teclado lcd
Dependencies: TextLCD keypad mbed
TextLCD.cpp@0:9a67044d749e, 2017-02-25 (annotated)
- Committer:
- serbm
- Date:
- Sat Feb 25 14:21:11 2017 +0000
- Revision:
- 0:9a67044d749e
teclado con lcd
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
serbm | 0:9a67044d749e | 1 | /* mbed TextLCD Library, for a 4-bit LCD based on HD44780 |
serbm | 0:9a67044d749e | 2 | * Copyright (c) 2007-2010, sford, http://mbed.org |
serbm | 0:9a67044d749e | 3 | * |
serbm | 0:9a67044d749e | 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
serbm | 0:9a67044d749e | 5 | * of this software and associated documentation files (the "Software"), to deal |
serbm | 0:9a67044d749e | 6 | * in the Software without restriction, including without limitation the rights |
serbm | 0:9a67044d749e | 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
serbm | 0:9a67044d749e | 8 | * copies of the Software, and to permit persons to whom the Software is |
serbm | 0:9a67044d749e | 9 | * furnished to do so, subject to the following conditions: |
serbm | 0:9a67044d749e | 10 | * |
serbm | 0:9a67044d749e | 11 | * The above copyright notice and this permission notice shall be included in |
serbm | 0:9a67044d749e | 12 | * all copies or substantial portions of the Software. |
serbm | 0:9a67044d749e | 13 | * |
serbm | 0:9a67044d749e | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
serbm | 0:9a67044d749e | 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
serbm | 0:9a67044d749e | 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
serbm | 0:9a67044d749e | 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
serbm | 0:9a67044d749e | 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
serbm | 0:9a67044d749e | 19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
serbm | 0:9a67044d749e | 20 | * THE SOFTWARE. |
serbm | 0:9a67044d749e | 21 | */ |
serbm | 0:9a67044d749e | 22 | |
serbm | 0:9a67044d749e | 23 | /* |
serbm | 0:9a67044d749e | 24 | * Comment: Added support for LCD40x2 and LCD8x2 |
serbm | 0:9a67044d749e | 25 | * Name: davervw |
serbm | 0:9a67044d749e | 26 | * Date: 02/26/2011 |
serbm | 0:9a67044d749e | 27 | */ |
serbm | 0:9a67044d749e | 28 | |
serbm | 0:9a67044d749e | 29 | #include "TextLCD.h" |
serbm | 0:9a67044d749e | 30 | #include "mbed.h" |
serbm | 0:9a67044d749e | 31 | |
serbm | 0:9a67044d749e | 32 | TextLCD::TextLCD(PinName rs, PinName e, PinName d4, PinName d5, |
serbm | 0:9a67044d749e | 33 | PinName d6, PinName d7, LCDType type) : _rs(rs), |
serbm | 0:9a67044d749e | 34 | _e(e), _d(d4, d5, d6, d7), |
serbm | 0:9a67044d749e | 35 | _type(type) { |
serbm | 0:9a67044d749e | 36 | |
serbm | 0:9a67044d749e | 37 | _e = 1; |
serbm | 0:9a67044d749e | 38 | _rs = 0; // command mode |
serbm | 0:9a67044d749e | 39 | |
serbm | 0:9a67044d749e | 40 | wait(0.015); // Wait 15ms to ensure powered up |
serbm | 0:9a67044d749e | 41 | |
serbm | 0:9a67044d749e | 42 | // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus) |
serbm | 0:9a67044d749e | 43 | for (int i=0; i<3; i++) { |
serbm | 0:9a67044d749e | 44 | writeByte(0x3); |
serbm | 0:9a67044d749e | 45 | wait(0.00164); // this command takes 1.64ms, so wait for it |
serbm | 0:9a67044d749e | 46 | } |
serbm | 0:9a67044d749e | 47 | writeByte(0x2); // 4-bit mode |
serbm | 0:9a67044d749e | 48 | wait(0.000040f); // most instructions take 40us |
serbm | 0:9a67044d749e | 49 | |
serbm | 0:9a67044d749e | 50 | writeCommand(0x28); // Function set 001 BW N F - - |
serbm | 0:9a67044d749e | 51 | writeCommand(0x0C); |
serbm | 0:9a67044d749e | 52 | writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes |
serbm | 0:9a67044d749e | 53 | cls(); |
serbm | 0:9a67044d749e | 54 | } |
serbm | 0:9a67044d749e | 55 | |
serbm | 0:9a67044d749e | 56 | void TextLCD::character(int column, int row, int c) { |
serbm | 0:9a67044d749e | 57 | int a = address(column, row); |
serbm | 0:9a67044d749e | 58 | writeCommand(a); |
serbm | 0:9a67044d749e | 59 | writeData(c); |
serbm | 0:9a67044d749e | 60 | } |
serbm | 0:9a67044d749e | 61 | |
serbm | 0:9a67044d749e | 62 | void TextLCD::cls() { |
serbm | 0:9a67044d749e | 63 | writeCommand(0x01); // cls, and set cursor to 0 |
serbm | 0:9a67044d749e | 64 | wait(0.00164f); // This command takes 1.64 ms |
serbm | 0:9a67044d749e | 65 | locate(0, 0); |
serbm | 0:9a67044d749e | 66 | } |
serbm | 0:9a67044d749e | 67 | |
serbm | 0:9a67044d749e | 68 | void TextLCD::locate(int column, int row) { |
serbm | 0:9a67044d749e | 69 | _column = column; |
serbm | 0:9a67044d749e | 70 | _row = row; |
serbm | 0:9a67044d749e | 71 | } |
serbm | 0:9a67044d749e | 72 | |
serbm | 0:9a67044d749e | 73 | int TextLCD::_putc(int value) { |
serbm | 0:9a67044d749e | 74 | if (value == '\n') { |
serbm | 0:9a67044d749e | 75 | _column = 0; |
serbm | 0:9a67044d749e | 76 | _row++; |
serbm | 0:9a67044d749e | 77 | if (_row >= rows()) { |
serbm | 0:9a67044d749e | 78 | _row = 0; |
serbm | 0:9a67044d749e | 79 | } |
serbm | 0:9a67044d749e | 80 | } else { |
serbm | 0:9a67044d749e | 81 | character(_column, _row, value); |
serbm | 0:9a67044d749e | 82 | _column++; |
serbm | 0:9a67044d749e | 83 | if (_column >= columns()) { |
serbm | 0:9a67044d749e | 84 | _column = 0; |
serbm | 0:9a67044d749e | 85 | _row++; |
serbm | 0:9a67044d749e | 86 | if (_row >= rows()) { |
serbm | 0:9a67044d749e | 87 | _row = 0; |
serbm | 0:9a67044d749e | 88 | } |
serbm | 0:9a67044d749e | 89 | } |
serbm | 0:9a67044d749e | 90 | } |
serbm | 0:9a67044d749e | 91 | return value; |
serbm | 0:9a67044d749e | 92 | } |
serbm | 0:9a67044d749e | 93 | |
serbm | 0:9a67044d749e | 94 | int TextLCD::_getc() { |
serbm | 0:9a67044d749e | 95 | return -1; |
serbm | 0:9a67044d749e | 96 | } |
serbm | 0:9a67044d749e | 97 | |
serbm | 0:9a67044d749e | 98 | void TextLCD::writeByte(int value) { |
serbm | 0:9a67044d749e | 99 | _d = value >> 4; |
serbm | 0:9a67044d749e | 100 | wait(0.000040f); // most instructions take 40us |
serbm | 0:9a67044d749e | 101 | _e = 0; |
serbm | 0:9a67044d749e | 102 | wait(0.000040f); |
serbm | 0:9a67044d749e | 103 | _e = 1; |
serbm | 0:9a67044d749e | 104 | _d = value >> 0; |
serbm | 0:9a67044d749e | 105 | wait(0.000040f); |
serbm | 0:9a67044d749e | 106 | _e = 0; |
serbm | 0:9a67044d749e | 107 | wait(0.000040f); // most instructions take 40us |
serbm | 0:9a67044d749e | 108 | _e = 1; |
serbm | 0:9a67044d749e | 109 | } |
serbm | 0:9a67044d749e | 110 | |
serbm | 0:9a67044d749e | 111 | void TextLCD::writeCommand(int command) { |
serbm | 0:9a67044d749e | 112 | _rs = 0; |
serbm | 0:9a67044d749e | 113 | writeByte(command); |
serbm | 0:9a67044d749e | 114 | } |
serbm | 0:9a67044d749e | 115 | |
serbm | 0:9a67044d749e | 116 | void TextLCD::writeData(int data) { |
serbm | 0:9a67044d749e | 117 | _rs = 1; |
serbm | 0:9a67044d749e | 118 | writeByte(data); |
serbm | 0:9a67044d749e | 119 | } |
serbm | 0:9a67044d749e | 120 | |
serbm | 0:9a67044d749e | 121 | int TextLCD::address(int column, int row) { |
serbm | 0:9a67044d749e | 122 | switch (_type) { |
serbm | 0:9a67044d749e | 123 | case LCD20x4: |
serbm | 0:9a67044d749e | 124 | switch (row) { |
serbm | 0:9a67044d749e | 125 | case 0: |
serbm | 0:9a67044d749e | 126 | return 0x80 + column; |
serbm | 0:9a67044d749e | 127 | case 1: |
serbm | 0:9a67044d749e | 128 | return 0xc0 + column; |
serbm | 0:9a67044d749e | 129 | case 2: |
serbm | 0:9a67044d749e | 130 | return 0x94 + column; |
serbm | 0:9a67044d749e | 131 | case 3: |
serbm | 0:9a67044d749e | 132 | return 0xd4 + column; |
serbm | 0:9a67044d749e | 133 | } |
serbm | 0:9a67044d749e | 134 | case LCD16x2B: |
serbm | 0:9a67044d749e | 135 | return 0x80 + (row * 40) + column; |
serbm | 0:9a67044d749e | 136 | case LCD16x2: |
serbm | 0:9a67044d749e | 137 | case LCD40x2: |
serbm | 0:9a67044d749e | 138 | case LCD20x2: |
serbm | 0:9a67044d749e | 139 | case LCD8x2: |
serbm | 0:9a67044d749e | 140 | default: |
serbm | 0:9a67044d749e | 141 | return 0x80 + (row * 0x40) + column; |
serbm | 0:9a67044d749e | 142 | } |
serbm | 0:9a67044d749e | 143 | } |
serbm | 0:9a67044d749e | 144 | |
serbm | 0:9a67044d749e | 145 | int TextLCD::columns() { |
serbm | 0:9a67044d749e | 146 | switch (_type) { |
serbm | 0:9a67044d749e | 147 | case LCD20x4: |
serbm | 0:9a67044d749e | 148 | case LCD20x2: |
serbm | 0:9a67044d749e | 149 | return 20; |
serbm | 0:9a67044d749e | 150 | case LCD40x2: |
serbm | 0:9a67044d749e | 151 | return 40; |
serbm | 0:9a67044d749e | 152 | case LCD8x2: |
serbm | 0:9a67044d749e | 153 | return 8; |
serbm | 0:9a67044d749e | 154 | case LCD16x2: |
serbm | 0:9a67044d749e | 155 | case LCD16x2B: |
serbm | 0:9a67044d749e | 156 | default: |
serbm | 0:9a67044d749e | 157 | return 16; |
serbm | 0:9a67044d749e | 158 | } |
serbm | 0:9a67044d749e | 159 | } |
serbm | 0:9a67044d749e | 160 | |
serbm | 0:9a67044d749e | 161 | int TextLCD::rows() { |
serbm | 0:9a67044d749e | 162 | switch (_type) { |
serbm | 0:9a67044d749e | 163 | case LCD20x4: |
serbm | 0:9a67044d749e | 164 | return 4; |
serbm | 0:9a67044d749e | 165 | case LCD8x2: |
serbm | 0:9a67044d749e | 166 | case LCD16x2: |
serbm | 0:9a67044d749e | 167 | case LCD16x2B: |
serbm | 0:9a67044d749e | 168 | case LCD20x2: |
serbm | 0:9a67044d749e | 169 | case LCD40x2: |
serbm | 0:9a67044d749e | 170 | default: |
serbm | 0:9a67044d749e | 171 | return 2; |
serbm | 0:9a67044d749e | 172 | } |
serbm | 0:9a67044d749e | 173 | } |