Jacques Pelletier / Mbed 2 deprecated Reflow_oven_controller

This is a Reflow Oven Controller ported to the mbed platform Original article: http://www.circuitcellar.com/renesas/winners/Abstracts/H3323%20abstract.pdf

Dependencies:   mbed

TextLCD/TextLCD.cpp@0:9526e71a200f, 2012-01-15 (annotated)

Committer:
jpelletier
Date:
Sun Jan 15 06:13:50 2012 +0000
Revision:
0:9526e71a200f
This port compiles but I haven\t tested it on hardware yet. There may be some adjustments to the LCD commands to be done.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jpelletier 0:9526e71a200f 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
jpelletier 0:9526e71a200f 2 * Copyright (c) 2007-2010, sford, http://mbed.org
jpelletier 0:9526e71a200f 3 *
jpelletier 0:9526e71a200f 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
jpelletier 0:9526e71a200f 5 * of this software and associated documentation files (the "Software"), to deal
jpelletier 0:9526e71a200f 6 * in the Software without restriction, including without limitation the rights
jpelletier 0:9526e71a200f 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
jpelletier 0:9526e71a200f 8 * copies of the Software, and to permit persons to whom the Software is
jpelletier 0:9526e71a200f 9 * furnished to do so, subject to the following conditions:
jpelletier 0:9526e71a200f 10 *
jpelletier 0:9526e71a200f 11 * The above copyright notice and this permission notice shall be included in
jpelletier 0:9526e71a200f 12 * all copies or substantial portions of the Software.
jpelletier 0:9526e71a200f 13 *
jpelletier 0:9526e71a200f 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
jpelletier 0:9526e71a200f 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
jpelletier 0:9526e71a200f 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
jpelletier 0:9526e71a200f 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
jpelletier 0:9526e71a200f 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jpelletier 0:9526e71a200f 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
jpelletier 0:9526e71a200f 20 * THE SOFTWARE.
jpelletier 0:9526e71a200f 21 */
jpelletier 0:9526e71a200f 22
jpelletier 0:9526e71a200f 23 #include "TextLCD.h"
jpelletier 0:9526e71a200f 24 #include "mbed.h"
jpelletier 0:9526e71a200f 25
jpelletier 0:9526e71a200f 26 TextLCD::TextLCD(PinName rs, PinName e, PinName d4, PinName d5,
jpelletier 0:9526e71a200f 27 PinName d6, PinName d7, LCDType type) : _rs(rs),
jpelletier 0:9526e71a200f 28 _e(e), _d(d4, d5, d6, d7),
jpelletier 0:9526e71a200f 29 _type(type) {
jpelletier 0:9526e71a200f 30
jpelletier 0:9526e71a200f 31 _e = 1;
jpelletier 0:9526e71a200f 32 _rs = 0; // command mode
jpelletier 0:9526e71a200f 33
jpelletier 0:9526e71a200f 34 wait(0.015); // Wait 15ms to ensure powered up
jpelletier 0:9526e71a200f 35
jpelletier 0:9526e71a200f 36 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
jpelletier 0:9526e71a200f 37 for (int i=0; i<3; i++) {
jpelletier 0:9526e71a200f 38 writeByte(0x3);
jpelletier 0:9526e71a200f 39 wait(0.00164); // this command takes 1.64ms, so wait for it
jpelletier 0:9526e71a200f 40 }
jpelletier 0:9526e71a200f 41 writeByte(0x2); // 4-bit mode
jpelletier 0:9526e71a200f 42 wait(0.000040f); // most instructions take 40us
jpelletier 0:9526e71a200f 43
jpelletier 0:9526e71a200f 44 writeCommand(0x28); // Function set 001 BW N F - -
jpelletier 0:9526e71a200f 45 writeCommand(0x0C);
jpelletier 0:9526e71a200f 46 writeCommand(0x6); // Cursor Direction and Display Shift : 0000 01 CD S (CD 0-left, 1-right S(hift) 0-no, 1-yes
jpelletier 0:9526e71a200f 47 cls();
jpelletier 0:9526e71a200f 48 }
jpelletier 0:9526e71a200f 49
jpelletier 0:9526e71a200f 50 void TextLCD::character(int column, int row, int c) {
jpelletier 0:9526e71a200f 51 int a = address(column, row);
jpelletier 0:9526e71a200f 52 writeCommand(a);
jpelletier 0:9526e71a200f 53 writeData(c);
jpelletier 0:9526e71a200f 54 }
jpelletier 0:9526e71a200f 55
jpelletier 0:9526e71a200f 56 void TextLCD::cls() {
jpelletier 0:9526e71a200f 57 writeCommand(0x01); // cls, and set cursor to 0
jpelletier 0:9526e71a200f 58 wait(0.00164f); // This command takes 1.64 ms
jpelletier 0:9526e71a200f 59 locate(0, 0);
jpelletier 0:9526e71a200f 60 }
jpelletier 0:9526e71a200f 61
jpelletier 0:9526e71a200f 62 void TextLCD::locate(int column, int row) {
jpelletier 0:9526e71a200f 63 _column = column;
jpelletier 0:9526e71a200f 64 _row = row;
jpelletier 0:9526e71a200f 65 }
jpelletier 0:9526e71a200f 66
jpelletier 0:9526e71a200f 67 int TextLCD::_putc(int value) {
jpelletier 0:9526e71a200f 68 if (value == '\n') {
jpelletier 0:9526e71a200f 69 _column = 0;
jpelletier 0:9526e71a200f 70 _row++;
jpelletier 0:9526e71a200f 71 if (_row >= rows()) {
jpelletier 0:9526e71a200f 72 _row = 0;
jpelletier 0:9526e71a200f 73 }
jpelletier 0:9526e71a200f 74 } else {
jpelletier 0:9526e71a200f 75 character(_column, _row, value);
jpelletier 0:9526e71a200f 76 _column++;
jpelletier 0:9526e71a200f 77 if (_column >= columns()) {
jpelletier 0:9526e71a200f 78 _column = 0;
jpelletier 0:9526e71a200f 79 _row++;
jpelletier 0:9526e71a200f 80 if (_row >= rows()) {
jpelletier 0:9526e71a200f 81 _row = 0;
jpelletier 0:9526e71a200f 82 }
jpelletier 0:9526e71a200f 83 }
jpelletier 0:9526e71a200f 84 }
jpelletier 0:9526e71a200f 85 return value;
jpelletier 0:9526e71a200f 86 }
jpelletier 0:9526e71a200f 87
jpelletier 0:9526e71a200f 88 int TextLCD::_getc() {
jpelletier 0:9526e71a200f 89 return -1;
jpelletier 0:9526e71a200f 90 }
jpelletier 0:9526e71a200f 91
jpelletier 0:9526e71a200f 92 void TextLCD::writeByte(int value) {
jpelletier 0:9526e71a200f 93 _d = value >> 4;
jpelletier 0:9526e71a200f 94 wait(0.000040f); // most instructions take 40us
jpelletier 0:9526e71a200f 95 _e = 0;
jpelletier 0:9526e71a200f 96 wait(0.000040f);
jpelletier 0:9526e71a200f 97 _e = 1;
jpelletier 0:9526e71a200f 98 _d = value >> 0;
jpelletier 0:9526e71a200f 99 wait(0.000040f);
jpelletier 0:9526e71a200f 100 _e = 0;
jpelletier 0:9526e71a200f 101 wait(0.000040f); // most instructions take 40us
jpelletier 0:9526e71a200f 102 _e = 1;
jpelletier 0:9526e71a200f 103 }
jpelletier 0:9526e71a200f 104
jpelletier 0:9526e71a200f 105 void TextLCD::writeCommand(int command) {
jpelletier 0:9526e71a200f 106 _rs = 0;
jpelletier 0:9526e71a200f 107 writeByte(command);
jpelletier 0:9526e71a200f 108 }
jpelletier 0:9526e71a200f 109
jpelletier 0:9526e71a200f 110 void TextLCD::writeData(int data) {
jpelletier 0:9526e71a200f 111 _rs = 1;
jpelletier 0:9526e71a200f 112 writeByte(data);
jpelletier 0:9526e71a200f 113 }
jpelletier 0:9526e71a200f 114
jpelletier 0:9526e71a200f 115 int TextLCD::address(int column, int row) {
jpelletier 0:9526e71a200f 116 switch (_type) {
jpelletier 0:9526e71a200f 117 case LCD20x4:
jpelletier 0:9526e71a200f 118 switch (row) {
jpelletier 0:9526e71a200f 119 case 0:
jpelletier 0:9526e71a200f 120 return 0x80 + column;
jpelletier 0:9526e71a200f 121 case 1:
jpelletier 0:9526e71a200f 122 return 0xc0 + column;
jpelletier 0:9526e71a200f 123 case 2:
jpelletier 0:9526e71a200f 124 return 0x94 + column;
jpelletier 0:9526e71a200f 125 case 3:
jpelletier 0:9526e71a200f 126 return 0xd4 + column;
jpelletier 0:9526e71a200f 127 }
jpelletier 0:9526e71a200f 128 case LCD16x2B:
jpelletier 0:9526e71a200f 129 return 0x80 + (row * 40) + column;
jpelletier 0:9526e71a200f 130 case LCD16x2:
jpelletier 0:9526e71a200f 131 case LCD20x2:
jpelletier 0:9526e71a200f 132 default:
jpelletier 0:9526e71a200f 133 return 0x80 + (row * 0x40) + column;
jpelletier 0:9526e71a200f 134 }
jpelletier 0:9526e71a200f 135 }
jpelletier 0:9526e71a200f 136
jpelletier 0:9526e71a200f 137 int TextLCD::columns() {
jpelletier 0:9526e71a200f 138 switch (_type) {
jpelletier 0:9526e71a200f 139 case LCD20x4:
jpelletier 0:9526e71a200f 140 case LCD20x2:
jpelletier 0:9526e71a200f 141 return 20;
jpelletier 0:9526e71a200f 142 case LCD16x2:
jpelletier 0:9526e71a200f 143 case LCD16x2B:
jpelletier 0:9526e71a200f 144 default:
jpelletier 0:9526e71a200f 145 return 16;
jpelletier 0:9526e71a200f 146 }
jpelletier 0:9526e71a200f 147 }
jpelletier 0:9526e71a200f 148
jpelletier 0:9526e71a200f 149 int TextLCD::rows() {
jpelletier 0:9526e71a200f 150 switch (_type) {
jpelletier 0:9526e71a200f 151 case LCD20x4:
jpelletier 0:9526e71a200f 152 return 4;
jpelletier 0:9526e71a200f 153 case LCD16x2:
jpelletier 0:9526e71a200f 154 case LCD16x2B:
jpelletier 0:9526e71a200f 155 case LCD20x2:
jpelletier 0:9526e71a200f 156 default:
jpelletier 0:9526e71a200f 157 return 2;
jpelletier 0:9526e71a200f 158 }
jpelletier 0:9526e71a200f 159 }