Fontana Romain / Mbed 2 deprecated DHT11

Programme d'une sonde de température DHT 11 associée à de la sauvegarde de données sur clé USB et à l'affichage de ces données sur afficheur LCD

Dependencies:   FatFileSystemCpp mbed

TextLCD.cpp@0:ed0b4e66d2ad, 2015-06-02 (annotated)

Committer:
Fanta025
Date:
Tue Jun 02 14:19:54 2015 +0000
Revision:
0:ed0b4e66d2ad
Programme d'une sonde de temp?rature DHT 11 associ?e ? de la sauvegarde de donn?es sur USB et un affichage sur ?cran LCD

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Fanta025 0:ed0b4e66d2ad 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
Fanta025 0:ed0b4e66d2ad 2 * Copyright (c) 2007-2010, sford, http://mbed.org
Fanta025 0:ed0b4e66d2ad 3 *
Fanta025 0:ed0b4e66d2ad 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
Fanta025 0:ed0b4e66d2ad 5 * of this software and associated documentation files (the "Software"), to deal
Fanta025 0:ed0b4e66d2ad 6 * in the Software without restriction, including without limitation the rights
Fanta025 0:ed0b4e66d2ad 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Fanta025 0:ed0b4e66d2ad 8 * copies of the Software, and to permit persons to whom the Software is
Fanta025 0:ed0b4e66d2ad 9 * furnished to do so, subject to the following conditions:
Fanta025 0:ed0b4e66d2ad 10 *
Fanta025 0:ed0b4e66d2ad 11 * The above copyright notice and this permission notice shall be included in
Fanta025 0:ed0b4e66d2ad 12 * all copies or substantial portions of the Software.
Fanta025 0:ed0b4e66d2ad 13 *
Fanta025 0:ed0b4e66d2ad 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Fanta025 0:ed0b4e66d2ad 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Fanta025 0:ed0b4e66d2ad 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Fanta025 0:ed0b4e66d2ad 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Fanta025 0:ed0b4e66d2ad 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Fanta025 0:ed0b4e66d2ad 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Fanta025 0:ed0b4e66d2ad 20 * THE SOFTWARE.
Fanta025 0:ed0b4e66d2ad 21 */
Fanta025 0:ed0b4e66d2ad 22
Fanta025 0:ed0b4e66d2ad 23 #include "TextLCD.h"
Fanta025 0:ed0b4e66d2ad 24 #include "mbed.h"
Fanta025 0:ed0b4e66d2ad 25
Fanta025 0:ed0b4e66d2ad 26 TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1,
Fanta025 0:ed0b4e66d2ad 27 PinName d2, PinName d3, LCDType type) : _rs(rs),
Fanta025 0:ed0b4e66d2ad 28 _e(e), _d(d0, d1, d2, d3),
Fanta025 0:ed0b4e66d2ad 29 _type(type) {
Fanta025 0:ed0b4e66d2ad 30
Fanta025 0:ed0b4e66d2ad 31 _e = 0;
Fanta025 0:ed0b4e66d2ad 32 _rs = 0; // command mode
Fanta025 0:ed0b4e66d2ad 33
Fanta025 0:ed0b4e66d2ad 34 wait(0.050); // Wait 15ms to ensure powered up
Fanta025 0:ed0b4e66d2ad 35
Fanta025 0:ed0b4e66d2ad 36 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
Fanta025 0:ed0b4e66d2ad 37 for (int i=0; i<3; i++) {
Fanta025 0:ed0b4e66d2ad 38 writeByte(0x30);
Fanta025 0:ed0b4e66d2ad 39 wait(0.002); // this command takes 1.64ms, so wait for it
Fanta025 0:ed0b4e66d2ad 40 }
Fanta025 0:ed0b4e66d2ad 41 writeByte(0x2);
Fanta025 0:ed0b4e66d2ad 42 wait(0.002);
Fanta025 0:ed0b4e66d2ad 43 writeCommand(0x29);
Fanta025 0:ed0b4e66d2ad 44 wait(0.001f);
Fanta025 0:ed0b4e66d2ad 45 writeCommand(0x14);
Fanta025 0:ed0b4e66d2ad 46 wait(0.001f);
Fanta025 0:ed0b4e66d2ad 47 writeCommand(0x55);
Fanta025 0:ed0b4e66d2ad 48 wait(0.001f);
Fanta025 0:ed0b4e66d2ad 49 writeCommand(0x6D);
Fanta025 0:ed0b4e66d2ad 50 wait(0.001f);
Fanta025 0:ed0b4e66d2ad 51 writeCommand(0x78);
Fanta025 0:ed0b4e66d2ad 52 wait(0.001f);
Fanta025 0:ed0b4e66d2ad 53 writeCommand(0x28);
Fanta025 0:ed0b4e66d2ad 54 wait(0.001f);
Fanta025 0:ed0b4e66d2ad 55 writeCommand(0x0C);
Fanta025 0:ed0b4e66d2ad 56 wait(0.001f);
Fanta025 0:ed0b4e66d2ad 57 writeCommand(0x01);
Fanta025 0:ed0b4e66d2ad 58 wait_ms(2);
Fanta025 0:ed0b4e66d2ad 59 writeCommand(0x06);
Fanta025 0:ed0b4e66d2ad 60 wait(0.001f);
Fanta025 0:ed0b4e66d2ad 61 }
Fanta025 0:ed0b4e66d2ad 62
Fanta025 0:ed0b4e66d2ad 63 void TextLCD::character(int column, int row, int c) {
Fanta025 0:ed0b4e66d2ad 64 int a = address(column, row);
Fanta025 0:ed0b4e66d2ad 65 writeCommand(a);
Fanta025 0:ed0b4e66d2ad 66 writeData(c);
Fanta025 0:ed0b4e66d2ad 67 }
Fanta025 0:ed0b4e66d2ad 68
Fanta025 0:ed0b4e66d2ad 69 void TextLCD::cls() {
Fanta025 0:ed0b4e66d2ad 70 writeCommand(0x01); // cls, and set cursor to 0
Fanta025 0:ed0b4e66d2ad 71 wait(0.00164f); // This command takes 1.64 ms
Fanta025 0:ed0b4e66d2ad 72 locate(0, 0);
Fanta025 0:ed0b4e66d2ad 73 }
Fanta025 0:ed0b4e66d2ad 74
Fanta025 0:ed0b4e66d2ad 75 void TextLCD::locate(int column, int row) {
Fanta025 0:ed0b4e66d2ad 76 _column = column;
Fanta025 0:ed0b4e66d2ad 77 _row = row;
Fanta025 0:ed0b4e66d2ad 78 }
Fanta025 0:ed0b4e66d2ad 79
Fanta025 0:ed0b4e66d2ad 80 int TextLCD::_putc(int value) {
Fanta025 0:ed0b4e66d2ad 81 if (value == '\n') {
Fanta025 0:ed0b4e66d2ad 82 _column = 0;
Fanta025 0:ed0b4e66d2ad 83 _row++;
Fanta025 0:ed0b4e66d2ad 84 if (_row >= rows()) {
Fanta025 0:ed0b4e66d2ad 85 _row = 0;
Fanta025 0:ed0b4e66d2ad 86 }
Fanta025 0:ed0b4e66d2ad 87 } else {
Fanta025 0:ed0b4e66d2ad 88 character(_column, _row, value);
Fanta025 0:ed0b4e66d2ad 89 _column++;
Fanta025 0:ed0b4e66d2ad 90 if (_column >= columns()) {
Fanta025 0:ed0b4e66d2ad 91 _column = 0;
Fanta025 0:ed0b4e66d2ad 92 _row++;
Fanta025 0:ed0b4e66d2ad 93 if (_row >= rows()) {
Fanta025 0:ed0b4e66d2ad 94 _row = 0;
Fanta025 0:ed0b4e66d2ad 95 }
Fanta025 0:ed0b4e66d2ad 96 }
Fanta025 0:ed0b4e66d2ad 97 }
Fanta025 0:ed0b4e66d2ad 98 return value;
Fanta025 0:ed0b4e66d2ad 99 }
Fanta025 0:ed0b4e66d2ad 100
Fanta025 0:ed0b4e66d2ad 101 int TextLCD::_getc() {
Fanta025 0:ed0b4e66d2ad 102 return -1;
Fanta025 0:ed0b4e66d2ad 103 }
Fanta025 0:ed0b4e66d2ad 104
Fanta025 0:ed0b4e66d2ad 105 void TextLCD::writeByte(int value) {
Fanta025 0:ed0b4e66d2ad 106 _d = value >> 4;
Fanta025 0:ed0b4e66d2ad 107 wait(0.000040f); // most instructions take 40us
Fanta025 0:ed0b4e66d2ad 108 _e = 0;
Fanta025 0:ed0b4e66d2ad 109 wait(0.000040f);
Fanta025 0:ed0b4e66d2ad 110 _e = 1;
Fanta025 0:ed0b4e66d2ad 111 _d = value >> 0;
Fanta025 0:ed0b4e66d2ad 112 wait(0.000040f);
Fanta025 0:ed0b4e66d2ad 113 _e = 0;
Fanta025 0:ed0b4e66d2ad 114 wait(0.000040f); // most instructions take 40us
Fanta025 0:ed0b4e66d2ad 115 _e = 1;
Fanta025 0:ed0b4e66d2ad 116 }
Fanta025 0:ed0b4e66d2ad 117
Fanta025 0:ed0b4e66d2ad 118 void TextLCD::writeCommand(int command) {
Fanta025 0:ed0b4e66d2ad 119 _rs = 0;
Fanta025 0:ed0b4e66d2ad 120 writeByte(command);
Fanta025 0:ed0b4e66d2ad 121 }
Fanta025 0:ed0b4e66d2ad 122
Fanta025 0:ed0b4e66d2ad 123 void TextLCD::writeData(int data) {
Fanta025 0:ed0b4e66d2ad 124 _rs = 1;
Fanta025 0:ed0b4e66d2ad 125 writeByte(data);
Fanta025 0:ed0b4e66d2ad 126 }
Fanta025 0:ed0b4e66d2ad 127
Fanta025 0:ed0b4e66d2ad 128 int TextLCD::address(int column, int row) {
Fanta025 0:ed0b4e66d2ad 129 switch (_type) {
Fanta025 0:ed0b4e66d2ad 130 case LCD20x4:
Fanta025 0:ed0b4e66d2ad 131 switch (row) {
Fanta025 0:ed0b4e66d2ad 132 case 0:
Fanta025 0:ed0b4e66d2ad 133 return 0x80 + column;
Fanta025 0:ed0b4e66d2ad 134 case 1:
Fanta025 0:ed0b4e66d2ad 135 return 0xc0 + column;
Fanta025 0:ed0b4e66d2ad 136 case 2:
Fanta025 0:ed0b4e66d2ad 137 return 0x94 + column;
Fanta025 0:ed0b4e66d2ad 138 case 3:
Fanta025 0:ed0b4e66d2ad 139 return 0xd4 + column;
Fanta025 0:ed0b4e66d2ad 140 }
Fanta025 0:ed0b4e66d2ad 141 case LCD16x2B:
Fanta025 0:ed0b4e66d2ad 142 return 0x80 + (row * 40) + column;
Fanta025 0:ed0b4e66d2ad 143 case LCD16x2:
Fanta025 0:ed0b4e66d2ad 144 case LCD20x2:
Fanta025 0:ed0b4e66d2ad 145 default:
Fanta025 0:ed0b4e66d2ad 146 return 0x80 + (row * 0x40) + column;
Fanta025 0:ed0b4e66d2ad 147 }
Fanta025 0:ed0b4e66d2ad 148 }
Fanta025 0:ed0b4e66d2ad 149
Fanta025 0:ed0b4e66d2ad 150 int TextLCD::columns() {
Fanta025 0:ed0b4e66d2ad 151 switch (_type) {
Fanta025 0:ed0b4e66d2ad 152 case LCD20x4:
Fanta025 0:ed0b4e66d2ad 153 case LCD20x2:
Fanta025 0:ed0b4e66d2ad 154 return 20;
Fanta025 0:ed0b4e66d2ad 155 case LCD16x2:
Fanta025 0:ed0b4e66d2ad 156 case LCD16x2B:
Fanta025 0:ed0b4e66d2ad 157 default:
Fanta025 0:ed0b4e66d2ad 158 return 16;
Fanta025 0:ed0b4e66d2ad 159 }
Fanta025 0:ed0b4e66d2ad 160 }
Fanta025 0:ed0b4e66d2ad 161
Fanta025 0:ed0b4e66d2ad 162 int TextLCD::rows() {
Fanta025 0:ed0b4e66d2ad 163 switch (_type) {
Fanta025 0:ed0b4e66d2ad 164 case LCD20x4:
Fanta025 0:ed0b4e66d2ad 165 return 4;
Fanta025 0:ed0b4e66d2ad 166 case LCD16x2:
Fanta025 0:ed0b4e66d2ad 167 case LCD16x2B:
Fanta025 0:ed0b4e66d2ad 168 case LCD20x2:
Fanta025 0:ed0b4e66d2ad 169 default:
Fanta025 0:ed0b4e66d2ad 170 return 2;
Fanta025 0:ed0b4e66d2ad 171 }
Fanta025 0:ed0b4e66d2ad 172 }