Ruengrid Witoonpan
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UltraSonic1
Help me please
Diff: LiquidCrystal_I2C.cpp
- Revision:
- 0:b78e02ab7cde
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/LiquidCrystal_I2C.cpp Wed Jan 15 17:17:21 2020 +0000 @@ -0,0 +1,283 @@ +#include "LiquidCrystal_I2C.h" +#include "mbed.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). + + +I2C _i2c(D14, D15); // SDA, SCL + +LiquidCrystal_I2C::LiquidCrystal_I2C(unsigned char lcd_addr, unsigned char lcd_cols, unsigned char lcd_rows, unsigned char charsize) +{ + _addr = lcd_addr; + _cols = lcd_cols; + _rows = lcd_rows; + _charsize = charsize; + _backlightval = LCD_BACKLIGHT; +} + +void LiquidCrystal_I2C::begin() { + //Wire.begin(); + _displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS; + + if (_rows > 1) { + _displayfunction |= LCD_2LINE; + } + + // for some 1 line displays you can select a 10 pixel high font + if ((_charsize != 0) && (_rows == 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 + wait_ms(50); + + // Now we pull both RS and R/W low to begin commands + expanderWrite(_backlightval); // reset expanderand turn backlight off (Bit 8 =1) + wait_ms(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); + wait_us(4500); // wait min 4.1ms + + // second try + write4bits(0x03 << 4); + wait_us(4500); // wait min 4.1ms + + // third go! + write4bits(0x03 << 4); + wait_us(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 + wait_us(2000); // this command takes a long time! +} + +void LiquidCrystal_I2C::home(){ + command(LCD_RETURNHOME); // set cursor position to zero + wait_us(2000); // this command takes a long time! +} + +void LiquidCrystal_I2C::setCursor(unsigned char col, unsigned char row){ + int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 }; + if (row > _rows) { + row = _rows-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(unsigned char location, unsigned char 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); +} +bool LiquidCrystal_I2C::getBacklight() { + return _backlightval == LCD_BACKLIGHT; +} + + +/*********** mid level commands, for sending data/cmds */ + +inline void LiquidCrystal_I2C::command(unsigned char value) { + send(value, 0); +} + +inline int LiquidCrystal_I2C::write(unsigned char value) { + send(value, Rs); + return 1; +} + + +/************ low level data pushing commands **********/ + +// write either command or data +void LiquidCrystal_I2C::send(unsigned char value, unsigned char mode) { + unsigned char highnib=value&0xf0; + unsigned char lownib=(value<<4)&0xf0; + write4bits((highnib)|mode); + write4bits((lownib)|mode); +} + +void LiquidCrystal_I2C::write4bits(unsigned char value) { + expanderWrite(value); + pulseEnable(value); +} + +void LiquidCrystal_I2C::expanderWrite(unsigned char _data){ + char data_write[2]; + data_write[0] = _data | _backlightval; + //Wire.beginTransmission(_addr); + //Wire.write((int)(_data) | _backlightval); + //Wire.endTransmission(); + _i2c.write(_addr, data_write, 1, 0); + _i2c.stop(); +} + +void LiquidCrystal_I2C::pulseEnable(unsigned char _data){ + expanderWrite(_data | En); // En high + wait_us(1); // enable pulse must be >450ns + + expanderWrite(_data & ~En); // En low + wait_us(50); // commands need > 37us to settle +} + +void LiquidCrystal_I2C::load_custom_character(unsigned char char_num, unsigned char *rows){ + createChar(char_num, rows); +} + +void LiquidCrystal_I2C::setBacklight(unsigned char 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); +} + +int LiquidCrystal_I2C::print(const char* text) { + + while (*text !=0) { + //_putc(*text); + send(*text, Rs); + text++; + } + return 0; +} + +/* +void lcd_dat(unsigned char p) +{ +PORTC |= (1 << RS)|(1 << EN); // RS = 1, EN = 1 (начало записи команды в LCD) +PORTD = p; // Вывод команды на шину DB0-7 LCD +_delay_us(100); // Длительность сигнала EN +PORTC &= ~(1 << EN); // EN = 0 (конец записи команды в LCD) +_delay_us(100); // Пауза для выполнения команды +} +*/ \ No newline at end of file