Khayhen Sarveswarah
Change config file suit LCD used
Fork of
TextLCD
by 
Wim Huiskamp
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?
| 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 | 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 | } |