new_contents: import i2c_lib
  from time import *
  
  # LCD Address
  ADDRESS = 0x27
  
  # commands
  LCD_CLEARDISPLAY = 0x01
  LCD_RETURNHOME = 0x02
  LCD_ENTRYMODESET = 0x04
  LCD_DISPLAYCONTROL = 0x08
  LCD_CURSORSHIFT = 0x10
  LCD_FUNCTIONSET = 0x20
  LCD_SETCGRAMADDR = 0x40
  LCD_SETDDRAMADDR = 0x80
  
  # flags for display entry mode
  LCD_ENTRYRIGHT = 0x00
  LCD_ENTRYLEFT = 0x02
  LCD_ENTRYSHIFTINCREMENT = 0x01
  LCD_ENTRYSHIFTDECREMENT = 0x00
  
  # flags for display on/off control
  LCD_DISPLAYON = 0x04
  LCD_DISPLAYOFF = 0x00
  LCD_CURSORON = 0x02
  LCD_CURSOROFF = 0x00
  LCD_BLINKON = 0x01
  LCD_BLINKOFF = 0x00
  
  # flags for display/cursor shift
  LCD_DISPLAYMOVE = 0x08
  LCD_CURSORMOVE = 0x00
  LCD_MOVERIGHT = 0x04
  LCD_MOVELEFT = 0x00
  
  # flags for function set
  LCD_8BITMODE = 0x10
  LCD_4BITMODE = 0x00
  LCD_2LINE = 0x08
  LCD_1LINE = 0x00
  LCD_5x10DOTS = 0x04
  LCD_5x8DOTS = 0x00
  
  # flags for backlight control
  LCD_BACKLIGHT = 0x08
  LCD_NOBACKLIGHT = 0x00
  
  En = 0b00000100 # Enable bit
  Rw = 0b00000010 # Read/Write bit
  Rs = 0b00000001 # Register select bit
  
  class lcd:
     #initializes objects and lcd
     def __init__(self):
        self.lcd_device = i2c_lib.i2c_device(ADDRESS)
  
        self.lcd_write(0x03)
        self.lcd_write(0x03)
        self.lcd_write(0x03)
        self.lcd_write(0x02)
  
        self.lcd_write(LCD_FUNCTIONSET | LCD_2LINE | LCD_5x8DOTS | LCD_4BITMODE)
        self.lcd_write(LCD_DISPLAYCONTROL | LCD_DISPLAYON)
        self.lcd_write(LCD_CLEARDISPLAY)
        self.lcd_write(LCD_ENTRYMODESET | LCD_ENTRYLEFT)
        sleep(0.2)
  
     # clocks EN to latch command
     def lcd_strobe(self, data):
        self.lcd_device.write_cmd(data | En | LCD_BACKLIGHT)
        sleep(.0005)
        self.lcd_device.write_cmd(((data & ~En) | LCD_BACKLIGHT))
        sleep(.0001)
  
     def lcd_write_four_bits(self, data):
        self.lcd_device.write_cmd(data | LCD_BACKLIGHT)
        self.lcd_strobe(data)
  
     # write a command to lcd
     def lcd_write(self, cmd, mode=0):
        self.lcd_write_four_bits(mode | (cmd & 0xF0))
        self.lcd_write_four_bits(mode | ((cmd << 4) & 0xF0))
  
     # put string function
     def lcd_display_string(self, string, line):
        if line == 1:
           self.lcd_write(0x80)
        if line == 2:
           self.lcd_write(0xC0)
        if line == 3:
           self.lcd_write(0x94)
        if line == 4:
           self.lcd_write(0xD4)
  
        for char in string:
           self.lcd_write(ord(char), Rs)
  
     # clear lcd and set to home
     def lcd_clear(self):
        self.lcd_write(LCD_CLEARDISPLAY)
        self.lcd_write(LCD_RETURNHOME)
  
subject: Create lcddriver.py