add Liquid Crystal I2C Library
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#include "LiquidCrystal_I2C.h"
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#include <inttypes.h>
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#include <Arduino.h>
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#include <Wire.h>
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// When the display powers up, it is configured as follows:
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//
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// 1. Display clear
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// 2. Function set:
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// DL = 1; 8-bit interface data
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// N = 0; 1-line display
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// F = 0; 5x8 dot character font
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// 3. Display on/off control:
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// D = 0; Display off
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// C = 0; Cursor off
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// B = 0; Blinking off
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// 4. Entry mode set:
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// I/D = 1; Increment by 1
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// S = 0; No shift
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//
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// Note, however, that resetting the Arduino doesn't reset the LCD, so we
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// can't assume that its in that state when a sketch starts (and the
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// LiquidCrystal constructor is called).
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LiquidCrystal_I2C::LiquidCrystal_I2C(uint8_t lcd_addr, uint8_t lcd_cols, uint8_t lcd_rows, uint8_t charsize)
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{
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_addr = lcd_addr;
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_cols = lcd_cols;
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_rows = lcd_rows;
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_charsize = charsize;
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_backlightval = LCD_BACKLIGHT;
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}
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void LiquidCrystal_I2C::begin() {
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Wire.begin();
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_displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
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if (_rows > 1) {
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_displayfunction |= LCD_2LINE;
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}
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// for some 1 line displays you can select a 10 pixel high font
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if ((_charsize != 0) && (_rows == 1)) {
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_displayfunction |= LCD_5x10DOTS;
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}
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// SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
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// according to datasheet, we need at least 40ms after power rises above 2.7V
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// before sending commands. Arduino can turn on way befer 4.5V so we'll wait 50
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delay(50);
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// Now we pull both RS and R/W low to begin commands
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expanderWrite(_backlightval); // reset expanderand turn backlight off (Bit 8 =1)
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delay(1000);
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//put the LCD into 4 bit mode
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// this is according to the hitachi HD44780 datasheet
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// figure 24, pg 46
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// we start in 8bit mode, try to set 4 bit mode
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write4bits(0x03 << 4);
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delayMicroseconds(4500); // wait min 4.1ms
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// second try
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write4bits(0x03 << 4);
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delayMicroseconds(4500); // wait min 4.1ms
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// third go!
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write4bits(0x03 << 4);
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delayMicroseconds(150);
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// finally, set to 4-bit interface
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write4bits(0x02 << 4);
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// set # lines, font size, etc.
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command(LCD_FUNCTIONSET | _displayfunction);
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// turn the display on with no cursor or blinking default
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_displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;
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display();
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// clear it off
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clear();
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// Initialize to default text direction (for roman languages)
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_displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
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// set the entry mode
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command(LCD_ENTRYMODESET | _displaymode);
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home();
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}
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/********** high level commands, for the user! */
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void LiquidCrystal_I2C::clear(){
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command(LCD_CLEARDISPLAY);// clear display, set cursor position to zero
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delayMicroseconds(2000); // this command takes a long time!
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}
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void LiquidCrystal_I2C::home(){
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command(LCD_RETURNHOME); // set cursor position to zero
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delayMicroseconds(2000); // this command takes a long time!
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}
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void LiquidCrystal_I2C::setCursor(uint8_t col, uint8_t row){
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int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
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if (row > _rows) {
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row = _rows-1; // we count rows starting w/0
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}
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command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
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}
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// Turn the display on/off (quickly)
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void LiquidCrystal_I2C::noDisplay() {
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_displaycontrol &= ~LCD_DISPLAYON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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void LiquidCrystal_I2C::display() {
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_displaycontrol |= LCD_DISPLAYON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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// Turns the underline cursor on/off
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void LiquidCrystal_I2C::noCursor() {
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_displaycontrol &= ~LCD_CURSORON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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void LiquidCrystal_I2C::cursor() {
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_displaycontrol |= LCD_CURSORON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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// Turn on and off the blinking cursor
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void LiquidCrystal_I2C::noBlink() {
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_displaycontrol &= ~LCD_BLINKON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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void LiquidCrystal_I2C::blink() {
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_displaycontrol |= LCD_BLINKON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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// These commands scroll the display without changing the RAM
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void LiquidCrystal_I2C::scrollDisplayLeft(void) {
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command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
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}
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void LiquidCrystal_I2C::scrollDisplayRight(void) {
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command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
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}
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// This is for text that flows Left to Right
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void LiquidCrystal_I2C::leftToRight(void) {
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_displaymode |= LCD_ENTRYLEFT;
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command(LCD_ENTRYMODESET | _displaymode);
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}
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// This is for text that flows Right to Left
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void LiquidCrystal_I2C::rightToLeft(void) {
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_displaymode &= ~LCD_ENTRYLEFT;
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command(LCD_ENTRYMODESET | _displaymode);
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}
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// This will 'right justify' text from the cursor
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void LiquidCrystal_I2C::autoscroll(void) {
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_displaymode |= LCD_ENTRYSHIFTINCREMENT;
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command(LCD_ENTRYMODESET | _displaymode);
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}
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// This will 'left justify' text from the cursor
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void LiquidCrystal_I2C::noAutoscroll(void) {
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_displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
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command(LCD_ENTRYMODESET | _displaymode);
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}
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// Allows us to fill the first 8 CGRAM locations
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// with custom characters
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void LiquidCrystal_I2C::createChar(uint8_t location, uint8_t charmap[]) {
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location &= 0x7; // we only have 8 locations 0-7
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command(LCD_SETCGRAMADDR | (location << 3));
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for (int i=0; i<8; i++) {
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write(charmap[i]);
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}
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}
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// Turn the (optional) backlight off/on
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void LiquidCrystal_I2C::noBacklight(void) {
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_backlightval=LCD_NOBACKLIGHT;
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expanderWrite(0);
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}
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void LiquidCrystal_I2C::backlight(void) {
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_backlightval=LCD_BACKLIGHT;
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expanderWrite(0);
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}
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bool LiquidCrystal_I2C::getBacklight() {
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return _backlightval == LCD_BACKLIGHT;
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}
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/*********** mid level commands, for sending data/cmds */
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inline void LiquidCrystal_I2C::command(uint8_t value) {
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send(value, 0);
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}
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inline size_t LiquidCrystal_I2C::write(uint8_t value) {
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send(value, Rs);
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return 1;
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}
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/************ low level data pushing commands **********/
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// write either command or data
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void LiquidCrystal_I2C::send(uint8_t value, uint8_t mode) {
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uint8_t highnib=value&0xf0;
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uint8_t lownib=(value<<4)&0xf0;
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write4bits((highnib)|mode);
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write4bits((lownib)|mode);
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}
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void LiquidCrystal_I2C::write4bits(uint8_t value) {
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expanderWrite(value);
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pulseEnable(value);
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}
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void LiquidCrystal_I2C::expanderWrite(uint8_t _data){
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Wire.beginTransmission(_addr);
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Wire.write((int)(_data) | _backlightval);
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Wire.endTransmission();
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}
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void LiquidCrystal_I2C::pulseEnable(uint8_t _data){
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expanderWrite(_data | En); // En high
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delayMicroseconds(1); // enable pulse must be >450ns
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expanderWrite(_data & ~En); // En low
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delayMicroseconds(50); // commands need > 37us to settle
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}
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void LiquidCrystal_I2C::load_custom_character(uint8_t char_num, uint8_t *rows){
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createChar(char_num, rows);
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}
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void LiquidCrystal_I2C::setBacklight(uint8_t new_val){
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if (new_val) {
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backlight(); // turn backlight on
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} else {
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noBacklight(); // turn backlight off
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}
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}
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void LiquidCrystal_I2C::printstr(const char c[]){
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//This function is not identical to the function used for "real" I2C displays
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//it's here so the user sketch doesn't have to be changed
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print(c);
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}
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#ifndef FDB_LIQUID_CRYSTAL_I2C_H
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#define FDB_LIQUID_CRYSTAL_I2C_H
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#include <inttypes.h>
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#include <Print.h>
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// commands
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#define LCD_CLEARDISPLAY 0x01
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#define LCD_RETURNHOME 0x02
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#define LCD_ENTRYMODESET 0x04
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#define LCD_DISPLAYCONTROL 0x08
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#define LCD_CURSORSHIFT 0x10
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#define LCD_FUNCTIONSET 0x20
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#define LCD_SETCGRAMADDR 0x40
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#define LCD_SETDDRAMADDR 0x80
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// flags for display entry mode
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#define LCD_ENTRYRIGHT 0x00
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#define LCD_ENTRYLEFT 0x02
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#define LCD_ENTRYSHIFTINCREMENT 0x01
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#define LCD_ENTRYSHIFTDECREMENT 0x00
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// flags for display on/off control
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#define LCD_DISPLAYON 0x04
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#define LCD_DISPLAYOFF 0x00
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#define LCD_CURSORON 0x02
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#define LCD_CURSOROFF 0x00
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#define LCD_BLINKON 0x01
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#define LCD_BLINKOFF 0x00
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// flags for display/cursor shift
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#define LCD_DISPLAYMOVE 0x08
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#define LCD_CURSORMOVE 0x00
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#define LCD_MOVERIGHT 0x04
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#define LCD_MOVELEFT 0x00
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// flags for function set
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#define LCD_8BITMODE 0x10
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#define LCD_4BITMODE 0x00
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#define LCD_2LINE 0x08
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#define LCD_1LINE 0x00
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#define LCD_5x10DOTS 0x04
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#define LCD_5x8DOTS 0x00
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// flags for backlight control
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#define LCD_BACKLIGHT 0x08
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#define LCD_NOBACKLIGHT 0x00
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#define En B00000100 // Enable bit
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#define Rw B00000010 // Read/Write bit
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#define Rs B00000001 // Register select bit
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/**
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* This is the driver for the Liquid Crystal LCD displays that use the I2C bus.
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*
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* After creating an instance of this class, first call begin() before anything else.
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* The backlight is on by default, since that is the most likely operating mode in
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* most cases.
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*/
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class LiquidCrystal_I2C : public Print {
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public:
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/**
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* Constructor
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*
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* @param lcd_addr I2C slave address of the LCD display. Most likely printed on the
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* LCD circuit board, or look in the supplied LCD documentation.
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* @param lcd_cols Number of columns your LCD display has.
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* @param lcd_rows Number of rows your LCD display has.
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* @param charsize The size in dots that the display has, use LCD_5x10DOTS or LCD_5x8DOTS.
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*/
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LiquidCrystal_I2C(uint8_t lcd_addr, uint8_t lcd_cols, uint8_t lcd_rows, uint8_t charsize = LCD_5x8DOTS);
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/**
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* Set the LCD display in the correct begin state, must be called before anything else is done.
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*/
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void begin();
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/**
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* Remove all the characters currently shown. Next print/write operation will start
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* from the first position on LCD display.
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*/
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void clear();
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/**
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* Next print/write operation will will start from the first position on the LCD display.
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*/
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void home();
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/**
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* Do not show any characters on the LCD display. Backlight state will remain unchanged.
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* Also all characters written on the display will return, when the display in enabled again.
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*/
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void noDisplay();
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/**
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* Show the characters on the LCD display, this is the normal behaviour. This method should
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* only be used after noDisplay() has been used.
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*/
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void display();
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/**
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* Do not blink the cursor indicator.
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*/
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void noBlink();
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/**
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* Start blinking the cursor indicator.
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*/
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void blink();
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/**
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* Do not show a cursor indicator.
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*/
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void noCursor();
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/**
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* Show a cursor indicator, cursor can blink on not blink. Use the
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* methods blink() and noBlink() for changing cursor blink.
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*/
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void cursor();
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void scrollDisplayLeft();
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void scrollDisplayRight();
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void printLeft();
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void printRight();
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void leftToRight();
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void rightToLeft();
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void shiftIncrement();
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void shiftDecrement();
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void noBacklight();
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void backlight();
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bool getBacklight();
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void autoscroll();
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void noAutoscroll();
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void createChar(uint8_t, uint8_t[]);
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void setCursor(uint8_t, uint8_t);
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virtual size_t write(uint8_t);
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void command(uint8_t);
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inline void blink_on() { blink(); }
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inline void blink_off() { noBlink(); }
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inline void cursor_on() { cursor(); }
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inline void cursor_off() { noCursor(); }
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// Compatibility API function aliases
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void setBacklight(uint8_t new_val); // alias for backlight() and nobacklight()
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void load_custom_character(uint8_t char_num, uint8_t *rows); // alias for createChar()
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void printstr(const char[]);
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private:
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void send(uint8_t, uint8_t);
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void write4bits(uint8_t);
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void expanderWrite(uint8_t);
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void pulseEnable(uint8_t);
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uint8_t _addr;
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uint8_t _displayfunction;
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uint8_t _displaycontrol;
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uint8_t _displaymode;
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uint8_t _cols;
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uint8_t _rows;
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uint8_t _charsize;
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uint8_t _backlightval;
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};
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#endif // FDB_LIQUID_CRYSTAL_I2C_H
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# Installation #
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Create a new folder called "LiquidCrystal_I2C" under the folder named "libraries" in your Arduino sketchbook folder.
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Create the folder "libraries" in case it does not exist yet. Place all the files in the "LiquidCrystal_I2C" folder.
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# Usage #
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To use the library in your own sketch, select it from *Sketch > Import Library*.
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-------------------------------------------------------------------------------------------------------------------
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This library is based on work done by DFROBOT (www.dfrobot.com).
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#include <Wire.h>
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#include <LiquidCrystal_I2C.h>
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// Set the LCD address to 0x27 for a 16 chars and 2 line display
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LiquidCrystal_I2C lcd(0x27, 16, 2);
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void setup()
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{
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// initialize the LCD
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lcd.begin();
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}
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void loop()
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{
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bool blinking = true;
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lcd.cursor();
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while (1) {
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if (blinking) {
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lcd.clear();
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lcd.print("No cursor blink");
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lcd.noBlink();
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blinking = false;
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} else {
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lcd.clear();
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lcd.print("Cursor blink");
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lcd.blink();
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blinking = true;
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}
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delay(4000);
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}
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}
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#include <Wire.h>
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#include <LiquidCrystal_I2C.h>
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uint8_t bell[8] = {0x4, 0xe, 0xe, 0xe, 0x1f, 0x0, 0x4};
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uint8_t note[8] = {0x2, 0x3, 0x2, 0xe, 0x1e, 0xc, 0x0};
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uint8_t clock[8] = {0x0, 0xe, 0x15, 0x17, 0x11, 0xe, 0x0};
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uint8_t heart[8] = {0x0, 0xa, 0x1f, 0x1f, 0xe, 0x4, 0x0};
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uint8_t duck[8] = {0x0, 0xc, 0x1d, 0xf, 0xf, 0x6, 0x0};
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uint8_t check[8] = {0x0, 0x1 ,0x3, 0x16, 0x1c, 0x8, 0x0};
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uint8_t cross[8] = {0x0, 0x1b, 0xe, 0x4, 0xe, 0x1b, 0x0};
|
||||
uint8_t retarrow[8] = { 0x1, 0x1, 0x5, 0x9, 0x1f, 0x8, 0x4};
|
||||
|
||||
// Set the LCD address to 0x27 for a 16 chars and 2 line display
|
||||
LiquidCrystal_I2C lcd(0x27, 16, 2);
|
||||
|
||||
void setup()
|
||||
{
|
||||
lcd.begin();
|
||||
lcd.backlight();
|
||||
|
||||
lcd.createChar(0, bell);
|
||||
lcd.createChar(1, note);
|
||||
lcd.createChar(2, clock);
|
||||
lcd.createChar(3, heart);
|
||||
lcd.createChar(4, duck);
|
||||
lcd.createChar(5, check);
|
||||
lcd.createChar(6, cross);
|
||||
lcd.createChar(7, retarrow);
|
||||
lcd.home();
|
||||
|
||||
lcd.print("Hello world...");
|
||||
lcd.setCursor(0, 1);
|
||||
lcd.print(" i ");
|
||||
lcd.write(3);
|
||||
lcd.print(" arduinos!");
|
||||
delay(5000);
|
||||
displayKeyCodes();
|
||||
}
|
||||
|
||||
// display all keycodes
|
||||
void displayKeyCodes(void) {
|
||||
uint8_t i = 0;
|
||||
|
||||
while (1) {
|
||||
lcd.clear();
|
||||
lcd.print("Codes 0x");
|
||||
lcd.print(i, HEX);
|
||||
lcd.print("-0x");
|
||||
lcd.print(i + 16, HEX);
|
||||
lcd.setCursor(0, 1);
|
||||
|
||||
for (int j = 0; j < 16; j++) {
|
||||
lcd.write(i + j);
|
||||
}
|
||||
i += 16;
|
||||
|
||||
delay(4000);
|
||||
}
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
// Do nothing here...
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
#include <Wire.h>
|
||||
#include <LiquidCrystal_I2C.h>
|
||||
|
||||
// Set the LCD address to 0x27 for a 16 chars and 2 line display
|
||||
LiquidCrystal_I2C lcd(0x27, 16, 2);
|
||||
|
||||
void setup()
|
||||
{
|
||||
// initialize the LCD
|
||||
lcd.begin();
|
||||
|
||||
// Turn on the blacklight and print a message.
|
||||
lcd.backlight();
|
||||
lcd.print("Hello, world!");
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
// Do nothing here...
|
||||
}
|
||||
|
|
@ -0,0 +1,34 @@
|
|||
/**
|
||||
* Displays text sent over the serial port (e.g. from the Serial Monitor) on
|
||||
* an attached LCD.
|
||||
*/
|
||||
#include <Wire.h>
|
||||
#include <LiquidCrystal_I2C.h>
|
||||
|
||||
// Set the LCD address to 0x27 for a 16 chars and 2 line display
|
||||
LiquidCrystal_I2C lcd(0x27, 16, 2);
|
||||
|
||||
void setup()
|
||||
{
|
||||
lcd.begin();
|
||||
lcd.backlight();
|
||||
|
||||
// Initialize the serial port at a speed of 9600 baud
|
||||
Serial.begin(9600);
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
// If characters arrived over the serial port...
|
||||
if (Serial.available()) {
|
||||
// Wait a bit for the entire message to arrive
|
||||
delay(100);
|
||||
// Clear the screen
|
||||
lcd.clear();
|
||||
|
||||
// Write all characters received with the serial port to the LCD.
|
||||
while (Serial.available() > 0) {
|
||||
lcd.write(Serial.read());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,46 @@
|
|||
###########################################
|
||||
# Syntax Coloring Map For LiquidCrystal_I2C
|
||||
###########################################
|
||||
|
||||
###########################################
|
||||
# Datatypes (KEYWORD1)
|
||||
###########################################
|
||||
|
||||
LiquidCrystal_I2C KEYWORD1
|
||||
|
||||
###########################################
|
||||
# Methods and Functions (KEYWORD2)
|
||||
###########################################
|
||||
init KEYWORD2
|
||||
begin KEYWORD2
|
||||
clear KEYWORD2
|
||||
home KEYWORD2
|
||||
noDisplay KEYWORD2
|
||||
display KEYWORD2
|
||||
noBlink KEYWORD2
|
||||
blink KEYWORD2
|
||||
noCursor KEYWORD2
|
||||
cursor KEYWORD2
|
||||
scrollDisplayLeft KEYWORD2
|
||||
scrollDisplayRight KEYWORD2
|
||||
leftToRight KEYWORD2
|
||||
rightToLeft KEYWORD2
|
||||
shiftIncrement KEYWORD2
|
||||
shiftDecrement KEYWORD2
|
||||
noBacklight KEYWORD2
|
||||
backlight KEYWORD2
|
||||
autoscroll KEYWORD2
|
||||
noAutoscroll KEYWORD2
|
||||
createChar KEYWORD2
|
||||
setCursor KEYWORD2
|
||||
print KEYWORD2
|
||||
blink_on KEYWORD2
|
||||
blink_off KEYWORD2
|
||||
cursor_on KEYWORD2
|
||||
cursor_off KEYWORD2
|
||||
setBacklight KEYWORD2
|
||||
load_custom_character KEYWORD2
|
||||
printstr KEYWORD2
|
||||
###########################################
|
||||
# Constants (LITERAL1)
|
||||
###########################################
|
||||
Loading…
Reference in New Issue