Attachment 200732 Details for Bug 234585 – the irrelevant AVR CPP code

the irrelevant AVR CPP code

LiquidCrystal_I2C.cpp (text/plain), 8.39 KB, created by Niko on 2019-01-02 23:31:48 UTC

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Creator: Niko

Created: 2019-01-02 23:31:48 UTC

Size: 8.39 KB

patch

obsolete

>// Based on the work by DFRobot
>
>#include "LiquidCrystal_I2C.h"
>#include <inttypes.h>
>#if defined(ARDUINO) && ARDUINO >= 100
>
>#include "Arduino.h"
>
>#define printIIC(args)	Wire.write(args)
>inline size_t LiquidCrystal_I2C::write(uint8_t value) {
>	send(value, Rs);
>	return 1;
>}
>
>#else
>#include "WProgram.h"
>
>#define printIIC(args)	Wire.send(args)
>inline void LiquidCrystal_I2C::write(uint8_t value) {
>	send(value, Rs);
>}
>
>#endif
>#include "Wire.h"
>
>
>
>// When the display powers up, it is configured as follows:
>//
>// 1. Display clear
>// 2. Function set: 
>//    DL = 1; 8-bit interface data 
>//    N = 0; 1-line display 
>//    F = 0; 5x8 dot character font 
>// 3. Display on/off control: 
>//    D = 0; Display off 
>//    C = 0; Cursor off 
>//    B = 0; Blinking off 
>// 4. Entry mode set: 
>//    I/D = 1; Increment by 1
>//    S = 0; No shift 
>//
>// Note, however, that resetting the Arduino doesn't reset the LCD, so we
>// can't assume that its in that state when a sketch starts (and the
>// LiquidCrystal constructor is called).
>
>LiquidCrystal_I2C::LiquidCrystal_I2C(uint8_t lcd_Addr,uint8_t lcd_cols,uint8_t lcd_rows)
>{
>  _Addr = lcd_Addr;
>  _cols = lcd_cols;
>  _rows = lcd_rows;
>  _backlightval = LCD_NOBACKLIGHT;
>}
>
>void LiquidCrystal_I2C::init(){
>	init_priv();
>}
>
>void LiquidCrystal_I2C::init_priv()
>{
>	Wire.begin();
>	_displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
>	begin(_cols, _rows);  
>}
>
>void LiquidCrystal_I2C::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
>	if (lines > 1) {
>		_displayfunction |= LCD_2LINE;
>	}
>	_numlines = lines;
>
>	// for some 1 line displays you can select a 10 pixel high font
>	if ((dotsize != 0) && (lines == 1)) {
>		_displayfunction |= LCD_5x10DOTS;
>	}
>
>	// SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
>	// according to datasheet, we need at least 40ms after power rises above 2.7V
>	// before sending commands. Arduino can turn on way befer 4.5V so we'll wait 50
>	delay(50); 
>  
>	// Now we pull both RS and R/W low to begin commands
>	expanderWrite(_backlightval);	// reset expanderand turn backlight off (Bit 8 =1)
>	delay(1000);
>
>  	//put the LCD into 4 bit mode
>	// this is according to the hitachi HD44780 datasheet
>	// figure 24, pg 46
>	
>	  // we start in 8bit mode, try to set 4 bit mode
>   write4bits(0x03 << 4);
>   delayMicroseconds(4500); // wait min 4.1ms
>   
>   // second try
>   write4bits(0x03 << 4);
>   delayMicroseconds(4500); // wait min 4.1ms
>   
>   // third go!
>   write4bits(0x03 << 4); 
>   delayMicroseconds(150);
>   
>   // finally, set to 4-bit interface
>   write4bits(0x02 << 4); 
>
>
>	// set # lines, font size, etc.
>	command(LCD_FUNCTIONSET | _displayfunction);  
>	
>	// turn the display on with no cursor or blinking default
>	_displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;
>	display();
>	
>	// clear it off
>	clear();
>	
>	// Initialize to default text direction (for roman languages)
>	_displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
>	
>	// set the entry mode
>	command(LCD_ENTRYMODESET | _displaymode);
>	
>	home();
>  
>}
>
>/********** high level commands, for the user! */
>void LiquidCrystal_I2C::clear(){
>	command(LCD_CLEARDISPLAY);// clear display, set cursor position to zero
>	delayMicroseconds(2000);  // this command takes a long time!
>}
>
>void LiquidCrystal_I2C::home(){
>	command(LCD_RETURNHOME);  // set cursor position to zero
>	delayMicroseconds(2000);  // this command takes a long time!
>}
>
>void LiquidCrystal_I2C::setCursor(uint8_t col, uint8_t row){
>	int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
>	if ( row > (_numlines-1) ) {
>		row = _numlines-1;    // we count rows starting w/0
>	}
>	command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
>}
>
>// Turn the display on/off (quickly)
>void LiquidCrystal_I2C::noDisplay() {
>	_displaycontrol &= ~LCD_DISPLAYON;
>	command(LCD_DISPLAYCONTROL | _displaycontrol);
>}
>void LiquidCrystal_I2C::display() {
>	_displaycontrol |= LCD_DISPLAYON;
>	command(LCD_DISPLAYCONTROL | _displaycontrol);
>}
>
>// Turns the underline cursor on/off
>void LiquidCrystal_I2C::noCursor() {
>	_displaycontrol &= ~LCD_CURSORON;
>	command(LCD_DISPLAYCONTROL | _displaycontrol);
>}
>void LiquidCrystal_I2C::cursor() {
>	_displaycontrol |= LCD_CURSORON;
>	command(LCD_DISPLAYCONTROL | _displaycontrol);
>}
>
>// Turn on and off the blinking cursor
>void LiquidCrystal_I2C::noBlink() {
>	_displaycontrol &= ~LCD_BLINKON;
>	command(LCD_DISPLAYCONTROL | _displaycontrol);
>}
>void LiquidCrystal_I2C::blink() {
>	_displaycontrol |= LCD_BLINKON;
>	command(LCD_DISPLAYCONTROL | _displaycontrol);
>}
>
>// These commands scroll the display without changing the RAM
>void LiquidCrystal_I2C::scrollDisplayLeft(void) {
>	command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
>}
>void LiquidCrystal_I2C::scrollDisplayRight(void) {
>	command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
>}
>
>// This is for text that flows Left to Right
>void LiquidCrystal_I2C::leftToRight(void) {
>	_displaymode |= LCD_ENTRYLEFT;
>	command(LCD_ENTRYMODESET | _displaymode);
>}
>
>// This is for text that flows Right to Left
>void LiquidCrystal_I2C::rightToLeft(void) {
>	_displaymode &= ~LCD_ENTRYLEFT;
>	command(LCD_ENTRYMODESET | _displaymode);
>}
>
>// This will 'right justify' text from the cursor
>void LiquidCrystal_I2C::autoscroll(void) {
>	_displaymode |= LCD_ENTRYSHIFTINCREMENT;
>	command(LCD_ENTRYMODESET | _displaymode);
>}
>
>// This will 'left justify' text from the cursor
>void LiquidCrystal_I2C::noAutoscroll(void) {
>	_displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
>	command(LCD_ENTRYMODESET | _displaymode);
>}
>
>// Allows us to fill the first 8 CGRAM locations
>// with custom characters
>void LiquidCrystal_I2C::createChar(uint8_t location, uint8_t charmap[]) {
>	location &= 0x7; // we only have 8 locations 0-7
>	command(LCD_SETCGRAMADDR | (location << 3));
>	for (int i=0; i<8; i++) {
>		write(charmap[i]);
>	}
>}
>
>// Turn the (optional) backlight off/on
>void LiquidCrystal_I2C::noBacklight(void) {
>	_backlightval=LCD_NOBACKLIGHT;
>	expanderWrite(0);
>}
>
>void LiquidCrystal_I2C::backlight(void) {
>	_backlightval=LCD_BACKLIGHT;
>	expanderWrite(0);
>}
>
>
>
>/*********** mid level commands, for sending data/cmds */
>
>inline void LiquidCrystal_I2C::command(uint8_t value) {
>	send(value, 0);
>}
>
>
>/************ low level data pushing commands **********/
>
>// write either command or data
>void LiquidCrystal_I2C::send(uint8_t value, uint8_t mode) {
>	uint8_t highnib=value&0xf0;
>	uint8_t lownib=(value<<4)&0xf0;
>       write4bits((highnib)|mode);
>	write4bits((lownib)|mode); 
>}
>
>void LiquidCrystal_I2C::write4bits(uint8_t value) {
>	expanderWrite(value);
>	pulseEnable(value);
>}
>
>void LiquidCrystal_I2C::expanderWrite(uint8_t _data){                                        
>	Wire.beginTransmission(_Addr);
>	printIIC((int)(_data) | _backlightval);
>	Wire.endTransmission();   
>}
>
>void LiquidCrystal_I2C::pulseEnable(uint8_t _data){
>	expanderWrite(_data | En);	// En high
>	delayMicroseconds(1);		// enable pulse must be >450ns
>	
>	expanderWrite(_data & ~En);	// En low
>	delayMicroseconds(50);		// commands need > 37us to settle
>} 
>
>
>// Alias functions
>
>void LiquidCrystal_I2C::cursor_on(){
>	cursor();
>}
>
>void LiquidCrystal_I2C::cursor_off(){
>	noCursor();
>}
>
>void LiquidCrystal_I2C::blink_on(){
>	blink();
>}
>
>void LiquidCrystal_I2C::blink_off(){
>	noBlink();
>}
>
>void LiquidCrystal_I2C::load_custom_character(uint8_t char_num, uint8_t *rows){
>		createChar(char_num, rows);
>}
>
>void LiquidCrystal_I2C::setBacklight(uint8_t new_val){
>	if(new_val){
>		backlight();		// turn backlight on
>	}else{
>		noBacklight();		// turn backlight off
>	}
>}
>
>void LiquidCrystal_I2C::printstr(const char c[]){
>	//This function is not identical to the function used for "real" I2C displays
>	//it's here so the user sketch doesn't have to be changed 
>	print(c);
>}
>
>
>// unsupported API functions
>void LiquidCrystal_I2C::off(){}
>void LiquidCrystal_I2C::on(){}
>void LiquidCrystal_I2C::setDelay (int cmdDelay,int charDelay) {}
>uint8_t LiquidCrystal_I2C::status(){return 0;}
>uint8_t LiquidCrystal_I2C::keypad (){return 0;}
>uint8_t LiquidCrystal_I2C::init_bargraph(uint8_t graphtype){return 0;}
>void LiquidCrystal_I2C::draw_horizontal_graph(uint8_t row, uint8_t column, uint8_t len,  uint8_t pixel_col_end){}
>void LiquidCrystal_I2C::draw_vertical_graph(uint8_t row, uint8_t column, uint8_t len,  uint8_t pixel_row_end){}
>void LiquidCrystal_I2C::setContrast(uint8_t new_val){}
>
>

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Attachments on bug 234585: 200732