java.lang.Object
- com.diozero.devices.HD44780Lcd

All Implemented Interfaces:

DeviceInterface, AutoCloseable
```
public class HD44780Lcd
extends Object
implements DeviceInterface
```
LCD with HD44780 controller.
Code based on this Raspberry-Pi Spy article, Python code.

Another source of information: https://gist.github.com/DenisFromHR/cc863375a6e19dce359d.

HD44780 Datasheet.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`HD44780Lcd.Characters`
`static interface`	`HD44780Lcd.LcdConnection`
`static class`	`HD44780Lcd.PCF8574LcdConnection`
`static class`	`HD44780Lcd.PiFaceCadLcdConnection`

Constructor Summary

Constructors
Constructor Description

HD44780Lcd(HD44780Lcd.LcdConnection lcdConnection, int columns, int rows)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`HD44780Lcd`	`addText(char character)`
`HD44780Lcd`	`addText(int code)`
`HD44780Lcd`	`addText(String text)`
`HD44780Lcd`	`autoscrollOff()`
`HD44780Lcd`	`autoscrollOn()`
`HD44780Lcd`	`blinkOff()`
`HD44780Lcd`	`blinkOn()`
`HD44780Lcd`	`clear()`	Clear the display
`void`	`close()`	Close this device
`HD44780Lcd`	`createChar(int location, byte[] charMap)`
`HD44780Lcd`	`cursorOff()`
`HD44780Lcd`	`cursorOn()`
`HD44780Lcd`	`cursorOrDisplayShift(boolean displayShift, boolean shiftRight)`	Cursor or display shift shifts the cursor position or display to the right or left without writing or reading display data.
`HD44780Lcd`	`displayControl(boolean displayOn, boolean cursorEnabled, boolean blinkEnabled)`
`HD44780Lcd`	`displayOff()`
`HD44780Lcd`	`displayOn()`
`HD44780Lcd`	`entryModeControl(boolean increment, boolean shiftDisplay)`	Control text entry mode.
`int`	`getColumnCount()`
`int`	`getRowCount()`
`boolean`	`isBacklightEnabled()`
`boolean`	`isBlinkEnabled()`
`boolean`	`isCursorEnabled()`
`boolean`	`isIncrementOn()`
`boolean`	`isShiftDisplayOn()`
`HD44780Lcd`	`moveCursorLeft()`
`HD44780Lcd`	`moveCursorRight()`
`HD44780Lcd`	`returnHome()`	Return the cursor to the home position
`HD44780Lcd`	`setBacklightEnabled(boolean backlightEnabled)`
`HD44780Lcd`	`setCharacter(int column, int row, char character)`
`HD44780Lcd`	`setCursorPosition(int column, int row)`
`HD44780Lcd`	`setText(int row, String text)`	Send string to display
`HD44780Lcd`	`shiftDisplayLeft()`
`HD44780Lcd`	`shiftDisplayRight()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - HD44780Lcd
```
public HD44780Lcd(HD44780Lcd.LcdConnection lcdConnection,
                  int columns,
                  int rows)
```
- Method Detail
  - getColumnCount
```
public int getColumnCount()
```
  - getRowCount
```
public int getRowCount()
```
  - isBacklightEnabled
```
public boolean isBacklightEnabled()
```
  - setBacklightEnabled
```
public HD44780Lcd setBacklightEnabled(boolean backlightEnabled)
```
  - setCursorPosition
```
public HD44780Lcd setCursorPosition(int column,
                                    int row)
```
  - setCharacter
```
public HD44780Lcd setCharacter(int column,
                               int row,
                               char character)
```
  - setText
```
public HD44780Lcd setText(int row,
                          String text)
```
    Send string to display
    
    Parameters:
    
    row - Row number (starts at 0)
    
    text - Text to display
    
    Returns:
    
    This object instance
  - addText
```
public HD44780Lcd addText(String text)
```
  - addText
```
public HD44780Lcd addText(char character)
```
  - addText
```
public HD44780Lcd addText(int code)
```
  - clear
```
public HD44780Lcd clear()
```
    Clear the display
    
    Returns:
    
    This object instance
  - returnHome
```
public HD44780Lcd returnHome()
```
    Return the cursor to the home position
    
    Returns:
    
    This object instance
  - entryModeControl
```
public HD44780Lcd entryModeControl(boolean increment,
                                   boolean shiftDisplay)
```
    Control text entry mode.
    
    Parameters:
    
    increment - The cursor or blinking moves to the right when incremented by 1 and to the left when decremented by 1.
    
    shiftDisplay - Shifts the entire display either to the right (I/D = 0) or to the left (I/D = 1) when true. The display does not shift if false. If true, it will seem as if the cursor does not move but the display does.
    
    Returns:
    
    This object instance
  - autoscrollOn
```
public HD44780Lcd autoscrollOn()
```
  - autoscrollOff
```
public HD44780Lcd autoscrollOff()
```
  - isIncrementOn
```
public boolean isIncrementOn()
```
  - isShiftDisplayOn
```
public boolean isShiftDisplayOn()
```
  - displayControl
```
public HD44780Lcd displayControl(boolean displayOn,
                                 boolean cursorEnabled,
                                 boolean blinkEnabled)
```
  - displayOn
```
public HD44780Lcd displayOn()
```
  - displayOff
```
public HD44780Lcd displayOff()
```
  - cursorOn
```
public HD44780Lcd cursorOn()
```
  - cursorOff
```
public HD44780Lcd cursorOff()
```
  - blinkOn
```
public HD44780Lcd blinkOn()
```
  - blinkOff
```
public HD44780Lcd blinkOff()
```
  - isCursorEnabled
```
public boolean isCursorEnabled()
```
  - isBlinkEnabled
```
public boolean isBlinkEnabled()
```
  - cursorOrDisplayShift
```
public HD44780Lcd cursorOrDisplayShift(boolean displayShift,
                                       boolean shiftRight)
```
    Cursor or display shift shifts the cursor position or display to the right or left without writing or reading display data. This function is used to correct or search the display. In a 2-line display, the cursor moves to the second line when it passes the 40th digit of the first line. Note that the first and second line displays will shift at the same time. When the displayed data is shifted repeatedly each line moves only horizontally. The second line display does not shift into the first line position.
    
    Parameters:
    
    displayShift - Shift the display if true, the cursor if false.
    
    shiftRight - Shift to the right if true, to the left if false.
    
    Returns:
    
    This object instance
  - shiftDisplayRight
```
public HD44780Lcd shiftDisplayRight()
```
  - shiftDisplayLeft
```
public HD44780Lcd shiftDisplayLeft()
```
  - moveCursorRight
```
public HD44780Lcd moveCursorRight()
```
  - moveCursorLeft
```
public HD44780Lcd moveCursorLeft()
```
  - createChar
```
public HD44780Lcd createChar(int location,
                             byte[] charMap)
```
  - close
```
public void close()
           throws RuntimeIOException
```
    Description copied from interface: DeviceInterface
    
    Close this device
    
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface DeviceInterface
    
    Throws:
    
    RuntimeIOException

Class HD44780Lcd

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

HD44780Lcd

Method Detail

getColumnCount

getRowCount

isBacklightEnabled

setBacklightEnabled

setCursorPosition

setCharacter

setText

addText

addText

addText

clear

returnHome

entryModeControl

autoscrollOn

autoscrollOff

isIncrementOn

isShiftDisplayOn

displayControl

displayOn

displayOff

cursorOn

cursorOff

blinkOn

blinkOff

isCursorEnabled

isBlinkEnabled

cursorOrDisplayShift

shiftDisplayRight

shiftDisplayLeft

moveCursorRight

moveCursorLeft

createChar

close