b0f64f8 95 _e = 0;
taptoneesarm 0:5ddd4b0f64f8 96 wait(0.000040f);
taptoneesarm 0:5ddd4b0f64f8 97 _e = 1;
taptoneesarm 0:5ddd4b0f64f8 98 _d = value >> 0;
taptoneesarm 0:5ddd4b0f64f8 99 wait(0.000040f);
taptoneesarm 0:5ddd4b0f64f8 100 _e = 0;
taptoneesarm 0:5ddd4b0f64f8 101 wait(0.000040f); // most instructions take 40us
taptoneesarm 0:5ddd4b0f64f8 102 _e = 1;
taptoneesarm 0:5ddd4b0f64f8 103 }
taptoneesarm 0:5ddd4b0f64f8 104
taptoneesarm 0:5ddd4b0f64f8 105 void TextLCD::writeCommand(int command) {
taptoneesarm 0:5ddd4b0f64f8 106 _rs = 0;
taptoneesarm 0:5ddd4b0f64f8 107 writeByte(command);
taptoneesarm 0:5ddd4b0f64f8 108 }
taptoneesarm 0:5ddd4b0f64f8 109
taptoneesarm 0:5ddd4b0f64f8 110 void TextLCD::writeData(int data) {
taptoneesarm 0:5ddd4b0f64f8 111 _rs = 1;
taptoneesarm 0:5ddd4b0f64f8 112 writeByte(data);
taptoneesarm 0:5ddd4b0f64f8 113 }
taptoneesarm 0:5ddd4b0f64f8 114
taptoneesarm 0:5ddd4b0f64f8 115 int TextLCD::address(int column, int row) {
taptoneesarm 0:5ddd4b0f64f8 116 switch (_type) {
taptoneesarm 0:5ddd4b0f64f8 117 case LCD20x4:
taptoneesarm 0:5ddd4b0f64f8 118 switch (row) {
taptoneesarm 0:5ddd4b0f64f8 119 case 0:
taptoneesarm 0:5ddd4b0f64f8 120 return 0x80 + column;
taptoneesarm 0:5ddd4b0f64f8 121 case 1:
taptoneesarm 0:5ddd4b0f64f8 122 return 0xc0 + column;
taptoneesarm 0:5ddd4b0f64f8 123 case 2:
taptoneesarm 0:5ddd4b0f64f8 124 return 0x94 + column;
taptoneesarm 0:5ddd4b0f64f8 125 case 3:
taptoneesarm 0:5ddd4b0f64f8 126 return 0xd4 + column;
taptoneesarm 0:5ddd4b0f64f8 127 }
taptoneesarm 0:5ddd4b0f64f8 128 case LCD16x2B:
taptoneesarm 0:5ddd4b0f64f8 129 return 0x80 + (row * 40) + column;
taptoneesarm 0:5ddd4b0f64f8 130 case LCD16x2:
taptoneesarm 0:5ddd4b0f64f8 131 case LCD20x2:
taptoneesarm 0:5ddd4b0f64f8 132 default:
taptoneesarm 0:5ddd4b0f64f8 133 return 0x80 + (row * 0x40) + column;
taptoneesarm 0:5ddd4b0f64f8 134 }
taptoneesarm 0:5ddd4b0f64f8 135 }
taptoneesarm 0:5ddd4b0f64f8 136
taptoneesarm 0:5ddd4b0f64f8 137 int TextLCD::columns() {
taptoneesarm 0:5ddd4b0f64f8 138 switch (_type) {
taptoneesarm 0:5ddd4b0f64f8 139 case LCD20x4:
taptoneesarm 0:5ddd4b0f64f8 140 case LCD20x2:
taptoneesarm 0:5ddd4b0f64f8 141 return 20;
taptoneesarm 0:5ddd4b0f64f8 142 case LCD16x2:
taptoneesarm 0:5ddd4b0f64f8 143 case LCD16x2B:
taptoneesarm 0:5ddd4b0f64f8 144 default:
taptoneesarm 0:5ddd4b0f64f8 145 return 16;
taptoneesarm 0:5ddd4b0f64f8 146 }
taptoneesarm 0:5ddd4b0f64f8 147 }
taptoneesarm 0:5ddd4b0f64f8 148
taptoneesarm 0:5ddd4b0f64f8 149 int TextLCD::rows() {
taptoneesarm 0:5ddd4b0f64f8 150 switch (_type) {
taptoneesarm 0:5ddd4b0f64f8 151 case LCD20x4:
taptoneesarm 0:5ddd4b0f64f8 152 return 4;
taptoneesarm 0:5ddd4b0f64f8 153 case LCD16x2:
taptoneesarm 0:5ddd4b0f64f8 154 case LCD16x2B:
taptoneesarm 0:5ddd4b0f64f8 155 case LCD20x2:
taptoneesarm 0:5ddd4b0f64f8 156 default:
taptoneesarm 0:5ddd4b0f64f8 157 return 2;
taptoneesarm 0:5ddd4b0f64f8 158 }
taptoneesarm 0:5ddd4b0f64f8 159 }