hige dura / Mbed 2 deprecated RC_reciever

RC_reciever

Dependencies:   mbed RC_reciever

Dependents:   RC_reciever

TextLCD.cpp@0:18d415e9d13b, 2012-12-04 (annotated)

Committer:
higedura
Date:
Tue Dec 04 14:40:04 2012 +0000
Revision:
0:18d415e9d13b
RC_reciever

Who changed what in which revision?

UserRevisionLine numberNew contents of line
higedura 0:18d415e9d13b 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
higedura 0:18d415e9d13b 2 * Copyright (c) 2007-2010, sford, http://mbed.org
higedura 0:18d415e9d13b 3 *
higedura 0:18d415e9d13b 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
higedura 0:18d415e9d13b 5 * of this software and associated documentation files (the "Software"), to deal
higedura 0:18d415e9d13b 6 * in the Software without restriction, including without limitation the rights
higedura 0:18d415e9d13b 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
higedura 0:18d415e9d13b 8 * copies of the Software, and to permit persons to whom the Software is
higedura 0:18d415e9d13b 9 * furnished to do so, subject to the following conditions:
higedura 0:18d415e9d13b 10 *
higedura 0:18d415e9d13b 11 * The above copyright notice and this permission notice shall be included in
higedura 0:18d415e9d13b 12 * all copies or substantial portions of the Software.
higedura 0:18d415e9d13b 13 *
higedura 0:18d415e9d13b 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
higedura 0:18d415e9d13b 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
higedura 0:18d415e9d13b 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
higedura 0:18d415e9d13b 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
higedura 0:18d415e9d13b 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
higedura 0:18d415e9d13b 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
higedura 0:18d415e9d13b 20 * THE SOFTWARE.
higedura 0:18d415e9d13b 21 */
higedura 0:18d415e9d13b 22
higedura 0:18d415e9d13b 23 #include "TextLCD.h"
higedura 0:18d415e9d13b 24 #include "mbed.h"
higedura 0:18d415e9d13b 25
higedura 0:18d415e9d13b 26 TextLCD::TextLCD(PinName rs, PinName e, PinName d4, PinName d5,
higedura 0:18d415e9d13b 27 PinName d6, PinName d7, LCDType type) : _rs(rs),
higedura 0:18d415e9d13b 28 _e(e), _d(d4, d5, d6, d7),
higedura 0:18d415e9d13b 29 _type(type) {
higedura 0:18d415e9d13b 30
higedura 0:18d415e9d13b 31 _e = 1;
higedura 0:18d415e9d13b 32 _rs = 0; // command mode
higedura 0:18d415e9d13b 33
higedura 0:18d415e9d13b 34 wait(0.015); // Wait 15ms to ensure powered up
higedura 0:18d415e9d13b 35
higedura 0:18d415e9d13b 36 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
higedura 0:18d415e9d13b 37 for (int i=0; i<3; i++) {
higedura 0:18d415e9d13b 38 writeByte(0x3);
higedura 0:18d415e9d13b 39 wait(0.00164); // this command takes 1.64ms, so wait for it
higedura 0:18d415e9d13b 40 }
higedura 0:18d415e9d13b 41 writeByte(0x2); // 4-bit mode
higedura 0:18d415e9d13b 42 wait(0.000040f); // most instructions take 40us
higedura 0:18d415e9d13b 43
higedura 0:18d415e9d13b 44 writeCommand(0x28); // Function set 001 BW N F - -
higedura 0:18d415e9d13b 45 writeCommand(0x0C);
higedura 0:18d415e9d13b 46 writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
higedura 0:18d415e9d13b 47 cls();
higedura 0:18d415e9d13b 48 }
higedura 0:18d415e9d13b 49
higedura 0:18d415e9d13b 50 void TextLCD::character(int column, int row, int c) {
higedura 0:18d415e9d13b 51 int a = address(column, row);
higedura 0:18d415e9d13b 52 writeCommand(a);
higedura 0:18d415e9d13b 53 writeData(c);
higedura 0:18d415e9d13b 54 }
higedura 0:18d415e9d13b 55
higedura 0:18d415e9d13b 56 void TextLCD::cls() {
higedura 0:18d415e9d13b 57 writeCommand(0x01); // cls, and set cursor to 0
higedura 0:18d415e9d13b 58 wait(0.00164f); // This command takes 1.64 ms
higedura 0:18d415e9d13b 59 locate(0, 0);
higedura 0:18d415e9d13b 60 }
higedura 0:18d415e9d13b 61
higedura 0:18d415e9d13b 62 void TextLCD::locate(int column, int row) {
higedura 0:18d415e9d13b 63 _column = column;
higedura 0:18d415e9d13b 64 _row = row;
higedura 0:18d415e9d13b 65 }
higedura 0:18d415e9d13b 66
higedura 0:18d415e9d13b 67 int TextLCD::_putc(int value) {
higedura 0:18d415e9d13b 68 if (value == '\n') {
higedura 0:18d415e9d13b 69 _column = 0;
higedura 0:18d415e9d13b 70 _row++;
higedura 0:18d415e9d13b 71 if (_row >= rows()) {
higedura 0:18d415e9d13b 72 _row = 0;
higedura 0:18d415e9d13b 73 }
higedura 0:18d415e9d13b 74 } else {
higedura 0:18d415e9d13b 75 character(_column, _row, value);
higedura 0:18d415e9d13b 76 _column++;
higedura 0:18d415e9d13b 77 if (_column >= columns()) {
higedura 0:18d415e9d13b 78 _column = 0;
higedura 0:18d415e9d13b 79 _row++;
higedura 0:18d415e9d13b 80 if (_row >= rows()) {
higedura 0:18d415e9d13b 81 _row = 0;
higedura 0:18d415e9d13b 82 }
higedura 0:18d415e9d13b 83 }
higedura 0:18d415e9d13b 84 }
higedura 0:18d415e9d13b 85 return value;
higedura 0:18d415e9d13b 86 }
higedura 0:18d415e9d13b 87
higedura 0:18d415e9d13b 88 int TextLCD::_getc() {
higedura 0:18d415e9d13b 89 return -1;
higedura 0:18d415e9d13b 90 }
higedura 0:18d415e9d13b 91
higedura 0:18d415e9d13b 92 void TextLCD::writeByte(int value) {
higedura 0:18d415e9d13b 93 _d = value >> 4;
higedura 0:18d415e9d13b 94 wait(0.000040f); // most instructions take 40us
higedura 0:18d415e9d13b 95 _e = 0;
higedura 0:18d415e9d13b 96 wait(0.000040f);
higedura 0:18d415e9d13b 97 _e = 1;
higedura 0:18d415e9d13b 98 _d = value >> 0;
higedura 0:18d415e9d13b 99 wait(0.000040f);
higedura 0:18d415e9d13b 100 _e = 0;
higedura 0:18d415e9d13b 101 wait(0.000040f); // most instructions take 40us
higedura 0:18d415e9d13b 102 _e = 1;
higedura 0:18d415e9d13b 103 }
higedura 0:18d415e9d13b 104
higedura 0:18d415e9d13b 105 void TextLCD::writeCommand(int command) {
higedura 0:18d415e9d13b 106 _rs = 0;
higedura 0:18d415e9d13b 107 writeByte(command);
higedura 0:18d415e9d13b 108 }
higedura 0:18d415e9d13b 109
higedura 0:18d415e9d13b 110 void TextLCD::writeData(int data) {
higedura 0:18d415e9d13b 111 _rs = 1;
higedura 0:18d415e9d13b 112 writeByte(data);
higedura 0:18d415e9d13b 113 }
higedura 0:18d415e9d13b 114
higedura 0:18d415e9d13b 115 int TextLCD::address(int column, int row) {
higedura 0:18d415e9d13b 116 switch (_type) {
higedura 0:18d415e9d13b 117 case LCD20x4:
higedura 0:18d415e9d13b 118 switch (row) {
higedura 0:18d415e9d13b 119 case 0:
higedura 0:18d415e9d13b 120 return 0x80 + column;
higedura 0:18d415e9d13b 121 case 1:
higedura 0:18d415e9d13b 122 return 0xc0 + column;
higedura 0:18d415e9d13b 123 case 2:
higedura 0:18d415e9d13b 124 return 0x94 + column;
higedura 0:18d415e9d13b 125 case 3:
higedura 0:18d415e9d13b 126 return 0xd4 + column;
higedura 0:18d415e9d13b 127 }
higedura 0:18d415e9d13b 128 case LCD16x2B:
higedura 0:18d415e9d13b 129 return 0x80 + (row * 40) + column;
higedura 0:18d415e9d13b 130 case LCD16x2:
higedura 0:18d415e9d13b 131 case LCD20x2:
higedura 0:18d415e9d13b 132 default:
higedura 0:18d415e9d13b 133 return 0x80 + (row * 0x40) + column;
higedura 0:18d415e9d13b 134 }
higedura 0:18d415e9d13b 135 }
higedura 0:18d415e9d13b 136
higedura 0:18d415e9d13b 137 int TextLCD::columns() {
higedura 0:18d415e9d13b 138 switch (_type) {
higedura 0:18d415e9d13b 139 case LCD20x4:
higedura 0:18d415e9d13b 140 case LCD20x2:
higedura 0:18d415e9d13b 141 return 20;
higedura 0:18d415e9d13b 142 case LCD16x2:
higedura 0:18d415e9d13b 143 case LCD16x2B:
higedura 0:18d415e9d13b 144 default:
higedura 0:18d415e9d13b 145 return 16;
higedura 0:18d415e9d13b 146 }
higedura 0:18d415e9d13b 147 }
higedura 0:18d415e9d13b 148
higedura 0:18d415e9d13b 149 int TextLCD::rows() {
higedura 0:18d415e9d13b 150 switch (_type) {
higedura 0:18d415e9d13b 151 case LCD20x4:
higedura 0:18d415e9d13b 152 return 4;
higedura 0:18d415e9d13b 153 case LCD16x2:
higedura 0:18d415e9d13b 154 case LCD16x2B:
higedura 0:18d415e9d13b 155 case LCD20x2:
higedura 0:18d415e9d13b 156 default:
higedura 0:18d415e9d13b 157 return 2;
higedura 0:18d415e9d13b 158 }
higedura 0:18d415e9d13b 159 }
higedura 0:18d415e9d13b 160