for
Dependents: LV_FGSE_Controller_Interface
TextLCD.cpp@18:bd65dc10f27f, 2013-03-09 (annotated)
- Committer:
- wim
- Date:
- Sat Mar 09 19:39:53 2013 +0000
- Revision:
- 18:bd65dc10f27f
- Parent:
- 17:652ab113bc2e
- Child:
- 19:c747b9e2e7b8
Added some UDCs, Updated documentation.
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 |
wim | 18:bd65dc10f27f | 6 | * 2013, v04: WH, Added support for Display On/Off, improved 4bit bootprocess |
wim | 18:bd65dc10f27f | 7 | * 2013, v05: WH, Added support for 8x2B, added some UDCs |
simon | 1:ac48b187213c | 8 | * |
simon | 1:ac48b187213c | 9 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
simon | 1:ac48b187213c | 10 | * of this software and associated documentation files (the "Software"), to deal |
simon | 1:ac48b187213c | 11 | * in the Software without restriction, including without limitation the rights |
simon | 1:ac48b187213c | 12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
simon | 1:ac48b187213c | 13 | * copies of the Software, and to permit persons to whom the Software is |
simon | 1:ac48b187213c | 14 | * furnished to do so, subject to the following conditions: |
simon | 1:ac48b187213c | 15 | * |
simon | 1:ac48b187213c | 16 | * The above copyright notice and this permission notice shall be included in |
simon | 1:ac48b187213c | 17 | * all copies or substantial portions of the Software. |
simon | 1:ac48b187213c | 18 | * |
simon | 1:ac48b187213c | 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
simon | 1:ac48b187213c | 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
simon | 1:ac48b187213c | 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
simon | 1:ac48b187213c | 22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
simon | 1:ac48b187213c | 23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
simon | 1:ac48b187213c | 24 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
simon | 1:ac48b187213c | 25 | * THE SOFTWARE. |
simon | 1:ac48b187213c | 26 | */ |
simon | 1:ac48b187213c | 27 | |
simon | 1:ac48b187213c | 28 | #include "TextLCD.h" |
simon | 1:ac48b187213c | 29 | #include "mbed.h" |
simon | 1:ac48b187213c | 30 | |
wim | 15:b70ebfffb258 | 31 | |
wim | 15:b70ebfffb258 | 32 | /* Create a TextLCD interface for using regular mbed pins |
wim | 15:b70ebfffb258 | 33 | * |
wim | 15:b70ebfffb258 | 34 | * @param rs Instruction/data control line |
wim | 15:b70ebfffb258 | 35 | * @param e Enable line (clock) |
wim | 15:b70ebfffb258 | 36 | * @param d4-d7 Data lines for using as a 4-bit interface |
wim | 15:b70ebfffb258 | 37 | * @param type Sets the panel size/addressing mode (default = LCD16x2) |
wim | 15:b70ebfffb258 | 38 | * @param e2 Enable2 line (clock for second controller, LCD40x4 only) |
wim | 15:b70ebfffb258 | 39 | */ |
wim | 13:24506ba22480 | 40 | TextLCD::TextLCD(PinName rs, PinName e, |
wim | 13:24506ba22480 | 41 | PinName d4, PinName d5, PinName d6, PinName d7, |
wim | 15:b70ebfffb258 | 42 | LCDType type, PinName e2) : _rs(rs), _e(e), _e2(e2), |
wim | 15:b70ebfffb258 | 43 | _d(d4, d5, d6, d7), |
wim | 15:b70ebfffb258 | 44 | _cs(NC), |
wim | 15:b70ebfffb258 | 45 | _type(type) { |
wim | 13:24506ba22480 | 46 | |
wim | 13:24506ba22480 | 47 | _busType = _PinBus; |
wim | 13:24506ba22480 | 48 | |
wim | 13:24506ba22480 | 49 | _init(); |
wim | 13:24506ba22480 | 50 | |
wim | 13:24506ba22480 | 51 | } |
wim | 13:24506ba22480 | 52 | |
wim | 15:b70ebfffb258 | 53 | /* Create a TextLCD interface using an I2C PC8574 portexpander |
wim | 15:b70ebfffb258 | 54 | * |
wim | 15:b70ebfffb258 | 55 | * @param i2c I2C Bus |
wim | 15:b70ebfffb258 | 56 | * @param deviceAddress I2C slave address (PCF8574) |
wim | 15:b70ebfffb258 | 57 | * @param type Sets the panel size/addressing mode (default = LCD16x2) |
wim | 15:b70ebfffb258 | 58 | */ |
wim | 13:24506ba22480 | 59 | TextLCD::TextLCD(I2C *i2c, char deviceAddress, LCDType type) : |
wim | 15:b70ebfffb258 | 60 | _rs(NC), _e(NC), _e2(NC), |
wim | 15:b70ebfffb258 | 61 | _d(NC), |
wim | 15:b70ebfffb258 | 62 | _i2c(i2c), |
wim | 15:b70ebfffb258 | 63 | _cs(NC), |
simon | 1:ac48b187213c | 64 | _type(type) { |
wim | 15:b70ebfffb258 | 65 | |
wim | 13:24506ba22480 | 66 | _slaveAddress = deviceAddress; |
wim | 13:24506ba22480 | 67 | _busType = _I2CBus; |
simon | 1:ac48b187213c | 68 | |
wim | 13:24506ba22480 | 69 | |
wim | 13:24506ba22480 | 70 | // Init the portexpander bus |
wim | 15:b70ebfffb258 | 71 | _lcd_bus = D_LCD_BUS_DEF; |
wim | 13:24506ba22480 | 72 | |
wim | 13:24506ba22480 | 73 | // write the new data to the portexpander |
wim | 13:24506ba22480 | 74 | _i2c->write(_slaveAddress, &_lcd_bus, 1); |
wim | 13:24506ba22480 | 75 | |
wim | 13:24506ba22480 | 76 | _init(); |
wim | 13:24506ba22480 | 77 | |
wim | 13:24506ba22480 | 78 | } |
simon | 1:ac48b187213c | 79 | |
wim | 15:b70ebfffb258 | 80 | /* Create a TextLCD interface using an SPI 74595 portexpander |
wim | 15:b70ebfffb258 | 81 | * |
wim | 15:b70ebfffb258 | 82 | * @param spi SPI Bus |
wim | 15:b70ebfffb258 | 83 | * @param cs chip select pin (active low) |
wim | 15:b70ebfffb258 | 84 | * @param type Sets the panel size/addressing mode (default = LCD16x2) |
wim | 15:b70ebfffb258 | 85 | */ |
wim | 14:0c32b66b14b8 | 86 | TextLCD::TextLCD(SPI *spi, PinName cs, LCDType type) : |
wim | 15:b70ebfffb258 | 87 | _rs(NC), _e(NC), _e2(NC), |
wim | 15:b70ebfffb258 | 88 | _d(NC), |
wim | 15:b70ebfffb258 | 89 | _spi(spi), |
wim | 15:b70ebfffb258 | 90 | _cs(cs), |
wim | 14:0c32b66b14b8 | 91 | _type(type) { |
wim | 14:0c32b66b14b8 | 92 | |
wim | 14:0c32b66b14b8 | 93 | _busType = _SPIBus; |
wim | 14:0c32b66b14b8 | 94 | |
wim | 14:0c32b66b14b8 | 95 | // Setup the spi for 8 bit data, low steady state clock, |
wim | 14:0c32b66b14b8 | 96 | // rising edge capture, with a 500KHz or 1MHz clock rate |
wim | 14:0c32b66b14b8 | 97 | _spi->format(8,0); |
wim | 14:0c32b66b14b8 | 98 | _spi->frequency(500000); |
wim | 14:0c32b66b14b8 | 99 | //_spi.frequency(1000000); |
wim | 14:0c32b66b14b8 | 100 | |
wim | 14:0c32b66b14b8 | 101 | |
wim | 14:0c32b66b14b8 | 102 | // Init the portexpander bus |
wim | 15:b70ebfffb258 | 103 | _lcd_bus = D_LCD_BUS_DEF; |
wim | 14:0c32b66b14b8 | 104 | |
wim | 14:0c32b66b14b8 | 105 | // write the new data to the portexpander |
wim | 14:0c32b66b14b8 | 106 | _setCS(false); |
wim | 14:0c32b66b14b8 | 107 | _spi->write(_lcd_bus); |
wim | 14:0c32b66b14b8 | 108 | _setCS(true); |
wim | 14:0c32b66b14b8 | 109 | |
wim | 14:0c32b66b14b8 | 110 | _init(); |
wim | 14:0c32b66b14b8 | 111 | |
wim | 14:0c32b66b14b8 | 112 | } |
wim | 14:0c32b66b14b8 | 113 | |
wim | 14:0c32b66b14b8 | 114 | |
wim | 15:b70ebfffb258 | 115 | /* Init the LCD Controller(s) |
wim | 13:24506ba22480 | 116 | * Clear display |
wim | 13:24506ba22480 | 117 | */ |
wim | 13:24506ba22480 | 118 | void TextLCD::_init() { |
wim | 15:b70ebfffb258 | 119 | |
wim | 15:b70ebfffb258 | 120 | // Select and configure second LCD controller when needed |
wim | 15:b70ebfffb258 | 121 | if(_type==LCD40x4) { |
wim | 15:b70ebfffb258 | 122 | _ctrl=TextLCD::_LCDCtrl_1; // Select 2nd controller |
wim | 15:b70ebfffb258 | 123 | |
wim | 15:b70ebfffb258 | 124 | _initCtrl(); // Init 2nd controller |
wim | 15:b70ebfffb258 | 125 | |
wim | 15:b70ebfffb258 | 126 | // Secondary LCD controller Clearscreen |
wim | 15:b70ebfffb258 | 127 | _writeCommand(0x01); // cls, and set cursor to 0 |
wim | 15:b70ebfffb258 | 128 | wait_ms(10); // The CLS command takes 1.64 ms. |
wim | 15:b70ebfffb258 | 129 | // Since we are not using the Busy flag, Lets be safe and take 10 ms |
wim | 15:b70ebfffb258 | 130 | |
wim | 15:b70ebfffb258 | 131 | } |
wim | 15:b70ebfffb258 | 132 | |
wim | 15:b70ebfffb258 | 133 | // Select and configure primary LCD controller |
wim | 15:b70ebfffb258 | 134 | _ctrl=TextLCD::_LCDCtrl_0; // Select primary controller |
wim | 13:24506ba22480 | 135 | |
wim | 15:b70ebfffb258 | 136 | _initCtrl(); // Init primary controller |
wim | 15:b70ebfffb258 | 137 | |
wim | 15:b70ebfffb258 | 138 | // Primary LCD controller Clearscreen |
wim | 15:b70ebfffb258 | 139 | _writeCommand(0x01); // cls, and set cursor to 0 |
wim | 15:b70ebfffb258 | 140 | |
wim | 15:b70ebfffb258 | 141 | wait_ms(10); // The CLS command takes 1.64 ms. |
wim | 15:b70ebfffb258 | 142 | // Since we are not using the Busy flag, Lets be safe and take 10 ms |
wim | 15:b70ebfffb258 | 143 | |
wim | 15:b70ebfffb258 | 144 | } |
wim | 15:b70ebfffb258 | 145 | |
wim | 15:b70ebfffb258 | 146 | /* Init the LCD controller |
wim | 15:b70ebfffb258 | 147 | * 4-bit mode, number of lines, fonttype, no cursor etc |
wim | 15:b70ebfffb258 | 148 | * |
wim | 15:b70ebfffb258 | 149 | */ |
wim | 15:b70ebfffb258 | 150 | void TextLCD::_initCtrl() { |
wim | 15:b70ebfffb258 | 151 | |
wim | 13:24506ba22480 | 152 | _setRS(false); // command mode |
wim | 13:24506ba22480 | 153 | |
wim | 15:b70ebfffb258 | 154 | wait_ms(20); // Wait 20ms to ensure powered up |
simon | 1:ac48b187213c | 155 | |
wim | 17:652ab113bc2e | 156 | #if(1) |
wim | 17:652ab113bc2e | 157 | // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus) |
wim | 17:652ab113bc2e | 158 | for (int i=0; i<3; i++) { |
wim | 17:652ab113bc2e | 159 | _writeNibble(0x3); |
wim | 17:652ab113bc2e | 160 | wait_ms(15); // this command takes 1.64ms, so wait for it |
wim | 17:652ab113bc2e | 161 | } |
wim | 17:652ab113bc2e | 162 | _writeNibble(0x2); // 4-bit mode |
wim | 17:652ab113bc2e | 163 | wait_us(40); // most instructions take 40us |
wim | 17:652ab113bc2e | 164 | #else |
wim | 17:652ab113bc2e | 165 | //Original code. Does not comply with specification and causes problems |
wim | 17:652ab113bc2e | 166 | //unless used right after power-on. |
wim | 17:652ab113bc2e | 167 | |
simon | 1:ac48b187213c | 168 | // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus) |
simon | 1:ac48b187213c | 169 | for (int i=0; i<3; i++) { |
wim | 13:24506ba22480 | 170 | _writeByte(0x3); |
wim | 15:b70ebfffb258 | 171 | wait_ms(15); // this command takes 1.64ms, so wait for it |
simon | 1:ac48b187213c | 172 | } |
wim | 13:24506ba22480 | 173 | _writeByte(0x2); // 4-bit mode |
wim | 14:0c32b66b14b8 | 174 | wait_us(40); // most instructions take 40us |
wim | 17:652ab113bc2e | 175 | #endif |
wim | 18:bd65dc10f27f | 176 | |
wim | 18:bd65dc10f27f | 177 | // Display is now in 4-bit mode |
wim | 18:bd65dc10f27f | 178 | |
wim | 18:bd65dc10f27f | 179 | #if(0) |
wim | 18:bd65dc10f27f | 180 | // ST7036 controller: Initialise Voltage booster for VLCD. VDD=5V |
wim | 18:bd65dc10f27f | 181 | // Note: supports 1,2 or 3 lines |
wim | 18:bd65dc10f27f | 182 | _writeByte( 0x29 ); // 4-bit Databus, 2 Lines, Select Instruction table 1 |
wim | 18:bd65dc10f27f | 183 | wait_us(27); // > 26,3ms |
wim | 18:bd65dc10f27f | 184 | _writeByte( 0x14 ); // Bias: 1/5, 2-Lines LCD |
wim | 18:bd65dc10f27f | 185 | wait_us(30); // > 26,3ms |
wim | 18:bd65dc10f27f | 186 | _writeByte( 0x55 ); // Icon off, Booster on, Set Contrast C5, C4 |
wim | 18:bd65dc10f27f | 187 | wait_us(30); // > 26,3ms |
wim | 18:bd65dc10f27f | 188 | _writeByte( 0x6d ); // Voltagefollower On, Ampl ratio Rab2, Rab1, Rab0 |
wim | 18:bd65dc10f27f | 189 | wait_ms(200); // > 200ms! |
wim | 18:bd65dc10f27f | 190 | _writeByte( 0x78 ); // Set Contrast C3, C2, C1, C0 |
wim | 18:bd65dc10f27f | 191 | wait_us(30); // > 26,3ms |
wim | 18:bd65dc10f27f | 192 | _writeByte( 0x28 ); // Return to Instruction table 0 |
wim | 18:bd65dc10f27f | 193 | wait_ms(50); |
wim | 18:bd65dc10f27f | 194 | #endif |
wim | 14:0c32b66b14b8 | 195 | |
wim | 18:bd65dc10f27f | 196 | // Initialise Display configuration |
wim | 10:dd9b3a696acd | 197 | switch (_type) { |
wim | 10:dd9b3a696acd | 198 | case LCD8x1: |
wim | 18:bd65dc10f27f | 199 | case LCD8x2B: |
wim | 18:bd65dc10f27f | 200 | //8x1 is a regular 1 line display |
wim | 18:bd65dc10f27f | 201 | //8x2B is a special case of 16x1 |
wim | 15:b70ebfffb258 | 202 | _writeCommand(0x20); // Function set 001 DL N F - - |
wim | 15:b70ebfffb258 | 203 | // DL=0 (4 bits bus) |
wim | 13:24506ba22480 | 204 | // N=0 (1 line) |
wim | 13:24506ba22480 | 205 | // F=0 (5x7 dots font) |
wim | 10:dd9b3a696acd | 206 | break; |
wim | 10:dd9b3a696acd | 207 | |
wim | 10:dd9b3a696acd | 208 | case LCD24x4: |
wim | 10:dd9b3a696acd | 209 | // Special mode for KS0078 |
wim | 15:b70ebfffb258 | 210 | _writeCommand(0x2A); // Function set 001 DL N RE DH REV |
wim | 15:b70ebfffb258 | 211 | // DL=0 (4 bits bus) |
wim | 13:24506ba22480 | 212 | // N=1 (Dont care for KS0078) |
wim | 13:24506ba22480 | 213 | // RE=0 (Extended Regs, special mode for KS0078) |
wim | 13:24506ba22480 | 214 | // DH=1 (Disp shift, special mode for KS0078) |
wim | 13:24506ba22480 | 215 | // REV=0 (Reverse, special mode for KS0078) |
wim | 10:dd9b3a696acd | 216 | |
wim | 15:b70ebfffb258 | 217 | _writeCommand(0x2E); // Function set 001 DL N RE DH REV |
wim | 15:b70ebfffb258 | 218 | // DL=0 (4 bits bus) |
wim | 13:24506ba22480 | 219 | // N=1 (Dont care for KS0078) |
wim | 13:24506ba22480 | 220 | // RE=1 (Ena Extended Regs, special mode for KS0078) |
wim | 13:24506ba22480 | 221 | // DH=1 (Disp shift, special mode for KS0078) |
wim | 13:24506ba22480 | 222 | // REV=0 (Reverse, special mode for KS0078) |
wim | 10:dd9b3a696acd | 223 | |
wim | 13:24506ba22480 | 224 | _writeCommand(0x09); // Ext Function set 0000 1 FW BW NW |
wim | 13:24506ba22480 | 225 | // FW=0 (5-dot font, special mode for KS0078) |
wim | 13:24506ba22480 | 226 | // BW=0 (Cur BW invert disable, special mode for KS0078) |
wim | 13:24506ba22480 | 227 | // NW=1 (4 Line, special mode for KS0078) |
wim | 10:dd9b3a696acd | 228 | |
wim | 15:b70ebfffb258 | 229 | _writeCommand(0x2A); // Function set 001 DL N RE DH REV |
wim | 15:b70ebfffb258 | 230 | // DL=0 (4 bits bus) |
wim | 13:24506ba22480 | 231 | // N=1 (Dont care for KS0078) |
wim | 13:24506ba22480 | 232 | // RE=0 (Dis. Extended Regs, special mode for KS0078) |
wim | 13:24506ba22480 | 233 | // DH=1 (Disp shift, special mode for KS0078) |
wim | 13:24506ba22480 | 234 | // REV=0 (Reverse, special mode for KS0078) |
wim | 10:dd9b3a696acd | 235 | break; |
wim | 10:dd9b3a696acd | 236 | |
wim | 15:b70ebfffb258 | 237 | // All other LCD types are initialised as 2 Line displays (including LCD40x4) |
wim | 10:dd9b3a696acd | 238 | default: |
wim | 15:b70ebfffb258 | 239 | _writeCommand(0x28); // Function set 001 DL N F - - |
wim | 15:b70ebfffb258 | 240 | // DL=0 (4 bits bus) |
wim | 13:24506ba22480 | 241 | // N=1 (2 lines) |
wim | 15:b70ebfffb258 | 242 | // F=0 (5x7 dots font, only option for 2 line display) |
wim | 13:24506ba22480 | 243 | // - (Don't care) |
wim | 10:dd9b3a696acd | 244 | |
wim | 10:dd9b3a696acd | 245 | break; |
wim | 10:dd9b3a696acd | 246 | } |
wim | 10:dd9b3a696acd | 247 | |
wim | 13:24506ba22480 | 248 | _writeCommand(0x06); // Entry Mode 0000 01 CD S |
wim | 13:24506ba22480 | 249 | // Cursor Direction and Display Shift |
wim | 13:24506ba22480 | 250 | // CD=1 (Cur incr) |
wim | 13:24506ba22480 | 251 | // S=0 (No display shift) |
wim | 10:dd9b3a696acd | 252 | |
wim | 13:24506ba22480 | 253 | // _writeCommand(0x0C); // Display Ctrl 0000 1 D C B |
wim | 17:652ab113bc2e | 254 | // // Display On, Cursor Off, Blink Off |
wim | 15:b70ebfffb258 | 255 | setCursor(TextLCD::CurOff_BlkOff); |
wim | 17:652ab113bc2e | 256 | setMode(TextLCD::DispOn); |
simon | 1:ac48b187213c | 257 | } |
simon | 1:ac48b187213c | 258 | |
wim | 8:03116f75b66e | 259 | |
wim | 16:c276b75e6585 | 260 | // Clear the screen, Cursor home. |
wim | 15:b70ebfffb258 | 261 | void TextLCD::cls() { |
wim | 15:b70ebfffb258 | 262 | |
wim | 15:b70ebfffb258 | 263 | // Select and configure second LCD controller when needed |
wim | 15:b70ebfffb258 | 264 | if(_type==LCD40x4) { |
wim | 15:b70ebfffb258 | 265 | _ctrl=TextLCD::_LCDCtrl_1; // Select 2nd controller |
wim | 15:b70ebfffb258 | 266 | |
wim | 15:b70ebfffb258 | 267 | // Second LCD controller Cursor always Off |
wim | 17:652ab113bc2e | 268 | _setCursorAndDisplayMode(_currentMode, TextLCD::CurOff_BlkOff); |
wim | 15:b70ebfffb258 | 269 | |
wim | 15:b70ebfffb258 | 270 | // Second LCD controller Clearscreen |
wim | 15:b70ebfffb258 | 271 | _writeCommand(0x01); // cls, and set cursor to 0 |
wim | 15:b70ebfffb258 | 272 | |
wim | 15:b70ebfffb258 | 273 | wait_ms(10); // The CLS command takes 1.64 ms. |
wim | 15:b70ebfffb258 | 274 | // Since we are not using the Busy flag, Lets be safe and take 10 ms |
wim | 15:b70ebfffb258 | 275 | |
wim | 15:b70ebfffb258 | 276 | |
wim | 15:b70ebfffb258 | 277 | _ctrl=TextLCD::_LCDCtrl_0; // Select primary controller |
wim | 15:b70ebfffb258 | 278 | } |
wim | 15:b70ebfffb258 | 279 | |
wim | 15:b70ebfffb258 | 280 | // Primary LCD controller Clearscreen |
wim | 15:b70ebfffb258 | 281 | _writeCommand(0x01); // cls, and set cursor to 0 |
wim | 15:b70ebfffb258 | 282 | |
wim | 15:b70ebfffb258 | 283 | wait_ms(10); // The CLS command takes 1.64 ms. |
wim | 15:b70ebfffb258 | 284 | // Since we are not using the Busy flag, Lets be safe and take 10 ms |
wim | 15:b70ebfffb258 | 285 | |
wim | 15:b70ebfffb258 | 286 | // Restore cursormode on primary LCD controller when needed |
wim | 15:b70ebfffb258 | 287 | if(_type==LCD40x4) { |
wim | 17:652ab113bc2e | 288 | _setCursorAndDisplayMode(_currentMode,_currentCursor); |
wim | 15:b70ebfffb258 | 289 | } |
wim | 15:b70ebfffb258 | 290 | |
wim | 15:b70ebfffb258 | 291 | _row=0; // Reset Cursor location |
wim | 15:b70ebfffb258 | 292 | _column=0; |
simon | 1:ac48b187213c | 293 | } |
simon | 1:ac48b187213c | 294 | |
wim | 16:c276b75e6585 | 295 | // Move cursor to selected row and column |
simon | 1:ac48b187213c | 296 | void TextLCD::locate(int column, int row) { |
wim | 15:b70ebfffb258 | 297 | |
wim | 15:b70ebfffb258 | 298 | // setAddress() does all the heavy lifting: |
wim | 15:b70ebfffb258 | 299 | // check column and row sanity, |
wim | 15:b70ebfffb258 | 300 | // switch controllers for LCD40x4 if needed |
wim | 15:b70ebfffb258 | 301 | // switch cursor for LCD40x4 if needed |
wim | 15:b70ebfffb258 | 302 | // set the new memory address to show cursor at correct location |
wim | 15:b70ebfffb258 | 303 | setAddress(column, row); |
wim | 15:b70ebfffb258 | 304 | |
wim | 15:b70ebfffb258 | 305 | } |
wim | 15:b70ebfffb258 | 306 | |
wim | 15:b70ebfffb258 | 307 | |
wim | 16:c276b75e6585 | 308 | // Write a single character (Stream implementation) |
wim | 15:b70ebfffb258 | 309 | int TextLCD::_putc(int value) { |
wim | 15:b70ebfffb258 | 310 | int addr; |
wim | 15:b70ebfffb258 | 311 | |
wim | 15:b70ebfffb258 | 312 | if (value == '\n') { |
wim | 15:b70ebfffb258 | 313 | //No character to write |
wim | 15:b70ebfffb258 | 314 | |
wim | 15:b70ebfffb258 | 315 | //Update Cursor |
wim | 15:b70ebfffb258 | 316 | _column = 0; |
wim | 15:b70ebfffb258 | 317 | _row++; |
wim | 15:b70ebfffb258 | 318 | if (_row >= rows()) { |
wim | 15:b70ebfffb258 | 319 | _row = 0; |
wim | 15:b70ebfffb258 | 320 | } |
wim | 15:b70ebfffb258 | 321 | } |
wim | 15:b70ebfffb258 | 322 | else { |
wim | 15:b70ebfffb258 | 323 | //Character to write |
wim | 15:b70ebfffb258 | 324 | _writeData(value); |
wim | 15:b70ebfffb258 | 325 | |
wim | 15:b70ebfffb258 | 326 | //Update Cursor |
wim | 15:b70ebfffb258 | 327 | _column++; |
wim | 15:b70ebfffb258 | 328 | if (_column >= columns()) { |
wim | 15:b70ebfffb258 | 329 | _column = 0; |
wim | 15:b70ebfffb258 | 330 | _row++; |
wim | 15:b70ebfffb258 | 331 | if (_row >= rows()) { |
wim | 15:b70ebfffb258 | 332 | _row = 0; |
wim | 15:b70ebfffb258 | 333 | } |
wim | 15:b70ebfffb258 | 334 | } |
wim | 15:b70ebfffb258 | 335 | } //else |
wim | 15:b70ebfffb258 | 336 | |
wim | 15:b70ebfffb258 | 337 | //Set next memoryaddress, make sure cursor blinks at next location |
wim | 15:b70ebfffb258 | 338 | addr = getAddress(_column, _row); |
wim | 15:b70ebfffb258 | 339 | _writeCommand(0x80 | addr); |
wim | 15:b70ebfffb258 | 340 | |
wim | 15:b70ebfffb258 | 341 | return value; |
wim | 15:b70ebfffb258 | 342 | } |
wim | 15:b70ebfffb258 | 343 | |
wim | 15:b70ebfffb258 | 344 | |
wim | 16:c276b75e6585 | 345 | // get a single character (Stream implementation) |
simon | 1:ac48b187213c | 346 | int TextLCD::_getc() { |
simon | 1:ac48b187213c | 347 | return -1; |
simon | 1:ac48b187213c | 348 | } |
simon | 1:ac48b187213c | 349 | |
wim | 16:c276b75e6585 | 350 | // Set E pin (or E2 pin) |
wim | 16:c276b75e6585 | 351 | // Used for mbed pins, I2C bus expander or SPI shifregister |
wim | 13:24506ba22480 | 352 | void TextLCD::_setEnable(bool value) { |
wim | 13:24506ba22480 | 353 | |
wim | 13:24506ba22480 | 354 | switch(_busType) { |
wim | 13:24506ba22480 | 355 | case _PinBus : |
wim | 15:b70ebfffb258 | 356 | if(_ctrl==TextLCD::_LCDCtrl_0) { |
wim | 15:b70ebfffb258 | 357 | if (value) |
wim | 15:b70ebfffb258 | 358 | _e = 1; // Set E bit |
wim | 15:b70ebfffb258 | 359 | else |
wim | 15:b70ebfffb258 | 360 | _e = 0; // Reset E bit |
wim | 15:b70ebfffb258 | 361 | } |
wim | 15:b70ebfffb258 | 362 | else { |
wim | 15:b70ebfffb258 | 363 | if (value) |
wim | 15:b70ebfffb258 | 364 | _e2 = 1; // Set E2 bit |
wim | 15:b70ebfffb258 | 365 | else |
wim | 15:b70ebfffb258 | 366 | _e2 = 0; // Reset E2 bit |
wim | 15:b70ebfffb258 | 367 | } |
wim | 15:b70ebfffb258 | 368 | |
wim | 13:24506ba22480 | 369 | break; |
wim | 13:24506ba22480 | 370 | |
wim | 13:24506ba22480 | 371 | case _I2CBus : |
wim | 15:b70ebfffb258 | 372 | |
wim | 15:b70ebfffb258 | 373 | if(_ctrl==TextLCD::_LCDCtrl_0) { |
wim | 15:b70ebfffb258 | 374 | if (value) |
wim | 15:b70ebfffb258 | 375 | _lcd_bus |= D_LCD_E; // Set E bit |
wim | 15:b70ebfffb258 | 376 | else |
wim | 15:b70ebfffb258 | 377 | _lcd_bus &= ~D_LCD_E; // Reset E bit |
wim | 15:b70ebfffb258 | 378 | } |
wim | 15:b70ebfffb258 | 379 | else { |
wim | 15:b70ebfffb258 | 380 | if (value) |
wim | 15:b70ebfffb258 | 381 | _lcd_bus |= D_LCD_E2; // Set E2 bit |
wim | 15:b70ebfffb258 | 382 | else |
wim | 15:b70ebfffb258 | 383 | _lcd_bus &= ~D_LCD_E2; // Reset E2bit |
wim | 15:b70ebfffb258 | 384 | } |
wim | 15:b70ebfffb258 | 385 | |
wim | 15:b70ebfffb258 | 386 | // write the new data to the I2C portexpander |
wim | 14:0c32b66b14b8 | 387 | _i2c->write(_slaveAddress, &_lcd_bus, 1); |
wim | 15:b70ebfffb258 | 388 | |
wim | 13:24506ba22480 | 389 | break; |
wim | 13:24506ba22480 | 390 | |
wim | 13:24506ba22480 | 391 | case _SPIBus : |
wim | 15:b70ebfffb258 | 392 | if(_ctrl==TextLCD::_LCDCtrl_0) { |
wim | 15:b70ebfffb258 | 393 | if (value) |
wim | 15:b70ebfffb258 | 394 | _lcd_bus |= D_LCD_E; // Set E bit |
wim | 15:b70ebfffb258 | 395 | else |
wim | 15:b70ebfffb258 | 396 | _lcd_bus &= ~D_LCD_E; // Reset E bit |
wim | 15:b70ebfffb258 | 397 | } |
wim | 15:b70ebfffb258 | 398 | else { |
wim | 15:b70ebfffb258 | 399 | if (value) |
wim | 15:b70ebfffb258 | 400 | _lcd_bus |= D_LCD_E2; // Set E2 bit |
wim | 15:b70ebfffb258 | 401 | else |
wim | 15:b70ebfffb258 | 402 | _lcd_bus &= ~D_LCD_E2; // Reset E2 bit |
wim | 15:b70ebfffb258 | 403 | } |
wim | 15:b70ebfffb258 | 404 | |
wim | 15:b70ebfffb258 | 405 | // write the new data to the SPI portexpander |
wim | 14:0c32b66b14b8 | 406 | _setCS(false); |
wim | 14:0c32b66b14b8 | 407 | _spi->write(_lcd_bus); |
wim | 14:0c32b66b14b8 | 408 | _setCS(true); |
wim | 14:0c32b66b14b8 | 409 | |
wim | 13:24506ba22480 | 410 | break; |
wim | 13:24506ba22480 | 411 | } |
wim | 13:24506ba22480 | 412 | } |
wim | 13:24506ba22480 | 413 | |
wim | 16:c276b75e6585 | 414 | // Set RS pin |
wim | 16:c276b75e6585 | 415 | // Used for mbed pins, I2C bus expander or SPI shifregister |
wim | 13:24506ba22480 | 416 | void TextLCD::_setRS(bool value) { |
wim | 13:24506ba22480 | 417 | |
wim | 13:24506ba22480 | 418 | switch(_busType) { |
wim | 13:24506ba22480 | 419 | case _PinBus : |
wim | 13:24506ba22480 | 420 | if (value) |
wim | 13:24506ba22480 | 421 | _rs = 1; // Set RS bit |
wim | 13:24506ba22480 | 422 | else |
wim | 13:24506ba22480 | 423 | _rs = 0; // Reset RS bit |
wim | 13:24506ba22480 | 424 | |
wim | 13:24506ba22480 | 425 | break; |
wim | 13:24506ba22480 | 426 | |
wim | 13:24506ba22480 | 427 | case _I2CBus : |
wim | 14:0c32b66b14b8 | 428 | if (value) |
wim | 14:0c32b66b14b8 | 429 | _lcd_bus |= D_LCD_RS; // Set RS bit |
wim | 14:0c32b66b14b8 | 430 | else |
wim | 14:0c32b66b14b8 | 431 | _lcd_bus &= ~D_LCD_RS; // Reset RS bit |
wim | 13:24506ba22480 | 432 | |
wim | 15:b70ebfffb258 | 433 | // write the new data to the I2C portexpander |
wim | 14:0c32b66b14b8 | 434 | _i2c->write(_slaveAddress, &_lcd_bus, 1); |
wim | 13:24506ba22480 | 435 | |
wim | 13:24506ba22480 | 436 | break; |
wim | 13:24506ba22480 | 437 | |
wim | 13:24506ba22480 | 438 | case _SPIBus : |
wim | 14:0c32b66b14b8 | 439 | if (value) |
wim | 14:0c32b66b14b8 | 440 | _lcd_bus |= D_LCD_RS; // Set RS bit |
wim | 14:0c32b66b14b8 | 441 | else |
wim | 14:0c32b66b14b8 | 442 | _lcd_bus &= ~D_LCD_RS; // Reset RS bit |
wim | 14:0c32b66b14b8 | 443 | |
wim | 15:b70ebfffb258 | 444 | // write the new data to the SPI portexpander |
wim | 14:0c32b66b14b8 | 445 | _setCS(false); |
wim | 14:0c32b66b14b8 | 446 | _spi->write(_lcd_bus); |
wim | 14:0c32b66b14b8 | 447 | _setCS(true); |
wim | 14:0c32b66b14b8 | 448 | |
wim | 13:24506ba22480 | 449 | break; |
wim | 13:24506ba22480 | 450 | } |
wim | 13:24506ba22480 | 451 | |
wim | 13:24506ba22480 | 452 | } |
wim | 13:24506ba22480 | 453 | |
wim | 16:c276b75e6585 | 454 | // Place the 4bit data on the databus |
wim | 16:c276b75e6585 | 455 | // Used for mbed pins, I2C bus expander or SPI shifregister |
wim | 13:24506ba22480 | 456 | void TextLCD::_setData(int value) { |
wim | 13:24506ba22480 | 457 | int data; |
wim | 13:24506ba22480 | 458 | |
wim | 13:24506ba22480 | 459 | switch(_busType) { |
wim | 13:24506ba22480 | 460 | case _PinBus : |
wim | 13:24506ba22480 | 461 | _d = value & 0x0F; // Write Databits |
wim | 13:24506ba22480 | 462 | |
wim | 13:24506ba22480 | 463 | break; |
wim | 13:24506ba22480 | 464 | |
wim | 13:24506ba22480 | 465 | case _I2CBus : |
wim | 13:24506ba22480 | 466 | data = value & 0x0F; |
wim | 13:24506ba22480 | 467 | if (data & 0x01) |
wim | 13:24506ba22480 | 468 | _lcd_bus |= D_LCD_D4; // Set Databit |
wim | 13:24506ba22480 | 469 | else |
wim | 13:24506ba22480 | 470 | _lcd_bus &= ~D_LCD_D4; // Reset Databit |
wim | 13:24506ba22480 | 471 | |
wim | 13:24506ba22480 | 472 | if (data & 0x02) |
wim | 13:24506ba22480 | 473 | _lcd_bus |= D_LCD_D5; // Set Databit |
wim | 13:24506ba22480 | 474 | else |
wim | 13:24506ba22480 | 475 | _lcd_bus &= ~D_LCD_D5; // Reset Databit |
wim | 13:24506ba22480 | 476 | |
wim | 13:24506ba22480 | 477 | if (data & 0x04) |
wim | 13:24506ba22480 | 478 | _lcd_bus |= D_LCD_D6; // Set Databit |
wim | 13:24506ba22480 | 479 | else |
wim | 13:24506ba22480 | 480 | _lcd_bus &= ~D_LCD_D6; // Reset Databit |
wim | 13:24506ba22480 | 481 | |
wim | 13:24506ba22480 | 482 | if (data & 0x08) |
wim | 13:24506ba22480 | 483 | _lcd_bus |= D_LCD_D7; // Set Databit |
wim | 13:24506ba22480 | 484 | else |
wim | 13:24506ba22480 | 485 | _lcd_bus &= ~D_LCD_D7; // Reset Databit |
wim | 13:24506ba22480 | 486 | |
wim | 15:b70ebfffb258 | 487 | // write the new data to the I2C portexpander |
wim | 13:24506ba22480 | 488 | _i2c->write(_slaveAddress, &_lcd_bus, 1); |
wim | 13:24506ba22480 | 489 | |
wim | 13:24506ba22480 | 490 | break; |
wim | 13:24506ba22480 | 491 | |
wim | 13:24506ba22480 | 492 | case _SPIBus : |
wim | 14:0c32b66b14b8 | 493 | |
wim | 14:0c32b66b14b8 | 494 | data = value & 0x0F; |
wim | 14:0c32b66b14b8 | 495 | if (data & 0x01) |
wim | 14:0c32b66b14b8 | 496 | _lcd_bus |= D_LCD_D4; // Set Databit |
wim | 14:0c32b66b14b8 | 497 | else |
wim | 14:0c32b66b14b8 | 498 | _lcd_bus &= ~D_LCD_D4; // Reset Databit |
wim | 14:0c32b66b14b8 | 499 | |
wim | 14:0c32b66b14b8 | 500 | if (data & 0x02) |
wim | 14:0c32b66b14b8 | 501 | _lcd_bus |= D_LCD_D5; // Set Databit |
wim | 14:0c32b66b14b8 | 502 | else |
wim | 14:0c32b66b14b8 | 503 | _lcd_bus &= ~D_LCD_D5; // Reset Databit |
wim | 14:0c32b66b14b8 | 504 | |
wim | 14:0c32b66b14b8 | 505 | if (data & 0x04) |
wim | 14:0c32b66b14b8 | 506 | _lcd_bus |= D_LCD_D6; // Set Databit |
wim | 14:0c32b66b14b8 | 507 | else |
wim | 14:0c32b66b14b8 | 508 | _lcd_bus &= ~D_LCD_D6; // Reset Databit |
wim | 14:0c32b66b14b8 | 509 | |
wim | 14:0c32b66b14b8 | 510 | if (data & 0x08) |
wim | 14:0c32b66b14b8 | 511 | _lcd_bus |= D_LCD_D7; // Set Databit |
wim | 14:0c32b66b14b8 | 512 | else |
wim | 14:0c32b66b14b8 | 513 | _lcd_bus &= ~D_LCD_D7; // Reset Databit |
wim | 14:0c32b66b14b8 | 514 | |
wim | 15:b70ebfffb258 | 515 | // write the new data to the SPI portexpander |
wim | 14:0c32b66b14b8 | 516 | _setCS(false); |
wim | 14:0c32b66b14b8 | 517 | _spi->write(_lcd_bus); |
wim | 14:0c32b66b14b8 | 518 | _setCS(true); |
wim | 14:0c32b66b14b8 | 519 | |
wim | 14:0c32b66b14b8 | 520 | break; |
wim | 13:24506ba22480 | 521 | } |
wim | 13:24506ba22480 | 522 | |
wim | 13:24506ba22480 | 523 | } |
wim | 13:24506ba22480 | 524 | |
wim | 13:24506ba22480 | 525 | |
wim | 16:c276b75e6585 | 526 | // Set CS line. |
wim | 16:c276b75e6585 | 527 | // Only used for SPI bus |
wim | 14:0c32b66b14b8 | 528 | void TextLCD::_setCS(bool value) { |
wim | 14:0c32b66b14b8 | 529 | |
wim | 15:b70ebfffb258 | 530 | if (value) { |
wim | 14:0c32b66b14b8 | 531 | _cs = 1; // Set CS pin |
wim | 15:b70ebfffb258 | 532 | } |
wim | 14:0c32b66b14b8 | 533 | else |
wim | 14:0c32b66b14b8 | 534 | _cs = 0; // Reset CS pin |
wim | 15:b70ebfffb258 | 535 | |
wim | 14:0c32b66b14b8 | 536 | } |
wim | 14:0c32b66b14b8 | 537 | |
wim | 14:0c32b66b14b8 | 538 | |
wim | 17:652ab113bc2e | 539 | // Write a nibble using the 4-bit interface |
wim | 17:652ab113bc2e | 540 | // Used for mbed pins, I2C bus expander or SPI shifregister |
wim | 17:652ab113bc2e | 541 | void TextLCD::_writeNibble(int value) { |
wim | 17:652ab113bc2e | 542 | |
wim | 17:652ab113bc2e | 543 | // Enable is Low |
wim | 17:652ab113bc2e | 544 | _setEnable(true); |
wim | 17:652ab113bc2e | 545 | _setData(value & 0x0F); // Low nibble |
wim | 17:652ab113bc2e | 546 | wait_us(1); // Data setup time |
wim | 17:652ab113bc2e | 547 | _setEnable(false); |
wim | 17:652ab113bc2e | 548 | wait_us(1); // Datahold time |
wim | 17:652ab113bc2e | 549 | |
wim | 17:652ab113bc2e | 550 | // Enable is Low |
wim | 17:652ab113bc2e | 551 | |
wim | 17:652ab113bc2e | 552 | } |
wim | 17:652ab113bc2e | 553 | |
wim | 17:652ab113bc2e | 554 | |
wim | 16:c276b75e6585 | 555 | // Write a byte using the 4-bit interface |
wim | 16:c276b75e6585 | 556 | // Used for mbed pins, I2C bus expander or SPI shifregister |
wim | 13:24506ba22480 | 557 | void TextLCD::_writeByte(int value) { |
wim | 15:b70ebfffb258 | 558 | |
wim | 15:b70ebfffb258 | 559 | // Enable is Low |
wim | 15:b70ebfffb258 | 560 | _setEnable(true); |
wim | 16:c276b75e6585 | 561 | _setData(value >> 4); // High nibble |
wim | 15:b70ebfffb258 | 562 | wait_us(1); // Data setup time |
wim | 15:b70ebfffb258 | 563 | _setEnable(false); |
wim | 15:b70ebfffb258 | 564 | wait_us(1); // Data hold time |
wim | 15:b70ebfffb258 | 565 | |
wim | 13:24506ba22480 | 566 | _setEnable(true); |
wim | 16:c276b75e6585 | 567 | _setData(value >> 0); // Low nibble |
wim | 15:b70ebfffb258 | 568 | wait_us(1); // Data setup time |
wim | 13:24506ba22480 | 569 | _setEnable(false); |
wim | 15:b70ebfffb258 | 570 | wait_us(1); // Datahold time |
wim | 15:b70ebfffb258 | 571 | |
wim | 15:b70ebfffb258 | 572 | // Enable is Low |
wim | 15:b70ebfffb258 | 573 | |
simon | 1:ac48b187213c | 574 | } |
simon | 1:ac48b187213c | 575 | |
wim | 13:24506ba22480 | 576 | void TextLCD::_writeCommand(int command) { |
wim | 15:b70ebfffb258 | 577 | |
wim | 13:24506ba22480 | 578 | _setRS(false); |
wim | 16:c276b75e6585 | 579 | wait_us(1); // Data setup time for RS |
wim | 15:b70ebfffb258 | 580 | |
wim | 15:b70ebfffb258 | 581 | _writeByte(command); |
wim | 15:b70ebfffb258 | 582 | wait_us(40); // most instructions take 40us |
simon | 1:ac48b187213c | 583 | } |
simon | 1:ac48b187213c | 584 | |
wim | 13:24506ba22480 | 585 | void TextLCD::_writeData(int data) { |
wim | 15:b70ebfffb258 | 586 | |
wim | 13:24506ba22480 | 587 | _setRS(true); |
wim | 16:c276b75e6585 | 588 | wait_us(1); // Data setup time for RS |
wim | 15:b70ebfffb258 | 589 | |
wim | 13:24506ba22480 | 590 | _writeByte(data); |
wim | 15:b70ebfffb258 | 591 | wait_us(40); // data writes take 40us |
simon | 1:ac48b187213c | 592 | } |
simon | 1:ac48b187213c | 593 | |
wim | 8:03116f75b66e | 594 | |
wim | 8:03116f75b66e | 595 | #if (0) |
wim | 16:c276b75e6585 | 596 | // This is the original _address() method. |
wim | 8:03116f75b66e | 597 | // It is confusing since it returns the memoryaddress or-ed with the set memorycommand 0x80. |
wim | 8:03116f75b66e | 598 | // Left it in here for compatibility with older code. New applications should use getAddress() instead. |
wim | 8:03116f75b66e | 599 | // |
wim | 13:24506ba22480 | 600 | int TextLCD::_address(int column, int row) { |
simon | 1:ac48b187213c | 601 | switch (_type) { |
simon | 1:ac48b187213c | 602 | case LCD20x4: |
simon | 1:ac48b187213c | 603 | switch (row) { |
simon | 1:ac48b187213c | 604 | case 0: |
simon | 1:ac48b187213c | 605 | return 0x80 + column; |
simon | 1:ac48b187213c | 606 | case 1: |
simon | 1:ac48b187213c | 607 | return 0xc0 + column; |
simon | 1:ac48b187213c | 608 | case 2: |
simon | 1:ac48b187213c | 609 | return 0x94 + column; |
simon | 1:ac48b187213c | 610 | case 3: |
simon | 1:ac48b187213c | 611 | return 0xd4 + column; |
simon | 1:ac48b187213c | 612 | } |
simon | 1:ac48b187213c | 613 | case LCD16x2B: |
simon | 4:bf5b706f8d32 | 614 | return 0x80 + (row * 40) + column; |
simon | 1:ac48b187213c | 615 | case LCD16x2: |
simon | 1:ac48b187213c | 616 | case LCD20x2: |
simon | 1:ac48b187213c | 617 | default: |
simon | 4:bf5b706f8d32 | 618 | return 0x80 + (row * 0x40) + column; |
simon | 1:ac48b187213c | 619 | } |
simon | 1:ac48b187213c | 620 | } |
wim | 8:03116f75b66e | 621 | #endif |
wim | 8:03116f75b66e | 622 | |
wim | 8:03116f75b66e | 623 | |
wim | 16:c276b75e6585 | 624 | // This replaces the original _address() method. |
wim | 8:03116f75b66e | 625 | // Left it in here for compatibility with older code. New applications should use getAddress() instead. |
wim | 13:24506ba22480 | 626 | int TextLCD::_address(int column, int row) { |
wim | 8:03116f75b66e | 627 | return 0x80 | getAddress(column, row); |
wim | 8:03116f75b66e | 628 | } |
wim | 8:03116f75b66e | 629 | |
wim | 8:03116f75b66e | 630 | // This is new method to return the memory address based on row, column and displaytype. |
wim | 8:03116f75b66e | 631 | // |
wim | 8:03116f75b66e | 632 | int TextLCD::getAddress(int column, int row) { |
wim | 8:03116f75b66e | 633 | |
wim | 8:03116f75b66e | 634 | switch (_type) { |
wim | 8:03116f75b66e | 635 | case LCD8x1: |
wim | 8:03116f75b66e | 636 | return 0x00 + column; |
wim | 18:bd65dc10f27f | 637 | |
wim | 18:bd65dc10f27f | 638 | case LCD8x2B: |
wim | 18:bd65dc10f27f | 639 | // LCD8x2B is a special layout of LCD16x1 |
wim | 18:bd65dc10f27f | 640 | if (row==0) |
wim | 18:bd65dc10f27f | 641 | return 0x00 + column; |
wim | 18:bd65dc10f27f | 642 | else |
wim | 18:bd65dc10f27f | 643 | return 0x08 + column; |
wim | 18:bd65dc10f27f | 644 | |
wim | 18:bd65dc10f27f | 645 | |
wim | 13:24506ba22480 | 646 | case LCD16x1: |
wim | 13:24506ba22480 | 647 | // LCD16x1 is a special layout of LCD8x2 |
wim | 13:24506ba22480 | 648 | if (column<8) |
wim | 13:24506ba22480 | 649 | return 0x00 + column; |
wim | 13:24506ba22480 | 650 | else |
wim | 13:24506ba22480 | 651 | return 0x40 + (column - 8); |
wim | 13:24506ba22480 | 652 | |
wim | 15:b70ebfffb258 | 653 | case LCD12x4: |
wim | 15:b70ebfffb258 | 654 | switch (row) { |
wim | 15:b70ebfffb258 | 655 | case 0: |
wim | 15:b70ebfffb258 | 656 | return 0x00 + column; |
wim | 15:b70ebfffb258 | 657 | case 1: |
wim | 15:b70ebfffb258 | 658 | return 0x40 + column; |
wim | 15:b70ebfffb258 | 659 | case 2: |
wim | 15:b70ebfffb258 | 660 | return 0x0C + column; |
wim | 15:b70ebfffb258 | 661 | case 3: |
wim | 15:b70ebfffb258 | 662 | return 0x4C + column; |
wim | 15:b70ebfffb258 | 663 | } |
wim | 15:b70ebfffb258 | 664 | |
wim | 8:03116f75b66e | 665 | case LCD16x4: |
wim | 8:03116f75b66e | 666 | switch (row) { |
wim | 8:03116f75b66e | 667 | case 0: |
wim | 8:03116f75b66e | 668 | return 0x00 + column; |
wim | 8:03116f75b66e | 669 | case 1: |
wim | 8:03116f75b66e | 670 | return 0x40 + column; |
wim | 8:03116f75b66e | 671 | case 2: |
wim | 8:03116f75b66e | 672 | return 0x10 + column; |
wim | 8:03116f75b66e | 673 | case 3: |
wim | 8:03116f75b66e | 674 | return 0x50 + column; |
wim | 8:03116f75b66e | 675 | } |
wim | 8:03116f75b66e | 676 | |
wim | 8:03116f75b66e | 677 | case LCD20x4: |
wim | 8:03116f75b66e | 678 | switch (row) { |
wim | 8:03116f75b66e | 679 | case 0: |
wim | 8:03116f75b66e | 680 | return 0x00 + column; |
wim | 8:03116f75b66e | 681 | case 1: |
wim | 8:03116f75b66e | 682 | return 0x40 + column; |
wim | 8:03116f75b66e | 683 | case 2: |
wim | 8:03116f75b66e | 684 | return 0x14 + column; |
wim | 8:03116f75b66e | 685 | case 3: |
wim | 8:03116f75b66e | 686 | return 0x54 + column; |
wim | 8:03116f75b66e | 687 | } |
wim | 8:03116f75b66e | 688 | |
wim | 10:dd9b3a696acd | 689 | // Special mode for KS0078 |
wim | 10:dd9b3a696acd | 690 | case LCD24x4: |
wim | 10:dd9b3a696acd | 691 | switch (row) { |
wim | 10:dd9b3a696acd | 692 | case 0: |
wim | 10:dd9b3a696acd | 693 | return 0x00 + column; |
wim | 10:dd9b3a696acd | 694 | case 1: |
wim | 10:dd9b3a696acd | 695 | return 0x20 + column; |
wim | 10:dd9b3a696acd | 696 | case 2: |
wim | 10:dd9b3a696acd | 697 | return 0x40 + column; |
wim | 10:dd9b3a696acd | 698 | case 3: |
wim | 10:dd9b3a696acd | 699 | return 0x60 + column; |
wim | 10:dd9b3a696acd | 700 | } |
wim | 10:dd9b3a696acd | 701 | |
wim | 8:03116f75b66e | 702 | // Not sure about this one, seems wrong. |
wim | 8:03116f75b66e | 703 | case LCD16x2B: |
wim | 8:03116f75b66e | 704 | return 0x00 + (row * 40) + column; |
wim | 8:03116f75b66e | 705 | |
wim | 18:bd65dc10f27f | 706 | case LCD8x2: |
wim | 15:b70ebfffb258 | 707 | case LCD12x2: |
wim | 8:03116f75b66e | 708 | case LCD16x2: |
wim | 8:03116f75b66e | 709 | case LCD20x2: |
wim | 8:03116f75b66e | 710 | case LCD24x2: |
wim | 9:0893d986e717 | 711 | case LCD40x2: |
wim | 8:03116f75b66e | 712 | return 0x00 + (row * 0x40) + column; |
wim | 15:b70ebfffb258 | 713 | |
wim | 15:b70ebfffb258 | 714 | case LCD40x4: |
wim | 15:b70ebfffb258 | 715 | // LCD40x4 is a special case since it has 2 controllers |
wim | 15:b70ebfffb258 | 716 | // Each controller is configured as 40x2 |
wim | 15:b70ebfffb258 | 717 | if (row<2) { |
wim | 15:b70ebfffb258 | 718 | // Test to see if we need to switch between controllers |
wim | 15:b70ebfffb258 | 719 | if (_ctrl != _LCDCtrl_0) { |
wim | 17:652ab113bc2e | 720 | |
wim | 15:b70ebfffb258 | 721 | // Second LCD controller Cursor Off |
wim | 17:652ab113bc2e | 722 | _setCursorAndDisplayMode(_currentMode, TextLCD::CurOff_BlkOff); |
wim | 15:b70ebfffb258 | 723 | |
wim | 15:b70ebfffb258 | 724 | // Select primary controller |
wim | 15:b70ebfffb258 | 725 | _ctrl = _LCDCtrl_0; |
wim | 15:b70ebfffb258 | 726 | |
wim | 15:b70ebfffb258 | 727 | // Restore cursormode on primary LCD controller |
wim | 17:652ab113bc2e | 728 | _setCursorAndDisplayMode(_currentMode, _currentCursor); |
wim | 15:b70ebfffb258 | 729 | } |
wim | 15:b70ebfffb258 | 730 | |
wim | 15:b70ebfffb258 | 731 | return 0x00 + (row * 0x40) + column; |
wim | 15:b70ebfffb258 | 732 | } |
wim | 15:b70ebfffb258 | 733 | else { |
wim | 15:b70ebfffb258 | 734 | |
wim | 15:b70ebfffb258 | 735 | // Test to see if we need to switch between controllers |
wim | 15:b70ebfffb258 | 736 | if (_ctrl != _LCDCtrl_1) { |
wim | 15:b70ebfffb258 | 737 | // Primary LCD controller Cursor Off |
wim | 17:652ab113bc2e | 738 | _setCursorAndDisplayMode(_currentMode, TextLCD::CurOff_BlkOff); |
wim | 15:b70ebfffb258 | 739 | |
wim | 15:b70ebfffb258 | 740 | // Select secondary controller |
wim | 15:b70ebfffb258 | 741 | _ctrl = _LCDCtrl_1; |
wim | 15:b70ebfffb258 | 742 | |
wim | 15:b70ebfffb258 | 743 | // Restore cursormode on secondary LCD controller |
wim | 17:652ab113bc2e | 744 | _setCursorAndDisplayMode(_currentMode, _currentCursor); |
wim | 15:b70ebfffb258 | 745 | } |
wim | 15:b70ebfffb258 | 746 | |
wim | 15:b70ebfffb258 | 747 | return 0x00 + ((row-2) * 0x40) + column; |
wim | 15:b70ebfffb258 | 748 | } |
wim | 8:03116f75b66e | 749 | |
wim | 8:03116f75b66e | 750 | // Should never get here. |
wim | 8:03116f75b66e | 751 | default: |
wim | 8:03116f75b66e | 752 | return 0x00; |
wim | 8:03116f75b66e | 753 | } |
wim | 8:03116f75b66e | 754 | } |
wim | 8:03116f75b66e | 755 | |
wim | 8:03116f75b66e | 756 | |
wim | 15:b70ebfffb258 | 757 | // Set row, column and update memoryaddress. |
wim | 8:03116f75b66e | 758 | // |
wim | 8:03116f75b66e | 759 | void TextLCD::setAddress(int column, int row) { |
wim | 15:b70ebfffb258 | 760 | |
wim | 15:b70ebfffb258 | 761 | // Sanity Check column |
wim | 15:b70ebfffb258 | 762 | if (column < 0) { |
wim | 15:b70ebfffb258 | 763 | _column = 0; |
wim | 15:b70ebfffb258 | 764 | } |
wim | 15:b70ebfffb258 | 765 | else if (column >= columns()) { |
wim | 15:b70ebfffb258 | 766 | _column = columns() - 1; |
wim | 15:b70ebfffb258 | 767 | } else _column = column; |
wim | 8:03116f75b66e | 768 | |
wim | 15:b70ebfffb258 | 769 | // Sanity Check row |
wim | 15:b70ebfffb258 | 770 | if (row < 0) { |
wim | 15:b70ebfffb258 | 771 | _row = 0; |
wim | 15:b70ebfffb258 | 772 | } |
wim | 15:b70ebfffb258 | 773 | else if (row >= rows()) { |
wim | 15:b70ebfffb258 | 774 | _row = rows() - 1; |
wim | 15:b70ebfffb258 | 775 | } else _row = row; |
wim | 15:b70ebfffb258 | 776 | |
wim | 15:b70ebfffb258 | 777 | |
wim | 15:b70ebfffb258 | 778 | // Compute the memory address |
wim | 15:b70ebfffb258 | 779 | // For LCD40x4: switch controllers if needed |
wim | 15:b70ebfffb258 | 780 | // switch cursor if needed |
wim | 15:b70ebfffb258 | 781 | int addr = getAddress(_column, _row); |
wim | 8:03116f75b66e | 782 | |
wim | 13:24506ba22480 | 783 | _writeCommand(0x80 | addr); |
wim | 8:03116f75b66e | 784 | } |
simon | 1:ac48b187213c | 785 | |
simon | 1:ac48b187213c | 786 | int TextLCD::columns() { |
simon | 1:ac48b187213c | 787 | switch (_type) { |
wim | 8:03116f75b66e | 788 | case LCD8x1: |
wim | 8:03116f75b66e | 789 | case LCD8x2: |
wim | 18:bd65dc10f27f | 790 | case LCD8x2B: |
wim | 8:03116f75b66e | 791 | return 8; |
wim | 15:b70ebfffb258 | 792 | |
wim | 15:b70ebfffb258 | 793 | case LCD12x2: |
wim | 15:b70ebfffb258 | 794 | case LCD12x4: |
wim | 15:b70ebfffb258 | 795 | return 12; |
wim | 8:03116f75b66e | 796 | |
wim | 13:24506ba22480 | 797 | case LCD16x1: |
simon | 1:ac48b187213c | 798 | case LCD16x2: |
simon | 1:ac48b187213c | 799 | case LCD16x2B: |
wim | 8:03116f75b66e | 800 | case LCD16x4: |
wim | 8:03116f75b66e | 801 | return 16; |
wim | 8:03116f75b66e | 802 | |
wim | 8:03116f75b66e | 803 | case LCD20x2: |
wim | 8:03116f75b66e | 804 | case LCD20x4: |
wim | 8:03116f75b66e | 805 | return 20; |
wim | 8:03116f75b66e | 806 | |
wim | 8:03116f75b66e | 807 | case LCD24x2: |
wim | 10:dd9b3a696acd | 808 | case LCD24x4: |
wim | 8:03116f75b66e | 809 | return 24; |
wim | 9:0893d986e717 | 810 | |
wim | 9:0893d986e717 | 811 | case LCD40x2: |
wim | 15:b70ebfffb258 | 812 | case LCD40x4: |
wim | 9:0893d986e717 | 813 | return 40; |
wim | 8:03116f75b66e | 814 | |
wim | 8:03116f75b66e | 815 | // Should never get here. |
simon | 1:ac48b187213c | 816 | default: |
wim | 8:03116f75b66e | 817 | return 0; |
simon | 1:ac48b187213c | 818 | } |
simon | 1:ac48b187213c | 819 | } |
simon | 1:ac48b187213c | 820 | |
simon | 1:ac48b187213c | 821 | int TextLCD::rows() { |
simon | 1:ac48b187213c | 822 | switch (_type) { |
wim | 8:03116f75b66e | 823 | case LCD8x1: |
wim | 13:24506ba22480 | 824 | case LCD16x1: |
wim | 8:03116f75b66e | 825 | return 1; |
wim | 8:03116f75b66e | 826 | |
wim | 15:b70ebfffb258 | 827 | case LCD8x2: |
wim | 18:bd65dc10f27f | 828 | case LCD8x2B: |
wim | 15:b70ebfffb258 | 829 | case LCD12x2: |
simon | 1:ac48b187213c | 830 | case LCD16x2: |
simon | 1:ac48b187213c | 831 | case LCD16x2B: |
simon | 1:ac48b187213c | 832 | case LCD20x2: |
wim | 8:03116f75b66e | 833 | case LCD24x2: |
wim | 9:0893d986e717 | 834 | case LCD40x2: |
wim | 8:03116f75b66e | 835 | return 2; |
wim | 8:03116f75b66e | 836 | |
wim | 15:b70ebfffb258 | 837 | case LCD12x4: |
wim | 8:03116f75b66e | 838 | case LCD16x4: |
wim | 8:03116f75b66e | 839 | case LCD20x4: |
wim | 10:dd9b3a696acd | 840 | case LCD24x4: |
wim | 15:b70ebfffb258 | 841 | case LCD40x4: |
wim | 8:03116f75b66e | 842 | return 4; |
wim | 12:6bf9d9957d31 | 843 | |
wim | 12:6bf9d9957d31 | 844 | // Should never get here. |
simon | 1:ac48b187213c | 845 | default: |
wim | 8:03116f75b66e | 846 | return 0; |
simon | 1:ac48b187213c | 847 | } |
simon | 1:ac48b187213c | 848 | } |
wim | 10:dd9b3a696acd | 849 | |
wim | 10:dd9b3a696acd | 850 | |
wim | 17:652ab113bc2e | 851 | // Set the Cursor Mode (Cursor Off & Blink Off, Cursor On & Blink Off, Cursor Off & Blink On, Cursor On & Blink On |
wim | 17:652ab113bc2e | 852 | void TextLCD::setCursor(TextLCD::LCDCursor cursorMode) { |
wim | 15:b70ebfffb258 | 853 | |
wim | 17:652ab113bc2e | 854 | // Save new cursor mode, needed when 2 controllers are in use or when display is switched off/on |
wim | 17:652ab113bc2e | 855 | _currentCursor = cursorMode; |
wim | 10:dd9b3a696acd | 856 | |
wim | 17:652ab113bc2e | 857 | // Configure only current LCD controller |
wim | 17:652ab113bc2e | 858 | _setCursorAndDisplayMode(_currentMode, _currentCursor); |
wim | 15:b70ebfffb258 | 859 | |
wim | 15:b70ebfffb258 | 860 | } |
wim | 15:b70ebfffb258 | 861 | |
wim | 17:652ab113bc2e | 862 | // Set the Displaymode (On/Off) |
wim | 17:652ab113bc2e | 863 | void TextLCD::setMode(TextLCD::LCDMode displayMode) { |
wim | 17:652ab113bc2e | 864 | |
wim | 17:652ab113bc2e | 865 | // Save new displayMode, needed when 2 controllers are in use or when cursor is changed |
wim | 17:652ab113bc2e | 866 | _currentMode = displayMode; |
wim | 15:b70ebfffb258 | 867 | |
wim | 17:652ab113bc2e | 868 | // Select and configure second LCD controller when needed |
wim | 17:652ab113bc2e | 869 | if(_type==LCD40x4) { |
wim | 17:652ab113bc2e | 870 | if (_ctrl==TextLCD::_LCDCtrl_0) { |
wim | 17:652ab113bc2e | 871 | // Configure primary LCD controller |
wim | 17:652ab113bc2e | 872 | _setCursorAndDisplayMode(_currentMode, _currentCursor); |
wim | 11:9ec02df863a1 | 873 | |
wim | 17:652ab113bc2e | 874 | // Select 2nd controller |
wim | 17:652ab113bc2e | 875 | _ctrl=TextLCD::_LCDCtrl_1; |
wim | 17:652ab113bc2e | 876 | |
wim | 17:652ab113bc2e | 877 | // Configure secondary LCD controller |
wim | 17:652ab113bc2e | 878 | _setCursorAndDisplayMode(_currentMode, TextLCD::CurOff_BlkOff); |
wim | 11:9ec02df863a1 | 879 | |
wim | 17:652ab113bc2e | 880 | // Restore current controller |
wim | 17:652ab113bc2e | 881 | _ctrl=TextLCD::_LCDCtrl_0; |
wim | 17:652ab113bc2e | 882 | } |
wim | 17:652ab113bc2e | 883 | else { |
wim | 17:652ab113bc2e | 884 | // Select primary controller |
wim | 17:652ab113bc2e | 885 | _ctrl=TextLCD::_LCDCtrl_0; |
wim | 17:652ab113bc2e | 886 | |
wim | 17:652ab113bc2e | 887 | // Configure primary LCD controller |
wim | 17:652ab113bc2e | 888 | _setCursorAndDisplayMode(_currentMode, TextLCD::CurOff_BlkOff); |
wim | 17:652ab113bc2e | 889 | |
wim | 17:652ab113bc2e | 890 | // Restore current controller |
wim | 17:652ab113bc2e | 891 | _ctrl=TextLCD::_LCDCtrl_1; |
wim | 11:9ec02df863a1 | 892 | |
wim | 17:652ab113bc2e | 893 | // Configure secondary LCD controller |
wim | 17:652ab113bc2e | 894 | _setCursorAndDisplayMode(_currentMode, _currentCursor); |
wim | 11:9ec02df863a1 | 895 | |
wim | 10:dd9b3a696acd | 896 | } |
wim | 17:652ab113bc2e | 897 | } |
wim | 17:652ab113bc2e | 898 | else { |
wim | 17:652ab113bc2e | 899 | // Configure primary LCD controller |
wim | 17:652ab113bc2e | 900 | _setCursorAndDisplayMode(_currentMode, _currentCursor); |
wim | 17:652ab113bc2e | 901 | } |
wim | 17:652ab113bc2e | 902 | |
wim | 17:652ab113bc2e | 903 | } |
wim | 17:652ab113bc2e | 904 | |
wim | 17:652ab113bc2e | 905 | |
wim | 17:652ab113bc2e | 906 | // Set the Displaymode (On/Off) and Cursortype for current controller |
wim | 17:652ab113bc2e | 907 | void TextLCD::_setCursorAndDisplayMode(TextLCD::LCDMode displayMode, TextLCD::LCDCursor cursorType) { |
wim | 17:652ab113bc2e | 908 | |
wim | 17:652ab113bc2e | 909 | // Configure current LCD controller |
wim | 17:652ab113bc2e | 910 | _writeCommand(0x08 | displayMode | cursorType); |
wim | 10:dd9b3a696acd | 911 | } |
wim | 10:dd9b3a696acd | 912 | |
wim | 10:dd9b3a696acd | 913 | |
wim | 11:9ec02df863a1 | 914 | void TextLCD::setUDC(unsigned char c, char *udc_data) { |
wim | 15:b70ebfffb258 | 915 | |
wim | 15:b70ebfffb258 | 916 | // Select and configure second LCD controller when needed |
wim | 15:b70ebfffb258 | 917 | if(_type==LCD40x4) { |
wim | 15:b70ebfffb258 | 918 | _LCDCtrl current_ctrl = _ctrl; // Temp save current controller |
wim | 15:b70ebfffb258 | 919 | |
wim | 15:b70ebfffb258 | 920 | // Select primary controller |
wim | 15:b70ebfffb258 | 921 | _ctrl=TextLCD::_LCDCtrl_0; |
wim | 15:b70ebfffb258 | 922 | |
wim | 15:b70ebfffb258 | 923 | // Configure primary LCD controller |
wim | 15:b70ebfffb258 | 924 | _setUDC(c, udc_data); |
wim | 15:b70ebfffb258 | 925 | |
wim | 15:b70ebfffb258 | 926 | // Select 2nd controller |
wim | 15:b70ebfffb258 | 927 | _ctrl=TextLCD::_LCDCtrl_1; |
wim | 15:b70ebfffb258 | 928 | |
wim | 15:b70ebfffb258 | 929 | // Configure secondary LCD controller |
wim | 15:b70ebfffb258 | 930 | _setUDC(c, udc_data); |
wim | 11:9ec02df863a1 | 931 | |
wim | 15:b70ebfffb258 | 932 | // Restore current controller |
wim | 15:b70ebfffb258 | 933 | _ctrl=current_ctrl; |
wim | 15:b70ebfffb258 | 934 | } |
wim | 15:b70ebfffb258 | 935 | else { |
wim | 15:b70ebfffb258 | 936 | // Configure primary LCD controller |
wim | 15:b70ebfffb258 | 937 | _setUDC(c, udc_data); |
wim | 15:b70ebfffb258 | 938 | } |
wim | 15:b70ebfffb258 | 939 | |
wim | 15:b70ebfffb258 | 940 | } |
wim | 15:b70ebfffb258 | 941 | |
wim | 15:b70ebfffb258 | 942 | void TextLCD::_setUDC(unsigned char c, char *udc_data) { |
wim | 15:b70ebfffb258 | 943 | |
wim | 15:b70ebfffb258 | 944 | // Select CG RAM for current LCD controller |
wim | 15:b70ebfffb258 | 945 | _writeCommand(0x40 + ((c & 0x07) << 3)); //Set CG-RAM address, |
wim | 15:b70ebfffb258 | 946 | //8 sequential locations needed per UDC |
wim | 15:b70ebfffb258 | 947 | // Store UDC pattern |
wim | 11:9ec02df863a1 | 948 | for (int i=0; i<8; i++) { |
wim | 13:24506ba22480 | 949 | _writeData(*udc_data++); |
wim | 11:9ec02df863a1 | 950 | } |
wim | 15:b70ebfffb258 | 951 | |
wim | 15:b70ebfffb258 | 952 | //Select DD RAM again for current LCD controller |
wim | 15:b70ebfffb258 | 953 | int addr = getAddress(_column, _row); |
wim | 15:b70ebfffb258 | 954 | _writeCommand(0x80 | addr); |
wim | 15:b70ebfffb258 | 955 | |
wim | 11:9ec02df863a1 | 956 | } |