Dave Tech / Mbed 2 deprecated EepromTest

11u24 Eeprom utility.

Dependencies:   TextLCD mbed

TextLCD/TextLCD.cpp@0:e2b0ee19db2b, 2014-09-26 (annotated)

Committer:
kstech
Date:
Fri Sep 26 09:22:57 2014 +0000
Revision:
0:e2b0ee19db2b
11u24 Eeprom utility

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kstech 0:e2b0ee19db2b 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
kstech 0:e2b0ee19db2b 2 * Copyright (c) 2007-2010, sford, http://mbed.org
kstech 0:e2b0ee19db2b 3 *
kstech 0:e2b0ee19db2b 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
kstech 0:e2b0ee19db2b 5 * of this software and associated documentation files (the "Software"), to deal
kstech 0:e2b0ee19db2b 6 * in the Software without restriction, including without limitation the rights
kstech 0:e2b0ee19db2b 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
kstech 0:e2b0ee19db2b 8 * copies of the Software, and to permit persons to whom the Software is
kstech 0:e2b0ee19db2b 9 * furnished to do so, subject to the following conditions:
kstech 0:e2b0ee19db2b 10 *
kstech 0:e2b0ee19db2b 11 * The above copyright notice and this permission notice shall be included in
kstech 0:e2b0ee19db2b 12 * all copies or substantial portions of the Software.
kstech 0:e2b0ee19db2b 13 *
kstech 0:e2b0ee19db2b 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
kstech 0:e2b0ee19db2b 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
kstech 0:e2b0ee19db2b 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
kstech 0:e2b0ee19db2b 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
kstech 0:e2b0ee19db2b 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kstech 0:e2b0ee19db2b 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
kstech 0:e2b0ee19db2b 20 * THE SOFTWARE.
kstech 0:e2b0ee19db2b 21 */
kstech 0:e2b0ee19db2b 22
kstech 0:e2b0ee19db2b 23 #include "TextLCD.h"
kstech 0:e2b0ee19db2b 24 #include "mbed.h"
kstech 0:e2b0ee19db2b 25
kstech 0:e2b0ee19db2b 26 TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1,
kstech 0:e2b0ee19db2b 27 PinName d2, PinName d3, LCDType type) : _rs(rs),
kstech 0:e2b0ee19db2b 28 _e(e), _d(d0, d1, d2, d3),
kstech 0:e2b0ee19db2b 29 _type(type) {
kstech 0:e2b0ee19db2b 30
kstech 0:e2b0ee19db2b 31 _e = 1;
kstech 0:e2b0ee19db2b 32 _rs = 0; // command mode
kstech 0:e2b0ee19db2b 33
kstech 0:e2b0ee19db2b 34 wait(0.015); // Wait 15ms to ensure powered up
kstech 0:e2b0ee19db2b 35
kstech 0:e2b0ee19db2b 36 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
kstech 0:e2b0ee19db2b 37 for (int i=0; i<3; i++) {
kstech 0:e2b0ee19db2b 38 writeByte(0x3);
kstech 0:e2b0ee19db2b 39 wait(0.00164); // this command takes 1.64ms, so wait for it
kstech 0:e2b0ee19db2b 40 }
kstech 0:e2b0ee19db2b 41 writeByte(0x2); // 4-bit mode
kstech 0:e2b0ee19db2b 42 wait(0.000040f); // most instructions take 40us
kstech 0:e2b0ee19db2b 43
kstech 0:e2b0ee19db2b 44 writeCommand(0x28); // Function set 001 BW N F - -
kstech 0:e2b0ee19db2b 45 writeCommand(0x0C);
kstech 0:e2b0ee19db2b 46 writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
kstech 0:e2b0ee19db2b 47 cls();
kstech 0:e2b0ee19db2b 48 }
kstech 0:e2b0ee19db2b 49
kstech 0:e2b0ee19db2b 50 void TextLCD::character(int column, int row, int c) {
kstech 0:e2b0ee19db2b 51 int a = address(column, row);
kstech 0:e2b0ee19db2b 52 writeCommand(a);
kstech 0:e2b0ee19db2b 53 writeData(c);
kstech 0:e2b0ee19db2b 54 }
kstech 0:e2b0ee19db2b 55
kstech 0:e2b0ee19db2b 56 void TextLCD::cls() {
kstech 0:e2b0ee19db2b 57 writeCommand(0x01); // cls, and set cursor to 0
kstech 0:e2b0ee19db2b 58 wait(0.00164f); // This command takes 1.64 ms
kstech 0:e2b0ee19db2b 59 locate(0, 0);
kstech 0:e2b0ee19db2b 60 }
kstech 0:e2b0ee19db2b 61
kstech 0:e2b0ee19db2b 62 void TextLCD::locate(int column, int row) {
kstech 0:e2b0ee19db2b 63 _column = column;
kstech 0:e2b0ee19db2b 64 _row = row;
kstech 0:e2b0ee19db2b 65 }
kstech 0:e2b0ee19db2b 66
kstech 0:e2b0ee19db2b 67 int TextLCD::_putc(int value) {
kstech 0:e2b0ee19db2b 68 if (value == '\n') {
kstech 0:e2b0ee19db2b 69 _column = 0;
kstech 0:e2b0ee19db2b 70 _row++;
kstech 0:e2b0ee19db2b 71 if (_row >= rows()) {
kstech 0:e2b0ee19db2b 72 _row = 0;
kstech 0:e2b0ee19db2b 73 }
kstech 0:e2b0ee19db2b 74 } else {
kstech 0:e2b0ee19db2b 75 character(_column, _row, value);
kstech 0:e2b0ee19db2b 76 _column++;
kstech 0:e2b0ee19db2b 77 if (_column >= columns()) {
kstech 0:e2b0ee19db2b 78 _column = 0;
kstech 0:e2b0ee19db2b 79 _row++;
kstech 0:e2b0ee19db2b 80 if (_row >= rows()) {
kstech 0:e2b0ee19db2b 81 _row = 0;
kstech 0:e2b0ee19db2b 82 }
kstech 0:e2b0ee19db2b 83 }
kstech 0:e2b0ee19db2b 84 }
kstech 0:e2b0ee19db2b 85 return value;
kstech 0:e2b0ee19db2b 86 }
kstech 0:e2b0ee19db2b 87
kstech 0:e2b0ee19db2b 88 int TextLCD::_getc() {
kstech 0:e2b0ee19db2b 89 return -1;
kstech 0:e2b0ee19db2b 90 }
kstech 0:e2b0ee19db2b 91
kstech 0:e2b0ee19db2b 92 void TextLCD::writeByte(int value) {
kstech 0:e2b0ee19db2b 93 _d = value >> 4;
kstech 0:e2b0ee19db2b 94 wait(0.000040f); // most instructions take 40us
kstech 0:e2b0ee19db2b 95 _e = 0;
kstech 0:e2b0ee19db2b 96 wait(0.000040f);
kstech 0:e2b0ee19db2b 97 _e = 1;
kstech 0:e2b0ee19db2b 98 _d = value >> 0;
kstech 0:e2b0ee19db2b 99 wait(0.000040f);
kstech 0:e2b0ee19db2b 100 _e = 0;
kstech 0:e2b0ee19db2b 101 wait(0.000040f); // most instructions take 40us
kstech 0:e2b0ee19db2b 102 _e = 1;
kstech 0:e2b0ee19db2b 103 }
kstech 0:e2b0ee19db2b 104
kstech 0:e2b0ee19db2b 105 void TextLCD::writeCommand(int command) {
kstech 0:e2b0ee19db2b 106 _rs = 0;
kstech 0:e2b0ee19db2b 107 writeByte(command);
kstech 0:e2b0ee19db2b 108 }
kstech 0:e2b0ee19db2b 109
kstech 0:e2b0ee19db2b 110 void TextLCD::writeData(int data) {
kstech 0:e2b0ee19db2b 111 _rs = 1;
kstech 0:e2b0ee19db2b 112 writeByte(data);
kstech 0:e2b0ee19db2b 113 }
kstech 0:e2b0ee19db2b 114
kstech 0:e2b0ee19db2b 115 int TextLCD::address(int column, int row) {
kstech 0:e2b0ee19db2b 116 switch (_type) {
kstech 0:e2b0ee19db2b 117 case LCD20x4:
kstech 0:e2b0ee19db2b 118 switch (row) {
kstech 0:e2b0ee19db2b 119 case 0:
kstech 0:e2b0ee19db2b 120 return 0x80 + column;
kstech 0:e2b0ee19db2b 121 case 1:
kstech 0:e2b0ee19db2b 122 return 0xc0 + column;
kstech 0:e2b0ee19db2b 123 case 2:
kstech 0:e2b0ee19db2b 124 return 0x94 + column;
kstech 0:e2b0ee19db2b 125 case 3:
kstech 0:e2b0ee19db2b 126 return 0xd4 + column;
kstech 0:e2b0ee19db2b 127 }
kstech 0:e2b0ee19db2b 128 case LCD16x2B:
kstech 0:e2b0ee19db2b 129 return 0x80 + (row * 40) + column;
kstech 0:e2b0ee19db2b 130 case LCD16x2:
kstech 0:e2b0ee19db2b 131 case LCD20x2:
kstech 0:e2b0ee19db2b 132 default:
kstech 0:e2b0ee19db2b 133 return 0x80 + (row * 0x40) + column;
kstech 0:e2b0ee19db2b 134 }
kstech 0:e2b0ee19db2b 135 }
kstech 0:e2b0ee19db2b 136
kstech 0:e2b0ee19db2b 137 int TextLCD::columns() {
kstech 0:e2b0ee19db2b 138 switch (_type) {
kstech 0:e2b0ee19db2b 139 case LCD20x4:
kstech 0:e2b0ee19db2b 140 case LCD20x2:
kstech 0:e2b0ee19db2b 141 return 20;
kstech 0:e2b0ee19db2b 142 case LCD16x2:
kstech 0:e2b0ee19db2b 143 case LCD16x2B:
kstech 0:e2b0ee19db2b 144 default:
kstech 0:e2b0ee19db2b 145 return 16;
kstech 0:e2b0ee19db2b 146 }
kstech 0:e2b0ee19db2b 147 }
kstech 0:e2b0ee19db2b 148
kstech 0:e2b0ee19db2b 149 int TextLCD::rows() {
kstech 0:e2b0ee19db2b 150 switch (_type) {
kstech 0:e2b0ee19db2b 151 case LCD20x4:
kstech 0:e2b0ee19db2b 152 return 4;
kstech 0:e2b0ee19db2b 153 case LCD16x2:
kstech 0:e2b0ee19db2b 154 case LCD16x2B:
kstech 0:e2b0ee19db2b 155 case LCD20x2:
kstech 0:e2b0ee19db2b 156 default:
kstech 0:e2b0ee19db2b 157 return 2;
kstech 0:e2b0ee19db2b 158 }
kstech 0:e2b0ee19db2b 159 }