KRAI ITB GARUDAGO / TextLCD

LCD I2C

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TextLCD.cpp@16:c276b75e6585, 2013-02-20 (annotated)

Committer:
wim
Date:
Wed Feb 20 19:37:53 2013 +0000
Revision:
16:c276b75e6585
Parent:
15:b70ebfffb258
Child:
17:652ab113bc2e
Cleaned up and Commented

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
simon 1:ac48b187213c 6 *
simon 1:ac48b187213c 7 * Permission is hereby granted, free of charge, to any person obtaining a copy
simon 1:ac48b187213c 8 * of this software and associated documentation files (the "Software"), to deal
simon 1:ac48b187213c 9 * in the Software without restriction, including without limitation the rights
simon 1:ac48b187213c 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
simon 1:ac48b187213c 11 * copies of the Software, and to permit persons to whom the Software is
simon 1:ac48b187213c 12 * furnished to do so, subject to the following conditions:
simon 1:ac48b187213c 13 *
simon 1:ac48b187213c 14 * The above copyright notice and this permission notice shall be included in
simon 1:ac48b187213c 15 * all copies or substantial portions of the Software.
simon 1:ac48b187213c 16 *
simon 1:ac48b187213c 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
simon 1:ac48b187213c 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
simon 1:ac48b187213c 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
simon 1:ac48b187213c 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
simon 1:ac48b187213c 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
simon 1:ac48b187213c 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
simon 1:ac48b187213c 23 * THE SOFTWARE.
simon 1:ac48b187213c 24 */
simon 1:ac48b187213c 25
simon 1:ac48b187213c 26 #include "TextLCD.h"
simon 1:ac48b187213c 27 #include "mbed.h"
simon 1:ac48b187213c 28
wim 15:b70ebfffb258 29
wim 15:b70ebfffb258 30 /* Create a TextLCD interface for using regular mbed pins
wim 15:b70ebfffb258 31 *
wim 15:b70ebfffb258 32 * @param rs Instruction/data control line
wim 15:b70ebfffb258 33 * @param e Enable line (clock)
wim 15:b70ebfffb258 34 * @param d4-d7 Data lines for using as a 4-bit interface
wim 15:b70ebfffb258 35 * @param type Sets the panel size/addressing mode (default = LCD16x2)
wim 15:b70ebfffb258 36 * @param e2 Enable2 line (clock for second controller, LCD40x4 only)
wim 15:b70ebfffb258 37 */
wim 13:24506ba22480 38 TextLCD::TextLCD(PinName rs, PinName e,
wim 13:24506ba22480 39 PinName d4, PinName d5, PinName d6, PinName d7,
wim 15:b70ebfffb258 40 LCDType type, PinName e2) : _rs(rs), _e(e), _e2(e2),
wim 15:b70ebfffb258 41 _d(d4, d5, d6, d7),
wim 15:b70ebfffb258 42 _cs(NC),
wim 15:b70ebfffb258 43 _type(type) {
wim 13:24506ba22480 44
wim 13:24506ba22480 45 _busType = _PinBus;
wim 13:24506ba22480 46
wim 13:24506ba22480 47 _init();
wim 13:24506ba22480 48
wim 13:24506ba22480 49 }
wim 13:24506ba22480 50
wim 15:b70ebfffb258 51 /* Create a TextLCD interface using an I2C PC8574 portexpander
wim 15:b70ebfffb258 52 *
wim 15:b70ebfffb258 53 * @param i2c I2C Bus
wim 15:b70ebfffb258 54 * @param deviceAddress I2C slave address (PCF8574)
wim 15:b70ebfffb258 55 * @param type Sets the panel size/addressing mode (default = LCD16x2)
wim 15:b70ebfffb258 56 */
wim 13:24506ba22480 57 TextLCD::TextLCD(I2C *i2c, char deviceAddress, LCDType type) :
wim 15:b70ebfffb258 58 _rs(NC), _e(NC), _e2(NC),
wim 15:b70ebfffb258 59 _d(NC),
wim 15:b70ebfffb258 60 _i2c(i2c),
wim 15:b70ebfffb258 61 _cs(NC),
simon 1:ac48b187213c 62 _type(type) {
wim 15:b70ebfffb258 63
wim 13:24506ba22480 64 _slaveAddress = deviceAddress;
wim 13:24506ba22480 65 _busType = _I2CBus;
simon 1:ac48b187213c 66
wim 13:24506ba22480 67
wim 13:24506ba22480 68 // Init the portexpander bus
wim 15:b70ebfffb258 69 _lcd_bus = D_LCD_BUS_DEF;
wim 13:24506ba22480 70
wim 13:24506ba22480 71 // write the new data to the portexpander
wim 13:24506ba22480 72 _i2c->write(_slaveAddress, &_lcd_bus, 1);
wim 13:24506ba22480 73
wim 13:24506ba22480 74 _init();
wim 13:24506ba22480 75
wim 13:24506ba22480 76 }
simon 1:ac48b187213c 77
wim 15:b70ebfffb258 78 /* Create a TextLCD interface using an SPI 74595 portexpander
wim 15:b70ebfffb258 79 *
wim 15:b70ebfffb258 80 * @param spi SPI Bus
wim 15:b70ebfffb258 81 * @param cs chip select pin (active low)
wim 15:b70ebfffb258 82 * @param type Sets the panel size/addressing mode (default = LCD16x2)
wim 15:b70ebfffb258 83 */
wim 14:0c32b66b14b8 84 TextLCD::TextLCD(SPI *spi, PinName cs, LCDType type) :
wim 15:b70ebfffb258 85 _rs(NC), _e(NC), _e2(NC),
wim 15:b70ebfffb258 86 _d(NC),
wim 15:b70ebfffb258 87 _spi(spi),
wim 15:b70ebfffb258 88 _cs(cs),
wim 14:0c32b66b14b8 89 _type(type) {
wim 14:0c32b66b14b8 90
wim 14:0c32b66b14b8 91 _busType = _SPIBus;
wim 14:0c32b66b14b8 92
wim 14:0c32b66b14b8 93 // Setup the spi for 8 bit data, low steady state clock,
wim 14:0c32b66b14b8 94 // rising edge capture, with a 500KHz or 1MHz clock rate
wim 14:0c32b66b14b8 95 _spi->format(8,0);
wim 14:0c32b66b14b8 96 _spi->frequency(500000);
wim 14:0c32b66b14b8 97 //_spi.frequency(1000000);
wim 14:0c32b66b14b8 98
wim 14:0c32b66b14b8 99
wim 14:0c32b66b14b8 100 // Init the portexpander bus
wim 15:b70ebfffb258 101 _lcd_bus = D_LCD_BUS_DEF;
wim 14:0c32b66b14b8 102
wim 14:0c32b66b14b8 103 // write the new data to the portexpander
wim 14:0c32b66b14b8 104 _setCS(false);
wim 14:0c32b66b14b8 105 _spi->write(_lcd_bus);
wim 14:0c32b66b14b8 106 _setCS(true);
wim 14:0c32b66b14b8 107
wim 14:0c32b66b14b8 108 _init();
wim 14:0c32b66b14b8 109
wim 14:0c32b66b14b8 110 }
wim 14:0c32b66b14b8 111
wim 14:0c32b66b14b8 112
wim 15:b70ebfffb258 113 /* Init the LCD Controller(s)
wim 13:24506ba22480 114 * Clear display
wim 13:24506ba22480 115 */
wim 13:24506ba22480 116 void TextLCD::_init() {
wim 15:b70ebfffb258 117
wim 15:b70ebfffb258 118 // Select and configure second LCD controller when needed
wim 15:b70ebfffb258 119 if(_type==LCD40x4) {
wim 15:b70ebfffb258 120 _ctrl=TextLCD::_LCDCtrl_1; // Select 2nd controller
wim 15:b70ebfffb258 121
wim 15:b70ebfffb258 122 _initCtrl(); // Init 2nd controller
wim 15:b70ebfffb258 123
wim 15:b70ebfffb258 124 // Secondary LCD controller Clearscreen
wim 15:b70ebfffb258 125 _writeCommand(0x01); // cls, and set cursor to 0
wim 15:b70ebfffb258 126 wait_ms(10); // The CLS command takes 1.64 ms.
wim 15:b70ebfffb258 127 // Since we are not using the Busy flag, Lets be safe and take 10 ms
wim 15:b70ebfffb258 128
wim 15:b70ebfffb258 129 }
wim 15:b70ebfffb258 130
wim 15:b70ebfffb258 131 // Select and configure primary LCD controller
wim 15:b70ebfffb258 132 _ctrl=TextLCD::_LCDCtrl_0; // Select primary controller
wim 13:24506ba22480 133
wim 15:b70ebfffb258 134 _initCtrl(); // Init primary controller
wim 15:b70ebfffb258 135
wim 15:b70ebfffb258 136 // Primary LCD controller Clearscreen
wim 15:b70ebfffb258 137 _writeCommand(0x01); // cls, and set cursor to 0
wim 15:b70ebfffb258 138
wim 15:b70ebfffb258 139 wait_ms(10); // The CLS command takes 1.64 ms.
wim 15:b70ebfffb258 140 // Since we are not using the Busy flag, Lets be safe and take 10 ms
wim 15:b70ebfffb258 141
wim 15:b70ebfffb258 142 }
wim 15:b70ebfffb258 143
wim 15:b70ebfffb258 144 /* Init the LCD controller
wim 15:b70ebfffb258 145 * 4-bit mode, number of lines, fonttype, no cursor etc
wim 15:b70ebfffb258 146 *
wim 15:b70ebfffb258 147 */
wim 15:b70ebfffb258 148 void TextLCD::_initCtrl() {
wim 15:b70ebfffb258 149
wim 13:24506ba22480 150 _setRS(false); // command mode
wim 13:24506ba22480 151
wim 15:b70ebfffb258 152 wait_ms(20); // Wait 20ms to ensure powered up
simon 1:ac48b187213c 153
simon 1:ac48b187213c 154 // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
simon 1:ac48b187213c 155 for (int i=0; i<3; i++) {
wim 13:24506ba22480 156 _writeByte(0x3);
wim 15:b70ebfffb258 157 wait_ms(15); // this command takes 1.64ms, so wait for it
simon 1:ac48b187213c 158 }
wim 13:24506ba22480 159 _writeByte(0x2); // 4-bit mode
wim 14:0c32b66b14b8 160 wait_us(40); // most instructions take 40us
wim 14:0c32b66b14b8 161
wim 10:dd9b3a696acd 162 // Display is now in 4-bit mode
wim 10:dd9b3a696acd 163 switch (_type) {
wim 10:dd9b3a696acd 164 case LCD8x1:
wim 15:b70ebfffb258 165 _writeCommand(0x20); // Function set 001 DL N F - -
wim 15:b70ebfffb258 166 // DL=0 (4 bits bus)
wim 13:24506ba22480 167 // N=0 (1 line)
wim 13:24506ba22480 168 // F=0 (5x7 dots font)
wim 10:dd9b3a696acd 169 break;
wim 10:dd9b3a696acd 170
wim 10:dd9b3a696acd 171 case LCD24x4:
wim 10:dd9b3a696acd 172 // Special mode for KS0078
wim 15:b70ebfffb258 173 _writeCommand(0x2A); // Function set 001 DL N RE DH REV
wim 15:b70ebfffb258 174 // DL=0 (4 bits bus)
wim 13:24506ba22480 175 // N=1 (Dont care for KS0078)
wim 13:24506ba22480 176 // RE=0 (Extended Regs, special mode for KS0078)
wim 13:24506ba22480 177 // DH=1 (Disp shift, special mode for KS0078)
wim 13:24506ba22480 178 // REV=0 (Reverse, special mode for KS0078)
wim 10:dd9b3a696acd 179
wim 15:b70ebfffb258 180 _writeCommand(0x2E); // Function set 001 DL N RE DH REV
wim 15:b70ebfffb258 181 // DL=0 (4 bits bus)
wim 13:24506ba22480 182 // N=1 (Dont care for KS0078)
wim 13:24506ba22480 183 // RE=1 (Ena Extended Regs, special mode for KS0078)
wim 13:24506ba22480 184 // DH=1 (Disp shift, special mode for KS0078)
wim 13:24506ba22480 185 // REV=0 (Reverse, special mode for KS0078)
wim 10:dd9b3a696acd 186
wim 13:24506ba22480 187 _writeCommand(0x09); // Ext Function set 0000 1 FW BW NW
wim 13:24506ba22480 188 // FW=0 (5-dot font, special mode for KS0078)
wim 13:24506ba22480 189 // BW=0 (Cur BW invert disable, special mode for KS0078)
wim 13:24506ba22480 190 // NW=1 (4 Line, special mode for KS0078)
wim 10:dd9b3a696acd 191
wim 15:b70ebfffb258 192 _writeCommand(0x2A); // Function set 001 DL N RE DH REV
wim 15:b70ebfffb258 193 // DL=0 (4 bits bus)
wim 13:24506ba22480 194 // N=1 (Dont care for KS0078)
wim 13:24506ba22480 195 // RE=0 (Dis. Extended Regs, special mode for KS0078)
wim 13:24506ba22480 196 // DH=1 (Disp shift, special mode for KS0078)
wim 13:24506ba22480 197 // REV=0 (Reverse, special mode for KS0078)
wim 10:dd9b3a696acd 198 break;
wim 10:dd9b3a696acd 199
wim 15:b70ebfffb258 200 // All other LCD types are initialised as 2 Line displays (including LCD40x4)
wim 10:dd9b3a696acd 201 default:
wim 15:b70ebfffb258 202 _writeCommand(0x28); // Function set 001 DL N F - -
wim 15:b70ebfffb258 203 // DL=0 (4 bits bus)
wim 13:24506ba22480 204 // N=1 (2 lines)
wim 15:b70ebfffb258 205 // F=0 (5x7 dots font, only option for 2 line display)
wim 13:24506ba22480 206 // - (Don't care)
wim 10:dd9b3a696acd 207
wim 10:dd9b3a696acd 208 break;
wim 10:dd9b3a696acd 209 }
wim 10:dd9b3a696acd 210
wim 13:24506ba22480 211 _writeCommand(0x06); // Entry Mode 0000 01 CD S
wim 13:24506ba22480 212 // Cursor Direction and Display Shift
wim 13:24506ba22480 213 // CD=1 (Cur incr)
wim 13:24506ba22480 214 // S=0 (No display shift)
wim 10:dd9b3a696acd 215
wim 13:24506ba22480 216 // _writeCommand(0x0C); // Display Ctrl 0000 1 D C B
wim 13:24506ba22480 217 // // Display On, Cursor Off, Blink Off
wim 15:b70ebfffb258 218 setCursor(TextLCD::CurOff_BlkOff);
wim 15:b70ebfffb258 219
simon 1:ac48b187213c 220 }
simon 1:ac48b187213c 221
wim 8:03116f75b66e 222
wim 16:c276b75e6585 223 // Clear the screen, Cursor home.
wim 15:b70ebfffb258 224 void TextLCD::cls() {
wim 15:b70ebfffb258 225
wim 15:b70ebfffb258 226 // Select and configure second LCD controller when needed
wim 15:b70ebfffb258 227 if(_type==LCD40x4) {
wim 15:b70ebfffb258 228 _ctrl=TextLCD::_LCDCtrl_1; // Select 2nd controller
wim 15:b70ebfffb258 229
wim 15:b70ebfffb258 230 // Second LCD controller Cursor always Off
wim 15:b70ebfffb258 231 _setCursor(TextLCD::CurOff_BlkOff);
wim 15:b70ebfffb258 232
wim 15:b70ebfffb258 233 // Second LCD controller Clearscreen
wim 15:b70ebfffb258 234 _writeCommand(0x01); // cls, and set cursor to 0
wim 15:b70ebfffb258 235
wim 15:b70ebfffb258 236 wait_ms(10); // The CLS command takes 1.64 ms.
wim 15:b70ebfffb258 237 // Since we are not using the Busy flag, Lets be safe and take 10 ms
wim 15:b70ebfffb258 238
wim 15:b70ebfffb258 239
wim 15:b70ebfffb258 240 _ctrl=TextLCD::_LCDCtrl_0; // Select primary controller
wim 15:b70ebfffb258 241 }
wim 15:b70ebfffb258 242
wim 15:b70ebfffb258 243 // Primary LCD controller Clearscreen
wim 15:b70ebfffb258 244 _writeCommand(0x01); // cls, and set cursor to 0
wim 15:b70ebfffb258 245
wim 15:b70ebfffb258 246 wait_ms(10); // The CLS command takes 1.64 ms.
wim 15:b70ebfffb258 247 // Since we are not using the Busy flag, Lets be safe and take 10 ms
wim 15:b70ebfffb258 248
wim 15:b70ebfffb258 249 // Restore cursormode on primary LCD controller when needed
wim 15:b70ebfffb258 250 if(_type==LCD40x4) {
wim 15:b70ebfffb258 251 _setCursor(_currentCursor);
wim 15:b70ebfffb258 252 }
wim 15:b70ebfffb258 253
wim 15:b70ebfffb258 254 _row=0; // Reset Cursor location
wim 15:b70ebfffb258 255 _column=0;
simon 1:ac48b187213c 256 }
simon 1:ac48b187213c 257
wim 16:c276b75e6585 258 // Move cursor to selected row and column
simon 1:ac48b187213c 259 void TextLCD::locate(int column, int row) {
wim 15:b70ebfffb258 260
wim 15:b70ebfffb258 261 // setAddress() does all the heavy lifting:
wim 15:b70ebfffb258 262 // check column and row sanity,
wim 15:b70ebfffb258 263 // switch controllers for LCD40x4 if needed
wim 15:b70ebfffb258 264 // switch cursor for LCD40x4 if needed
wim 15:b70ebfffb258 265 // set the new memory address to show cursor at correct location
wim 15:b70ebfffb258 266 setAddress(column, row);
wim 15:b70ebfffb258 267
wim 15:b70ebfffb258 268 }
wim 15:b70ebfffb258 269
wim 15:b70ebfffb258 270
wim 16:c276b75e6585 271 // Write a single character (Stream implementation)
wim 15:b70ebfffb258 272 int TextLCD::_putc(int value) {
wim 15:b70ebfffb258 273 int addr;
wim 15:b70ebfffb258 274
wim 15:b70ebfffb258 275 if (value == '\n') {
wim 15:b70ebfffb258 276 //No character to write
wim 15:b70ebfffb258 277
wim 15:b70ebfffb258 278 //Update Cursor
wim 15:b70ebfffb258 279 _column = 0;
wim 15:b70ebfffb258 280 _row++;
wim 15:b70ebfffb258 281 if (_row >= rows()) {
wim 15:b70ebfffb258 282 _row = 0;
wim 15:b70ebfffb258 283 }
wim 15:b70ebfffb258 284 }
wim 15:b70ebfffb258 285 else {
wim 15:b70ebfffb258 286 //Character to write
wim 15:b70ebfffb258 287 _writeData(value);
wim 15:b70ebfffb258 288
wim 15:b70ebfffb258 289 //Update Cursor
wim 15:b70ebfffb258 290 _column++;
wim 15:b70ebfffb258 291 if (_column >= columns()) {
wim 15:b70ebfffb258 292 _column = 0;
wim 15:b70ebfffb258 293 _row++;
wim 15:b70ebfffb258 294 if (_row >= rows()) {
wim 15:b70ebfffb258 295 _row = 0;
wim 15:b70ebfffb258 296 }
wim 15:b70ebfffb258 297 }
wim 15:b70ebfffb258 298 } //else
wim 15:b70ebfffb258 299
wim 15:b70ebfffb258 300 //Set next memoryaddress, make sure cursor blinks at next location
wim 15:b70ebfffb258 301 addr = getAddress(_column, _row);
wim 15:b70ebfffb258 302 _writeCommand(0x80 | addr);
wim 15:b70ebfffb258 303
wim 15:b70ebfffb258 304 return value;
wim 15:b70ebfffb258 305 }
wim 15:b70ebfffb258 306
wim 15:b70ebfffb258 307
wim 16:c276b75e6585 308 // get a single character (Stream implementation)
simon 1:ac48b187213c 309 int TextLCD::_getc() {
simon 1:ac48b187213c 310 return -1;
simon 1:ac48b187213c 311 }
simon 1:ac48b187213c 312
wim 16:c276b75e6585 313 // Set E pin (or E2 pin)
wim 16:c276b75e6585 314 // Used for mbed pins, I2C bus expander or SPI shifregister
wim 13:24506ba22480 315 void TextLCD::_setEnable(bool value) {
wim 13:24506ba22480 316
wim 13:24506ba22480 317 switch(_busType) {
wim 13:24506ba22480 318 case _PinBus :
wim 15:b70ebfffb258 319 if(_ctrl==TextLCD::_LCDCtrl_0) {
wim 15:b70ebfffb258 320 if (value)
wim 15:b70ebfffb258 321 _e = 1; // Set E bit
wim 15:b70ebfffb258 322 else
wim 15:b70ebfffb258 323 _e = 0; // Reset E bit
wim 15:b70ebfffb258 324 }
wim 15:b70ebfffb258 325 else {
wim 15:b70ebfffb258 326 if (value)
wim 15:b70ebfffb258 327 _e2 = 1; // Set E2 bit
wim 15:b70ebfffb258 328 else
wim 15:b70ebfffb258 329 _e2 = 0; // Reset E2 bit
wim 15:b70ebfffb258 330 }
wim 15:b70ebfffb258 331
wim 13:24506ba22480 332 break;
wim 13:24506ba22480 333
wim 13:24506ba22480 334 case _I2CBus :
wim 15:b70ebfffb258 335
wim 15:b70ebfffb258 336 if(_ctrl==TextLCD::_LCDCtrl_0) {
wim 15:b70ebfffb258 337 if (value)
wim 15:b70ebfffb258 338 _lcd_bus |= D_LCD_E; // Set E bit
wim 15:b70ebfffb258 339 else
wim 15:b70ebfffb258 340 _lcd_bus &= ~D_LCD_E; // Reset E bit
wim 15:b70ebfffb258 341 }
wim 15:b70ebfffb258 342 else {
wim 15:b70ebfffb258 343 if (value)
wim 15:b70ebfffb258 344 _lcd_bus |= D_LCD_E2; // Set E2 bit
wim 15:b70ebfffb258 345 else
wim 15:b70ebfffb258 346 _lcd_bus &= ~D_LCD_E2; // Reset E2bit
wim 15:b70ebfffb258 347 }
wim 15:b70ebfffb258 348
wim 15:b70ebfffb258 349 // write the new data to the I2C portexpander
wim 14:0c32b66b14b8 350 _i2c->write(_slaveAddress, &_lcd_bus, 1);
wim 15:b70ebfffb258 351
wim 13:24506ba22480 352 break;
wim 13:24506ba22480 353
wim 13:24506ba22480 354 case _SPIBus :
wim 15:b70ebfffb258 355 if(_ctrl==TextLCD::_LCDCtrl_0) {
wim 15:b70ebfffb258 356 if (value)
wim 15:b70ebfffb258 357 _lcd_bus |= D_LCD_E; // Set E bit
wim 15:b70ebfffb258 358 else
wim 15:b70ebfffb258 359 _lcd_bus &= ~D_LCD_E; // Reset E bit
wim 15:b70ebfffb258 360 }
wim 15:b70ebfffb258 361 else {
wim 15:b70ebfffb258 362 if (value)
wim 15:b70ebfffb258 363 _lcd_bus |= D_LCD_E2; // Set E2 bit
wim 15:b70ebfffb258 364 else
wim 15:b70ebfffb258 365 _lcd_bus &= ~D_LCD_E2; // Reset E2 bit
wim 15:b70ebfffb258 366 }
wim 15:b70ebfffb258 367
wim 15:b70ebfffb258 368 // write the new data to the SPI portexpander
wim 14:0c32b66b14b8 369 _setCS(false);
wim 14:0c32b66b14b8 370 _spi->write(_lcd_bus);
wim 14:0c32b66b14b8 371 _setCS(true);
wim 14:0c32b66b14b8 372
wim 13:24506ba22480 373 break;
wim 13:24506ba22480 374 }
wim 13:24506ba22480 375 }
wim 13:24506ba22480 376
wim 16:c276b75e6585 377 // Set RS pin
wim 16:c276b75e6585 378 // Used for mbed pins, I2C bus expander or SPI shifregister
wim 13:24506ba22480 379 void TextLCD::_setRS(bool value) {
wim 13:24506ba22480 380
wim 13:24506ba22480 381 switch(_busType) {
wim 13:24506ba22480 382 case _PinBus :
wim 13:24506ba22480 383 if (value)
wim 13:24506ba22480 384 _rs = 1; // Set RS bit
wim 13:24506ba22480 385 else
wim 13:24506ba22480 386 _rs = 0; // Reset RS bit
wim 13:24506ba22480 387
wim 13:24506ba22480 388 break;
wim 13:24506ba22480 389
wim 13:24506ba22480 390 case _I2CBus :
wim 14:0c32b66b14b8 391 if (value)
wim 14:0c32b66b14b8 392 _lcd_bus |= D_LCD_RS; // Set RS bit
wim 14:0c32b66b14b8 393 else
wim 14:0c32b66b14b8 394 _lcd_bus &= ~D_LCD_RS; // Reset RS bit
wim 13:24506ba22480 395
wim 15:b70ebfffb258 396 // write the new data to the I2C portexpander
wim 14:0c32b66b14b8 397 _i2c->write(_slaveAddress, &_lcd_bus, 1);
wim 13:24506ba22480 398
wim 13:24506ba22480 399 break;
wim 13:24506ba22480 400
wim 13:24506ba22480 401 case _SPIBus :
wim 14:0c32b66b14b8 402 if (value)
wim 14:0c32b66b14b8 403 _lcd_bus |= D_LCD_RS; // Set RS bit
wim 14:0c32b66b14b8 404 else
wim 14:0c32b66b14b8 405 _lcd_bus &= ~D_LCD_RS; // Reset RS bit
wim 14:0c32b66b14b8 406
wim 15:b70ebfffb258 407 // write the new data to the SPI portexpander
wim 14:0c32b66b14b8 408 _setCS(false);
wim 14:0c32b66b14b8 409 _spi->write(_lcd_bus);
wim 14:0c32b66b14b8 410 _setCS(true);
wim 14:0c32b66b14b8 411
wim 13:24506ba22480 412 break;
wim 13:24506ba22480 413 }
wim 13:24506ba22480 414
wim 13:24506ba22480 415 }
wim 13:24506ba22480 416
wim 16:c276b75e6585 417 // Place the 4bit data on the databus
wim 16:c276b75e6585 418 // Used for mbed pins, I2C bus expander or SPI shifregister
wim 13:24506ba22480 419 void TextLCD::_setData(int value) {
wim 13:24506ba22480 420 int data;
wim 13:24506ba22480 421
wim 13:24506ba22480 422 switch(_busType) {
wim 13:24506ba22480 423 case _PinBus :
wim 13:24506ba22480 424 _d = value & 0x0F; // Write Databits
wim 13:24506ba22480 425
wim 13:24506ba22480 426 break;
wim 13:24506ba22480 427
wim 13:24506ba22480 428 case _I2CBus :
wim 13:24506ba22480 429 data = value & 0x0F;
wim 13:24506ba22480 430 if (data & 0x01)
wim 13:24506ba22480 431 _lcd_bus |= D_LCD_D4; // Set Databit
wim 13:24506ba22480 432 else
wim 13:24506ba22480 433 _lcd_bus &= ~D_LCD_D4; // Reset Databit
wim 13:24506ba22480 434
wim 13:24506ba22480 435 if (data & 0x02)
wim 13:24506ba22480 436 _lcd_bus |= D_LCD_D5; // Set Databit
wim 13:24506ba22480 437 else
wim 13:24506ba22480 438 _lcd_bus &= ~D_LCD_D5; // Reset Databit
wim 13:24506ba22480 439
wim 13:24506ba22480 440 if (data & 0x04)
wim 13:24506ba22480 441 _lcd_bus |= D_LCD_D6; // Set Databit
wim 13:24506ba22480 442 else
wim 13:24506ba22480 443 _lcd_bus &= ~D_LCD_D6; // Reset Databit
wim 13:24506ba22480 444
wim 13:24506ba22480 445 if (data & 0x08)
wim 13:24506ba22480 446 _lcd_bus |= D_LCD_D7; // Set Databit
wim 13:24506ba22480 447 else
wim 13:24506ba22480 448 _lcd_bus &= ~D_LCD_D7; // Reset Databit
wim 13:24506ba22480 449
wim 15:b70ebfffb258 450 // write the new data to the I2C portexpander
wim 13:24506ba22480 451 _i2c->write(_slaveAddress, &_lcd_bus, 1);
wim 13:24506ba22480 452
wim 13:24506ba22480 453 break;
wim 13:24506ba22480 454
wim 13:24506ba22480 455 case _SPIBus :
wim 14:0c32b66b14b8 456
wim 14:0c32b66b14b8 457 data = value & 0x0F;
wim 14:0c32b66b14b8 458 if (data & 0x01)
wim 14:0c32b66b14b8 459 _lcd_bus |= D_LCD_D4; // Set Databit
wim 14:0c32b66b14b8 460 else
wim 14:0c32b66b14b8 461 _lcd_bus &= ~D_LCD_D4; // Reset Databit
wim 14:0c32b66b14b8 462
wim 14:0c32b66b14b8 463 if (data & 0x02)
wim 14:0c32b66b14b8 464 _lcd_bus |= D_LCD_D5; // Set Databit
wim 14:0c32b66b14b8 465 else
wim 14:0c32b66b14b8 466 _lcd_bus &= ~D_LCD_D5; // Reset Databit
wim 14:0c32b66b14b8 467
wim 14:0c32b66b14b8 468 if (data & 0x04)
wim 14:0c32b66b14b8 469 _lcd_bus |= D_LCD_D6; // Set Databit
wim 14:0c32b66b14b8 470 else
wim 14:0c32b66b14b8 471 _lcd_bus &= ~D_LCD_D6; // Reset Databit
wim 14:0c32b66b14b8 472
wim 14:0c32b66b14b8 473 if (data & 0x08)
wim 14:0c32b66b14b8 474 _lcd_bus |= D_LCD_D7; // Set Databit
wim 14:0c32b66b14b8 475 else
wim 14:0c32b66b14b8 476 _lcd_bus &= ~D_LCD_D7; // Reset Databit
wim 14:0c32b66b14b8 477
wim 15:b70ebfffb258 478 // write the new data to the SPI portexpander
wim 14:0c32b66b14b8 479 _setCS(false);
wim 14:0c32b66b14b8 480 _spi->write(_lcd_bus);
wim 14:0c32b66b14b8 481 _setCS(true);
wim 14:0c32b66b14b8 482
wim 14:0c32b66b14b8 483 break;
wim 13:24506ba22480 484 }
wim 13:24506ba22480 485
wim 13:24506ba22480 486 }
wim 13:24506ba22480 487
wim 13:24506ba22480 488
wim 16:c276b75e6585 489 // Set CS line.
wim 16:c276b75e6585 490 // Only used for SPI bus
wim 14:0c32b66b14b8 491 void TextLCD::_setCS(bool value) {
wim 14:0c32b66b14b8 492
wim 15:b70ebfffb258 493 if (value) {
wim 14:0c32b66b14b8 494 _cs = 1; // Set CS pin
wim 15:b70ebfffb258 495 }
wim 14:0c32b66b14b8 496 else
wim 14:0c32b66b14b8 497 _cs = 0; // Reset CS pin
wim 15:b70ebfffb258 498
wim 14:0c32b66b14b8 499 }
wim 14:0c32b66b14b8 500
wim 14:0c32b66b14b8 501
wim 16:c276b75e6585 502 // Write a byte using the 4-bit interface
wim 16:c276b75e6585 503 // Used for mbed pins, I2C bus expander or SPI shifregister
wim 13:24506ba22480 504 void TextLCD::_writeByte(int value) {
wim 15:b70ebfffb258 505
wim 15:b70ebfffb258 506 // Enable is Low
wim 15:b70ebfffb258 507 _setEnable(true);
wim 16:c276b75e6585 508 _setData(value >> 4); // High nibble
wim 15:b70ebfffb258 509 wait_us(1); // Data setup time
wim 15:b70ebfffb258 510 _setEnable(false);
wim 15:b70ebfffb258 511 wait_us(1); // Data hold time
wim 15:b70ebfffb258 512
wim 13:24506ba22480 513 _setEnable(true);
wim 16:c276b75e6585 514 _setData(value >> 0); // Low nibble
wim 15:b70ebfffb258 515 wait_us(1); // Data setup time
wim 13:24506ba22480 516 _setEnable(false);
wim 15:b70ebfffb258 517 wait_us(1); // Datahold time
wim 15:b70ebfffb258 518
wim 15:b70ebfffb258 519 // Enable is Low
wim 15:b70ebfffb258 520
simon 1:ac48b187213c 521 }
simon 1:ac48b187213c 522
wim 13:24506ba22480 523 void TextLCD::_writeCommand(int command) {
wim 15:b70ebfffb258 524
wim 13:24506ba22480 525 _setRS(false);
wim 16:c276b75e6585 526 wait_us(1); // Data setup time for RS
wim 15:b70ebfffb258 527
wim 15:b70ebfffb258 528 _writeByte(command);
wim 15:b70ebfffb258 529 wait_us(40); // most instructions take 40us
simon 1:ac48b187213c 530 }
simon 1:ac48b187213c 531
wim 13:24506ba22480 532 void TextLCD::_writeData(int data) {
wim 15:b70ebfffb258 533
wim 13:24506ba22480 534 _setRS(true);
wim 16:c276b75e6585 535 wait_us(1); // Data setup time for RS
wim 15:b70ebfffb258 536
wim 13:24506ba22480 537 _writeByte(data);
wim 15:b70ebfffb258 538 wait_us(40); // data writes take 40us
simon 1:ac48b187213c 539 }
simon 1:ac48b187213c 540
wim 8:03116f75b66e 541
wim 8:03116f75b66e 542 #if (0)
wim 16:c276b75e6585 543 // This is the original _address() method.
wim 8:03116f75b66e 544 // It is confusing since it returns the memoryaddress or-ed with the set memorycommand 0x80.
wim 8:03116f75b66e 545 // Left it in here for compatibility with older code. New applications should use getAddress() instead.
wim 8:03116f75b66e 546 //
wim 13:24506ba22480 547 int TextLCD::_address(int column, int row) {
simon 1:ac48b187213c 548 switch (_type) {
simon 1:ac48b187213c 549 case LCD20x4:
simon 1:ac48b187213c 550 switch (row) {
simon 1:ac48b187213c 551 case 0:
simon 1:ac48b187213c 552 return 0x80 + column;
simon 1:ac48b187213c 553 case 1:
simon 1:ac48b187213c 554 return 0xc0 + column;
simon 1:ac48b187213c 555 case 2:
simon 1:ac48b187213c 556 return 0x94 + column;
simon 1:ac48b187213c 557 case 3:
simon 1:ac48b187213c 558 return 0xd4 + column;
simon 1:ac48b187213c 559 }
simon 1:ac48b187213c 560 case LCD16x2B:
simon 4:bf5b706f8d32 561 return 0x80 + (row * 40) + column;
simon 1:ac48b187213c 562 case LCD16x2:
simon 1:ac48b187213c 563 case LCD20x2:
simon 1:ac48b187213c 564 default:
simon 4:bf5b706f8d32 565 return 0x80 + (row * 0x40) + column;
simon 1:ac48b187213c 566 }
simon 1:ac48b187213c 567 }
wim 8:03116f75b66e 568 #endif
wim 8:03116f75b66e 569
wim 8:03116f75b66e 570
wim 16:c276b75e6585 571 // This replaces the original _address() method.
wim 8:03116f75b66e 572 // Left it in here for compatibility with older code. New applications should use getAddress() instead.
wim 13:24506ba22480 573 int TextLCD::_address(int column, int row) {
wim 8:03116f75b66e 574 return 0x80 | getAddress(column, row);
wim 8:03116f75b66e 575 }
wim 8:03116f75b66e 576
wim 8:03116f75b66e 577 // This is new method to return the memory address based on row, column and displaytype.
wim 8:03116f75b66e 578 //
wim 8:03116f75b66e 579 int TextLCD::getAddress(int column, int row) {
wim 8:03116f75b66e 580
wim 8:03116f75b66e 581 switch (_type) {
wim 8:03116f75b66e 582 case LCD8x1:
wim 8:03116f75b66e 583 return 0x00 + column;
wim 8:03116f75b66e 584
wim 13:24506ba22480 585 case LCD16x1:
wim 13:24506ba22480 586 // LCD16x1 is a special layout of LCD8x2
wim 13:24506ba22480 587 if (column<8)
wim 13:24506ba22480 588 return 0x00 + column;
wim 13:24506ba22480 589 else
wim 13:24506ba22480 590 return 0x40 + (column - 8);
wim 13:24506ba22480 591
wim 15:b70ebfffb258 592 case LCD12x4:
wim 15:b70ebfffb258 593 switch (row) {
wim 15:b70ebfffb258 594 case 0:
wim 15:b70ebfffb258 595 return 0x00 + column;
wim 15:b70ebfffb258 596 case 1:
wim 15:b70ebfffb258 597 return 0x40 + column;
wim 15:b70ebfffb258 598 case 2:
wim 15:b70ebfffb258 599 return 0x0C + column;
wim 15:b70ebfffb258 600 case 3:
wim 15:b70ebfffb258 601 return 0x4C + column;
wim 15:b70ebfffb258 602 }
wim 15:b70ebfffb258 603
wim 8:03116f75b66e 604 case LCD16x4:
wim 8:03116f75b66e 605 switch (row) {
wim 8:03116f75b66e 606 case 0:
wim 8:03116f75b66e 607 return 0x00 + column;
wim 8:03116f75b66e 608 case 1:
wim 8:03116f75b66e 609 return 0x40 + column;
wim 8:03116f75b66e 610 case 2:
wim 8:03116f75b66e 611 return 0x10 + column;
wim 8:03116f75b66e 612 case 3:
wim 8:03116f75b66e 613 return 0x50 + column;
wim 8:03116f75b66e 614 }
wim 8:03116f75b66e 615
wim 8:03116f75b66e 616 case LCD20x4:
wim 8:03116f75b66e 617 switch (row) {
wim 8:03116f75b66e 618 case 0:
wim 8:03116f75b66e 619 return 0x00 + column;
wim 8:03116f75b66e 620 case 1:
wim 8:03116f75b66e 621 return 0x40 + column;
wim 8:03116f75b66e 622 case 2:
wim 8:03116f75b66e 623 return 0x14 + column;
wim 8:03116f75b66e 624 case 3:
wim 8:03116f75b66e 625 return 0x54 + column;
wim 8:03116f75b66e 626 }
wim 8:03116f75b66e 627
wim 10:dd9b3a696acd 628 // Special mode for KS0078
wim 10:dd9b3a696acd 629 case LCD24x4:
wim 10:dd9b3a696acd 630 switch (row) {
wim 10:dd9b3a696acd 631 case 0:
wim 10:dd9b3a696acd 632 return 0x00 + column;
wim 10:dd9b3a696acd 633 case 1:
wim 10:dd9b3a696acd 634 return 0x20 + column;
wim 10:dd9b3a696acd 635 case 2:
wim 10:dd9b3a696acd 636 return 0x40 + column;
wim 10:dd9b3a696acd 637 case 3:
wim 10:dd9b3a696acd 638 return 0x60 + column;
wim 10:dd9b3a696acd 639 }
wim 10:dd9b3a696acd 640
wim 8:03116f75b66e 641 // Not sure about this one, seems wrong.
wim 8:03116f75b66e 642 case LCD16x2B:
wim 8:03116f75b66e 643 return 0x00 + (row * 40) + column;
wim 8:03116f75b66e 644
wim 8:03116f75b66e 645 case LCD8x2:
wim 15:b70ebfffb258 646 case LCD12x2:
wim 8:03116f75b66e 647 case LCD16x2:
wim 8:03116f75b66e 648 case LCD20x2:
wim 8:03116f75b66e 649 case LCD24x2:
wim 9:0893d986e717 650 case LCD40x2:
wim 8:03116f75b66e 651 return 0x00 + (row * 0x40) + column;
wim 15:b70ebfffb258 652
wim 15:b70ebfffb258 653 case LCD40x4:
wim 15:b70ebfffb258 654 // LCD40x4 is a special case since it has 2 controllers
wim 15:b70ebfffb258 655 // Each controller is configured as 40x2
wim 15:b70ebfffb258 656 if (row<2) {
wim 15:b70ebfffb258 657 // Test to see if we need to switch between controllers
wim 15:b70ebfffb258 658 if (_ctrl != _LCDCtrl_0) {
wim 15:b70ebfffb258 659 // Second LCD controller Cursor Off
wim 15:b70ebfffb258 660 _setCursor(TextLCD::CurOff_BlkOff);
wim 15:b70ebfffb258 661
wim 15:b70ebfffb258 662 // Select primary controller
wim 15:b70ebfffb258 663 _ctrl = _LCDCtrl_0;
wim 15:b70ebfffb258 664
wim 15:b70ebfffb258 665 // Restore cursormode on primary LCD controller
wim 15:b70ebfffb258 666 _setCursor(_currentCursor);
wim 15:b70ebfffb258 667 }
wim 15:b70ebfffb258 668
wim 15:b70ebfffb258 669 return 0x00 + (row * 0x40) + column;
wim 15:b70ebfffb258 670 }
wim 15:b70ebfffb258 671 else {
wim 15:b70ebfffb258 672
wim 15:b70ebfffb258 673 // Test to see if we need to switch between controllers
wim 15:b70ebfffb258 674 if (_ctrl != _LCDCtrl_1) {
wim 15:b70ebfffb258 675 // Primary LCD controller Cursor Off
wim 15:b70ebfffb258 676 _setCursor(TextLCD::CurOff_BlkOff);
wim 15:b70ebfffb258 677
wim 15:b70ebfffb258 678 // Select secondary controller
wim 15:b70ebfffb258 679 _ctrl = _LCDCtrl_1;
wim 15:b70ebfffb258 680
wim 15:b70ebfffb258 681 // Restore cursormode on secondary LCD controller
wim 15:b70ebfffb258 682 _setCursor(_currentCursor);
wim 15:b70ebfffb258 683 }
wim 15:b70ebfffb258 684
wim 15:b70ebfffb258 685 return 0x00 + ((row-2) * 0x40) + column;
wim 15:b70ebfffb258 686 }
wim 8:03116f75b66e 687
wim 8:03116f75b66e 688 // Should never get here.
wim 8:03116f75b66e 689 default:
wim 8:03116f75b66e 690 return 0x00;
wim 8:03116f75b66e 691 }
wim 8:03116f75b66e 692 }
wim 8:03116f75b66e 693
wim 8:03116f75b66e 694
wim 15:b70ebfffb258 695 // Set row, column and update memoryaddress.
wim 8:03116f75b66e 696 //
wim 8:03116f75b66e 697 void TextLCD::setAddress(int column, int row) {
wim 15:b70ebfffb258 698
wim 15:b70ebfffb258 699 // Sanity Check column
wim 15:b70ebfffb258 700 if (column < 0) {
wim 15:b70ebfffb258 701 _column = 0;
wim 15:b70ebfffb258 702 }
wim 15:b70ebfffb258 703 else if (column >= columns()) {
wim 15:b70ebfffb258 704 _column = columns() - 1;
wim 15:b70ebfffb258 705 } else _column = column;
wim 8:03116f75b66e 706
wim 15:b70ebfffb258 707 // Sanity Check row
wim 15:b70ebfffb258 708 if (row < 0) {
wim 15:b70ebfffb258 709 _row = 0;
wim 15:b70ebfffb258 710 }
wim 15:b70ebfffb258 711 else if (row >= rows()) {
wim 15:b70ebfffb258 712 _row = rows() - 1;
wim 15:b70ebfffb258 713 } else _row = row;
wim 15:b70ebfffb258 714
wim 15:b70ebfffb258 715
wim 15:b70ebfffb258 716 // Compute the memory address
wim 15:b70ebfffb258 717 // For LCD40x4: switch controllers if needed
wim 15:b70ebfffb258 718 // switch cursor if needed
wim 15:b70ebfffb258 719 int addr = getAddress(_column, _row);
wim 8:03116f75b66e 720
wim 13:24506ba22480 721 _writeCommand(0x80 | addr);
wim 8:03116f75b66e 722 }
simon 1:ac48b187213c 723
simon 1:ac48b187213c 724 int TextLCD::columns() {
simon 1:ac48b187213c 725 switch (_type) {
wim 8:03116f75b66e 726 case LCD8x1:
wim 8:03116f75b66e 727 case LCD8x2:
wim 8:03116f75b66e 728 return 8;
wim 15:b70ebfffb258 729
wim 15:b70ebfffb258 730 case LCD12x2:
wim 15:b70ebfffb258 731 case LCD12x4:
wim 15:b70ebfffb258 732 return 12;
wim 8:03116f75b66e 733
wim 13:24506ba22480 734 case LCD16x1:
simon 1:ac48b187213c 735 case LCD16x2:
simon 1:ac48b187213c 736 case LCD16x2B:
wim 8:03116f75b66e 737 case LCD16x4:
wim 8:03116f75b66e 738 return 16;
wim 8:03116f75b66e 739
wim 8:03116f75b66e 740 case LCD20x2:
wim 8:03116f75b66e 741 case LCD20x4:
wim 8:03116f75b66e 742 return 20;
wim 8:03116f75b66e 743
wim 8:03116f75b66e 744 case LCD24x2:
wim 10:dd9b3a696acd 745 case LCD24x4:
wim 8:03116f75b66e 746 return 24;
wim 9:0893d986e717 747
wim 9:0893d986e717 748 case LCD40x2:
wim 15:b70ebfffb258 749 case LCD40x4:
wim 9:0893d986e717 750 return 40;
wim 8:03116f75b66e 751
wim 8:03116f75b66e 752 // Should never get here.
simon 1:ac48b187213c 753 default:
wim 8:03116f75b66e 754 return 0;
simon 1:ac48b187213c 755 }
simon 1:ac48b187213c 756 }
simon 1:ac48b187213c 757
simon 1:ac48b187213c 758 int TextLCD::rows() {
simon 1:ac48b187213c 759 switch (_type) {
wim 8:03116f75b66e 760 case LCD8x1:
wim 13:24506ba22480 761 case LCD16x1:
wim 8:03116f75b66e 762 return 1;
wim 8:03116f75b66e 763
wim 15:b70ebfffb258 764 case LCD8x2:
wim 15:b70ebfffb258 765 case LCD12x2:
simon 1:ac48b187213c 766 case LCD16x2:
simon 1:ac48b187213c 767 case LCD16x2B:
simon 1:ac48b187213c 768 case LCD20x2:
wim 8:03116f75b66e 769 case LCD24x2:
wim 9:0893d986e717 770 case LCD40x2:
wim 8:03116f75b66e 771 return 2;
wim 8:03116f75b66e 772
wim 15:b70ebfffb258 773 case LCD12x4:
wim 8:03116f75b66e 774 case LCD16x4:
wim 8:03116f75b66e 775 case LCD20x4:
wim 10:dd9b3a696acd 776 case LCD24x4:
wim 15:b70ebfffb258 777 case LCD40x4:
wim 8:03116f75b66e 778 return 4;
wim 12:6bf9d9957d31 779
wim 12:6bf9d9957d31 780 // Should never get here.
simon 1:ac48b187213c 781 default:
wim 8:03116f75b66e 782 return 0;
simon 1:ac48b187213c 783 }
simon 1:ac48b187213c 784 }
wim 10:dd9b3a696acd 785
wim 10:dd9b3a696acd 786
wim 13:24506ba22480 787 void TextLCD::setCursor(TextLCD::LCDCursor show) {
wim 15:b70ebfffb258 788
wim 15:b70ebfffb258 789 // Save new cursor mode, needed when 2 controllers are in use
wim 15:b70ebfffb258 790 _currentCursor = show;
wim 10:dd9b3a696acd 791
wim 15:b70ebfffb258 792 // Configure current LCD controller
wim 15:b70ebfffb258 793 _setCursor(_currentCursor);
wim 15:b70ebfffb258 794
wim 15:b70ebfffb258 795 }
wim 15:b70ebfffb258 796
wim 15:b70ebfffb258 797 void TextLCD::_setCursor(TextLCD::LCDCursor show) {
wim 15:b70ebfffb258 798
wim 15:b70ebfffb258 799 // Configure current LCD controller
wim 10:dd9b3a696acd 800 switch (show) {
wim 13:24506ba22480 801 case CurOff_BlkOff : _writeCommand(0x0C); // Cursor off and Blink Off
wim 11:9ec02df863a1 802 break;
wim 11:9ec02df863a1 803
wim 15:b70ebfffb258 804 case CurOn_BlkOff : _writeCommand(0x0E); // Cursor on and Blink Off
wim 11:9ec02df863a1 805 break;
wim 11:9ec02df863a1 806
wim 13:24506ba22480 807 case CurOff_BlkOn : _writeCommand(0x0D); // Cursor off and Blink On
wim 11:9ec02df863a1 808 break;
wim 11:9ec02df863a1 809
wim 15:b70ebfffb258 810 case CurOn_BlkOn : _writeCommand(0x0F); // Cursor on and Blink char
wim 11:9ec02df863a1 811 break;
wim 11:9ec02df863a1 812
wim 12:6bf9d9957d31 813 // Should never get here.
wim 10:dd9b3a696acd 814 default :
wim 11:9ec02df863a1 815 break;
wim 16:c276b75e6585 816
wim 10:dd9b3a696acd 817 }
wim 10:dd9b3a696acd 818 }
wim 10:dd9b3a696acd 819
wim 10:dd9b3a696acd 820
wim 11:9ec02df863a1 821 void TextLCD::setUDC(unsigned char c, char *udc_data) {
wim 15:b70ebfffb258 822
wim 15:b70ebfffb258 823 // Select and configure second LCD controller when needed
wim 15:b70ebfffb258 824 if(_type==LCD40x4) {
wim 15:b70ebfffb258 825 _LCDCtrl current_ctrl = _ctrl; // Temp save current controller
wim 15:b70ebfffb258 826
wim 15:b70ebfffb258 827 // Select primary controller
wim 15:b70ebfffb258 828 _ctrl=TextLCD::_LCDCtrl_0;
wim 15:b70ebfffb258 829
wim 15:b70ebfffb258 830 // Configure primary LCD controller
wim 15:b70ebfffb258 831 _setUDC(c, udc_data);
wim 15:b70ebfffb258 832
wim 15:b70ebfffb258 833 // Select 2nd controller
wim 15:b70ebfffb258 834 _ctrl=TextLCD::_LCDCtrl_1;
wim 15:b70ebfffb258 835
wim 15:b70ebfffb258 836 // Configure secondary LCD controller
wim 15:b70ebfffb258 837 _setUDC(c, udc_data);
wim 11:9ec02df863a1 838
wim 15:b70ebfffb258 839 // Restore current controller
wim 15:b70ebfffb258 840 _ctrl=current_ctrl;
wim 15:b70ebfffb258 841 }
wim 15:b70ebfffb258 842 else {
wim 15:b70ebfffb258 843 // Configure primary LCD controller
wim 15:b70ebfffb258 844 _setUDC(c, udc_data);
wim 15:b70ebfffb258 845 }
wim 15:b70ebfffb258 846
wim 15:b70ebfffb258 847 }
wim 15:b70ebfffb258 848
wim 15:b70ebfffb258 849 void TextLCD::_setUDC(unsigned char c, char *udc_data) {
wim 15:b70ebfffb258 850
wim 15:b70ebfffb258 851 // Select CG RAM for current LCD controller
wim 15:b70ebfffb258 852 _writeCommand(0x40 + ((c & 0x07) << 3)); //Set CG-RAM address,
wim 15:b70ebfffb258 853 //8 sequential locations needed per UDC
wim 15:b70ebfffb258 854 // Store UDC pattern
wim 11:9ec02df863a1 855 for (int i=0; i<8; i++) {
wim 13:24506ba22480 856 _writeData(*udc_data++);
wim 11:9ec02df863a1 857 }
wim 15:b70ebfffb258 858
wim 15:b70ebfffb258 859 //Select DD RAM again for current LCD controller
wim 15:b70ebfffb258 860 int addr = getAddress(_column, _row);
wim 15:b70ebfffb258 861 _writeCommand(0x80 | addr);
wim 15:b70ebfffb258 862
wim 11:9ec02df863a1 863 }