Justin Howard / Mbed 2 deprecated AdaFruit_RGBLCD

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Dependencies:   AdaFruit_RGBLCDShield MCP23017 mbed RTclock

Dependents:   SX1276_GPS

Fork of MCP_test by Wim Huiskamp

AdaFruit_RGBLCDShield.cpp@3:ed09f95739df, 2014-08-02 (annotated)

Committer:
vtraveller
Date:
Sat Aug 02 12:39:25 2014 +0000
Revision:
3:ed09f95739df
Child:
4:d70e37f6c6bd
snapshot

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vtraveller 3:ed09f95739df 1 /***************************************************
vtraveller 3:ed09f95739df 2 This is a library for the Adafruit RGB 16x2 LCD Shield
vtraveller 3:ed09f95739df 3 Pick one up at the Adafruit shop!
vtraveller 3:ed09f95739df 4 ---------> http://http://www.adafruit.com/products/714
vtraveller 3:ed09f95739df 5
vtraveller 3:ed09f95739df 6 The shield uses I2C to communicate, 2 pins are required to
vtraveller 3:ed09f95739df 7 interface
vtraveller 3:ed09f95739df 8 Adafruit invests time and resources providing this open source code,
vtraveller 3:ed09f95739df 9 please support Adafruit and open-source hardware by purchasing
vtraveller 3:ed09f95739df 10 products from Adafruit!
vtraveller 3:ed09f95739df 11
vtraveller 3:ed09f95739df 12 Written by Limor Fried/Ladyada for Adafruit Industries.
vtraveller 3:ed09f95739df 13 BSD license, all text above must be included in any redistribution
vtraveller 3:ed09f95739df 14 ****************************************************/
vtraveller 3:ed09f95739df 15
vtraveller 3:ed09f95739df 16
vtraveller 3:ed09f95739df 17 #include "Adafruit_RGBLCDShield.h"
vtraveller 3:ed09f95739df 18
vtraveller 3:ed09f95739df 19 #include <stdio.h>
vtraveller 3:ed09f95739df 20 #include <string.h>
vtraveller 3:ed09f95739df 21 #include <inttypes.h>
vtraveller 3:ed09f95739df 22 #include <Wire.h>
vtraveller 3:ed09f95739df 23 #ifdef __AVR__
vtraveller 3:ed09f95739df 24 #define WIRE Wire
vtraveller 3:ed09f95739df 25 #else // Arduino Due
vtraveller 3:ed09f95739df 26 #define WIRE Wire1
vtraveller 3:ed09f95739df 27 #endif
vtraveller 3:ed09f95739df 28
vtraveller 3:ed09f95739df 29 #if ARDUINO >= 100
vtraveller 3:ed09f95739df 30 #include "Arduino.h"
vtraveller 3:ed09f95739df 31 #else
vtraveller 3:ed09f95739df 32 #include "WProgram.h"
vtraveller 3:ed09f95739df 33 #endif
vtraveller 3:ed09f95739df 34
vtraveller 3:ed09f95739df 35 // When the display powers up, it is configured as follows:
vtraveller 3:ed09f95739df 36 //
vtraveller 3:ed09f95739df 37 // 1. Display clear
vtraveller 3:ed09f95739df 38 // 2. Function set:
vtraveller 3:ed09f95739df 39 // DL = 1; 8-bit interface data
vtraveller 3:ed09f95739df 40 // N = 0; 1-line display
vtraveller 3:ed09f95739df 41 // F = 0; 5x8 dot character font
vtraveller 3:ed09f95739df 42 // 3. Display on/off control:
vtraveller 3:ed09f95739df 43 // D = 0; Display off
vtraveller 3:ed09f95739df 44 // C = 0; Cursor off
vtraveller 3:ed09f95739df 45 // B = 0; Blinking off
vtraveller 3:ed09f95739df 46 // 4. Entry mode set:
vtraveller 3:ed09f95739df 47 // I/D = 1; Increment by 1
vtraveller 3:ed09f95739df 48 // S = 0; No shift
vtraveller 3:ed09f95739df 49 //
vtraveller 3:ed09f95739df 50 // Note, however, that resetting the Arduino doesn't reset the LCD, so we
vtraveller 3:ed09f95739df 51 // can't assume that its in that state when a sketch starts (and the
vtraveller 3:ed09f95739df 52 // RGBLCDShield constructor is called).
vtraveller 3:ed09f95739df 53
vtraveller 3:ed09f95739df 54 Adafruit_RGBLCDShield::Adafruit_RGBLCDShield() {
vtraveller 3:ed09f95739df 55 _i2cAddr = 0;
vtraveller 3:ed09f95739df 56
vtraveller 3:ed09f95739df 57 _displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
vtraveller 3:ed09f95739df 58
vtraveller 3:ed09f95739df 59 // the I/O expander pinout
vtraveller 3:ed09f95739df 60 _rs_pin = 15;
vtraveller 3:ed09f95739df 61 _rw_pin = 14;
vtraveller 3:ed09f95739df 62 _enable_pin = 13;
vtraveller 3:ed09f95739df 63 _data_pins[0] = 12; // really d4
vtraveller 3:ed09f95739df 64 _data_pins[1] = 11; // really d5
vtraveller 3:ed09f95739df 65 _data_pins[2] = 10; // really d6
vtraveller 3:ed09f95739df 66 _data_pins[3] = 9; // really d7
vtraveller 3:ed09f95739df 67
vtraveller 3:ed09f95739df 68 _button_pins[0] = 0;
vtraveller 3:ed09f95739df 69 _button_pins[1] = 1;
vtraveller 3:ed09f95739df 70 _button_pins[2] = 2;
vtraveller 3:ed09f95739df 71 _button_pins[3] = 3;
vtraveller 3:ed09f95739df 72 _button_pins[4] = 4;
vtraveller 3:ed09f95739df 73 // we can't begin() yet :(
vtraveller 3:ed09f95739df 74 }
vtraveller 3:ed09f95739df 75
vtraveller 3:ed09f95739df 76
vtraveller 3:ed09f95739df 77
vtraveller 3:ed09f95739df 78
vtraveller 3:ed09f95739df 79 void Adafruit_RGBLCDShield::init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
vtraveller 3:ed09f95739df 80 uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
vtraveller 3:ed09f95739df 81 uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
vtraveller 3:ed09f95739df 82 {
vtraveller 3:ed09f95739df 83 _rs_pin = rs;
vtraveller 3:ed09f95739df 84 _rw_pin = rw;
vtraveller 3:ed09f95739df 85 _enable_pin = enable;
vtraveller 3:ed09f95739df 86
vtraveller 3:ed09f95739df 87 _data_pins[0] = d0;
vtraveller 3:ed09f95739df 88 _data_pins[1] = d1;
vtraveller 3:ed09f95739df 89 _data_pins[2] = d2;
vtraveller 3:ed09f95739df 90 _data_pins[3] = d3;
vtraveller 3:ed09f95739df 91 _data_pins[4] = d4;
vtraveller 3:ed09f95739df 92 _data_pins[5] = d5;
vtraveller 3:ed09f95739df 93 _data_pins[6] = d6;
vtraveller 3:ed09f95739df 94 _data_pins[7] = d7;
vtraveller 3:ed09f95739df 95
vtraveller 3:ed09f95739df 96 _i2cAddr = 255;
vtraveller 3:ed09f95739df 97
vtraveller 3:ed09f95739df 98 _pinMode(_rs_pin, OUTPUT);
vtraveller 3:ed09f95739df 99 // we can save 1 pin by not using RW. Indicate by passing 255 instead of pin#
vtraveller 3:ed09f95739df 100 if (_rw_pin != 255) {
vtraveller 3:ed09f95739df 101 _pinMode(_rw_pin, OUTPUT);
vtraveller 3:ed09f95739df 102 }
vtraveller 3:ed09f95739df 103 _pinMode(_enable_pin, OUTPUT);
vtraveller 3:ed09f95739df 104
vtraveller 3:ed09f95739df 105
vtraveller 3:ed09f95739df 106 if (fourbitmode)
vtraveller 3:ed09f95739df 107 _displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
vtraveller 3:ed09f95739df 108 else
vtraveller 3:ed09f95739df 109 _displayfunction = LCD_8BITMODE | LCD_1LINE | LCD_5x8DOTS;
vtraveller 3:ed09f95739df 110
vtraveller 3:ed09f95739df 111 begin(16, 1);
vtraveller 3:ed09f95739df 112 }
vtraveller 3:ed09f95739df 113
vtraveller 3:ed09f95739df 114 void Adafruit_RGBLCDShield::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
vtraveller 3:ed09f95739df 115 // check if i2c
vtraveller 3:ed09f95739df 116 if (_i2cAddr != 255) {
vtraveller 3:ed09f95739df 117 //_i2c.begin(_i2cAddr);
vtraveller 3:ed09f95739df 118 WIRE.begin();
vtraveller 3:ed09f95739df 119 _i2c.begin();
vtraveller 3:ed09f95739df 120
vtraveller 3:ed09f95739df 121 _i2c.pinMode(8, OUTPUT);
vtraveller 3:ed09f95739df 122 _i2c.pinMode(6, OUTPUT);
vtraveller 3:ed09f95739df 123 _i2c.pinMode(7, OUTPUT);
vtraveller 3:ed09f95739df 124 setBacklight(0x7);
vtraveller 3:ed09f95739df 125
vtraveller 3:ed09f95739df 126 if (_rw_pin)
vtraveller 3:ed09f95739df 127 _i2c.pinMode(_rw_pin, OUTPUT);
vtraveller 3:ed09f95739df 128
vtraveller 3:ed09f95739df 129 _i2c.pinMode(_rs_pin, OUTPUT);
vtraveller 3:ed09f95739df 130 _i2c.pinMode(_enable_pin, OUTPUT);
vtraveller 3:ed09f95739df 131 for (uint8_t i=0; i<4; i++)
vtraveller 3:ed09f95739df 132 _i2c.pinMode(_data_pins[i], OUTPUT);
vtraveller 3:ed09f95739df 133
vtraveller 3:ed09f95739df 134 for (uint8_t i=0; i<5; i++) {
vtraveller 3:ed09f95739df 135 _i2c.pinMode(_button_pins[i], INPUT);
vtraveller 3:ed09f95739df 136 _i2c.pullUp(_button_pins[i], 1);
vtraveller 3:ed09f95739df 137 }
vtraveller 3:ed09f95739df 138 }
vtraveller 3:ed09f95739df 139
vtraveller 3:ed09f95739df 140 if (lines > 1) {
vtraveller 3:ed09f95739df 141 _displayfunction |= LCD_2LINE;
vtraveller 3:ed09f95739df 142 }
vtraveller 3:ed09f95739df 143 _numlines = lines;
vtraveller 3:ed09f95739df 144 _currline = 0;
vtraveller 3:ed09f95739df 145
vtraveller 3:ed09f95739df 146 // for some 1 line displays you can select a 10 pixel high font
vtraveller 3:ed09f95739df 147 if ((dotsize != 0) && (lines == 1)) {
vtraveller 3:ed09f95739df 148 _displayfunction |= LCD_5x10DOTS;
vtraveller 3:ed09f95739df 149 }
vtraveller 3:ed09f95739df 150
vtraveller 3:ed09f95739df 151 // SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
vtraveller 3:ed09f95739df 152 // according to datasheet, we need at least 40ms after power rises above 2.7V
vtraveller 3:ed09f95739df 153 // before sending commands. Arduino can turn on way befer 4.5V so we'll wait 50
vtraveller 3:ed09f95739df 154 delayMicroseconds(50000);
vtraveller 3:ed09f95739df 155 // Now we pull both RS and R/W low to begin commands
vtraveller 3:ed09f95739df 156 _digitalWrite(_rs_pin, LOW);
vtraveller 3:ed09f95739df 157 _digitalWrite(_enable_pin, LOW);
vtraveller 3:ed09f95739df 158 if (_rw_pin != 255) {
vtraveller 3:ed09f95739df 159 _digitalWrite(_rw_pin, LOW);
vtraveller 3:ed09f95739df 160 }
vtraveller 3:ed09f95739df 161
vtraveller 3:ed09f95739df 162 //put the LCD into 4 bit or 8 bit mode
vtraveller 3:ed09f95739df 163 if (! (_displayfunction & LCD_8BITMODE)) {
vtraveller 3:ed09f95739df 164 // this is according to the hitachi HD44780 datasheet
vtraveller 3:ed09f95739df 165 // figure 24, pg 46
vtraveller 3:ed09f95739df 166
vtraveller 3:ed09f95739df 167 // we start in 8bit mode, try to set 4 bit mode
vtraveller 3:ed09f95739df 168 write4bits(0x03);
vtraveller 3:ed09f95739df 169 delayMicroseconds(4500); // wait min 4.1ms
vtraveller 3:ed09f95739df 170
vtraveller 3:ed09f95739df 171 // second try
vtraveller 3:ed09f95739df 172 write4bits(0x03);
vtraveller 3:ed09f95739df 173 delayMicroseconds(4500); // wait min 4.1ms
vtraveller 3:ed09f95739df 174
vtraveller 3:ed09f95739df 175 // third go!
vtraveller 3:ed09f95739df 176 write4bits(0x03);
vtraveller 3:ed09f95739df 177 delayMicroseconds(150);
vtraveller 3:ed09f95739df 178
vtraveller 3:ed09f95739df 179 // finally, set to 8-bit interface
vtraveller 3:ed09f95739df 180 write4bits(0x02);
vtraveller 3:ed09f95739df 181 } else {
vtraveller 3:ed09f95739df 182 // this is according to the hitachi HD44780 datasheet
vtraveller 3:ed09f95739df 183 // page 45 figure 23
vtraveller 3:ed09f95739df 184
vtraveller 3:ed09f95739df 185 // Send function set command sequence
vtraveller 3:ed09f95739df 186 command(LCD_FUNCTIONSET | _displayfunction);
vtraveller 3:ed09f95739df 187 delayMicroseconds(4500); // wait more than 4.1ms
vtraveller 3:ed09f95739df 188
vtraveller 3:ed09f95739df 189 // second try
vtraveller 3:ed09f95739df 190 command(LCD_FUNCTIONSET | _displayfunction);
vtraveller 3:ed09f95739df 191 delayMicroseconds(150);
vtraveller 3:ed09f95739df 192
vtraveller 3:ed09f95739df 193 // third go
vtraveller 3:ed09f95739df 194 command(LCD_FUNCTIONSET | _displayfunction);
vtraveller 3:ed09f95739df 195 }
vtraveller 3:ed09f95739df 196
vtraveller 3:ed09f95739df 197 // finally, set # lines, font size, etc.
vtraveller 3:ed09f95739df 198 command(LCD_FUNCTIONSET | _displayfunction);
vtraveller 3:ed09f95739df 199
vtraveller 3:ed09f95739df 200 // turn the display on with no cursor or blinking default
vtraveller 3:ed09f95739df 201 _displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;
vtraveller 3:ed09f95739df 202 display();
vtraveller 3:ed09f95739df 203
vtraveller 3:ed09f95739df 204 // clear it off
vtraveller 3:ed09f95739df 205 clear();
vtraveller 3:ed09f95739df 206
vtraveller 3:ed09f95739df 207 // Initialize to default text direction (for romance languages)
vtraveller 3:ed09f95739df 208 _displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
vtraveller 3:ed09f95739df 209 // set the entry mode
vtraveller 3:ed09f95739df 210 command(LCD_ENTRYMODESET | _displaymode);
vtraveller 3:ed09f95739df 211
vtraveller 3:ed09f95739df 212 }
vtraveller 3:ed09f95739df 213
vtraveller 3:ed09f95739df 214 /********** high level commands, for the user! */
vtraveller 3:ed09f95739df 215 void Adafruit_RGBLCDShield::clear()
vtraveller 3:ed09f95739df 216 {
vtraveller 3:ed09f95739df 217 command(LCD_CLEARDISPLAY); // clear display, set cursor position to zero
vtraveller 3:ed09f95739df 218 delayMicroseconds(2000); // this command takes a long time!
vtraveller 3:ed09f95739df 219 }
vtraveller 3:ed09f95739df 220
vtraveller 3:ed09f95739df 221 void Adafruit_RGBLCDShield::home()
vtraveller 3:ed09f95739df 222 {
vtraveller 3:ed09f95739df 223 command(LCD_RETURNHOME); // set cursor position to zero
vtraveller 3:ed09f95739df 224 delayMicroseconds(2000); // this command takes a long time!
vtraveller 3:ed09f95739df 225 }
vtraveller 3:ed09f95739df 226
vtraveller 3:ed09f95739df 227 void Adafruit_RGBLCDShield::setCursor(uint8_t col, uint8_t row)
vtraveller 3:ed09f95739df 228 {
vtraveller 3:ed09f95739df 229 int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
vtraveller 3:ed09f95739df 230 if ( row > _numlines ) {
vtraveller 3:ed09f95739df 231 row = _numlines-1; // we count rows starting w/0
vtraveller 3:ed09f95739df 232 }
vtraveller 3:ed09f95739df 233
vtraveller 3:ed09f95739df 234 command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
vtraveller 3:ed09f95739df 235 }
vtraveller 3:ed09f95739df 236
vtraveller 3:ed09f95739df 237 // Turn the display on/off (quickly)
vtraveller 3:ed09f95739df 238 void Adafruit_RGBLCDShield::noDisplay() {
vtraveller 3:ed09f95739df 239 _displaycontrol &= ~LCD_DISPLAYON;
vtraveller 3:ed09f95739df 240 command(LCD_DISPLAYCONTROL | _displaycontrol);
vtraveller 3:ed09f95739df 241 }
vtraveller 3:ed09f95739df 242 void Adafruit_RGBLCDShield::display() {
vtraveller 3:ed09f95739df 243 _displaycontrol |= LCD_DISPLAYON;
vtraveller 3:ed09f95739df 244 command(LCD_DISPLAYCONTROL | _displaycontrol);
vtraveller 3:ed09f95739df 245 }
vtraveller 3:ed09f95739df 246
vtraveller 3:ed09f95739df 247 // Turns the underline cursor on/off
vtraveller 3:ed09f95739df 248 void Adafruit_RGBLCDShield::noCursor() {
vtraveller 3:ed09f95739df 249 _displaycontrol &= ~LCD_CURSORON;
vtraveller 3:ed09f95739df 250 command(LCD_DISPLAYCONTROL | _displaycontrol);
vtraveller 3:ed09f95739df 251 }
vtraveller 3:ed09f95739df 252 void Adafruit_RGBLCDShield::cursor() {
vtraveller 3:ed09f95739df 253 _displaycontrol |= LCD_CURSORON;
vtraveller 3:ed09f95739df 254 command(LCD_DISPLAYCONTROL | _displaycontrol);
vtraveller 3:ed09f95739df 255 }
vtraveller 3:ed09f95739df 256
vtraveller 3:ed09f95739df 257 // Turn on and off the blinking cursor
vtraveller 3:ed09f95739df 258 void Adafruit_RGBLCDShield::noBlink() {
vtraveller 3:ed09f95739df 259 _displaycontrol &= ~LCD_BLINKON;
vtraveller 3:ed09f95739df 260 command(LCD_DISPLAYCONTROL | _displaycontrol);
vtraveller 3:ed09f95739df 261 }
vtraveller 3:ed09f95739df 262 void Adafruit_RGBLCDShield::blink() {
vtraveller 3:ed09f95739df 263 _displaycontrol |= LCD_BLINKON;
vtraveller 3:ed09f95739df 264 command(LCD_DISPLAYCONTROL | _displaycontrol);
vtraveller 3:ed09f95739df 265 }
vtraveller 3:ed09f95739df 266
vtraveller 3:ed09f95739df 267 // These commands scroll the display without changing the RAM
vtraveller 3:ed09f95739df 268 void Adafruit_RGBLCDShield::scrollDisplayLeft(void) {
vtraveller 3:ed09f95739df 269 command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
vtraveller 3:ed09f95739df 270 }
vtraveller 3:ed09f95739df 271 void Adafruit_RGBLCDShield::scrollDisplayRight(void) {
vtraveller 3:ed09f95739df 272 command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
vtraveller 3:ed09f95739df 273 }
vtraveller 3:ed09f95739df 274
vtraveller 3:ed09f95739df 275 // This is for text that flows Left to Right
vtraveller 3:ed09f95739df 276 void Adafruit_RGBLCDShield::leftToRight(void) {
vtraveller 3:ed09f95739df 277 _displaymode |= LCD_ENTRYLEFT;
vtraveller 3:ed09f95739df 278 command(LCD_ENTRYMODESET | _displaymode);
vtraveller 3:ed09f95739df 279 }
vtraveller 3:ed09f95739df 280
vtraveller 3:ed09f95739df 281 // This is for text that flows Right to Left
vtraveller 3:ed09f95739df 282 void Adafruit_RGBLCDShield::rightToLeft(void) {
vtraveller 3:ed09f95739df 283 _displaymode &= ~LCD_ENTRYLEFT;
vtraveller 3:ed09f95739df 284 command(LCD_ENTRYMODESET | _displaymode);
vtraveller 3:ed09f95739df 285 }
vtraveller 3:ed09f95739df 286
vtraveller 3:ed09f95739df 287 // This will 'right justify' text from the cursor
vtraveller 3:ed09f95739df 288 void Adafruit_RGBLCDShield::autoscroll(void) {
vtraveller 3:ed09f95739df 289 _displaymode |= LCD_ENTRYSHIFTINCREMENT;
vtraveller 3:ed09f95739df 290 command(LCD_ENTRYMODESET | _displaymode);
vtraveller 3:ed09f95739df 291 }
vtraveller 3:ed09f95739df 292
vtraveller 3:ed09f95739df 293 // This will 'left justify' text from the cursor
vtraveller 3:ed09f95739df 294 void Adafruit_RGBLCDShield::noAutoscroll(void) {
vtraveller 3:ed09f95739df 295 _displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
vtraveller 3:ed09f95739df 296 command(LCD_ENTRYMODESET | _displaymode);
vtraveller 3:ed09f95739df 297 }
vtraveller 3:ed09f95739df 298
vtraveller 3:ed09f95739df 299 // Allows us to fill the first 8 CGRAM locations
vtraveller 3:ed09f95739df 300 // with custom characters
vtraveller 3:ed09f95739df 301 void Adafruit_RGBLCDShield::createChar(uint8_t location, uint8_t charmap[]) {
vtraveller 3:ed09f95739df 302 location &= 0x7; // we only have 8 locations 0-7
vtraveller 3:ed09f95739df 303 command(LCD_SETCGRAMADDR | (location << 3));
vtraveller 3:ed09f95739df 304 for (int i=0; i<8; i++) {
vtraveller 3:ed09f95739df 305 write(charmap[i]);
vtraveller 3:ed09f95739df 306 }
vtraveller 3:ed09f95739df 307 command(LCD_SETDDRAMADDR); // unfortunately resets the location to 0,0
vtraveller 3:ed09f95739df 308 }
vtraveller 3:ed09f95739df 309
vtraveller 3:ed09f95739df 310 /*********** mid level commands, for sending data/cmds */
vtraveller 3:ed09f95739df 311
vtraveller 3:ed09f95739df 312 inline void Adafruit_RGBLCDShield::command(uint8_t value) {
vtraveller 3:ed09f95739df 313 send(value, LOW);
vtraveller 3:ed09f95739df 314 }
vtraveller 3:ed09f95739df 315
vtraveller 3:ed09f95739df 316 #if ARDUINO >= 100
vtraveller 3:ed09f95739df 317 inline size_t Adafruit_RGBLCDShield::write(uint8_t value) {
vtraveller 3:ed09f95739df 318 send(value, HIGH);
vtraveller 3:ed09f95739df 319 return 1;
vtraveller 3:ed09f95739df 320 }
vtraveller 3:ed09f95739df 321 #else
vtraveller 3:ed09f95739df 322 inline void Adafruit_RGBLCDShield::write(uint8_t value) {
vtraveller 3:ed09f95739df 323 send(value, HIGH);
vtraveller 3:ed09f95739df 324 }
vtraveller 3:ed09f95739df 325 #endif
vtraveller 3:ed09f95739df 326
vtraveller 3:ed09f95739df 327 /************ low level data pushing commands **********/
vtraveller 3:ed09f95739df 328
vtraveller 3:ed09f95739df 329 // little wrapper for i/o writes
vtraveller 3:ed09f95739df 330 void Adafruit_RGBLCDShield::_digitalWrite(uint8_t p, uint8_t d) {
vtraveller 3:ed09f95739df 331 if (_i2cAddr != 255) {
vtraveller 3:ed09f95739df 332 // an i2c command
vtraveller 3:ed09f95739df 333 _i2c.digitalWrite(p, d);
vtraveller 3:ed09f95739df 334 } else {
vtraveller 3:ed09f95739df 335 // straightup IO
vtraveller 3:ed09f95739df 336 digitalWrite(p, d);
vtraveller 3:ed09f95739df 337 }
vtraveller 3:ed09f95739df 338 }
vtraveller 3:ed09f95739df 339
vtraveller 3:ed09f95739df 340 // Allows to set the backlight, if the LCD backpack is used
vtraveller 3:ed09f95739df 341 void Adafruit_RGBLCDShield::setBacklight(uint8_t status) {
vtraveller 3:ed09f95739df 342 // check if i2c or SPI
vtraveller 3:ed09f95739df 343 _i2c.digitalWrite(8, ~(status >> 2) & 0x1);
vtraveller 3:ed09f95739df 344 _i2c.digitalWrite(7, ~(status >> 1) & 0x1);
vtraveller 3:ed09f95739df 345 _i2c.digitalWrite(6, ~status & 0x1);
vtraveller 3:ed09f95739df 346 }
vtraveller 3:ed09f95739df 347
vtraveller 3:ed09f95739df 348 // little wrapper for i/o directions
vtraveller 3:ed09f95739df 349 void Adafruit_RGBLCDShield::_pinMode(uint8_t p, uint8_t d) {
vtraveller 3:ed09f95739df 350 if (_i2cAddr != 255) {
vtraveller 3:ed09f95739df 351 // an i2c command
vtraveller 3:ed09f95739df 352 _i2c.pinMode(p, d);
vtraveller 3:ed09f95739df 353 } else {
vtraveller 3:ed09f95739df 354 // straightup IO
vtraveller 3:ed09f95739df 355 pinMode(p, d);
vtraveller 3:ed09f95739df 356 }
vtraveller 3:ed09f95739df 357 }
vtraveller 3:ed09f95739df 358
vtraveller 3:ed09f95739df 359 // write either command or data, with automatic 4/8-bit selection
vtraveller 3:ed09f95739df 360 void Adafruit_RGBLCDShield::send(uint8_t value, uint8_t mode) {
vtraveller 3:ed09f95739df 361 _digitalWrite(_rs_pin, mode);
vtraveller 3:ed09f95739df 362
vtraveller 3:ed09f95739df 363 // if there is a RW pin indicated, set it low to Write
vtraveller 3:ed09f95739df 364 if (_rw_pin != 255) {
vtraveller 3:ed09f95739df 365 _digitalWrite(_rw_pin, LOW);
vtraveller 3:ed09f95739df 366 }
vtraveller 3:ed09f95739df 367
vtraveller 3:ed09f95739df 368 if (_displayfunction & LCD_8BITMODE) {
vtraveller 3:ed09f95739df 369 write8bits(value);
vtraveller 3:ed09f95739df 370 } else {
vtraveller 3:ed09f95739df 371 write4bits(value>>4);
vtraveller 3:ed09f95739df 372 write4bits(value);
vtraveller 3:ed09f95739df 373 }
vtraveller 3:ed09f95739df 374 }
vtraveller 3:ed09f95739df 375
vtraveller 3:ed09f95739df 376 void Adafruit_RGBLCDShield::pulseEnable(void) {
vtraveller 3:ed09f95739df 377 _digitalWrite(_enable_pin, LOW);
vtraveller 3:ed09f95739df 378 delayMicroseconds(1);
vtraveller 3:ed09f95739df 379 _digitalWrite(_enable_pin, HIGH);
vtraveller 3:ed09f95739df 380 delayMicroseconds(1); // enable pulse must be >450ns
vtraveller 3:ed09f95739df 381 _digitalWrite(_enable_pin, LOW);
vtraveller 3:ed09f95739df 382 delayMicroseconds(100); // commands need > 37us to settle
vtraveller 3:ed09f95739df 383 }
vtraveller 3:ed09f95739df 384
vtraveller 3:ed09f95739df 385 void Adafruit_RGBLCDShield::write4bits(uint8_t value) {
vtraveller 3:ed09f95739df 386 if (_i2cAddr != 255) {
vtraveller 3:ed09f95739df 387 uint16_t out = 0;
vtraveller 3:ed09f95739df 388
vtraveller 3:ed09f95739df 389 out = _i2c.readGPIOAB();
vtraveller 3:ed09f95739df 390
vtraveller 3:ed09f95739df 391 // speed up for i2c since its sluggish
vtraveller 3:ed09f95739df 392 for (int i = 0; i < 4; i++) {
vtraveller 3:ed09f95739df 393 out &= ~(1 << _data_pins[i]);
vtraveller 3:ed09f95739df 394 out |= ((value >> i) & 0x1) << _data_pins[i];
vtraveller 3:ed09f95739df 395 }
vtraveller 3:ed09f95739df 396
vtraveller 3:ed09f95739df 397 // make sure enable is low
vtraveller 3:ed09f95739df 398 out &= ~(1 << _enable_pin);
vtraveller 3:ed09f95739df 399
vtraveller 3:ed09f95739df 400 _i2c.writeGPIOAB(out);
vtraveller 3:ed09f95739df 401
vtraveller 3:ed09f95739df 402 // pulse enable
vtraveller 3:ed09f95739df 403 delayMicroseconds(1);
vtraveller 3:ed09f95739df 404 out |= (1 << _enable_pin);
vtraveller 3:ed09f95739df 405 _i2c.writeGPIOAB(out);
vtraveller 3:ed09f95739df 406 delayMicroseconds(1);
vtraveller 3:ed09f95739df 407 out &= ~(1 << _enable_pin);
vtraveller 3:ed09f95739df 408 _i2c.writeGPIOAB(out);
vtraveller 3:ed09f95739df 409 delayMicroseconds(100);
vtraveller 3:ed09f95739df 410
vtraveller 3:ed09f95739df 411 } else {
vtraveller 3:ed09f95739df 412 for (int i = 0; i < 4; i++) {
vtraveller 3:ed09f95739df 413 _pinMode(_data_pins[i], OUTPUT);
vtraveller 3:ed09f95739df 414 _digitalWrite(_data_pins[i], (value >> i) & 0x01);
vtraveller 3:ed09f95739df 415 }
vtraveller 3:ed09f95739df 416 pulseEnable();
vtraveller 3:ed09f95739df 417 }
vtraveller 3:ed09f95739df 418 }
vtraveller 3:ed09f95739df 419
vtraveller 3:ed09f95739df 420 void Adafruit_RGBLCDShield::write8bits(uint8_t value) {
vtraveller 3:ed09f95739df 421 for (int i = 0; i < 8; i++) {
vtraveller 3:ed09f95739df 422 _pinMode(_data_pins[i], OUTPUT);
vtraveller 3:ed09f95739df 423 _digitalWrite(_data_pins[i], (value >> i) & 0x01);
vtraveller 3:ed09f95739df 424 }
vtraveller 3:ed09f95739df 425
vtraveller 3:ed09f95739df 426 pulseEnable();
vtraveller 3:ed09f95739df 427 }
vtraveller 3:ed09f95739df 428
vtraveller 3:ed09f95739df 429 uint8_t Adafruit_RGBLCDShield::readButtons(void) {
vtraveller 3:ed09f95739df 430 uint8_t reply = 0x1F;
vtraveller 3:ed09f95739df 431
vtraveller 3:ed09f95739df 432 for (uint8_t i=0; i<5; i++) {
vtraveller 3:ed09f95739df 433 reply &= ~((_i2c.digitalRead(_button_pins[i])) << i);
vtraveller 3:ed09f95739df 434 }
vtraveller 3:ed09f95739df 435 return reply;
vtraveller 3:ed09f95739df 436 }