display funciona!
Dependents: 2018_I2C_LCD_03 TBI_FIAT_FEEDFORWARD Ignition Can_between_NUCLEOS_LCD ... more
Fork of TextLCD by
TextLCD.cpp@13:24506ba22480, 2013-02-09 (annotated)
- Committer:
- wim
- Date:
- Sat Feb 09 15:10:36 2013 +0000
- Revision:
- 13:24506ba22480
- Parent:
- 12:6bf9d9957d31
- Child:
- 14:0c32b66b14b8
First version with I2C interface, refactored code
Who changed what in which revision?
User | Revision | Line number | New 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 | 12:6bf9d9957d31 | 3 | * 2013, WH, Added LCD types, fixed LCD address issues, added Cursor and UDCs |
simon | 1:ac48b187213c | 4 | * |
simon | 1:ac48b187213c | 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
simon | 1:ac48b187213c | 6 | * of this software and associated documentation files (the "Software"), to deal |
simon | 1:ac48b187213c | 7 | * in the Software without restriction, including without limitation the rights |
simon | 1:ac48b187213c | 8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
simon | 1:ac48b187213c | 9 | * copies of the Software, and to permit persons to whom the Software is |
simon | 1:ac48b187213c | 10 | * furnished to do so, subject to the following conditions: |
simon | 1:ac48b187213c | 11 | * |
simon | 1:ac48b187213c | 12 | * The above copyright notice and this permission notice shall be included in |
simon | 1:ac48b187213c | 13 | * all copies or substantial portions of the Software. |
simon | 1:ac48b187213c | 14 | * |
simon | 1:ac48b187213c | 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
simon | 1:ac48b187213c | 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
simon | 1:ac48b187213c | 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
simon | 1:ac48b187213c | 18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
simon | 1:ac48b187213c | 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
simon | 1:ac48b187213c | 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
simon | 1:ac48b187213c | 21 | * THE SOFTWARE. |
simon | 1:ac48b187213c | 22 | */ |
simon | 1:ac48b187213c | 23 | |
simon | 1:ac48b187213c | 24 | #include "TextLCD.h" |
simon | 1:ac48b187213c | 25 | #include "mbed.h" |
simon | 1:ac48b187213c | 26 | |
wim | 13:24506ba22480 | 27 | TextLCD::TextLCD(PinName rs, PinName e, |
wim | 13:24506ba22480 | 28 | PinName d4, PinName d5, PinName d6, PinName d7, |
wim | 13:24506ba22480 | 29 | LCDType type): _rs(rs), _e(e), |
wim | 13:24506ba22480 | 30 | _d(d4, d5, d6, d7), |
wim | 13:24506ba22480 | 31 | _type(type) { |
wim | 13:24506ba22480 | 32 | |
wim | 13:24506ba22480 | 33 | |
wim | 13:24506ba22480 | 34 | _busType = _PinBus; |
wim | 13:24506ba22480 | 35 | |
wim | 13:24506ba22480 | 36 | _init(); |
wim | 13:24506ba22480 | 37 | |
wim | 13:24506ba22480 | 38 | } |
wim | 13:24506ba22480 | 39 | |
wim | 13:24506ba22480 | 40 | |
wim | 13:24506ba22480 | 41 | TextLCD::TextLCD(I2C *i2c, char deviceAddress, LCDType type) : |
wim | 13:24506ba22480 | 42 | _rs(NC), _e(NC), _d(NC), |
wim | 13:24506ba22480 | 43 | _i2c(i2c), |
simon | 1:ac48b187213c | 44 | _type(type) { |
wim | 13:24506ba22480 | 45 | |
wim | 13:24506ba22480 | 46 | _slaveAddress = deviceAddress; |
wim | 13:24506ba22480 | 47 | _busType = _I2CBus; |
simon | 1:ac48b187213c | 48 | |
wim | 13:24506ba22480 | 49 | |
wim | 13:24506ba22480 | 50 | // Init the portexpander bus |
wim | 13:24506ba22480 | 51 | _lcd_bus = 0x80; |
wim | 13:24506ba22480 | 52 | |
wim | 13:24506ba22480 | 53 | // write the new data to the portexpander |
wim | 13:24506ba22480 | 54 | _i2c->write(_slaveAddress, &_lcd_bus, 1); |
wim | 13:24506ba22480 | 55 | |
wim | 13:24506ba22480 | 56 | _init(); |
wim | 13:24506ba22480 | 57 | |
wim | 13:24506ba22480 | 58 | } |
simon | 1:ac48b187213c | 59 | |
wim | 13:24506ba22480 | 60 | /** Init the LCD controller |
wim | 13:24506ba22480 | 61 | * 4-bit mode, number of lines, no cursor etc |
wim | 13:24506ba22480 | 62 | * Clear display |
wim | 13:24506ba22480 | 63 | */ |
wim | 13:24506ba22480 | 64 | void TextLCD::_init() { |
wim | 13:24506ba22480 | 65 | // _e = 1; |
wim | 13:24506ba22480 | 66 | // _rs = 0; // command mode |
wim | 13:24506ba22480 | 67 | |
wim | 13:24506ba22480 | 68 | _setEnable(true); |
wim | 13:24506ba22480 | 69 | _setRS(false); // command mode |
wim | 13:24506ba22480 | 70 | |
simon | 1:ac48b187213c | 71 | wait(0.015); // Wait 15ms to ensure powered up |
simon | 1:ac48b187213c | 72 | |
simon | 1:ac48b187213c | 73 | // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus) |
simon | 1:ac48b187213c | 74 | for (int i=0; i<3; i++) { |
wim | 13:24506ba22480 | 75 | _writeByte(0x3); |
simon | 1:ac48b187213c | 76 | wait(0.00164); // this command takes 1.64ms, so wait for it |
simon | 1:ac48b187213c | 77 | } |
wim | 13:24506ba22480 | 78 | _writeByte(0x2); // 4-bit mode |
wim | 13:24506ba22480 | 79 | wait(0.000040f); // most instructions take 40us |
simon | 1:ac48b187213c | 80 | |
wim | 10:dd9b3a696acd | 81 | // Display is now in 4-bit mode |
wim | 10:dd9b3a696acd | 82 | switch (_type) { |
wim | 10:dd9b3a696acd | 83 | case LCD8x1: |
wim | 13:24506ba22480 | 84 | _writeCommand(0x20); // Function set 001 BW N F - - |
wim | 13:24506ba22480 | 85 | // N=0 (1 line) |
wim | 13:24506ba22480 | 86 | // F=0 (5x7 dots font) |
wim | 10:dd9b3a696acd | 87 | break; |
wim | 10:dd9b3a696acd | 88 | |
wim | 10:dd9b3a696acd | 89 | case LCD24x4: |
wim | 10:dd9b3a696acd | 90 | // Special mode for KS0078 |
wim | 13:24506ba22480 | 91 | _writeCommand(0x2A); // Function set 001 BW N RE DH REV |
wim | 13:24506ba22480 | 92 | // N=1 (Dont care for KS0078) |
wim | 13:24506ba22480 | 93 | // RE=0 (Extended Regs, special mode for KS0078) |
wim | 13:24506ba22480 | 94 | // DH=1 (Disp shift, special mode for KS0078) |
wim | 13:24506ba22480 | 95 | // REV=0 (Reverse, special mode for KS0078) |
wim | 10:dd9b3a696acd | 96 | |
wim | 13:24506ba22480 | 97 | _writeCommand(0x2E); // Function set 001 BW N RE DH REV |
wim | 13:24506ba22480 | 98 | // N=1 (Dont care for KS0078) |
wim | 13:24506ba22480 | 99 | // RE=1 (Ena Extended Regs, special mode for KS0078) |
wim | 13:24506ba22480 | 100 | // DH=1 (Disp shift, special mode for KS0078) |
wim | 13:24506ba22480 | 101 | // REV=0 (Reverse, special mode for KS0078) |
wim | 10:dd9b3a696acd | 102 | |
wim | 13:24506ba22480 | 103 | _writeCommand(0x09); // Ext Function set 0000 1 FW BW NW |
wim | 13:24506ba22480 | 104 | // FW=0 (5-dot font, special mode for KS0078) |
wim | 13:24506ba22480 | 105 | // BW=0 (Cur BW invert disable, special mode for KS0078) |
wim | 13:24506ba22480 | 106 | // NW=1 (4 Line, special mode for KS0078) |
wim | 10:dd9b3a696acd | 107 | |
wim | 13:24506ba22480 | 108 | _writeCommand(0x2A); // Function set 001 BW N RE DH REV |
wim | 13:24506ba22480 | 109 | // N=1 (Dont care for KS0078) |
wim | 13:24506ba22480 | 110 | // RE=0 (Dis. Extended Regs, special mode for KS0078) |
wim | 13:24506ba22480 | 111 | // DH=1 (Disp shift, special mode for KS0078) |
wim | 13:24506ba22480 | 112 | // REV=0 (Reverse, special mode for KS0078) |
wim | 10:dd9b3a696acd | 113 | break; |
wim | 10:dd9b3a696acd | 114 | |
wim | 10:dd9b3a696acd | 115 | default: |
wim | 13:24506ba22480 | 116 | _writeCommand(0x28); // Function set 001 BW N F - - |
wim | 13:24506ba22480 | 117 | // N=1 (2 lines) |
wim | 13:24506ba22480 | 118 | // F=0 (5x7 dots font) |
wim | 13:24506ba22480 | 119 | // - (Don't care) |
wim | 10:dd9b3a696acd | 120 | |
wim | 10:dd9b3a696acd | 121 | break; |
wim | 10:dd9b3a696acd | 122 | } |
wim | 10:dd9b3a696acd | 123 | |
wim | 13:24506ba22480 | 124 | _writeCommand(0x06); // Entry Mode 0000 01 CD S |
wim | 13:24506ba22480 | 125 | // Cursor Direction and Display Shift |
wim | 13:24506ba22480 | 126 | // CD=1 (Cur incr) |
wim | 13:24506ba22480 | 127 | // S=0 (No display shift) |
wim | 10:dd9b3a696acd | 128 | |
wim | 13:24506ba22480 | 129 | // _writeCommand(0x0C); // Display Ctrl 0000 1 D C B |
wim | 13:24506ba22480 | 130 | // // Display On, Cursor Off, Blink Off |
wim | 13:24506ba22480 | 131 | setCursor(TextLCD::CurOff_BlkOff); |
wim | 11:9ec02df863a1 | 132 | |
wim | 10:dd9b3a696acd | 133 | cls(); |
simon | 1:ac48b187213c | 134 | } |
simon | 1:ac48b187213c | 135 | |
wim | 8:03116f75b66e | 136 | |
wim | 13:24506ba22480 | 137 | void TextLCD::_character(int column, int row, int c) { |
wim | 8:03116f75b66e | 138 | int addr = getAddress(column, row); |
wim | 8:03116f75b66e | 139 | |
wim | 13:24506ba22480 | 140 | _writeCommand(0x80 | addr); |
wim | 13:24506ba22480 | 141 | _writeData(c); |
simon | 1:ac48b187213c | 142 | } |
simon | 1:ac48b187213c | 143 | |
wim | 8:03116f75b66e | 144 | |
simon | 1:ac48b187213c | 145 | void TextLCD::cls() { |
wim | 13:24506ba22480 | 146 | _writeCommand(0x01); // cls, and set cursor to 0 |
wim | 13:24506ba22480 | 147 | wait(0.00164f); // This command takes 1.64 ms |
simon | 1:ac48b187213c | 148 | locate(0, 0); |
simon | 1:ac48b187213c | 149 | } |
simon | 1:ac48b187213c | 150 | |
simon | 1:ac48b187213c | 151 | void TextLCD::locate(int column, int row) { |
simon | 1:ac48b187213c | 152 | _column = column; |
simon | 1:ac48b187213c | 153 | _row = row; |
simon | 1:ac48b187213c | 154 | } |
simon | 1:ac48b187213c | 155 | |
simon | 1:ac48b187213c | 156 | int TextLCD::_putc(int value) { |
simon | 1:ac48b187213c | 157 | if (value == '\n') { |
simon | 1:ac48b187213c | 158 | _column = 0; |
simon | 1:ac48b187213c | 159 | _row++; |
simon | 1:ac48b187213c | 160 | if (_row >= rows()) { |
simon | 1:ac48b187213c | 161 | _row = 0; |
simon | 1:ac48b187213c | 162 | } |
simon | 1:ac48b187213c | 163 | } else { |
wim | 13:24506ba22480 | 164 | _character(_column, _row, value); |
simon | 1:ac48b187213c | 165 | _column++; |
simon | 1:ac48b187213c | 166 | if (_column >= columns()) { |
simon | 1:ac48b187213c | 167 | _column = 0; |
simon | 1:ac48b187213c | 168 | _row++; |
simon | 1:ac48b187213c | 169 | if (_row >= rows()) { |
simon | 1:ac48b187213c | 170 | _row = 0; |
simon | 1:ac48b187213c | 171 | } |
simon | 1:ac48b187213c | 172 | } |
simon | 1:ac48b187213c | 173 | } |
simon | 1:ac48b187213c | 174 | return value; |
simon | 1:ac48b187213c | 175 | } |
simon | 1:ac48b187213c | 176 | |
simon | 1:ac48b187213c | 177 | int TextLCD::_getc() { |
simon | 1:ac48b187213c | 178 | return -1; |
simon | 1:ac48b187213c | 179 | } |
simon | 1:ac48b187213c | 180 | |
wim | 13:24506ba22480 | 181 | |
wim | 13:24506ba22480 | 182 | void TextLCD::_setEnable(bool value) { |
wim | 13:24506ba22480 | 183 | |
wim | 13:24506ba22480 | 184 | switch(_busType) { |
wim | 13:24506ba22480 | 185 | case _PinBus : |
wim | 13:24506ba22480 | 186 | if (value) |
wim | 13:24506ba22480 | 187 | _e = 1; // Set E bit |
wim | 13:24506ba22480 | 188 | else |
wim | 13:24506ba22480 | 189 | _e = 0; // Reset E bit |
wim | 13:24506ba22480 | 190 | |
wim | 13:24506ba22480 | 191 | break; |
wim | 13:24506ba22480 | 192 | |
wim | 13:24506ba22480 | 193 | case _I2CBus : |
wim | 13:24506ba22480 | 194 | if (value) |
wim | 13:24506ba22480 | 195 | _lcd_bus |= D_LCD_E; // Set E bit |
wim | 13:24506ba22480 | 196 | else |
wim | 13:24506ba22480 | 197 | _lcd_bus &= ~D_LCD_E; // Reset E bit |
wim | 13:24506ba22480 | 198 | |
wim | 13:24506ba22480 | 199 | // write the new data to the portexpander |
wim | 13:24506ba22480 | 200 | _i2c->write(_slaveAddress, &_lcd_bus, 1); |
wim | 13:24506ba22480 | 201 | |
wim | 13:24506ba22480 | 202 | break; |
wim | 13:24506ba22480 | 203 | |
wim | 13:24506ba22480 | 204 | case _SPIBus : |
wim | 13:24506ba22480 | 205 | break; |
wim | 13:24506ba22480 | 206 | } |
wim | 13:24506ba22480 | 207 | } |
wim | 13:24506ba22480 | 208 | |
wim | 13:24506ba22480 | 209 | void TextLCD::_setRS(bool value) { |
wim | 13:24506ba22480 | 210 | |
wim | 13:24506ba22480 | 211 | switch(_busType) { |
wim | 13:24506ba22480 | 212 | case _PinBus : |
wim | 13:24506ba22480 | 213 | if (value) |
wim | 13:24506ba22480 | 214 | _rs = 1; // Set RS bit |
wim | 13:24506ba22480 | 215 | else |
wim | 13:24506ba22480 | 216 | _rs = 0; // Reset RS bit |
wim | 13:24506ba22480 | 217 | |
wim | 13:24506ba22480 | 218 | break; |
wim | 13:24506ba22480 | 219 | |
wim | 13:24506ba22480 | 220 | case _I2CBus : |
wim | 13:24506ba22480 | 221 | if (value) |
wim | 13:24506ba22480 | 222 | _lcd_bus |= D_LCD_RS; // Set RS bit |
wim | 13:24506ba22480 | 223 | else |
wim | 13:24506ba22480 | 224 | _lcd_bus &= ~D_LCD_RS; // Reset RS bit |
wim | 13:24506ba22480 | 225 | |
wim | 13:24506ba22480 | 226 | // write the new data to the portexpander |
wim | 13:24506ba22480 | 227 | _i2c->write(_slaveAddress, &_lcd_bus, 1); |
wim | 13:24506ba22480 | 228 | |
wim | 13:24506ba22480 | 229 | break; |
wim | 13:24506ba22480 | 230 | |
wim | 13:24506ba22480 | 231 | case _SPIBus : |
wim | 13:24506ba22480 | 232 | break; |
wim | 13:24506ba22480 | 233 | } |
wim | 13:24506ba22480 | 234 | |
wim | 13:24506ba22480 | 235 | } |
wim | 13:24506ba22480 | 236 | |
wim | 13:24506ba22480 | 237 | void TextLCD::_setData(int value) { |
wim | 13:24506ba22480 | 238 | int data; |
wim | 13:24506ba22480 | 239 | |
wim | 13:24506ba22480 | 240 | switch(_busType) { |
wim | 13:24506ba22480 | 241 | case _PinBus : |
wim | 13:24506ba22480 | 242 | _d = value & 0x0F; // Write Databits |
wim | 13:24506ba22480 | 243 | |
wim | 13:24506ba22480 | 244 | break; |
wim | 13:24506ba22480 | 245 | |
wim | 13:24506ba22480 | 246 | case _I2CBus : |
wim | 13:24506ba22480 | 247 | data = value & 0x0F; |
wim | 13:24506ba22480 | 248 | if (data & 0x01) |
wim | 13:24506ba22480 | 249 | _lcd_bus |= D_LCD_D4; // Set Databit |
wim | 13:24506ba22480 | 250 | else |
wim | 13:24506ba22480 | 251 | _lcd_bus &= ~D_LCD_D4; // Reset Databit |
wim | 13:24506ba22480 | 252 | |
wim | 13:24506ba22480 | 253 | if (data & 0x02) |
wim | 13:24506ba22480 | 254 | _lcd_bus |= D_LCD_D5; // Set Databit |
wim | 13:24506ba22480 | 255 | else |
wim | 13:24506ba22480 | 256 | _lcd_bus &= ~D_LCD_D5; // Reset Databit |
wim | 13:24506ba22480 | 257 | |
wim | 13:24506ba22480 | 258 | if (data & 0x04) |
wim | 13:24506ba22480 | 259 | _lcd_bus |= D_LCD_D6; // Set Databit |
wim | 13:24506ba22480 | 260 | else |
wim | 13:24506ba22480 | 261 | _lcd_bus &= ~D_LCD_D6; // Reset Databit |
wim | 13:24506ba22480 | 262 | |
wim | 13:24506ba22480 | 263 | if (data & 0x08) |
wim | 13:24506ba22480 | 264 | _lcd_bus |= D_LCD_D7; // Set Databit |
wim | 13:24506ba22480 | 265 | else |
wim | 13:24506ba22480 | 266 | _lcd_bus &= ~D_LCD_D7; // Reset Databit |
wim | 13:24506ba22480 | 267 | |
wim | 13:24506ba22480 | 268 | // write the new data to the portexpander |
wim | 13:24506ba22480 | 269 | _i2c->write(_slaveAddress, &_lcd_bus, 1); |
wim | 13:24506ba22480 | 270 | |
wim | 13:24506ba22480 | 271 | break; |
wim | 13:24506ba22480 | 272 | |
wim | 13:24506ba22480 | 273 | case _SPIBus : |
wim | 13:24506ba22480 | 274 | break; |
wim | 13:24506ba22480 | 275 | } |
wim | 13:24506ba22480 | 276 | |
wim | 13:24506ba22480 | 277 | } |
wim | 13:24506ba22480 | 278 | |
wim | 13:24506ba22480 | 279 | |
wim | 13:24506ba22480 | 280 | |
wim | 13:24506ba22480 | 281 | void TextLCD::_writeByte(int value) { |
wim | 13:24506ba22480 | 282 | // _d = value >> 4; |
wim | 13:24506ba22480 | 283 | _setData(value >> 4); |
simon | 1:ac48b187213c | 284 | wait(0.000040f); // most instructions take 40us |
wim | 13:24506ba22480 | 285 | // _e = 0; |
wim | 13:24506ba22480 | 286 | _setEnable(false); |
simon | 1:ac48b187213c | 287 | wait(0.000040f); |
wim | 13:24506ba22480 | 288 | // _e = 1; |
wim | 13:24506ba22480 | 289 | _setEnable(true); |
wim | 13:24506ba22480 | 290 | // _d = value >> 0; |
wim | 13:24506ba22480 | 291 | _setData(value >> 0); |
simon | 1:ac48b187213c | 292 | wait(0.000040f); |
wim | 13:24506ba22480 | 293 | // _e = 0; |
wim | 13:24506ba22480 | 294 | _setEnable(false); |
simon | 1:ac48b187213c | 295 | wait(0.000040f); // most instructions take 40us |
wim | 13:24506ba22480 | 296 | // _e = 1; |
wim | 13:24506ba22480 | 297 | _setEnable(true); |
simon | 1:ac48b187213c | 298 | } |
simon | 1:ac48b187213c | 299 | |
wim | 13:24506ba22480 | 300 | void TextLCD::_writeCommand(int command) { |
wim | 13:24506ba22480 | 301 | // _rs = 0; |
wim | 13:24506ba22480 | 302 | _setRS(false); |
wim | 13:24506ba22480 | 303 | _writeByte(command); |
simon | 1:ac48b187213c | 304 | } |
simon | 1:ac48b187213c | 305 | |
wim | 13:24506ba22480 | 306 | void TextLCD::_writeData(int data) { |
wim | 13:24506ba22480 | 307 | // _rs = 1; |
wim | 13:24506ba22480 | 308 | _setRS(true); |
wim | 13:24506ba22480 | 309 | _writeByte(data); |
simon | 1:ac48b187213c | 310 | } |
simon | 1:ac48b187213c | 311 | |
wim | 8:03116f75b66e | 312 | |
wim | 8:03116f75b66e | 313 | #if (0) |
wim | 8:03116f75b66e | 314 | // This is the original method. |
wim | 8:03116f75b66e | 315 | // It is confusing since it returns the memoryaddress or-ed with the set memorycommand 0x80. |
wim | 8:03116f75b66e | 316 | // Left it in here for compatibility with older code. New applications should use getAddress() instead. |
wim | 8:03116f75b66e | 317 | // |
wim | 13:24506ba22480 | 318 | int TextLCD::_address(int column, int row) { |
simon | 1:ac48b187213c | 319 | switch (_type) { |
simon | 1:ac48b187213c | 320 | case LCD20x4: |
simon | 1:ac48b187213c | 321 | switch (row) { |
simon | 1:ac48b187213c | 322 | case 0: |
simon | 1:ac48b187213c | 323 | return 0x80 + column; |
simon | 1:ac48b187213c | 324 | case 1: |
simon | 1:ac48b187213c | 325 | return 0xc0 + column; |
simon | 1:ac48b187213c | 326 | case 2: |
simon | 1:ac48b187213c | 327 | return 0x94 + column; |
simon | 1:ac48b187213c | 328 | case 3: |
simon | 1:ac48b187213c | 329 | return 0xd4 + column; |
simon | 1:ac48b187213c | 330 | } |
simon | 1:ac48b187213c | 331 | case LCD16x2B: |
simon | 4:bf5b706f8d32 | 332 | return 0x80 + (row * 40) + column; |
simon | 1:ac48b187213c | 333 | case LCD16x2: |
simon | 1:ac48b187213c | 334 | case LCD20x2: |
simon | 1:ac48b187213c | 335 | default: |
simon | 4:bf5b706f8d32 | 336 | return 0x80 + (row * 0x40) + column; |
simon | 1:ac48b187213c | 337 | } |
simon | 1:ac48b187213c | 338 | } |
wim | 8:03116f75b66e | 339 | #endif |
wim | 8:03116f75b66e | 340 | |
wim | 8:03116f75b66e | 341 | |
wim | 8:03116f75b66e | 342 | // This replaces the original method. |
wim | 8:03116f75b66e | 343 | // Left it in here for compatibility with older code. New applications should use getAddress() instead. |
wim | 13:24506ba22480 | 344 | int TextLCD::_address(int column, int row) { |
wim | 8:03116f75b66e | 345 | return 0x80 | getAddress(column, row); |
wim | 8:03116f75b66e | 346 | } |
wim | 8:03116f75b66e | 347 | |
wim | 8:03116f75b66e | 348 | // This is new method to return the memory address based on row, column and displaytype. |
wim | 8:03116f75b66e | 349 | // |
wim | 8:03116f75b66e | 350 | int TextLCD::getAddress(int column, int row) { |
wim | 8:03116f75b66e | 351 | |
wim | 8:03116f75b66e | 352 | switch (_type) { |
wim | 8:03116f75b66e | 353 | case LCD8x1: |
wim | 8:03116f75b66e | 354 | return 0x00 + column; |
wim | 8:03116f75b66e | 355 | |
wim | 13:24506ba22480 | 356 | case LCD16x1: |
wim | 13:24506ba22480 | 357 | // LCD16x1 is a special layout of LCD8x2 |
wim | 13:24506ba22480 | 358 | if (column<8) |
wim | 13:24506ba22480 | 359 | return 0x00 + column; |
wim | 13:24506ba22480 | 360 | else |
wim | 13:24506ba22480 | 361 | return 0x40 + (column - 8); |
wim | 13:24506ba22480 | 362 | |
wim | 8:03116f75b66e | 363 | case LCD16x4: |
wim | 8:03116f75b66e | 364 | switch (row) { |
wim | 8:03116f75b66e | 365 | case 0: |
wim | 8:03116f75b66e | 366 | return 0x00 + column; |
wim | 8:03116f75b66e | 367 | case 1: |
wim | 8:03116f75b66e | 368 | return 0x40 + column; |
wim | 8:03116f75b66e | 369 | case 2: |
wim | 8:03116f75b66e | 370 | return 0x10 + column; |
wim | 8:03116f75b66e | 371 | case 3: |
wim | 8:03116f75b66e | 372 | return 0x50 + column; |
wim | 8:03116f75b66e | 373 | } |
wim | 8:03116f75b66e | 374 | |
wim | 8:03116f75b66e | 375 | case LCD20x4: |
wim | 8:03116f75b66e | 376 | switch (row) { |
wim | 8:03116f75b66e | 377 | case 0: |
wim | 8:03116f75b66e | 378 | return 0x00 + column; |
wim | 8:03116f75b66e | 379 | case 1: |
wim | 8:03116f75b66e | 380 | return 0x40 + column; |
wim | 8:03116f75b66e | 381 | case 2: |
wim | 8:03116f75b66e | 382 | return 0x14 + column; |
wim | 8:03116f75b66e | 383 | case 3: |
wim | 8:03116f75b66e | 384 | return 0x54 + column; |
wim | 8:03116f75b66e | 385 | } |
wim | 8:03116f75b66e | 386 | |
wim | 10:dd9b3a696acd | 387 | // Special mode for KS0078 |
wim | 10:dd9b3a696acd | 388 | case LCD24x4: |
wim | 10:dd9b3a696acd | 389 | switch (row) { |
wim | 10:dd9b3a696acd | 390 | case 0: |
wim | 10:dd9b3a696acd | 391 | return 0x00 + column; |
wim | 10:dd9b3a696acd | 392 | case 1: |
wim | 10:dd9b3a696acd | 393 | return 0x20 + column; |
wim | 10:dd9b3a696acd | 394 | case 2: |
wim | 10:dd9b3a696acd | 395 | return 0x40 + column; |
wim | 10:dd9b3a696acd | 396 | case 3: |
wim | 10:dd9b3a696acd | 397 | return 0x60 + column; |
wim | 10:dd9b3a696acd | 398 | } |
wim | 10:dd9b3a696acd | 399 | |
wim | 8:03116f75b66e | 400 | // Not sure about this one, seems wrong. |
wim | 8:03116f75b66e | 401 | case LCD16x2B: |
wim | 8:03116f75b66e | 402 | return 0x00 + (row * 40) + column; |
wim | 8:03116f75b66e | 403 | |
wim | 8:03116f75b66e | 404 | case LCD8x2: |
wim | 8:03116f75b66e | 405 | case LCD16x2: |
wim | 8:03116f75b66e | 406 | case LCD20x2: |
wim | 8:03116f75b66e | 407 | case LCD24x2: |
wim | 9:0893d986e717 | 408 | case LCD40x2: |
wim | 8:03116f75b66e | 409 | return 0x00 + (row * 0x40) + column; |
wim | 8:03116f75b66e | 410 | |
wim | 8:03116f75b66e | 411 | // Should never get here. |
wim | 8:03116f75b66e | 412 | default: |
wim | 8:03116f75b66e | 413 | return 0x00; |
wim | 8:03116f75b66e | 414 | } |
wim | 8:03116f75b66e | 415 | } |
wim | 8:03116f75b66e | 416 | |
wim | 8:03116f75b66e | 417 | |
wim | 13:24506ba22480 | 418 | // Added for consistency. Set row, column and update memoryaddress. |
wim | 8:03116f75b66e | 419 | // |
wim | 8:03116f75b66e | 420 | void TextLCD::setAddress(int column, int row) { |
wim | 8:03116f75b66e | 421 | |
wim | 8:03116f75b66e | 422 | locate(column, row); |
wim | 8:03116f75b66e | 423 | |
wim | 8:03116f75b66e | 424 | int addr = getAddress(column, row); |
wim | 8:03116f75b66e | 425 | |
wim | 13:24506ba22480 | 426 | _writeCommand(0x80 | addr); |
wim | 8:03116f75b66e | 427 | } |
simon | 1:ac48b187213c | 428 | |
simon | 1:ac48b187213c | 429 | int TextLCD::columns() { |
simon | 1:ac48b187213c | 430 | switch (_type) { |
wim | 8:03116f75b66e | 431 | case LCD8x1: |
wim | 8:03116f75b66e | 432 | case LCD8x2: |
wim | 8:03116f75b66e | 433 | return 8; |
wim | 8:03116f75b66e | 434 | |
wim | 13:24506ba22480 | 435 | case LCD16x1: |
simon | 1:ac48b187213c | 436 | case LCD16x2: |
simon | 1:ac48b187213c | 437 | case LCD16x2B: |
wim | 8:03116f75b66e | 438 | case LCD16x4: |
wim | 8:03116f75b66e | 439 | return 16; |
wim | 8:03116f75b66e | 440 | |
wim | 8:03116f75b66e | 441 | case LCD20x2: |
wim | 8:03116f75b66e | 442 | case LCD20x4: |
wim | 8:03116f75b66e | 443 | return 20; |
wim | 8:03116f75b66e | 444 | |
wim | 8:03116f75b66e | 445 | case LCD24x2: |
wim | 10:dd9b3a696acd | 446 | case LCD24x4: |
wim | 8:03116f75b66e | 447 | return 24; |
wim | 9:0893d986e717 | 448 | |
wim | 9:0893d986e717 | 449 | case LCD40x2: |
wim | 9:0893d986e717 | 450 | return 40; |
wim | 8:03116f75b66e | 451 | |
wim | 8:03116f75b66e | 452 | // Should never get here. |
simon | 1:ac48b187213c | 453 | default: |
wim | 8:03116f75b66e | 454 | return 0; |
simon | 1:ac48b187213c | 455 | } |
simon | 1:ac48b187213c | 456 | } |
simon | 1:ac48b187213c | 457 | |
simon | 1:ac48b187213c | 458 | int TextLCD::rows() { |
simon | 1:ac48b187213c | 459 | switch (_type) { |
wim | 8:03116f75b66e | 460 | case LCD8x1: |
wim | 13:24506ba22480 | 461 | case LCD16x1: |
wim | 8:03116f75b66e | 462 | return 1; |
wim | 8:03116f75b66e | 463 | |
wim | 8:03116f75b66e | 464 | case LCD8x2: |
simon | 1:ac48b187213c | 465 | case LCD16x2: |
simon | 1:ac48b187213c | 466 | case LCD16x2B: |
simon | 1:ac48b187213c | 467 | case LCD20x2: |
wim | 8:03116f75b66e | 468 | case LCD24x2: |
wim | 9:0893d986e717 | 469 | case LCD40x2: |
wim | 8:03116f75b66e | 470 | return 2; |
wim | 8:03116f75b66e | 471 | |
wim | 8:03116f75b66e | 472 | case LCD16x4: |
wim | 8:03116f75b66e | 473 | case LCD20x4: |
wim | 10:dd9b3a696acd | 474 | case LCD24x4: |
wim | 8:03116f75b66e | 475 | return 4; |
wim | 12:6bf9d9957d31 | 476 | |
wim | 12:6bf9d9957d31 | 477 | // Should never get here. |
simon | 1:ac48b187213c | 478 | default: |
wim | 8:03116f75b66e | 479 | return 0; |
simon | 1:ac48b187213c | 480 | } |
simon | 1:ac48b187213c | 481 | } |
wim | 10:dd9b3a696acd | 482 | |
wim | 10:dd9b3a696acd | 483 | |
wim | 13:24506ba22480 | 484 | void TextLCD::setCursor(TextLCD::LCDCursor show) { |
wim | 10:dd9b3a696acd | 485 | |
wim | 10:dd9b3a696acd | 486 | switch (show) { |
wim | 13:24506ba22480 | 487 | case CurOff_BlkOff : _writeCommand(0x0C); // Cursor off and Blink Off |
wim | 11:9ec02df863a1 | 488 | wait_us(40); |
wim | 11:9ec02df863a1 | 489 | _cursor = show; |
wim | 11:9ec02df863a1 | 490 | break; |
wim | 11:9ec02df863a1 | 491 | |
wim | 13:24506ba22480 | 492 | case CurOn_BlkOff : _writeCommand(0x0E); // Cursor on and Blink Off |
wim | 11:9ec02df863a1 | 493 | wait_us(40); |
wim | 11:9ec02df863a1 | 494 | _cursor = show; |
wim | 11:9ec02df863a1 | 495 | break; |
wim | 11:9ec02df863a1 | 496 | |
wim | 13:24506ba22480 | 497 | case CurOff_BlkOn : _writeCommand(0x0D); // Cursor off and Blink On |
wim | 11:9ec02df863a1 | 498 | wait_us(40); |
wim | 11:9ec02df863a1 | 499 | _cursor = show; |
wim | 11:9ec02df863a1 | 500 | break; |
wim | 11:9ec02df863a1 | 501 | |
wim | 13:24506ba22480 | 502 | case CurOn_BlkOn : _writeCommand(0x0F); // Cursor on and Blink char |
wim | 11:9ec02df863a1 | 503 | wait_us(40); |
wim | 11:9ec02df863a1 | 504 | _cursor = show; |
wim | 11:9ec02df863a1 | 505 | break; |
wim | 11:9ec02df863a1 | 506 | |
wim | 12:6bf9d9957d31 | 507 | // Should never get here. |
wim | 10:dd9b3a696acd | 508 | default : |
wim | 11:9ec02df863a1 | 509 | break; |
wim | 10:dd9b3a696acd | 510 | |
wim | 10:dd9b3a696acd | 511 | } |
wim | 11:9ec02df863a1 | 512 | |
wim | 10:dd9b3a696acd | 513 | } |
wim | 10:dd9b3a696acd | 514 | |
wim | 10:dd9b3a696acd | 515 | |
wim | 11:9ec02df863a1 | 516 | void TextLCD::setUDC(unsigned char c, char *udc_data) { |
wim | 13:24506ba22480 | 517 | _writeCommand(0x40 + ((c & 0x07) << 3)); //Set CG-RAM address |
wim | 11:9ec02df863a1 | 518 | |
wim | 11:9ec02df863a1 | 519 | for (int i=0; i<8; i++) { |
wim | 13:24506ba22480 | 520 | _writeData(*udc_data++); |
wim | 11:9ec02df863a1 | 521 | } |
wim | 11:9ec02df863a1 | 522 | } |
wim | 10:dd9b3a696acd | 523 | |
wim | 10:dd9b3a696acd | 524 |