nikos chalikias / Mbed 2 deprecated n-bed_LCD_ADC_RTC

testing n-bed

Dependencies:   mbed

TextLCD.cpp@2:50bd6c03049b, 2015-04-27 (annotated)

Committer:
chalikias
Date:
Mon Apr 27 19:50:41 2015 +0000
Revision:
2:50bd6c03049b
Parent:
0:8cd63f1ec3c9 
testing n-Bed LCD, RTC and ADC

Who changed what in which revision?

UserRevisionLine numberNew contents of line
chalikias 0:8cd63f1ec3c9 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
chalikias 0:8cd63f1ec3c9 2 * Copyright (c) 2007-2010, sford
chalikias 0:8cd63f1ec3c9 3 *
chalikias 0:8cd63f1ec3c9 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
chalikias 0:8cd63f1ec3c9 5 * of this software and associated documentation files (the "Software"), to deal
chalikias 0:8cd63f1ec3c9 6 * in the Software without restriction, including without limitation the rights
chalikias 0:8cd63f1ec3c9 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
chalikias 0:8cd63f1ec3c9 8 * copies of the Software, and to permit persons to whom the Software is
chalikias 0:8cd63f1ec3c9 9 * furnished to do so, subject to the following conditions:
chalikias 0:8cd63f1ec3c9 10 *
chalikias 0:8cd63f1ec3c9 11 * The above copyright notice and this permission notice shall be included in
chalikias 0:8cd63f1ec3c9 12 * all copies or substantial portions of the Software.
chalikias 0:8cd63f1ec3c9 13 *
chalikias 0:8cd63f1ec3c9 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
chalikias 0:8cd63f1ec3c9 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
chalikias 0:8cd63f1ec3c9 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
chalikias 0:8cd63f1ec3c9 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
chalikias 0:8cd63f1ec3c9 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
chalikias 0:8cd63f1ec3c9 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
chalikias 0:8cd63f1ec3c9 20 * THE SOFTWARE.
chalikias 0:8cd63f1ec3c9 21 */
chalikias 0:8cd63f1ec3c9 22
chalikias 0:8cd63f1ec3c9 23 #include "TextLCD.h"
chalikias 0:8cd63f1ec3c9 24 #include "mbed.h"
chalikias 0:8cd63f1ec3c9 25
chalikias 0:8cd63f1ec3c9 26 TextLCD::TextLCD(PinName rs, PinName e, PinName d0, PinName d1,
chalikias 0:8cd63f1ec3c9 27 PinName d2, PinName d3, LCDType type) : _rs(rs),
chalikias 0:8cd63f1ec3c9 28 _e(e), _d(d0, d1, d2, d3),
chalikias 0:8cd63f1ec3c9 29 _type(type) {
chalikias 0:8cd63f1ec3c9 30
chalikias 0:8cd63f1ec3c9 31 _e = 1;
chalikias 0:8cd63f1ec3c9 32 _rs = 0; // command mode
chalikias 0:8cd63f1ec3c9 33
chalikias 0:8cd63f1ec3c9 34 wait(0.015); // Wait 15ms to ensure powered up
chalikias 0:8cd63f1ec3c9 35
chalikias 0:8cd63f1ec3c9 36 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
chalikias 0:8cd63f1ec3c9 37 for (int i=0; i<3; i++) {
chalikias 0:8cd63f1ec3c9 38 writeByte(0x3);
chalikias 0:8cd63f1ec3c9 39 wait(0.00164); // this command takes 1.64ms, so wait for it
chalikias 0:8cd63f1ec3c9 40 }
chalikias 0:8cd63f1ec3c9 41 writeByte(0x2); // 4-bit mode
chalikias 0:8cd63f1ec3c9 42 wait(0.000040f); // most instructions take 40us
chalikias 0:8cd63f1ec3c9 43
chalikias 0:8cd63f1ec3c9 44 writeCommand(0x28); // Function set 001 BW N F - -
chalikias 0:8cd63f1ec3c9 45 writeCommand(0x0C);
chalikias 0:8cd63f1ec3c9 46 writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
chalikias 0:8cd63f1ec3c9 47 cls();
chalikias 0:8cd63f1ec3c9 48 }
chalikias 0:8cd63f1ec3c9 49
chalikias 0:8cd63f1ec3c9 50 void TextLCD::character(int column, int row, int c) {
chalikias 0:8cd63f1ec3c9 51 int a = address(column, row);
chalikias 0:8cd63f1ec3c9 52 writeCommand(a);
chalikias 0:8cd63f1ec3c9 53 writeData(c);
chalikias 0:8cd63f1ec3c9 54 }
chalikias 0:8cd63f1ec3c9 55
chalikias 0:8cd63f1ec3c9 56 void TextLCD::cls() {
chalikias 0:8cd63f1ec3c9 57 writeCommand(0x01); // cls, and set cursor to 0
chalikias 0:8cd63f1ec3c9 58 wait(0.00164f); // This command takes 1.64 ms
chalikias 0:8cd63f1ec3c9 59 locate(0, 0);
chalikias 0:8cd63f1ec3c9 60 }
chalikias 0:8cd63f1ec3c9 61
chalikias 0:8cd63f1ec3c9 62 void TextLCD::locate(int column, int row) {
chalikias 0:8cd63f1ec3c9 63 _column = column;
chalikias 0:8cd63f1ec3c9 64 _row = row;
chalikias 0:8cd63f1ec3c9 65 }
chalikias 0:8cd63f1ec3c9 66
chalikias 0:8cd63f1ec3c9 67 int TextLCD::_putc(int value) {
chalikias 0:8cd63f1ec3c9 68 if (value == '\n') {
chalikias 0:8cd63f1ec3c9 69 _column = 0;
chalikias 0:8cd63f1ec3c9 70 _row++;
chalikias 0:8cd63f1ec3c9 71 if (_row >= rows()) {
chalikias 0:8cd63f1ec3c9 72 _row = 0;
chalikias 0:8cd63f1ec3c9 73 }
chalikias 0:8cd63f1ec3c9 74 } else {
chalikias 0:8cd63f1ec3c9 75 character(_column, _row, value);
chalikias 0:8cd63f1ec3c9 76 _column++;
chalikias 0:8cd63f1ec3c9 77 if (_column >= columns()) {
chalikias 0:8cd63f1ec3c9 78 _column = 0;
chalikias 0:8cd63f1ec3c9 79 _row++;
chalikias 0:8cd63f1ec3c9 80 if (_row >= rows()) {
chalikias 0:8cd63f1ec3c9 81 _row = 0;
chalikias 0:8cd63f1ec3c9 82 }
chalikias 0:8cd63f1ec3c9 83 }
chalikias 0:8cd63f1ec3c9 84 }
chalikias 0:8cd63f1ec3c9 85 return value;
chalikias 0:8cd63f1ec3c9 86 }
chalikias 0:8cd63f1ec3c9 87
chalikias 0:8cd63f1ec3c9 88 int TextLCD::_getc() {
chalikias 0:8cd63f1ec3c9 89 return -1;
chalikias 0:8cd63f1ec3c9 90 }
chalikias 0:8cd63f1ec3c9 91
chalikias 0:8cd63f1ec3c9 92 void TextLCD::writeByte(int value) {
chalikias 0:8cd63f1ec3c9 93 _d = value >> 4;
chalikias 0:8cd63f1ec3c9 94 wait(0.000040f); // most instructions take 40us
chalikias 0:8cd63f1ec3c9 95 _e = 0;
chalikias 0:8cd63f1ec3c9 96 wait(0.000040f);
chalikias 0:8cd63f1ec3c9 97 _e = 1;
chalikias 0:8cd63f1ec3c9 98 _d = value >> 0;
chalikias 0:8cd63f1ec3c9 99 wait(0.000040f);
chalikias 0:8cd63f1ec3c9 100 _e = 0;
chalikias 0:8cd63f1ec3c9 101 wait(0.000040f); // most instructions take 40us
chalikias 0:8cd63f1ec3c9 102 _e = 1;
chalikias 0:8cd63f1ec3c9 103 }
chalikias 0:8cd63f1ec3c9 104
chalikias 0:8cd63f1ec3c9 105 void TextLCD::writeCommand(int command) {
chalikias 0:8cd63f1ec3c9 106 _rs = 0;
chalikias 0:8cd63f1ec3c9 107 writeByte(command);
chalikias 0:8cd63f1ec3c9 108 }
chalikias 0:8cd63f1ec3c9 109
chalikias 0:8cd63f1ec3c9 110 void TextLCD::writeData(int data) {
chalikias 0:8cd63f1ec3c9 111 _rs = 1;
chalikias 0:8cd63f1ec3c9 112 writeByte(data);
chalikias 0:8cd63f1ec3c9 113 }
chalikias 0:8cd63f1ec3c9 114
chalikias 0:8cd63f1ec3c9 115 int TextLCD::address(int column, int row) {
chalikias 0:8cd63f1ec3c9 116 switch (_type) {
chalikias 0:8cd63f1ec3c9 117 case LCD20x4:
chalikias 0:8cd63f1ec3c9 118 switch (row) {
chalikias 0:8cd63f1ec3c9 119 case 0:
chalikias 0:8cd63f1ec3c9 120 return 0x80 + column;
chalikias 0:8cd63f1ec3c9 121 case 1:
chalikias 0:8cd63f1ec3c9 122 return 0xc0 + column;
chalikias 0:8cd63f1ec3c9 123 case 2:
chalikias 0:8cd63f1ec3c9 124 return 0x94 + column;
chalikias 0:8cd63f1ec3c9 125 case 3:
chalikias 0:8cd63f1ec3c9 126 return 0xd4 + column;
chalikias 0:8cd63f1ec3c9 127 }
chalikias 0:8cd63f1ec3c9 128 case LCD16x2B:
chalikias 0:8cd63f1ec3c9 129 return 0x80 + (row * 40) + column;
chalikias 0:8cd63f1ec3c9 130 case LCD16x2:
chalikias 0:8cd63f1ec3c9 131 case LCD20x2:
chalikias 0:8cd63f1ec3c9 132 default:
chalikias 0:8cd63f1ec3c9 133 return 0x80 + (row * 0x40) + column;
chalikias 0:8cd63f1ec3c9 134 }
chalikias 0:8cd63f1ec3c9 135 }
chalikias 0:8cd63f1ec3c9 136
chalikias 0:8cd63f1ec3c9 137 int TextLCD::columns() {
chalikias 0:8cd63f1ec3c9 138 switch (_type) {
chalikias 0:8cd63f1ec3c9 139 case LCD20x4:
chalikias 0:8cd63f1ec3c9 140 case LCD20x2:
chalikias 0:8cd63f1ec3c9 141 return 20;
chalikias 0:8cd63f1ec3c9 142 case LCD16x2:
chalikias 0:8cd63f1ec3c9 143 case LCD16x2B:
chalikias 0:8cd63f1ec3c9 144 default:
chalikias 0:8cd63f1ec3c9 145 return 16;
chalikias 0:8cd63f1ec3c9 146 }
chalikias 0:8cd63f1ec3c9 147 }
chalikias 0:8cd63f1ec3c9 148
chalikias 0:8cd63f1ec3c9 149 int TextLCD::rows() {
chalikias 0:8cd63f1ec3c9 150 switch (_type) {
chalikias 0:8cd63f1ec3c9 151 case LCD20x4:
chalikias 0:8cd63f1ec3c9 152 return 4;
chalikias 0:8cd63f1ec3c9 153 case LCD16x2:
chalikias 0:8cd63f1ec3c9 154 case LCD16x2B:
chalikias 0:8cd63f1ec3c9 155 case LCD20x2:
chalikias 0:8cd63f1ec3c9 156 default:
chalikias 0:8cd63f1ec3c9 157 return 2;
chalikias 0:8cd63f1ec3c9 158 }
chalikias 0:8cd63f1ec3c9 159 }