eka sinambela / Mbed 2 deprecated mbed_measuring_temperature

measuring the salinity

Dependencies:   LinearAnalogSensors mbed

Fork of mbed_measuring_temperature by Mario Simaremare

TextLCD.cpp@8:4b68520855f1, 2016-06-14 (annotated)

Committer:
ekasinambela
Date:
Tue Jun 14 09:27:34 2016 +0000
Revision:
8:4b68520855f1
add LCD

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ekasinambela 8:4b68520855f1 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
ekasinambela 8:4b68520855f1 2 * Copyright (c) 2007-2010, sford, http://mbed.org
ekasinambela 8:4b68520855f1 3 *
ekasinambela 8:4b68520855f1 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
ekasinambela 8:4b68520855f1 5 * of this software and associated documentation files (the "Software"), to deal
ekasinambela 8:4b68520855f1 6 * in the Software without restriction, including without limitation the rights
ekasinambela 8:4b68520855f1 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
ekasinambela 8:4b68520855f1 8 * copies of the Software, and to permit persons to whom the Software is
ekasinambela 8:4b68520855f1 9 * furnished to do so, subject to the following conditions:
ekasinambela 8:4b68520855f1 10 *
ekasinambela 8:4b68520855f1 11 * The above copyright notice and this permission notice shall be included in
ekasinambela 8:4b68520855f1 12 * all copies or substantial portions of the Software.
ekasinambela 8:4b68520855f1 13 *
ekasinambela 8:4b68520855f1 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
ekasinambela 8:4b68520855f1 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ekasinambela 8:4b68520855f1 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ekasinambela 8:4b68520855f1 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ekasinambela 8:4b68520855f1 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ekasinambela 8:4b68520855f1 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
ekasinambela 8:4b68520855f1 20 * THE SOFTWARE.
ekasinambela 8:4b68520855f1 21 */
ekasinambela 8:4b68520855f1 22
ekasinambela 8:4b68520855f1 23 #include "TextLCD.h"
ekasinambela 8:4b68520855f1 24 #include "mbed.h"
ekasinambela 8:4b68520855f1 25
ekasinambela 8:4b68520855f1 26 TextLCD::TextLCD(PinName rs, PinName e, PinName d4, PinName d5,
ekasinambela 8:4b68520855f1 27 PinName d6, PinName d7, LCDType type) : _rs(rs),
ekasinambela 8:4b68520855f1 28 _e(e), _d(d4, d5, d6, d7),
ekasinambela 8:4b68520855f1 29 _type(type) {
ekasinambela 8:4b68520855f1 30
ekasinambela 8:4b68520855f1 31 _e = 1;
ekasinambela 8:4b68520855f1 32 _rs = 0; // command mode
ekasinambela 8:4b68520855f1 33
ekasinambela 8:4b68520855f1 34 wait(0.015); // Wait 15ms to ensure powered up
ekasinambela 8:4b68520855f1 35
ekasinambela 8:4b68520855f1 36 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
ekasinambela 8:4b68520855f1 37 for (int i=0; i<3; i++) {
ekasinambela 8:4b68520855f1 38 writeByte(0x3);
ekasinambela 8:4b68520855f1 39 wait(0.00164); // this command takes 1.64ms, so wait for it
ekasinambela 8:4b68520855f1 40 }
ekasinambela 8:4b68520855f1 41 writeByte(0x2); // 4-bit mode
ekasinambela 8:4b68520855f1 42 wait(0.000040f); // most instructions take 40us
ekasinambela 8:4b68520855f1 43
ekasinambela 8:4b68520855f1 44 writeCommand(0x28); // Function set 001 BW N F - -
ekasinambela 8:4b68520855f1 45 writeCommand(0x0C);
ekasinambela 8:4b68520855f1 46 writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
ekasinambela 8:4b68520855f1 47 cls();
ekasinambela 8:4b68520855f1 48 }
ekasinambela 8:4b68520855f1 49
ekasinambela 8:4b68520855f1 50 void TextLCD::character(int column, int row, int c) {
ekasinambela 8:4b68520855f1 51 int a = address(column, row);
ekasinambela 8:4b68520855f1 52 writeCommand(a);
ekasinambela 8:4b68520855f1 53 writeData(c);
ekasinambela 8:4b68520855f1 54 }
ekasinambela 8:4b68520855f1 55
ekasinambela 8:4b68520855f1 56 void TextLCD::cls() {
ekasinambela 8:4b68520855f1 57 writeCommand(0x01); // cls, and set cursor to 0
ekasinambela 8:4b68520855f1 58 wait(0.00164f); // This command takes 1.64 ms
ekasinambela 8:4b68520855f1 59 locate(0, 0);
ekasinambela 8:4b68520855f1 60 }
ekasinambela 8:4b68520855f1 61
ekasinambela 8:4b68520855f1 62 void TextLCD::locate(int column, int row) {
ekasinambela 8:4b68520855f1 63 _column = column;
ekasinambela 8:4b68520855f1 64 _row = row;
ekasinambela 8:4b68520855f1 65 }
ekasinambela 8:4b68520855f1 66
ekasinambela 8:4b68520855f1 67 int TextLCD::_putc(int value) {
ekasinambela 8:4b68520855f1 68 if (value == '\n') {
ekasinambela 8:4b68520855f1 69 _column = 0;
ekasinambela 8:4b68520855f1 70 _row++;
ekasinambela 8:4b68520855f1 71 if (_row >= rows()) {
ekasinambela 8:4b68520855f1 72 _row = 0;
ekasinambela 8:4b68520855f1 73 }
ekasinambela 8:4b68520855f1 74 } else {
ekasinambela 8:4b68520855f1 75 character(_column, _row, value);
ekasinambela 8:4b68520855f1 76 _column++;
ekasinambela 8:4b68520855f1 77 if (_column >= columns()) {
ekasinambela 8:4b68520855f1 78 _column = 0;
ekasinambela 8:4b68520855f1 79 _row++;
ekasinambela 8:4b68520855f1 80 if (_row >= rows()) {
ekasinambela 8:4b68520855f1 81 _row = 0;
ekasinambela 8:4b68520855f1 82 }
ekasinambela 8:4b68520855f1 83 }
ekasinambela 8:4b68520855f1 84 }
ekasinambela 8:4b68520855f1 85 return value;
ekasinambela 8:4b68520855f1 86 }
ekasinambela 8:4b68520855f1 87
ekasinambela 8:4b68520855f1 88 int TextLCD::_getc() {
ekasinambela 8:4b68520855f1 89 return -1;
ekasinambela 8:4b68520855f1 90 }
ekasinambela 8:4b68520855f1 91
ekasinambela 8:4b68520855f1 92 void TextLCD::writeByte(int value) {
ekasinambela 8:4b68520855f1 93 _d = value >> 4;
ekasinambela 8:4b68520855f1 94 wait(0.000040f); // most instructions take 40us
ekasinambela 8:4b68520855f1 95 _e = 0;
ekasinambela 8:4b68520855f1 96 wait(0.000040f);
ekasinambela 8:4b68520855f1 97 _e = 1;
ekasinambela 8:4b68520855f1 98 _d = value >> 0;
ekasinambela 8:4b68520855f1 99 wait(0.000040f);
ekasinambela 8:4b68520855f1 100 _e = 0;
ekasinambela 8:4b68520855f1 101 wait(0.000040f); // most instructions take 40us
ekasinambela 8:4b68520855f1 102 _e = 1;
ekasinambela 8:4b68520855f1 103 }
ekasinambela 8:4b68520855f1 104
ekasinambela 8:4b68520855f1 105 void TextLCD::writeCommand(int command) {
ekasinambela 8:4b68520855f1 106 _rs = 0;
ekasinambela 8:4b68520855f1 107 writeByte(command);
ekasinambela 8:4b68520855f1 108 }
ekasinambela 8:4b68520855f1 109
ekasinambela 8:4b68520855f1 110 void TextLCD::writeData(int data) {
ekasinambela 8:4b68520855f1 111 _rs = 1;
ekasinambela 8:4b68520855f1 112 writeByte(data);
ekasinambela 8:4b68520855f1 113 }
ekasinambela 8:4b68520855f1 114
ekasinambela 8:4b68520855f1 115 int TextLCD::address(int column, int row) {
ekasinambela 8:4b68520855f1 116 switch (_type) {
ekasinambela 8:4b68520855f1 117 case LCD20x4:
ekasinambela 8:4b68520855f1 118 switch (row) {
ekasinambela 8:4b68520855f1 119 case 0:
ekasinambela 8:4b68520855f1 120 return 0x80 + column;
ekasinambela 8:4b68520855f1 121 case 1:
ekasinambela 8:4b68520855f1 122 return 0xc0 + column;
ekasinambela 8:4b68520855f1 123 case 2:
ekasinambela 8:4b68520855f1 124 return 0x94 + column;
ekasinambela 8:4b68520855f1 125 case 3:
ekasinambela 8:4b68520855f1 126 return 0xd4 + column;
ekasinambela 8:4b68520855f1 127 }
ekasinambela 8:4b68520855f1 128 case LCD16x2B:
ekasinambela 8:4b68520855f1 129 return 0x80 + (row * 40) + column;
ekasinambela 8:4b68520855f1 130 case LCD16x2:
ekasinambela 8:4b68520855f1 131 case LCD20x2:
ekasinambela 8:4b68520855f1 132 default:
ekasinambela 8:4b68520855f1 133 return 0x80 + (row * 0x40) + column;
ekasinambela 8:4b68520855f1 134 }
ekasinambela 8:4b68520855f1 135 }
ekasinambela 8:4b68520855f1 136
ekasinambela 8:4b68520855f1 137 int TextLCD::columns() {
ekasinambela 8:4b68520855f1 138 switch (_type) {
ekasinambela 8:4b68520855f1 139 case LCD20x4:
ekasinambela 8:4b68520855f1 140 case LCD20x2:
ekasinambela 8:4b68520855f1 141 return 20;
ekasinambela 8:4b68520855f1 142 case LCD16x2:
ekasinambela 8:4b68520855f1 143 case LCD16x2B:
ekasinambela 8:4b68520855f1 144 default:
ekasinambela 8:4b68520855f1 145 return 16;
ekasinambela 8:4b68520855f1 146 }
ekasinambela 8:4b68520855f1 147 }
ekasinambela 8:4b68520855f1 148
ekasinambela 8:4b68520855f1 149 int TextLCD::rows() {
ekasinambela 8:4b68520855f1 150 switch (_type) {
ekasinambela 8:4b68520855f1 151 case LCD20x4:
ekasinambela 8:4b68520855f1 152 return 4;
ekasinambela 8:4b68520855f1 153 case LCD16x2:
ekasinambela 8:4b68520855f1 154 case LCD16x2B:
ekasinambela 8:4b68520855f1 155 case LCD20x2:
ekasinambela 8:4b68520855f1 156 default:
ekasinambela 8:4b68520855f1 157 return 2;
ekasinambela 8:4b68520855f1 158 }
ekasinambela 8:4b68520855f1 159 }