Paul van der Wielen / Mbed 2 deprecated lc_display

Yet another I2C Text based LCD display program

Dependencies:   mbed

lc_display.h@1:d8767e2b8e7e, 2011-03-09 (annotated)

Committer:
pwheels
Date:
Wed Mar 09 07:05:29 2011 +0000
Revision:
1:d8767e2b8e7e
Parent:
0:551f3dbd553c
Child:
2:91dec3d7903a
version 1.1 (removed break statement in case of \Delete\ mode)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pwheels 0:551f3dbd553c 1 /*
pwheels 0:551f3dbd553c 2 * Copyright (c) 2011 Paul van der Wielen, Pro-Serv
pwheels 0:551f3dbd553c 3 *
pwheels 0:551f3dbd553c 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
pwheels 0:551f3dbd553c 5 * of this software and associated documentation files (the "Software"), to use
pwheels 0:551f3dbd553c 6 * and implement the software for none commercial reason and usage only and
pwheels 0:551f3dbd553c 7 * subject to the following conditions:
pwheels 0:551f3dbd553c 8 *
pwheels 0:551f3dbd553c 9 * The above copyright notice and this permission notice shall be included in
pwheels 0:551f3dbd553c 10 * all copies or substantial portions of the Software.
pwheels 0:551f3dbd553c 11 *
pwheels 0:551f3dbd553c 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
pwheels 0:551f3dbd553c 13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
pwheels 0:551f3dbd553c 14 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
pwheels 0:551f3dbd553c 15 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
pwheels 0:551f3dbd553c 16 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
pwheels 0:551f3dbd553c 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
pwheels 0:551f3dbd553c 18 * THE SOFTWARE.
pwheels 0:551f3dbd553c 19 *
pwheels 0:551f3dbd553c 20 * Usage and assumptions:
pwheels 0:551f3dbd553c 21 * coding as to interface an I2C LC Display modle available from:
pwheels 0:551f3dbd553c 22 * Coptonix GmbH
pwheels 0:551f3dbd553c 23 * Berlin 24.06.2008by @ less than Euro 13.-
pwheels 0:551f3dbd553c 24 * which will interface to various HD44780 based units, 8Bit-Interface (16x2 or 20x4)
pwheels 0:551f3dbd553c 25 *
pwheels 0:551f3dbd553c 26 * Used device = LPC1768
pwheels 0:551f3dbd553c 27 */
pwheels 0:551f3dbd553c 28 #include "mbed.h"
pwheels 0:551f3dbd553c 29
pwheels 0:551f3dbd553c 30 #define I2C_ADDR 0xfe
pwheels 0:551f3dbd553c 31 #define I2C_SPEED 400000
pwheels 0:551f3dbd553c 32
pwheels 0:551f3dbd553c 33 #define ClrDisplay 0x61
pwheels 0:551f3dbd553c 34 #define ReturnHome 0x62
pwheels 0:551f3dbd553c 35 #define SetCursor 0x63
pwheels 0:551f3dbd553c 36 #define CharToLCD 0x64
pwheels 0:551f3dbd553c 37 #define CMDToLCD 0x65
pwheels 0:551f3dbd553c 38 #define Delete 0x66
pwheels 0:551f3dbd553c 39 #define CopyToClipBoard 0x67
pwheels 0:551f3dbd553c 40 #define Paste 0x68
pwheels 0:551f3dbd553c 41 #define GetCursorAdr 0x69
pwheels 0:551f3dbd553c 42 #define GetCharAtCur 0x6a
pwheels 0:551f3dbd553c 43 #define ReadRam 0x6b
pwheels 0:551f3dbd553c 44 #define DisplayON_OFF 0x6c
pwheels 0:551f3dbd553c 45 #define Shift 0x6d
pwheels 0:551f3dbd553c 46 #define SetEntryMode 0x6e
pwheels 0:551f3dbd553c 47 #define SetFunction 0x6f
pwheels 0:551f3dbd553c 48 #define SetCGRAMAdr 0x70
pwheels 0:551f3dbd553c 49 #define SetGGRAMAdr 0x71
pwheels 0:551f3dbd553c 50 #define SaveLCDIni 0x73
pwheels 0:551f3dbd553c 51 #define WriteUserDefChar 0x74
pwheels 0:551f3dbd553c 52 #define SaveUserDefChr 0x75
pwheels 0:551f3dbd553c 53 #define WriteString 0x76
pwheels 0:551f3dbd553c 54 #define LCDType 0x77
pwheels 0:551f3dbd553c 55
pwheels 1:d8767e2b8e7e 56 I2C i2c(p28, p27);
pwheels 0:551f3dbd553c 57
pwheels 0:551f3dbd553c 58 void _InitLCD();
pwheels 0:551f3dbd553c 59 int _ReadLCD(int Cmd);
pwheels 0:551f3dbd553c 60 void _WriteLCD(int Cmd, int par1, int par2, int par3);
pwheels 0:551f3dbd553c 61 void _WriteLCD(int Cmd, int par1, int par2);
pwheels 0:551f3dbd553c 62 void _WriteLCD(int Cmd, int par1);
pwheels 0:551f3dbd553c 63 void _WriteLCD(int Cmd);
pwheels 0:551f3dbd553c 64 void _WriteLCD(int Cmd, char *par1, int par2);
pwheels 0:551f3dbd553c 65
pwheels 0:551f3dbd553c 66 void _InitLCD() {
pwheels 0:551f3dbd553c 67 i2c.frequency(I2C_SPEED);
pwheels 0:551f3dbd553c 68 }
pwheels 0:551f3dbd553c 69
pwheels 0:551f3dbd553c 70 int _ReadLCD(int Cmd) {
pwheels 0:551f3dbd553c 71
pwheels 0:551f3dbd553c 72 int j = 50;
pwheels 0:551f3dbd553c 73
pwheels 0:551f3dbd553c 74 char data[2];
pwheels 0:551f3dbd553c 75 i2c.start();
pwheels 0:551f3dbd553c 76 i2c.write(I2C_ADDR);
pwheels 0:551f3dbd553c 77 i2c.write(Cmd & 0xff);
pwheels 0:551f3dbd553c 78 i2c.read(I2C_ADDR, data, 2);
pwheels 0:551f3dbd553c 79 i2c.stop();
pwheels 0:551f3dbd553c 80 wait_us(j);
pwheels 0:551f3dbd553c 81 return data[1];
pwheels 0:551f3dbd553c 82 }
pwheels 0:551f3dbd553c 83
pwheels 0:551f3dbd553c 84 void _WriteLCD(int Cmd, int par1, int par2, int par3) {
pwheels 0:551f3dbd553c 85
pwheels 0:551f3dbd553c 86 int j = 50;
pwheels 0:551f3dbd553c 87
pwheels 0:551f3dbd553c 88 i2c.start();
pwheels 0:551f3dbd553c 89 i2c.write(I2C_ADDR);
pwheels 0:551f3dbd553c 90 i2c.write(Cmd & 0xff); // Set Command
pwheels 0:551f3dbd553c 91 switch (Cmd) {
pwheels 0:551f3dbd553c 92 case DisplayON_OFF :
pwheels 0:551f3dbd553c 93 i2c.write(0x08 + ((par1 & 0x01) << 2) + ((par2 & 0x01) << 1) + (par3 & 0x01)); // 0x00/0x01 for display, cursor and blinking
pwheels 0:551f3dbd553c 94 break;
pwheels 0:551f3dbd553c 95 case SetFunction :
pwheels 0:551f3dbd553c 96 i2c.write(0x20 + ((par1 & 0x01) << 4) + ((par2 & 0x01) << 3) + ((par3 & 0x01) << 2)); // 0x00/0x01 for interface, lines and dots
pwheels 0:551f3dbd553c 97 break;
pwheels 0:551f3dbd553c 98 case Delete :
pwheels 0:551f3dbd553c 99 j = 1000;
pwheels 0:551f3dbd553c 100 case CopyToClipBoard :
pwheels 0:551f3dbd553c 101 i2c.write(par1); // line 1-4
pwheels 0:551f3dbd553c 102 i2c.write(par2); // position 1-20
pwheels 0:551f3dbd553c 103 i2c.write(par3); // count 1-20
pwheels 0:551f3dbd553c 104 break;
pwheels 0:551f3dbd553c 105 default :
pwheels 0:551f3dbd553c 106 break;
pwheels 0:551f3dbd553c 107 }
pwheels 0:551f3dbd553c 108
pwheels 0:551f3dbd553c 109 i2c.stop();
pwheels 0:551f3dbd553c 110 wait_us(j);
pwheels 0:551f3dbd553c 111 }
pwheels 0:551f3dbd553c 112
pwheels 0:551f3dbd553c 113 void _WriteLCD(int Cmd, int par1, int par2) {
pwheels 0:551f3dbd553c 114
pwheels 0:551f3dbd553c 115 int j = 50;
pwheels 0:551f3dbd553c 116
pwheels 0:551f3dbd553c 117 i2c.start();
pwheels 0:551f3dbd553c 118 i2c.write(I2C_ADDR);
pwheels 0:551f3dbd553c 119 i2c.write(Cmd & 0xff); // Set Command
pwheels 0:551f3dbd553c 120 switch (Cmd) {
pwheels 0:551f3dbd553c 121 case Shift :
pwheels 0:551f3dbd553c 122 i2c.write(0x10 + ((par1 & 0x01) << 3) + ((par2 & 0x01) << 2)); // 0x00/0x01 cursor or display, 0x00/0x01 left or right
pwheels 0:551f3dbd553c 123 break;
pwheels 0:551f3dbd553c 124 case SetEntryMode :
pwheels 0:551f3dbd553c 125 i2c.write(0x04 + ((par1 & 0x01) << 1) + (par2 & 0x01)); // 0x00/0x01 for cursor move (increase / decrease), display (shifted / not shifted)
pwheels 0:551f3dbd553c 126 break;
pwheels 0:551f3dbd553c 127 default :
pwheels 0:551f3dbd553c 128 break;
pwheels 0:551f3dbd553c 129 }
pwheels 0:551f3dbd553c 130
pwheels 0:551f3dbd553c 131 i2c.stop();
pwheels 0:551f3dbd553c 132 wait_us(j);
pwheels 0:551f3dbd553c 133 }
pwheels 0:551f3dbd553c 134
pwheels 0:551f3dbd553c 135 void _WriteLCD(int Cmd, int par1) {
pwheels 0:551f3dbd553c 136
pwheels 0:551f3dbd553c 137 int j = 50;
pwheels 0:551f3dbd553c 138
pwheels 0:551f3dbd553c 139 i2c.start();
pwheels 0:551f3dbd553c 140 i2c.write(I2C_ADDR);
pwheels 0:551f3dbd553c 141 i2c.write(Cmd & 0xff); // Set Command
pwheels 0:551f3dbd553c 142 switch (Cmd) {
pwheels 0:551f3dbd553c 143 case SetCursor :
pwheels 0:551f3dbd553c 144 j = 500;
pwheels 0:551f3dbd553c 145 case CharToLCD :
pwheels 0:551f3dbd553c 146 case CMDToLCD :
pwheels 0:551f3dbd553c 147 case SetCGRAMAdr :
pwheels 0:551f3dbd553c 148 case SetGGRAMAdr :
pwheels 0:551f3dbd553c 149 i2c.write(par1 & 0xff); // Put character at cursor position
pwheels 0:551f3dbd553c 150 break;
pwheels 0:551f3dbd553c 151 case SaveUserDefChr :
pwheels 0:551f3dbd553c 152 i2c.write(par1 & 0x07); // Save user defined character 0-7
pwheels 0:551f3dbd553c 153 break;
pwheels 0:551f3dbd553c 154 case LCDType :
pwheels 0:551f3dbd553c 155 i2c.write(par1 & 0x01); // set LCD type 0 = 4 x 16, 1 = 2 x 20
pwheels 0:551f3dbd553c 156 break;
pwheels 0:551f3dbd553c 157 default :
pwheels 0:551f3dbd553c 158 break;
pwheels 0:551f3dbd553c 159 }
pwheels 0:551f3dbd553c 160
pwheels 0:551f3dbd553c 161 i2c.stop();
pwheels 0:551f3dbd553c 162 wait_us(j);
pwheels 0:551f3dbd553c 163 }
pwheels 0:551f3dbd553c 164
pwheels 0:551f3dbd553c 165 void _WriteLCD(int Cmd) {
pwheels 0:551f3dbd553c 166
pwheels 0:551f3dbd553c 167 int j = 50;
pwheels 0:551f3dbd553c 168
pwheels 0:551f3dbd553c 169 i2c.start();
pwheels 0:551f3dbd553c 170 i2c.write(I2C_ADDR);
pwheels 0:551f3dbd553c 171 i2c.write(Cmd & 0xff); // Set Command
pwheels 0:551f3dbd553c 172 switch (Cmd) {
pwheels 0:551f3dbd553c 173 case ClrDisplay :
pwheels 0:551f3dbd553c 174 j = 2000;
pwheels 0:551f3dbd553c 175 break;
pwheels 0:551f3dbd553c 176 default :
pwheels 0:551f3dbd553c 177 break;
pwheels 0:551f3dbd553c 178 }
pwheels 0:551f3dbd553c 179 i2c.stop();
pwheels 0:551f3dbd553c 180 wait_us(j);
pwheels 0:551f3dbd553c 181 }
pwheels 0:551f3dbd553c 182
pwheels 0:551f3dbd553c 183 void _WriteLCD(int Cmd, char *par1, int par2) {
pwheels 0:551f3dbd553c 184
pwheels 0:551f3dbd553c 185 int i;
pwheels 0:551f3dbd553c 186 int j = 1000;
pwheels 0:551f3dbd553c 187
pwheels 0:551f3dbd553c 188 i2c.start();
pwheels 0:551f3dbd553c 189 i2c.write(I2C_ADDR);
pwheels 0:551f3dbd553c 190 i2c.write(Cmd & 0xff); // Set Command
pwheels 0:551f3dbd553c 191 for (i = 0; i < par2; i++) {
pwheels 0:551f3dbd553c 192 i2c.write(par1[i]);
pwheels 0:551f3dbd553c 193 }
pwheels 0:551f3dbd553c 194 i2c.stop();
pwheels 0:551f3dbd553c 195 wait_us(j);
pwheels 0:551f3dbd553c 196 }