Joachim Andersen / TextLCD

1

Dependents:   Program_R11

TextLCD.cpp@24:fb3399713710, 2014-05-10 (annotated)

Committer:
Sissors
Date:
Sat May 10 13:50:25 2014 +0000
Revision:
24:fb3399713710
Parent:
23:d47f226efb24
Child:
25:6162b31128c9
Added ST7032 support + SPI mode

Who changed what in which revision?

UserRevisionLine numberNew contents of line
simon 1:ac48b187213c 1 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
simon 6:e4cb7ddee0d3 2 * Copyright (c) 2007-2010, sford, http://mbed.org
wim 14:0c32b66b14b8 3 * 2013, v01: WH, Added LCD types, fixed LCD address issues, added Cursor and UDCs
wim 14:0c32b66b14b8 4 * 2013, v02: WH, Added I2C and SPI bus interfaces
wim 15:b70ebfffb258 5 * 2013, v03: WH, Added support for LCD40x4 which uses 2 controllers
wim 18:bd65dc10f27f 6 * 2013, v04: WH, Added support for Display On/Off, improved 4bit bootprocess
wim 18:bd65dc10f27f 7 * 2013, v05: WH, Added support for 8x2B, added some UDCs
wim 19:c747b9e2e7b8 8 * 2013, v06: WH, Added support for devices that use internal DC/DC converters
wim 20:e0da005a777f 9 * 2013, v07: WH, Added support for backlight and include portdefinitions for LCD2004 Module from DFROBOT
wim 22:35742ec80c24 10 * 2014, v08: WH, Refactored in Base and Derived Classes to deal with mbed lib change regarding 'NC' defined pins
simon 1:ac48b187213c 11 *
simon 1:ac48b187213c 12 * Permission is hereby granted, free of charge, to any person obtaining a copy
simon 1:ac48b187213c 13 * of this software and associated documentation files (the "Software"), to deal
simon 1:ac48b187213c 14 * in the Software without restriction, including without limitation the rights
simon 1:ac48b187213c 15 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
simon 1:ac48b187213c 16 * copies of the Software, and to permit persons to whom the Software is
simon 1:ac48b187213c 17 * furnished to do so, subject to the following conditions:
simon 1:ac48b187213c 18 *
simon 1:ac48b187213c 19 * The above copyright notice and this permission notice shall be included in
simon 1:ac48b187213c 20 * all copies or substantial portions of the Software.
simon 1:ac48b187213c 21 *
simon 1:ac48b187213c 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
simon 1:ac48b187213c 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
simon 1:ac48b187213c 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
simon 1:ac48b187213c 25 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
simon 1:ac48b187213c 26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
simon 1:ac48b187213c 27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
simon 1:ac48b187213c 28 * THE SOFTWARE.
simon 1:ac48b187213c 29 */
simon 1:ac48b187213c 30
simon 1:ac48b187213c 31 #include "TextLCD.h"
simon 1:ac48b187213c 32 #include "mbed.h"
simon 1:ac48b187213c 33
wim 21:9eb628d9e164 34 /** Create a TextLCD_Base interface
wim 15:b70ebfffb258 35 *
wim 21:9eb628d9e164 36 * @param type Sets the panel size/addressing mode (default = LCD16x2)
wim 21:9eb628d9e164 37 * @param ctrl LCD controller (default = HD44780)
wim 15:b70ebfffb258 38 */
wim 21:9eb628d9e164 39 TextLCD_Base::TextLCD_Base(LCDType type, LCDCtrl ctrl) : _type(type), _ctrl(ctrl) {
wim 14:0c32b66b14b8 40 }
wim 14:0c32b66b14b8 41
wim 14:0c32b66b14b8 42
wim 21:9eb628d9e164 43 /** Init the LCD Controller(s)
wim 21:9eb628d9e164 44 * Clear display
wim 21:9eb628d9e164 45 */
wim 21:9eb628d9e164 46 void TextLCD_Base::_init() {
wim 15:b70ebfffb258 47
wim 15:b70ebfffb258 48 // Select and configure second LCD controller when needed
wim 15:b70ebfffb258 49 if(_type==LCD40x4) {
wim 21:9eb628d9e164 50 _ctrl_idx=_LCDCtrl_1; // Select 2nd controller
wim 15:b70ebfffb258 51
wim 19:c747b9e2e7b8 52 _initCtrl(); // Init 2nd controller
wim 15:b70ebfffb258 53
wim 15:b70ebfffb258 54 // Secondary LCD controller Clearscreen
wim 15:b70ebfffb258 55 _writeCommand(0x01); // cls, and set cursor to 0
wim 15:b70ebfffb258 56 wait_ms(10); // The CLS command takes 1.64 ms.
wim 15:b70ebfffb258 57 // Since we are not using the Busy flag, Lets be safe and take 10 ms
wim 15:b70ebfffb258 58
wim 15:b70ebfffb258 59 }
wim 15:b70ebfffb258 60
wim 15:b70ebfffb258 61 // Select and configure primary LCD controller
wim 21:9eb628d9e164 62 _ctrl_idx=_LCDCtrl_0; // Select primary controller
wim 13:24506ba22480 63
wim 19:c747b9e2e7b8 64 _initCtrl(); // Init primary controller
wim 15:b70ebfffb258 65
wim 15:b70ebfffb258 66 // Primary LCD controller Clearscreen
wim 15:b70ebfffb258 67 _writeCommand(0x01); // cls, and set cursor to 0
wim 15:b70ebfffb258 68
wim 15:b70ebfffb258 69 wait_ms(10); // The CLS command takes 1.64 ms.
wim 15:b70ebfffb258 70 // Since we are not using the Busy flag, Lets be safe and take 10 ms
wim 15:b70ebfffb258 71
wim 15:b70ebfffb258 72 }
wim 15:b70ebfffb258 73
wim 21:9eb628d9e164 74 /** Init the LCD controller
wim 21:9eb628d9e164 75 * 4-bit mode, number of lines, fonttype, no cursor etc
wim 21:9eb628d9e164 76 *
wim 21:9eb628d9e164 77 */
wim 21:9eb628d9e164 78 void TextLCD_Base::_initCtrl() {
wim 15:b70ebfffb258 79
wim 21:9eb628d9e164 80 this->_setRS(false); // command mode
wim 13:24506ba22480 81
wim 15:b70ebfffb258 82 wait_ms(20); // Wait 20ms to ensure powered up
simon 1:ac48b187213c 83
wim 17:652ab113bc2e 84 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
wim 17:652ab113bc2e 85 for (int i=0; i<3; i++) {
wim 17:652ab113bc2e 86 _writeNibble(0x3);
wim 20:e0da005a777f 87 wait_ms(15); // This command takes 1.64ms, so wait for it
wim 17:652ab113bc2e 88 }
wim 17:652ab113bc2e 89 _writeNibble(0x2); // 4-bit mode
wim 17:652ab113bc2e 90 wait_us(40); // most instructions take 40us
wim 18:bd65dc10f27f 91
wim 18:bd65dc10f27f 92 // Display is now in 4-bit mode
wim 18:bd65dc10f27f 93
wim 19:c747b9e2e7b8 94
wim 19:c747b9e2e7b8 95 // Device specific initialisations for DC/DC converter to generate VLCD or VLED
wim 19:c747b9e2e7b8 96 switch (_ctrl) {
wim 20:e0da005a777f 97 case ST7036:
wim 19:c747b9e2e7b8 98 // ST7036 controller: Initialise Voltage booster for VLCD. VDD=5V
wim 19:c747b9e2e7b8 99 // Note: supports 1,2 or 3 lines
wim 19:c747b9e2e7b8 100 _writeByte( 0x29 ); // 4-bit Databus, 2 Lines, Select Instruction table 1
wim 20:e0da005a777f 101 wait_ms(30); // > 26,3ms
wim 19:c747b9e2e7b8 102 _writeByte( 0x14 ); // Bias: 1/5, 2-Lines LCD
wim 20:e0da005a777f 103 wait_ms(30); // > 26,3ms
wim 19:c747b9e2e7b8 104 _writeByte( 0x55 ); // Icon off, Booster on, Set Contrast C5, C4
wim 20:e0da005a777f 105 wait_ms(30); // > 26,3ms
wim 19:c747b9e2e7b8 106 _writeByte( 0x6d ); // Voltagefollower On, Ampl ratio Rab2, Rab1, Rab0
wim 19:c747b9e2e7b8 107 wait_ms(200); // > 200ms!
wim 19:c747b9e2e7b8 108 _writeByte( 0x78 ); // Set Contrast C3, C2, C1, C0
wim 20:e0da005a777f 109 wait_ms(30); // > 26,3ms
wim 19:c747b9e2e7b8 110 _writeByte( 0x28 ); // Return to Instruction table 0
wim 19:c747b9e2e7b8 111 wait_ms(50);
wim 19:c747b9e2e7b8 112
wim 19:c747b9e2e7b8 113 break;
Sissors 24:fb3399713710 114 case ST7032:
Sissors 24:fb3399713710 115 _writeByte( 0x1c ); //Internal OSC frequency adjustment 183HZ bias will be 1/4
Sissors 24:fb3399713710 116 wait_us(30);
Sissors 24:fb3399713710 117 _writeByte( 0x73 ); //Contrast control low byte
Sissors 24:fb3399713710 118 wait_us(30);
Sissors 24:fb3399713710 119 _writeByte( 0x57 ); //booster circuit is turn on. /ICON display off. /Contrast control high byte
Sissors 24:fb3399713710 120 wait_us(30);
Sissors 24:fb3399713710 121 _writeByte( 0x6c ); //Follower control
Sissors 24:fb3399713710 122 wait_us(50);
Sissors 24:fb3399713710 123 _writeByte( 0x0c ); //DISPLAY ON
Sissors 24:fb3399713710 124 wait_us(30);
Sissors 24:fb3399713710 125 break;
wim 19:c747b9e2e7b8 126 case WS0010:
wim 19:c747b9e2e7b8 127 // WS0010 OLED controller: Initialise DC/DC Voltage converter for LEDs
wim 19:c747b9e2e7b8 128 // Note: supports 1 or 2 lines (and 16x100 graphics)
wim 19:c747b9e2e7b8 129 // supports 4 fonts (English/Japanese (default), Western European-I, English/Russian, Western European-II)
wim 19:c747b9e2e7b8 130
wim 19:c747b9e2e7b8 131 // Cursor/Disp shift set 0001 SC RL 0 0
wim 19:c747b9e2e7b8 132 //
wim 19:c747b9e2e7b8 133 // Mode en Power set 0001 GC PWR 1 1
wim 19:c747b9e2e7b8 134 // GC = 0 (Graph Mode=1, Char Mode=0)
wim 19:c747b9e2e7b8 135 // PWR = (DC/DC On/Off)
wim 19:c747b9e2e7b8 136
wim 19:c747b9e2e7b8 137 //_writeCommand(0x13); // DC/DC off
wim 19:c747b9e2e7b8 138
wim 19:c747b9e2e7b8 139 _writeCommand(0x17); // DC/DC on
wim 19:c747b9e2e7b8 140 wait_ms(10);
wim 19:c747b9e2e7b8 141
wim 19:c747b9e2e7b8 142 break;
wim 19:c747b9e2e7b8 143
wim 19:c747b9e2e7b8 144 default:
wim 19:c747b9e2e7b8 145 // Devices that do not use DC/DC Voltage converters but external VLCD
wim 19:c747b9e2e7b8 146 break;
wim 19:c747b9e2e7b8 147 }
wim 14:0c32b66b14b8 148
wim 18:bd65dc10f27f 149 // Initialise Display configuration
wim 10:dd9b3a696acd 150 switch (_type) {
wim 10:dd9b3a696acd 151 case LCD8x1:
wim 18:bd65dc10f27f 152 case LCD8x2B:
wim 18:bd65dc10f27f 153 //8x1 is a regular 1 line display
wim 18:bd65dc10f27f 154 //8x2B is a special case of 16x1
wim 15:b70ebfffb258 155 _writeCommand(0x20); // Function set 001 DL N F - -
wim 15:b70ebfffb258 156 // DL=0 (4 bits bus)
wim 13:24506ba22480 157 // N=0 (1 line)
wim 13:24506ba22480 158 // F=0 (5x7 dots font)
wim 10:dd9b3a696acd 159 break;
wim 10:dd9b3a696acd 160
wim 10:dd9b3a696acd 161 case LCD24x4:
wim 10:dd9b3a696acd 162 // Special mode for KS0078
wim 15:b70ebfffb258 163 _writeCommand(0x2A); // Function set 001 DL N RE DH REV
wim 15:b70ebfffb258 164 // DL=0 (4 bits bus)
wim 13:24506ba22480 165 // N=1 (Dont care for KS0078)
wim 13:24506ba22480 166 // RE=0 (Extended Regs, special mode for KS0078)
wim 13:24506ba22480 167 // DH=1 (Disp shift, special mode for KS0078)
wim 13:24506ba22480 168 // REV=0 (Reverse, special mode for KS0078)
wim 10:dd9b3a696acd 169
wim 15:b70ebfffb258 170 _writeCommand(0x2E); // Function set 001 DL N RE DH REV
wim 15:b70ebfffb258 171 // DL=0 (4 bits bus)
wim 13:24506ba22480 172 // N=1 (Dont care for KS0078)
wim 13:24506ba22480 173 // RE=1 (Ena Extended Regs, special mode for KS0078)
wim 13:24506ba22480 174 // DH=1 (Disp shift, special mode for KS0078)
wim 13:24506ba22480 175 // REV=0 (Reverse, special mode for KS0078)
wim 10:dd9b3a696acd 176
wim 13:24506ba22480 177 _writeCommand(0x09); // Ext Function set 0000 1 FW BW NW
wim 13:24506ba22480 178 // FW=0 (5-dot font, special mode for KS0078)
wim 13:24506ba22480 179 // BW=0 (Cur BW invert disable, special mode for KS0078)
wim 13:24506ba22480 180 // NW=1 (4 Line, special mode for KS0078)
wim 10:dd9b3a696acd 181
wim 15:b70ebfffb258 182 _writeCommand(0x2A); // Function set 001 DL N RE DH REV
wim 15:b70ebfffb258 183 // DL=0 (4 bits bus)
wim 13:24506ba22480 184 // N=1 (Dont care for KS0078)
wim 13:24506ba22480 185 // RE=0 (Dis. Extended Regs, special mode for KS0078)
wim 13:24506ba22480 186 // DH=1 (Disp shift, special mode for KS0078)
wim 13:24506ba22480 187 // REV=0 (Reverse, special mode for KS0078)
wim 10:dd9b3a696acd 188 break;
wim 10:dd9b3a696acd 189
wim 15:b70ebfffb258 190 // All other LCD types are initialised as 2 Line displays (including LCD40x4)
wim 10:dd9b3a696acd 191 default:
wim 15:b70ebfffb258 192 _writeCommand(0x28); // Function set 001 DL N F - -
wim 15:b70ebfffb258 193 // DL=0 (4 bits bus)
wim 13:24506ba22480 194 // N=1 (2 lines)
wim 15:b70ebfffb258 195 // F=0 (5x7 dots font, only option for 2 line display)
wim 13:24506ba22480 196 // - (Don't care)
wim 10:dd9b3a696acd 197
wim 10:dd9b3a696acd 198 break;
wim 10:dd9b3a696acd 199 }
wim 10:dd9b3a696acd 200
wim 13:24506ba22480 201 _writeCommand(0x06); // Entry Mode 0000 01 CD S
wim 13:24506ba22480 202 // Cursor Direction and Display Shift
wim 13:24506ba22480 203 // CD=1 (Cur incr)
wim 13:24506ba22480 204 // S=0 (No display shift)
wim 10:dd9b3a696acd 205
wim 13:24506ba22480 206 // _writeCommand(0x0C); // Display Ctrl 0000 1 D C B
wim 17:652ab113bc2e 207 // // Display On, Cursor Off, Blink Off
wim 21:9eb628d9e164 208 setCursor(CurOff_BlkOff);
wim 21:9eb628d9e164 209 setMode(DispOn);
simon 1:ac48b187213c 210 }
simon 1:ac48b187213c 211
wim 8:03116f75b66e 212
wim 21:9eb628d9e164 213 /** Clear the screen, Cursor home.
wim 21:9eb628d9e164 214 */
wim 21:9eb628d9e164 215 void TextLCD_Base::cls() {
wim 15:b70ebfffb258 216
wim 15:b70ebfffb258 217 // Select and configure second LCD controller when needed
wim 15:b70ebfffb258 218 if(_type==LCD40x4) {
wim 21:9eb628d9e164 219 _ctrl_idx=_LCDCtrl_1; // Select 2nd controller
wim 15:b70ebfffb258 220
wim 15:b70ebfffb258 221 // Second LCD controller Cursor always Off
wim 21:9eb628d9e164 222 _setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
wim 15:b70ebfffb258 223
wim 15:b70ebfffb258 224 // Second LCD controller Clearscreen
wim 15:b70ebfffb258 225 _writeCommand(0x01); // cls, and set cursor to 0
wim 15:b70ebfffb258 226
wim 15:b70ebfffb258 227 wait_ms(10); // The CLS command takes 1.64 ms.
wim 15:b70ebfffb258 228 // Since we are not using the Busy flag, Lets be safe and take 10 ms
wim 15:b70ebfffb258 229
wim 15:b70ebfffb258 230
wim 21:9eb628d9e164 231 _ctrl_idx=_LCDCtrl_0; // Select primary controller
wim 15:b70ebfffb258 232 }
wim 15:b70ebfffb258 233
wim 15:b70ebfffb258 234 // Primary LCD controller Clearscreen
wim 15:b70ebfffb258 235 _writeCommand(0x01); // cls, and set cursor to 0
wim 15:b70ebfffb258 236
wim 15:b70ebfffb258 237 wait_ms(10); // The CLS command takes 1.64 ms.
wim 15:b70ebfffb258 238 // Since we are not using the Busy flag, Lets be safe and take 10 ms
wim 15:b70ebfffb258 239
wim 15:b70ebfffb258 240 // Restore cursormode on primary LCD controller when needed
wim 15:b70ebfffb258 241 if(_type==LCD40x4) {
wim 17:652ab113bc2e 242 _setCursorAndDisplayMode(_currentMode,_currentCursor);
wim 15:b70ebfffb258 243 }
wim 15:b70ebfffb258 244
wim 15:b70ebfffb258 245 _row=0; // Reset Cursor location
wim 15:b70ebfffb258 246 _column=0;
simon 1:ac48b187213c 247 }
simon 1:ac48b187213c 248
wim 21:9eb628d9e164 249 /** Move cursor to selected row and column
wim 21:9eb628d9e164 250 */
wim 21:9eb628d9e164 251 void TextLCD_Base::locate(int column, int row) {
wim 15:b70ebfffb258 252
wim 15:b70ebfffb258 253 // setAddress() does all the heavy lifting:
wim 15:b70ebfffb258 254 // check column and row sanity,
wim 15:b70ebfffb258 255 // switch controllers for LCD40x4 if needed
wim 15:b70ebfffb258 256 // switch cursor for LCD40x4 if needed
wim 15:b70ebfffb258 257 // set the new memory address to show cursor at correct location
wim 15:b70ebfffb258 258 setAddress(column, row);
wim 15:b70ebfffb258 259
wim 15:b70ebfffb258 260 }
wim 15:b70ebfffb258 261
wim 15:b70ebfffb258 262
wim 21:9eb628d9e164 263 /** Write a single character (Stream implementation)
wim 21:9eb628d9e164 264 */
wim 21:9eb628d9e164 265 int TextLCD_Base::_putc(int value) {
wim 15:b70ebfffb258 266 int addr;
wim 15:b70ebfffb258 267
wim 15:b70ebfffb258 268 if (value == '\n') {
wim 15:b70ebfffb258 269 //No character to write
wim 15:b70ebfffb258 270
wim 15:b70ebfffb258 271 //Update Cursor
wim 15:b70ebfffb258 272 _column = 0;
wim 15:b70ebfffb258 273 _row++;
wim 15:b70ebfffb258 274 if (_row >= rows()) {
wim 15:b70ebfffb258 275 _row = 0;
wim 15:b70ebfffb258 276 }
wim 15:b70ebfffb258 277 }
wim 15:b70ebfffb258 278 else {
wim 15:b70ebfffb258 279 //Character to write
wim 15:b70ebfffb258 280 _writeData(value);
wim 15:b70ebfffb258 281
wim 15:b70ebfffb258 282 //Update Cursor
wim 15:b70ebfffb258 283 _column++;
wim 15:b70ebfffb258 284 if (_column >= columns()) {
wim 15:b70ebfffb258 285 _column = 0;
wim 15:b70ebfffb258 286 _row++;
wim 15:b70ebfffb258 287 if (_row >= rows()) {
wim 15:b70ebfffb258 288 _row = 0;
wim 15:b70ebfffb258 289 }
wim 15:b70ebfffb258 290 }
wim 15:b70ebfffb258 291 } //else
wim 15:b70ebfffb258 292
wim 15:b70ebfffb258 293 //Set next memoryaddress, make sure cursor blinks at next location
wim 15:b70ebfffb258 294 addr = getAddress(_column, _row);
wim 15:b70ebfffb258 295 _writeCommand(0x80 | addr);
wim 15:b70ebfffb258 296
wim 15:b70ebfffb258 297 return value;
wim 15:b70ebfffb258 298 }
wim 15:b70ebfffb258 299
wim 15:b70ebfffb258 300
wim 16:c276b75e6585 301 // get a single character (Stream implementation)
wim 21:9eb628d9e164 302 int TextLCD_Base::_getc() {
simon 1:ac48b187213c 303 return -1;
simon 1:ac48b187213c 304 }
simon 1:ac48b187213c 305
wim 14:0c32b66b14b8 306
wim 17:652ab113bc2e 307 // Write a nibble using the 4-bit interface
wim 21:9eb628d9e164 308 void TextLCD_Base::_writeNibble(int value) {
wim 17:652ab113bc2e 309
wim 17:652ab113bc2e 310 // Enable is Low
wim 21:9eb628d9e164 311 this->_setEnable(true);
wim 21:9eb628d9e164 312 this->_setData(value & 0x0F); // Low nibble
wim 17:652ab113bc2e 313 wait_us(1); // Data setup time
wim 21:9eb628d9e164 314 this->_setEnable(false);
wim 17:652ab113bc2e 315 wait_us(1); // Datahold time
wim 17:652ab113bc2e 316
wim 17:652ab113bc2e 317 // Enable is Low
wim 17:652ab113bc2e 318
wim 17:652ab113bc2e 319 }
wim 17:652ab113bc2e 320
wim 17:652ab113bc2e 321
wim 16:c276b75e6585 322 // Write a byte using the 4-bit interface
wim 21:9eb628d9e164 323 void TextLCD_Base::_writeByte(int value) {
wim 15:b70ebfffb258 324
wim 15:b70ebfffb258 325 // Enable is Low
wim 21:9eb628d9e164 326 this->_setEnable(true);
wim 21:9eb628d9e164 327 this->_setData(value >> 4); // High nibble
wim 15:b70ebfffb258 328 wait_us(1); // Data setup time
wim 21:9eb628d9e164 329 this->_setEnable(false);
wim 15:b70ebfffb258 330 wait_us(1); // Data hold time
wim 15:b70ebfffb258 331
wim 21:9eb628d9e164 332 this->_setEnable(true);
wim 21:9eb628d9e164 333 this->_setData(value >> 0); // Low nibble
wim 15:b70ebfffb258 334 wait_us(1); // Data setup time
wim 21:9eb628d9e164 335 this->_setEnable(false);
wim 15:b70ebfffb258 336 wait_us(1); // Datahold time
wim 15:b70ebfffb258 337
wim 15:b70ebfffb258 338 // Enable is Low
wim 15:b70ebfffb258 339
simon 1:ac48b187213c 340 }
simon 1:ac48b187213c 341
wim 21:9eb628d9e164 342 // Write a command byte to the LCD controller
wim 21:9eb628d9e164 343 void TextLCD_Base::_writeCommand(int command) {
wim 15:b70ebfffb258 344
wim 21:9eb628d9e164 345 this->_setRS(false);
wim 16:c276b75e6585 346 wait_us(1); // Data setup time for RS
wim 15:b70ebfffb258 347
wim 21:9eb628d9e164 348 this->_writeByte(command);
wim 15:b70ebfffb258 349 wait_us(40); // most instructions take 40us
simon 1:ac48b187213c 350 }
simon 1:ac48b187213c 351
wim 21:9eb628d9e164 352 // Write a data byte to the LCD controller
wim 21:9eb628d9e164 353 void TextLCD_Base::_writeData(int data) {
wim 15:b70ebfffb258 354
wim 21:9eb628d9e164 355 this->_setRS(true);
wim 16:c276b75e6585 356 wait_us(1); // Data setup time for RS
wim 15:b70ebfffb258 357
wim 21:9eb628d9e164 358 this->_writeByte(data);
wim 15:b70ebfffb258 359 wait_us(40); // data writes take 40us
simon 1:ac48b187213c 360 }
simon 1:ac48b187213c 361
wim 8:03116f75b66e 362
wim 8:03116f75b66e 363 #if (0)
wim 16:c276b75e6585 364 // This is the original _address() method.
wim 8:03116f75b66e 365 // It is confusing since it returns the memoryaddress or-ed with the set memorycommand 0x80.
wim 8:03116f75b66e 366 // Left it in here for compatibility with older code. New applications should use getAddress() instead.
wim 8:03116f75b66e 367 //
wim 21:9eb628d9e164 368 int TextLCD_Base::_address(int column, int row) {
simon 1:ac48b187213c 369 switch (_type) {
simon 1:ac48b187213c 370 case LCD20x4:
simon 1:ac48b187213c 371 switch (row) {
simon 1:ac48b187213c 372 case 0:
simon 1:ac48b187213c 373 return 0x80 + column;
simon 1:ac48b187213c 374 case 1:
simon 1:ac48b187213c 375 return 0xc0 + column;
simon 1:ac48b187213c 376 case 2:
simon 1:ac48b187213c 377 return 0x94 + column;
simon 1:ac48b187213c 378 case 3:
simon 1:ac48b187213c 379 return 0xd4 + column;
simon 1:ac48b187213c 380 }
simon 1:ac48b187213c 381 case LCD16x2B:
simon 4:bf5b706f8d32 382 return 0x80 + (row * 40) + column;
simon 1:ac48b187213c 383 case LCD16x2:
simon 1:ac48b187213c 384 case LCD20x2:
simon 1:ac48b187213c 385 default:
simon 4:bf5b706f8d32 386 return 0x80 + (row * 0x40) + column;
simon 1:ac48b187213c 387 }
simon 1:ac48b187213c 388 }
wim 8:03116f75b66e 389 #endif
wim 8:03116f75b66e 390
wim 8:03116f75b66e 391
wim 16:c276b75e6585 392 // This replaces the original _address() method.
wim 8:03116f75b66e 393 // Left it in here for compatibility with older code. New applications should use getAddress() instead.
wim 21:9eb628d9e164 394 int TextLCD_Base::_address(int column, int row) {
wim 8:03116f75b66e 395 return 0x80 | getAddress(column, row);
wim 8:03116f75b66e 396 }
wim 8:03116f75b66e 397
wim 8:03116f75b66e 398 // This is new method to return the memory address based on row, column and displaytype.
wim 8:03116f75b66e 399 //
wim 21:9eb628d9e164 400 int TextLCD_Base::getAddress(int column, int row) {
wim 8:03116f75b66e 401
wim 8:03116f75b66e 402 switch (_type) {
wim 8:03116f75b66e 403 case LCD8x1:
wim 8:03116f75b66e 404 return 0x00 + column;
wim 18:bd65dc10f27f 405
wim 18:bd65dc10f27f 406 case LCD8x2B:
wim 18:bd65dc10f27f 407 // LCD8x2B is a special layout of LCD16x1
wim 18:bd65dc10f27f 408 if (row==0)
wim 18:bd65dc10f27f 409 return 0x00 + column;
wim 18:bd65dc10f27f 410 else
wim 18:bd65dc10f27f 411 return 0x08 + column;
wim 18:bd65dc10f27f 412
wim 18:bd65dc10f27f 413
wim 13:24506ba22480 414 case LCD16x1:
wim 13:24506ba22480 415 // LCD16x1 is a special layout of LCD8x2
wim 13:24506ba22480 416 if (column<8)
wim 13:24506ba22480 417 return 0x00 + column;
wim 13:24506ba22480 418 else
wim 13:24506ba22480 419 return 0x40 + (column - 8);
wim 13:24506ba22480 420
wim 15:b70ebfffb258 421 case LCD12x4:
wim 15:b70ebfffb258 422 switch (row) {
wim 15:b70ebfffb258 423 case 0:
wim 15:b70ebfffb258 424 return 0x00 + column;
wim 15:b70ebfffb258 425 case 1:
wim 15:b70ebfffb258 426 return 0x40 + column;
wim 15:b70ebfffb258 427 case 2:
wim 15:b70ebfffb258 428 return 0x0C + column;
wim 15:b70ebfffb258 429 case 3:
wim 15:b70ebfffb258 430 return 0x4C + column;
wim 15:b70ebfffb258 431 }
wim 15:b70ebfffb258 432
wim 8:03116f75b66e 433 case LCD16x4:
wim 8:03116f75b66e 434 switch (row) {
wim 8:03116f75b66e 435 case 0:
wim 8:03116f75b66e 436 return 0x00 + column;
wim 8:03116f75b66e 437 case 1:
wim 8:03116f75b66e 438 return 0x40 + column;
wim 8:03116f75b66e 439 case 2:
wim 8:03116f75b66e 440 return 0x10 + column;
wim 8:03116f75b66e 441 case 3:
wim 8:03116f75b66e 442 return 0x50 + column;
wim 8:03116f75b66e 443 }
wim 8:03116f75b66e 444
wim 8:03116f75b66e 445 case LCD20x4:
wim 8:03116f75b66e 446 switch (row) {
wim 8:03116f75b66e 447 case 0:
wim 8:03116f75b66e 448 return 0x00 + column;
wim 8:03116f75b66e 449 case 1:
wim 8:03116f75b66e 450 return 0x40 + column;
wim 8:03116f75b66e 451 case 2:
wim 8:03116f75b66e 452 return 0x14 + column;
wim 8:03116f75b66e 453 case 3:
wim 8:03116f75b66e 454 return 0x54 + column;
wim 8:03116f75b66e 455 }
wim 8:03116f75b66e 456
wim 10:dd9b3a696acd 457 // Special mode for KS0078
wim 10:dd9b3a696acd 458 case LCD24x4:
wim 10:dd9b3a696acd 459 switch (row) {
wim 10:dd9b3a696acd 460 case 0:
wim 10:dd9b3a696acd 461 return 0x00 + column;
wim 10:dd9b3a696acd 462 case 1:
wim 10:dd9b3a696acd 463 return 0x20 + column;
wim 10:dd9b3a696acd 464 case 2:
wim 10:dd9b3a696acd 465 return 0x40 + column;
wim 10:dd9b3a696acd 466 case 3:
wim 10:dd9b3a696acd 467 return 0x60 + column;
wim 10:dd9b3a696acd 468 }
wim 10:dd9b3a696acd 469
wim 8:03116f75b66e 470 // Not sure about this one, seems wrong.
wim 8:03116f75b66e 471 case LCD16x2B:
wim 8:03116f75b66e 472 return 0x00 + (row * 40) + column;
wim 8:03116f75b66e 473
wim 18:bd65dc10f27f 474 case LCD8x2:
wim 15:b70ebfffb258 475 case LCD12x2:
wim 8:03116f75b66e 476 case LCD16x2:
wim 8:03116f75b66e 477 case LCD20x2:
wim 8:03116f75b66e 478 case LCD24x2:
wim 9:0893d986e717 479 case LCD40x2:
wim 8:03116f75b66e 480 return 0x00 + (row * 0x40) + column;
wim 15:b70ebfffb258 481
wim 15:b70ebfffb258 482 case LCD40x4:
wim 15:b70ebfffb258 483 // LCD40x4 is a special case since it has 2 controllers
wim 15:b70ebfffb258 484 // Each controller is configured as 40x2
wim 15:b70ebfffb258 485 if (row<2) {
wim 15:b70ebfffb258 486 // Test to see if we need to switch between controllers
wim 19:c747b9e2e7b8 487 if (_ctrl_idx != _LCDCtrl_0) {
wim 17:652ab113bc2e 488
wim 15:b70ebfffb258 489 // Second LCD controller Cursor Off
wim 21:9eb628d9e164 490 _setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
wim 15:b70ebfffb258 491
wim 15:b70ebfffb258 492 // Select primary controller
wim 19:c747b9e2e7b8 493 _ctrl_idx = _LCDCtrl_0;
wim 15:b70ebfffb258 494
wim 15:b70ebfffb258 495 // Restore cursormode on primary LCD controller
wim 17:652ab113bc2e 496 _setCursorAndDisplayMode(_currentMode, _currentCursor);
wim 15:b70ebfffb258 497 }
wim 15:b70ebfffb258 498
wim 15:b70ebfffb258 499 return 0x00 + (row * 0x40) + column;
wim 15:b70ebfffb258 500 }
wim 15:b70ebfffb258 501 else {
wim 15:b70ebfffb258 502
wim 15:b70ebfffb258 503 // Test to see if we need to switch between controllers
wim 19:c747b9e2e7b8 504 if (_ctrl_idx != _LCDCtrl_1) {
wim 15:b70ebfffb258 505 // Primary LCD controller Cursor Off
wim 21:9eb628d9e164 506 _setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
wim 15:b70ebfffb258 507
wim 15:b70ebfffb258 508 // Select secondary controller
wim 19:c747b9e2e7b8 509 _ctrl_idx = _LCDCtrl_1;
wim 15:b70ebfffb258 510
wim 15:b70ebfffb258 511 // Restore cursormode on secondary LCD controller
wim 17:652ab113bc2e 512 _setCursorAndDisplayMode(_currentMode, _currentCursor);
wim 15:b70ebfffb258 513 }
wim 15:b70ebfffb258 514
wim 15:b70ebfffb258 515 return 0x00 + ((row-2) * 0x40) + column;
wim 15:b70ebfffb258 516 }
wim 8:03116f75b66e 517
wim 8:03116f75b66e 518 // Should never get here.
wim 8:03116f75b66e 519 default:
wim 8:03116f75b66e 520 return 0x00;
wim 8:03116f75b66e 521 }
wim 8:03116f75b66e 522 }
wim 8:03116f75b66e 523
wim 8:03116f75b66e 524
wim 15:b70ebfffb258 525 // Set row, column and update memoryaddress.
wim 8:03116f75b66e 526 //
wim 21:9eb628d9e164 527 void TextLCD_Base::setAddress(int column, int row) {
wim 15:b70ebfffb258 528
wim 15:b70ebfffb258 529 // Sanity Check column
wim 15:b70ebfffb258 530 if (column < 0) {
wim 15:b70ebfffb258 531 _column = 0;
wim 15:b70ebfffb258 532 }
wim 15:b70ebfffb258 533 else if (column >= columns()) {
wim 15:b70ebfffb258 534 _column = columns() - 1;
wim 15:b70ebfffb258 535 } else _column = column;
wim 8:03116f75b66e 536
wim 15:b70ebfffb258 537 // Sanity Check row
wim 15:b70ebfffb258 538 if (row < 0) {
wim 15:b70ebfffb258 539 _row = 0;
wim 15:b70ebfffb258 540 }
wim 15:b70ebfffb258 541 else if (row >= rows()) {
wim 15:b70ebfffb258 542 _row = rows() - 1;
wim 15:b70ebfffb258 543 } else _row = row;
wim 15:b70ebfffb258 544
wim 15:b70ebfffb258 545
wim 15:b70ebfffb258 546 // Compute the memory address
wim 15:b70ebfffb258 547 // For LCD40x4: switch controllers if needed
wim 15:b70ebfffb258 548 // switch cursor if needed
wim 15:b70ebfffb258 549 int addr = getAddress(_column, _row);
wim 8:03116f75b66e 550
wim 13:24506ba22480 551 _writeCommand(0x80 | addr);
wim 8:03116f75b66e 552 }
simon 1:ac48b187213c 553
wim 21:9eb628d9e164 554 int TextLCD_Base::columns() {
simon 1:ac48b187213c 555 switch (_type) {
wim 8:03116f75b66e 556 case LCD8x1:
wim 8:03116f75b66e 557 case LCD8x2:
wim 18:bd65dc10f27f 558 case LCD8x2B:
wim 8:03116f75b66e 559 return 8;
wim 15:b70ebfffb258 560
wim 15:b70ebfffb258 561 case LCD12x2:
wim 15:b70ebfffb258 562 case LCD12x4:
wim 15:b70ebfffb258 563 return 12;
wim 8:03116f75b66e 564
wim 13:24506ba22480 565 case LCD16x1:
simon 1:ac48b187213c 566 case LCD16x2:
simon 1:ac48b187213c 567 case LCD16x2B:
wim 8:03116f75b66e 568 case LCD16x4:
wim 8:03116f75b66e 569 return 16;
wim 8:03116f75b66e 570
wim 8:03116f75b66e 571 case LCD20x2:
wim 8:03116f75b66e 572 case LCD20x4:
wim 8:03116f75b66e 573 return 20;
wim 8:03116f75b66e 574
wim 8:03116f75b66e 575 case LCD24x2:
wim 10:dd9b3a696acd 576 case LCD24x4:
wim 8:03116f75b66e 577 return 24;
wim 9:0893d986e717 578
wim 9:0893d986e717 579 case LCD40x2:
wim 15:b70ebfffb258 580 case LCD40x4:
wim 9:0893d986e717 581 return 40;
wim 8:03116f75b66e 582
wim 8:03116f75b66e 583 // Should never get here.
simon 1:ac48b187213c 584 default:
wim 8:03116f75b66e 585 return 0;
simon 1:ac48b187213c 586 }
simon 1:ac48b187213c 587 }
simon 1:ac48b187213c 588
wim 21:9eb628d9e164 589 int TextLCD_Base::rows() {
simon 1:ac48b187213c 590 switch (_type) {
wim 8:03116f75b66e 591 case LCD8x1:
wim 13:24506ba22480 592 case LCD16x1:
wim 8:03116f75b66e 593 return 1;
wim 8:03116f75b66e 594
wim 15:b70ebfffb258 595 case LCD8x2:
wim 18:bd65dc10f27f 596 case LCD8x2B:
wim 15:b70ebfffb258 597 case LCD12x2:
simon 1:ac48b187213c 598 case LCD16x2:
simon 1:ac48b187213c 599 case LCD16x2B:
simon 1:ac48b187213c 600 case LCD20x2:
wim 8:03116f75b66e 601 case LCD24x2:
wim 9:0893d986e717 602 case LCD40x2:
wim 8:03116f75b66e 603 return 2;
wim 8:03116f75b66e 604
wim 15:b70ebfffb258 605 case LCD12x4:
wim 8:03116f75b66e 606 case LCD16x4:
wim 8:03116f75b66e 607 case LCD20x4:
wim 10:dd9b3a696acd 608 case LCD24x4:
wim 15:b70ebfffb258 609 case LCD40x4:
wim 8:03116f75b66e 610 return 4;
wim 12:6bf9d9957d31 611
wim 12:6bf9d9957d31 612 // Should never get here.
simon 1:ac48b187213c 613 default:
wim 8:03116f75b66e 614 return 0;
simon 1:ac48b187213c 615 }
simon 1:ac48b187213c 616 }
wim 10:dd9b3a696acd 617
wim 10:dd9b3a696acd 618
wim 17:652ab113bc2e 619 // Set the Cursor Mode (Cursor Off & Blink Off, Cursor On & Blink Off, Cursor Off & Blink On, Cursor On & Blink On
wim 21:9eb628d9e164 620 void TextLCD_Base::setCursor(LCDCursor cursorMode) {
wim 15:b70ebfffb258 621
wim 17:652ab113bc2e 622 // Save new cursor mode, needed when 2 controllers are in use or when display is switched off/on
wim 17:652ab113bc2e 623 _currentCursor = cursorMode;
wim 10:dd9b3a696acd 624
wim 17:652ab113bc2e 625 // Configure only current LCD controller
wim 17:652ab113bc2e 626 _setCursorAndDisplayMode(_currentMode, _currentCursor);
wim 15:b70ebfffb258 627
wim 15:b70ebfffb258 628 }
wim 15:b70ebfffb258 629
wim 17:652ab113bc2e 630 // Set the Displaymode (On/Off)
wim 21:9eb628d9e164 631 void TextLCD_Base::setMode(LCDMode displayMode) {
wim 17:652ab113bc2e 632
wim 17:652ab113bc2e 633 // Save new displayMode, needed when 2 controllers are in use or when cursor is changed
wim 17:652ab113bc2e 634 _currentMode = displayMode;
wim 15:b70ebfffb258 635
wim 17:652ab113bc2e 636 // Select and configure second LCD controller when needed
wim 17:652ab113bc2e 637 if(_type==LCD40x4) {
wim 21:9eb628d9e164 638 if (_ctrl_idx==_LCDCtrl_0) {
wim 17:652ab113bc2e 639 // Configure primary LCD controller
wim 17:652ab113bc2e 640 _setCursorAndDisplayMode(_currentMode, _currentCursor);
wim 11:9ec02df863a1 641
wim 17:652ab113bc2e 642 // Select 2nd controller
wim 21:9eb628d9e164 643 _ctrl_idx=_LCDCtrl_1;
wim 17:652ab113bc2e 644
wim 17:652ab113bc2e 645 // Configure secondary LCD controller
wim 21:9eb628d9e164 646 _setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
wim 11:9ec02df863a1 647
wim 17:652ab113bc2e 648 // Restore current controller
wim 21:9eb628d9e164 649 _ctrl_idx=_LCDCtrl_0;
wim 17:652ab113bc2e 650 }
wim 17:652ab113bc2e 651 else {
wim 17:652ab113bc2e 652 // Select primary controller
wim 21:9eb628d9e164 653 _ctrl_idx=_LCDCtrl_0;
wim 17:652ab113bc2e 654
wim 17:652ab113bc2e 655 // Configure primary LCD controller
wim 21:9eb628d9e164 656 _setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
wim 17:652ab113bc2e 657
wim 17:652ab113bc2e 658 // Restore current controller
wim 21:9eb628d9e164 659 _ctrl_idx=_LCDCtrl_1;
wim 11:9ec02df863a1 660
wim 17:652ab113bc2e 661 // Configure secondary LCD controller
wim 17:652ab113bc2e 662 _setCursorAndDisplayMode(_currentMode, _currentCursor);
wim 11:9ec02df863a1 663
wim 10:dd9b3a696acd 664 }
wim 17:652ab113bc2e 665 }
wim 17:652ab113bc2e 666 else {
wim 17:652ab113bc2e 667 // Configure primary LCD controller
wim 17:652ab113bc2e 668 _setCursorAndDisplayMode(_currentMode, _currentCursor);
wim 17:652ab113bc2e 669 }
wim 17:652ab113bc2e 670
wim 17:652ab113bc2e 671 }
wim 17:652ab113bc2e 672
wim 17:652ab113bc2e 673
wim 17:652ab113bc2e 674 // Set the Displaymode (On/Off) and Cursortype for current controller
wim 21:9eb628d9e164 675 void TextLCD_Base::_setCursorAndDisplayMode(LCDMode displayMode, LCDCursor cursorType) {
wim 17:652ab113bc2e 676
wim 17:652ab113bc2e 677 // Configure current LCD controller
wim 17:652ab113bc2e 678 _writeCommand(0x08 | displayMode | cursorType);
wim 10:dd9b3a696acd 679 }
wim 10:dd9b3a696acd 680
wim 20:e0da005a777f 681 // Set the Backlight mode (Off/On)
wim 21:9eb628d9e164 682 void TextLCD_Base::setBacklight(LCDBacklight backlightMode) {
wim 20:e0da005a777f 683
wim 20:e0da005a777f 684 if (backlightMode == LightOn) {
wim 21:9eb628d9e164 685 this->_setBL(true);
wim 20:e0da005a777f 686 }
wim 20:e0da005a777f 687 else {
wim 21:9eb628d9e164 688 this->_setBL(false);
wim 20:e0da005a777f 689 }
wim 20:e0da005a777f 690 }
wim 20:e0da005a777f 691
wim 10:dd9b3a696acd 692
wim 21:9eb628d9e164 693 void TextLCD_Base::setUDC(unsigned char c, char *udc_data) {
wim 15:b70ebfffb258 694
wim 15:b70ebfffb258 695 // Select and configure second LCD controller when needed
wim 15:b70ebfffb258 696 if(_type==LCD40x4) {
wim 19:c747b9e2e7b8 697 _LCDCtrl_Idx current_ctrl_idx = _ctrl_idx; // Temp save current controller
wim 15:b70ebfffb258 698
wim 15:b70ebfffb258 699 // Select primary controller
wim 21:9eb628d9e164 700 _ctrl_idx=_LCDCtrl_0;
wim 15:b70ebfffb258 701
wim 15:b70ebfffb258 702 // Configure primary LCD controller
wim 15:b70ebfffb258 703 _setUDC(c, udc_data);
wim 15:b70ebfffb258 704
wim 15:b70ebfffb258 705 // Select 2nd controller
wim 21:9eb628d9e164 706 _ctrl_idx=_LCDCtrl_1;
wim 15:b70ebfffb258 707
wim 15:b70ebfffb258 708 // Configure secondary LCD controller
wim 15:b70ebfffb258 709 _setUDC(c, udc_data);
wim 11:9ec02df863a1 710
wim 15:b70ebfffb258 711 // Restore current controller
wim 19:c747b9e2e7b8 712 _ctrl_idx=current_ctrl_idx;
wim 15:b70ebfffb258 713 }
wim 15:b70ebfffb258 714 else {
wim 15:b70ebfffb258 715 // Configure primary LCD controller
wim 15:b70ebfffb258 716 _setUDC(c, udc_data);
wim 15:b70ebfffb258 717 }
wim 15:b70ebfffb258 718
wim 15:b70ebfffb258 719 }
wim 15:b70ebfffb258 720
wim 21:9eb628d9e164 721 void TextLCD_Base::_setUDC(unsigned char c, char *udc_data) {
wim 15:b70ebfffb258 722
wim 15:b70ebfffb258 723 // Select CG RAM for current LCD controller
wim 15:b70ebfffb258 724 _writeCommand(0x40 + ((c & 0x07) << 3)); //Set CG-RAM address,
wim 15:b70ebfffb258 725 //8 sequential locations needed per UDC
wim 15:b70ebfffb258 726 // Store UDC pattern
wim 11:9ec02df863a1 727 for (int i=0; i<8; i++) {
wim 13:24506ba22480 728 _writeData(*udc_data++);
wim 11:9ec02df863a1 729 }
wim 15:b70ebfffb258 730
wim 15:b70ebfffb258 731 //Select DD RAM again for current LCD controller
wim 15:b70ebfffb258 732 int addr = getAddress(_column, _row);
wim 15:b70ebfffb258 733 _writeCommand(0x80 | addr);
wim 15:b70ebfffb258 734
wim 11:9ec02df863a1 735 }
wim 21:9eb628d9e164 736
wim 23:d47f226efb24 737 //--------- End TextLCD_Base -----------
wim 21:9eb628d9e164 738
wim 22:35742ec80c24 739
wim 21:9eb628d9e164 740
wim 23:d47f226efb24 741 //--------- Start TextLCD Bus -----------
wim 21:9eb628d9e164 742
wim 21:9eb628d9e164 743 /* Create a TextLCD interface for using regular mbed pins
wim 21:9eb628d9e164 744 *
wim 21:9eb628d9e164 745 * @param rs Instruction/data control line
wim 21:9eb628d9e164 746 * @param e Enable line (clock)
wim 21:9eb628d9e164 747 * @param d4-d7 Data lines for using as a 4-bit interface
wim 21:9eb628d9e164 748 * @param type Sets the panel size/addressing mode (default = LCD16x2)
wim 21:9eb628d9e164 749 * @param bl Backlight control line (optional, default = NC)
wim 21:9eb628d9e164 750 * @param e2 Enable2 line (clock for second controller, LCD40x4 only)
wim 21:9eb628d9e164 751 * @param ctrl LCD controller (default = HD44780)
wim 21:9eb628d9e164 752 */
wim 21:9eb628d9e164 753 TextLCD::TextLCD(PinName rs, PinName e,
wim 21:9eb628d9e164 754 PinName d4, PinName d5, PinName d6, PinName d7,
wim 21:9eb628d9e164 755 LCDType type, PinName bl, PinName e2, LCDCtrl ctrl) :
wim 21:9eb628d9e164 756 TextLCD_Base(type, ctrl),
wim 22:35742ec80c24 757 _rs(rs), _e(e), _d(d4, d5, d6, d7) {
wim 22:35742ec80c24 758
wim 22:35742ec80c24 759 // The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
wim 22:35742ec80c24 760 if (bl != NC) {
wim 22:35742ec80c24 761 _bl = new DigitalOut(bl); //Construct new pin
wim 22:35742ec80c24 762 _bl->write(0); //Deactivate
wim 22:35742ec80c24 763 }
wim 22:35742ec80c24 764 else {
wim 22:35742ec80c24 765 // No Hardware Backlight pin
wim 22:35742ec80c24 766 _bl = NULL; //Construct dummy pin
wim 22:35742ec80c24 767 }
wim 22:35742ec80c24 768
wim 22:35742ec80c24 769 // The hardware Enable2 pin is only needed for LCD40x4. Test and make sure whether it exists or not to prevent illegal access.
wim 22:35742ec80c24 770 if (e2 != NC) {
wim 22:35742ec80c24 771 _e2 = new DigitalOut(e2); //Construct new pin
wim 22:35742ec80c24 772 _e2->write(0); //Deactivate
wim 22:35742ec80c24 773 }
wim 22:35742ec80c24 774 else {
wim 22:35742ec80c24 775 // No Hardware Enable pin
wim 22:35742ec80c24 776 _e2 = NULL; //Construct dummy pin
wim 22:35742ec80c24 777 }
wim 21:9eb628d9e164 778
wim 21:9eb628d9e164 779 _init();
wim 21:9eb628d9e164 780
wim 21:9eb628d9e164 781 }
wim 21:9eb628d9e164 782
wim 22:35742ec80c24 783 /** Set E pin (or E2 pin)
wim 22:35742ec80c24 784 * Used for mbed pins, I2C bus expander or SPI shiftregister
wim 22:35742ec80c24 785 * Default PinName value for E2 is NC, must be used as pointer to avoid issues with mbed lib and DigitalOut pins
wim 22:35742ec80c24 786 * @param value true or false
wim 22:35742ec80c24 787 * @return none
wim 22:35742ec80c24 788 */
wim 21:9eb628d9e164 789 void TextLCD::_setEnable(bool value) {
wim 21:9eb628d9e164 790
wim 22:35742ec80c24 791 if(_ctrl_idx==_LCDCtrl_0) {
wim 22:35742ec80c24 792 if (value) {
wim 22:35742ec80c24 793 _e = 1; // Set E bit
wim 22:35742ec80c24 794 }
wim 22:35742ec80c24 795 else {
wim 22:35742ec80c24 796 _e = 0; // Reset E bit
wim 22:35742ec80c24 797 }
wim 22:35742ec80c24 798 }
wim 22:35742ec80c24 799 else {
wim 22:35742ec80c24 800 if (value) {
wim 22:35742ec80c24 801 if (_e2 != NULL) {_e2->write(1);} //Set E2 bit
wim 22:35742ec80c24 802 }
wim 22:35742ec80c24 803 else {
wim 22:35742ec80c24 804 if (_e2 != NULL) {_e2->write(0);} //Reset E2 bit
wim 22:35742ec80c24 805 }
wim 22:35742ec80c24 806 }
wim 21:9eb628d9e164 807
wim 21:9eb628d9e164 808 }
wim 21:9eb628d9e164 809
wim 21:9eb628d9e164 810 // Set RS pin
wim 21:9eb628d9e164 811 // Used for mbed pins, I2C bus expander or SPI shiftregister
wim 21:9eb628d9e164 812 void TextLCD::_setRS(bool value) {
wim 21:9eb628d9e164 813
wim 22:35742ec80c24 814 if (value) {
wim 21:9eb628d9e164 815 _rs = 1; // Set RS bit
wim 22:35742ec80c24 816 }
wim 22:35742ec80c24 817 else {
wim 21:9eb628d9e164 818 _rs = 0; // Reset RS bit
wim 22:35742ec80c24 819 }
wim 21:9eb628d9e164 820
wim 21:9eb628d9e164 821 }
wim 21:9eb628d9e164 822
wim 22:35742ec80c24 823 /** Set BL pin
wim 22:35742ec80c24 824 * Used for mbed pins, I2C bus expander or SPI shiftregister
wim 22:35742ec80c24 825 * Default PinName value is NC, must be used as pointer to avoid issues with mbed lib and DigitalOut pins
wim 22:35742ec80c24 826 * @param value true or false
wim 22:35742ec80c24 827 * @return none
wim 22:35742ec80c24 828 */
wim 21:9eb628d9e164 829 void TextLCD::_setBL(bool value) {
wim 21:9eb628d9e164 830
wim 22:35742ec80c24 831 if (value) {
wim 22:35742ec80c24 832 if (_bl != NULL) {_bl->write(1);} //Set BL bit
wim 22:35742ec80c24 833 }
wim 22:35742ec80c24 834 else {
wim 22:35742ec80c24 835 if (_bl != NULL) {_bl->write(0);} //Reset BL bit
wim 22:35742ec80c24 836 }
wim 21:9eb628d9e164 837
wim 21:9eb628d9e164 838 }
wim 21:9eb628d9e164 839
wim 21:9eb628d9e164 840 // Place the 4bit data on the databus
wim 21:9eb628d9e164 841 // Used for mbed pins, I2C bus expander or SPI shifregister
wim 21:9eb628d9e164 842 void TextLCD::_setData(int value) {
wim 21:9eb628d9e164 843 _d = value & 0x0F; // Write Databits
wim 21:9eb628d9e164 844 }
wim 21:9eb628d9e164 845
wim 22:35742ec80c24 846 /** Destruct a TextLCD interface for using regular mbed pins
wim 22:35742ec80c24 847 *
wim 22:35742ec80c24 848 * @param none
wim 22:35742ec80c24 849 * @return none
wim 22:35742ec80c24 850 */
wim 22:35742ec80c24 851 TextLCD::~TextLCD() {
wim 22:35742ec80c24 852 if (_bl != NULL) {delete _bl;} // BL pin
wim 22:35742ec80c24 853 if (_e2 != NULL) {delete _e2;} // E2 pin
wim 22:35742ec80c24 854 }
wim 21:9eb628d9e164 855
wim 22:35742ec80c24 856
wim 23:d47f226efb24 857 //----------- End TextLCD ---------------
wim 21:9eb628d9e164 858
wim 21:9eb628d9e164 859
wim 23:d47f226efb24 860 //--------- Start TextLCD_I2C -----------
wim 22:35742ec80c24 861
wim 22:35742ec80c24 862 /** Create a TextLCD interface using an I2C PC8574 or PCF8574A portexpander
wim 22:35742ec80c24 863 *
wim 22:35742ec80c24 864 * @param i2c I2C Bus
wim 22:35742ec80c24 865 * @param deviceAddress I2C slave address (PCF8574 or PCF8574A, default = 0x40)
wim 22:35742ec80c24 866 * @param type Sets the panel size/addressing mode (default = LCD16x2)
wim 22:35742ec80c24 867 * @param ctrl LCD controller (default = HD44780)
wim 22:35742ec80c24 868 */
wim 21:9eb628d9e164 869 TextLCD_I2C::TextLCD_I2C(I2C *i2c, char deviceAddress, LCDType type, LCDCtrl ctrl) :
wim 21:9eb628d9e164 870 TextLCD_Base(type, ctrl),
wim 21:9eb628d9e164 871 _i2c(i2c){
wim 21:9eb628d9e164 872
wim 22:35742ec80c24 873 _slaveAddress = deviceAddress & 0xFE;
wim 21:9eb628d9e164 874
wim 21:9eb628d9e164 875 // Init the portexpander bus
wim 21:9eb628d9e164 876 _lcd_bus = D_LCD_BUS_DEF;
wim 21:9eb628d9e164 877
wim 21:9eb628d9e164 878 // write the new data to the portexpander
wim 21:9eb628d9e164 879 _i2c->write(_slaveAddress, &_lcd_bus, 1);
wim 21:9eb628d9e164 880
wim 21:9eb628d9e164 881 _init();
wim 21:9eb628d9e164 882
wim 21:9eb628d9e164 883 }
wim 21:9eb628d9e164 884
wim 21:9eb628d9e164 885 // Set E pin (or E2 pin)
wim 21:9eb628d9e164 886 // Used for mbed pins, I2C bus expander or SPI shiftregister
wim 21:9eb628d9e164 887 void TextLCD_I2C::_setEnable(bool value) {
wim 21:9eb628d9e164 888
wim 22:35742ec80c24 889 if(_ctrl_idx==_LCDCtrl_0) {
wim 22:35742ec80c24 890 if (value)
wim 22:35742ec80c24 891 _lcd_bus |= D_LCD_E; // Set E bit
wim 22:35742ec80c24 892 else
wim 22:35742ec80c24 893 _lcd_bus &= ~D_LCD_E; // Reset E bit
wim 22:35742ec80c24 894 }
wim 22:35742ec80c24 895 else {
wim 22:35742ec80c24 896 if (value)
wim 22:35742ec80c24 897 _lcd_bus |= D_LCD_E2; // Set E2 bit
wim 22:35742ec80c24 898 else
wim 22:35742ec80c24 899 _lcd_bus &= ~D_LCD_E2; // Reset E2bit
wim 22:35742ec80c24 900 }
wim 21:9eb628d9e164 901
wim 22:35742ec80c24 902 // write the new data to the I2C portexpander
wim 22:35742ec80c24 903 _i2c->write(_slaveAddress, &_lcd_bus, 1);
wim 21:9eb628d9e164 904
wim 21:9eb628d9e164 905 }
wim 21:9eb628d9e164 906
wim 21:9eb628d9e164 907 // Set RS pin
wim 21:9eb628d9e164 908 // Used for mbed pins, I2C bus expander or SPI shiftregister
wim 21:9eb628d9e164 909 void TextLCD_I2C::_setRS(bool value) {
wim 21:9eb628d9e164 910
wim 22:35742ec80c24 911 if (value)
wim 22:35742ec80c24 912 _lcd_bus |= D_LCD_RS; // Set RS bit
wim 22:35742ec80c24 913 else
wim 22:35742ec80c24 914 _lcd_bus &= ~D_LCD_RS; // Reset RS bit
wim 21:9eb628d9e164 915
wim 22:35742ec80c24 916 // write the new data to the I2C portexpander
wim 22:35742ec80c24 917 _i2c->write(_slaveAddress, &_lcd_bus, 1);
wim 21:9eb628d9e164 918
wim 21:9eb628d9e164 919 }
wim 21:9eb628d9e164 920
wim 21:9eb628d9e164 921 // Set BL pin
wim 21:9eb628d9e164 922 // Used for mbed pins, I2C bus expander or SPI shiftregister
wim 21:9eb628d9e164 923 void TextLCD_I2C::_setBL(bool value) {
wim 21:9eb628d9e164 924
wim 21:9eb628d9e164 925 if (value)
wim 21:9eb628d9e164 926 _lcd_bus |= D_LCD_BL; // Set BL bit
wim 21:9eb628d9e164 927 else
wim 21:9eb628d9e164 928 _lcd_bus &= ~D_LCD_BL; // Reset BL bit
wim 21:9eb628d9e164 929
wim 21:9eb628d9e164 930 // write the new data to the I2C portexpander
wim 21:9eb628d9e164 931 _i2c->write(_slaveAddress, &_lcd_bus, 1);
wim 21:9eb628d9e164 932
wim 21:9eb628d9e164 933 }
wim 21:9eb628d9e164 934
wim 21:9eb628d9e164 935
wim 21:9eb628d9e164 936
wim 21:9eb628d9e164 937 // Place the 4bit data on the databus
wim 21:9eb628d9e164 938 // Used for mbed pins, I2C bus expander or SPI shifregister
wim 21:9eb628d9e164 939 void TextLCD_I2C::_setData(int value) {
wim 21:9eb628d9e164 940 int data;
wim 22:35742ec80c24 941
wim 22:35742ec80c24 942 // Set bit by bit to support any mapping of expander portpins to LCD pins
wim 21:9eb628d9e164 943
wim 22:35742ec80c24 944 data = value & 0x0F;
wim 22:35742ec80c24 945 if (data & 0x01)
wim 22:35742ec80c24 946 _lcd_bus |= D_LCD_D4; // Set Databit
wim 22:35742ec80c24 947 else
wim 22:35742ec80c24 948 _lcd_bus &= ~D_LCD_D4; // Reset Databit
wim 21:9eb628d9e164 949
wim 22:35742ec80c24 950 if (data & 0x02)
wim 22:35742ec80c24 951 _lcd_bus |= D_LCD_D5; // Set Databit
wim 22:35742ec80c24 952 else
wim 22:35742ec80c24 953 _lcd_bus &= ~D_LCD_D5; // Reset Databit
wim 21:9eb628d9e164 954
wim 22:35742ec80c24 955 if (data & 0x04)
wim 22:35742ec80c24 956 _lcd_bus |= D_LCD_D6; // Set Databit
wim 22:35742ec80c24 957 else
wim 22:35742ec80c24 958 _lcd_bus &= ~D_LCD_D6; // Reset Databit
wim 21:9eb628d9e164 959
wim 22:35742ec80c24 960 if (data & 0x08)
wim 22:35742ec80c24 961 _lcd_bus |= D_LCD_D7; // Set Databit
wim 22:35742ec80c24 962 else
wim 22:35742ec80c24 963 _lcd_bus &= ~D_LCD_D7; // Reset Databit
wim 21:9eb628d9e164 964
wim 22:35742ec80c24 965 // write the new data to the I2C portexpander
wim 22:35742ec80c24 966 _i2c->write(_slaveAddress, &_lcd_bus, 1);
wim 22:35742ec80c24 967
wim 22:35742ec80c24 968 }
wim 21:9eb628d9e164 969
wim 23:d47f226efb24 970 //---------- End TextLCD_I2C ------------
wim 21:9eb628d9e164 971
wim 21:9eb628d9e164 972
wim 21:9eb628d9e164 973
wim 23:d47f226efb24 974 //--------- Start TextLCD_SPI -----------
wim 21:9eb628d9e164 975
wim 22:35742ec80c24 976 /** Create a TextLCD interface using an SPI 74595 portexpander
wim 22:35742ec80c24 977 *
wim 22:35742ec80c24 978 * @param spi SPI Bus
wim 22:35742ec80c24 979 * @param cs chip select pin (active low)
wim 22:35742ec80c24 980 * @param type Sets the panel size/addressing mode (default = LCD16x2)
wim 22:35742ec80c24 981 * @param ctrl LCD controller (default = HD44780)
wim 22:35742ec80c24 982 */
wim 21:9eb628d9e164 983 TextLCD_SPI::TextLCD_SPI(SPI *spi, PinName cs, LCDType type, LCDCtrl ctrl) :
wim 21:9eb628d9e164 984 TextLCD_Base(type, ctrl),
wim 21:9eb628d9e164 985 _spi(spi),
wim 21:9eb628d9e164 986 _cs(cs) {
wim 21:9eb628d9e164 987
wim 21:9eb628d9e164 988 // Setup the spi for 8 bit data, low steady state clock,
wim 21:9eb628d9e164 989 // rising edge capture, with a 500KHz or 1MHz clock rate
wim 21:9eb628d9e164 990 _spi->format(8,0);
wim 21:9eb628d9e164 991 _spi->frequency(500000);
wim 21:9eb628d9e164 992 //_spi.frequency(1000000);
wim 21:9eb628d9e164 993
wim 21:9eb628d9e164 994
wim 21:9eb628d9e164 995 // Init the portexpander bus
wim 21:9eb628d9e164 996 _lcd_bus = D_LCD_BUS_DEF;
wim 21:9eb628d9e164 997
wim 21:9eb628d9e164 998 // write the new data to the portexpander
wim 21:9eb628d9e164 999 _setCS(false);
wim 21:9eb628d9e164 1000 _spi->write(_lcd_bus);
wim 21:9eb628d9e164 1001 _setCS(true);
wim 21:9eb628d9e164 1002
wim 21:9eb628d9e164 1003 _init();
wim 21:9eb628d9e164 1004
wim 21:9eb628d9e164 1005 }
wim 21:9eb628d9e164 1006
wim 21:9eb628d9e164 1007 // Set E pin (or E2 pin)
wim 21:9eb628d9e164 1008 // Used for mbed pins, I2C bus expander or SPI shiftregister
wim 21:9eb628d9e164 1009 void TextLCD_SPI::_setEnable(bool value) {
wim 21:9eb628d9e164 1010
wim 22:35742ec80c24 1011 if(_ctrl_idx==_LCDCtrl_0) {
wim 22:35742ec80c24 1012 if (value)
wim 22:35742ec80c24 1013 _lcd_bus |= D_LCD_E; // Set E bit
wim 22:35742ec80c24 1014 else
wim 22:35742ec80c24 1015 _lcd_bus &= ~D_LCD_E; // Reset E bit
wim 22:35742ec80c24 1016 }
wim 22:35742ec80c24 1017 else {
wim 22:35742ec80c24 1018 if (value)
wim 22:35742ec80c24 1019 _lcd_bus |= D_LCD_E2; // Set E2 bit
wim 22:35742ec80c24 1020 else
wim 22:35742ec80c24 1021 _lcd_bus &= ~D_LCD_E2; // Reset E2 bit
wim 22:35742ec80c24 1022 }
wim 21:9eb628d9e164 1023
wim 22:35742ec80c24 1024 // write the new data to the SPI portexpander
wim 22:35742ec80c24 1025 _setCS(false);
wim 22:35742ec80c24 1026 _spi->write(_lcd_bus);
wim 22:35742ec80c24 1027 _setCS(true);
wim 21:9eb628d9e164 1028
wim 21:9eb628d9e164 1029 }
wim 21:9eb628d9e164 1030
wim 21:9eb628d9e164 1031 // Set RS pin
wim 21:9eb628d9e164 1032 // Used for mbed pins, I2C bus expander or SPI shiftregister
wim 21:9eb628d9e164 1033 void TextLCD_SPI::_setRS(bool value) {
wim 21:9eb628d9e164 1034
wim 22:35742ec80c24 1035 if (value) {
wim 21:9eb628d9e164 1036 _lcd_bus |= D_LCD_RS; // Set RS bit
wim 22:35742ec80c24 1037 }
wim 22:35742ec80c24 1038 else {
wim 21:9eb628d9e164 1039 _lcd_bus &= ~D_LCD_RS; // Reset RS bit
wim 22:35742ec80c24 1040 }
wim 21:9eb628d9e164 1041
wim 21:9eb628d9e164 1042 // write the new data to the SPI portexpander
wim 21:9eb628d9e164 1043 _setCS(false);
wim 21:9eb628d9e164 1044 _spi->write(_lcd_bus);
wim 21:9eb628d9e164 1045 _setCS(true);
wim 21:9eb628d9e164 1046
wim 21:9eb628d9e164 1047 }
wim 21:9eb628d9e164 1048
wim 21:9eb628d9e164 1049 // Set BL pin
wim 21:9eb628d9e164 1050 // Used for mbed pins, I2C bus expander or SPI shiftregister
wim 21:9eb628d9e164 1051 void TextLCD_SPI::_setBL(bool value) {
wim 21:9eb628d9e164 1052
wim 22:35742ec80c24 1053 if (value) {
wim 21:9eb628d9e164 1054 _lcd_bus |= D_LCD_BL; // Set BL bit
wim 22:35742ec80c24 1055 }
wim 22:35742ec80c24 1056 else {
wim 21:9eb628d9e164 1057 _lcd_bus &= ~D_LCD_BL; // Reset BL bit
wim 22:35742ec80c24 1058 }
wim 21:9eb628d9e164 1059
wim 21:9eb628d9e164 1060 // write the new data to the SPI portexpander
wim 21:9eb628d9e164 1061 _setCS(false);
wim 21:9eb628d9e164 1062 _spi->write(_lcd_bus);
wim 21:9eb628d9e164 1063 _setCS(true);
wim 21:9eb628d9e164 1064
wim 21:9eb628d9e164 1065 }
wim 21:9eb628d9e164 1066
wim 21:9eb628d9e164 1067
wim 21:9eb628d9e164 1068
wim 21:9eb628d9e164 1069 // Place the 4bit data on the databus
wim 21:9eb628d9e164 1070 // Used for mbed pins, I2C bus expander or SPI shiftregister
wim 21:9eb628d9e164 1071 void TextLCD_SPI::_setData(int value) {
wim 21:9eb628d9e164 1072 int data;
wim 21:9eb628d9e164 1073
wim 22:35742ec80c24 1074 // Set bit by bit to support any mapping of expander portpins to LCD pins
wim 22:35742ec80c24 1075
wim 22:35742ec80c24 1076 data = value & 0x0F;
wim 22:35742ec80c24 1077 if (data & 0x01)
wim 22:35742ec80c24 1078 _lcd_bus |= D_LCD_D4; // Set Databit
wim 22:35742ec80c24 1079 else
wim 22:35742ec80c24 1080 _lcd_bus &= ~D_LCD_D4; // Reset Databit
wim 22:35742ec80c24 1081
wim 22:35742ec80c24 1082 if (data & 0x02)
wim 22:35742ec80c24 1083 _lcd_bus |= D_LCD_D5; // Set Databit
wim 22:35742ec80c24 1084 else
wim 22:35742ec80c24 1085 _lcd_bus &= ~D_LCD_D5; // Reset Databit
wim 21:9eb628d9e164 1086
wim 22:35742ec80c24 1087 if (data & 0x04)
wim 22:35742ec80c24 1088 _lcd_bus |= D_LCD_D6; // Set Databit
wim 22:35742ec80c24 1089 else
wim 22:35742ec80c24 1090 _lcd_bus &= ~D_LCD_D6; // Reset Databit
wim 21:9eb628d9e164 1091
wim 22:35742ec80c24 1092 if (data & 0x08)
wim 22:35742ec80c24 1093 _lcd_bus |= D_LCD_D7; // Set Databit
wim 22:35742ec80c24 1094 else
wim 22:35742ec80c24 1095 _lcd_bus &= ~D_LCD_D7; // Reset Databit
wim 21:9eb628d9e164 1096
wim 22:35742ec80c24 1097 // write the new data to the SPI portexpander
wim 22:35742ec80c24 1098 _setCS(false);
wim 22:35742ec80c24 1099 _spi->write(_lcd_bus);
wim 22:35742ec80c24 1100 _setCS(true);
wim 21:9eb628d9e164 1101
wim 21:9eb628d9e164 1102 }
wim 21:9eb628d9e164 1103
wim 21:9eb628d9e164 1104
wim 21:9eb628d9e164 1105 // Set CS line.
wim 21:9eb628d9e164 1106 // Only used for SPI bus
wim 21:9eb628d9e164 1107 void TextLCD_SPI::_setCS(bool value) {
wim 21:9eb628d9e164 1108
wim 21:9eb628d9e164 1109 if (value) {
wim 21:9eb628d9e164 1110 _cs = 1; // Set CS pin
wim 21:9eb628d9e164 1111 }
wim 22:35742ec80c24 1112 else {
wim 21:9eb628d9e164 1113 _cs = 0; // Reset CS pin
wim 22:35742ec80c24 1114 }
wim 21:9eb628d9e164 1115 }
wim 21:9eb628d9e164 1116
wim 21:9eb628d9e164 1117
wim 23:d47f226efb24 1118 //---------- End TextLCD_SPI ------------
wim 22:35742ec80c24 1119
wim 22:35742ec80c24 1120
Sissors 24:fb3399713710 1121 //--------- Start TextLCD_NativeSPI -----------
Sissors 24:fb3399713710 1122
Sissors 24:fb3399713710 1123 /** Create a TextLCD interface using an SPI 74595 portexpander
Sissors 24:fb3399713710 1124 *
Sissors 24:fb3399713710 1125 * @param spi SPI Bus
Sissors 24:fb3399713710 1126 * @param cs chip select pin (active low)
Sissors 24:fb3399713710 1127 * @param type Sets the panel size/addressing mode (default = LCD16x2)
Sissors 24:fb3399713710 1128 * @param ctrl LCD controller (default = HD44780)
Sissors 24:fb3399713710 1129 */
Sissors 24:fb3399713710 1130 TextLCD_NativeSPI::TextLCD_NativeSPI(SPI *spi, PinName cs, PinName rs, LCDType type, PinName bl, LCDCtrl ctrl) :
Sissors 24:fb3399713710 1131 TextLCD_Base(type, ctrl),
Sissors 24:fb3399713710 1132 _spi(spi),
Sissors 24:fb3399713710 1133 _cs(cs),
Sissors 24:fb3399713710 1134 _rs(rs) {
Sissors 24:fb3399713710 1135
Sissors 24:fb3399713710 1136 // Setup the spi for 8 bit data, low steady state clock,
Sissors 24:fb3399713710 1137 // rising edge capture, with a 500KHz or 1MHz clock rate
Sissors 24:fb3399713710 1138 _spi->format(8,0);
Sissors 24:fb3399713710 1139 _spi->frequency(1000000);
Sissors 24:fb3399713710 1140
Sissors 24:fb3399713710 1141 // The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
Sissors 24:fb3399713710 1142 if (bl != NC) {
Sissors 24:fb3399713710 1143 _bl = new DigitalOut(bl); //Construct new pin
Sissors 24:fb3399713710 1144 _bl->write(0); //Deactivate
Sissors 24:fb3399713710 1145 }
Sissors 24:fb3399713710 1146 else {
Sissors 24:fb3399713710 1147 // No Hardware Backlight pin
Sissors 24:fb3399713710 1148 _bl = NULL; //Construct dummy pin
Sissors 24:fb3399713710 1149 }
Sissors 24:fb3399713710 1150
Sissors 24:fb3399713710 1151 _writeByte( 0x39 ); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot IS=1
Sissors 24:fb3399713710 1152 wait_us(30);
Sissors 24:fb3399713710 1153 _init();
Sissors 24:fb3399713710 1154 }
Sissors 24:fb3399713710 1155
Sissors 24:fb3399713710 1156 TextLCD_NativeSPI::~TextLCD_NativeSPI() {
Sissors 24:fb3399713710 1157 if (_bl != NULL) {delete _bl;} // BL pin
Sissors 24:fb3399713710 1158 }
Sissors 24:fb3399713710 1159
Sissors 24:fb3399713710 1160 // Not used in this mode
Sissors 24:fb3399713710 1161 void TextLCD_NativeSPI::_setEnable(bool value) {
Sissors 24:fb3399713710 1162 }
Sissors 24:fb3399713710 1163
Sissors 24:fb3399713710 1164 // Set RS pin
Sissors 24:fb3399713710 1165 // Used for mbed pins, I2C bus expander or SPI shiftregister
Sissors 24:fb3399713710 1166 void TextLCD_NativeSPI::_setRS(bool value) {
Sissors 24:fb3399713710 1167 _rs = value;
Sissors 24:fb3399713710 1168 }
Sissors 24:fb3399713710 1169
Sissors 24:fb3399713710 1170 // Set BL pin
Sissors 24:fb3399713710 1171 void TextLCD_NativeSPI::_setBL(bool value) {
Sissors 24:fb3399713710 1172 if (_bl)
Sissors 24:fb3399713710 1173 _bl->write(value);
Sissors 24:fb3399713710 1174 }
Sissors 24:fb3399713710 1175
Sissors 24:fb3399713710 1176 // Write a byte using SPI
Sissors 24:fb3399713710 1177 void TextLCD_NativeSPI::_writeByte(int value) {
Sissors 24:fb3399713710 1178 _cs = 0;
Sissors 24:fb3399713710 1179 wait_us(1);
Sissors 24:fb3399713710 1180 _spi->write(value);
Sissors 24:fb3399713710 1181 wait_us(1);
Sissors 24:fb3399713710 1182 _cs = 1;
Sissors 24:fb3399713710 1183 }
Sissors 24:fb3399713710 1184
Sissors 24:fb3399713710 1185
Sissors 24:fb3399713710 1186 // Not used in this mode
Sissors 24:fb3399713710 1187 void TextLCD_NativeSPI::_setData(int value) {
Sissors 24:fb3399713710 1188 }
Sissors 24:fb3399713710 1189
Sissors 24:fb3399713710 1190
Sissors 24:fb3399713710 1191 //---------- End TextLCD_NativeSPI ------------
wim 21:9eb628d9e164 1192
wim 21:9eb628d9e164 1193
wim 21:9eb628d9e164 1194
wim 21:9eb628d9e164 1195
wim 21:9eb628d9e164 1196