hd44780

Documentation

Index

• Constants
• Variables
• func LcdDisplay(lcdtext_show [4]string, PRSPin int, PEPin int, PD4Pin int, PD5Pin int, ...)
• type GPIO4bit
  • func NewGPIO4bit() (h *GPIO4bit)
  • func (h *GPIO4bit) Active() bool
  • func (h *GPIO4bit) Clear()
  • func (h *GPIO4bit) Close()
  • func (h *GPIO4bit) Display(line int, text string)
  • func (h *GPIO4bit) DisplayLines(msg string)
  • func (h *GPIO4bit) Open() (err error)
  • func (h *GPIO4bit) Reset()
  • func (h *GPIO4bit) SetChar(pos byte, def []byte)
  • func (h *GPIO4bit) ToggleBacklight()
• type HD44780
• type I2C4bit
  • func NewI2C4bit(addr byte) (h *I2C4bit)
  • func (h *I2C4bit) Active() bool
  • func (h *I2C4bit) Clear()
  • func (h *I2C4bit) Close()
  • func (h *I2C4bit) Display(line int, text string)
  • func (h *I2C4bit) DisplayLines(msg string)
  • func (h *I2C4bit) Open() (err error)
  • func (h *I2C4bit) Reset()
  • func (h *I2C4bit) SetChar(pos byte, def []byte)
  • func (h *I2C4bit) ToggleBacklight()

Constants

const (

	// LCD 4x20 Mode Setting defaults
	Lines int = 4

	Width int = 20 // Maximum characters per line

)

Variables

var (
	BKPin int = 0
	RSPin int = 0 // GOIO 7   --> Raspberry Physical Pin 26  RS Bit/pin
	EPin  int = 0 // GPIO 8   --> Raspberry Physical Pin 24  Enable bit/pin
	D4Pin int = 0 // GPIO 25  --> Raspberry Physical Pin 22  Data4 bit/pin
	D5Pin int = 0 // GPIO 24  --> Raspberry Physical Pin 18  Data5 bit/pin
	D6Pin int = 0 // GPIO 23  --> Raspberry Physical Pin 16  Data6 bit/pin
	D7Pin int = 0 // GPIO 18  --> Raspberry Physical Pin 12  Data7 bit/pin
)

Functions

func LcdDisplay

func LcdDisplay(lcdtext_show [4]string, PRSPin int, PEPin int, PD4Pin int, PD5Pin int, PD6Pin int, PD7Pin int, LCDInterfaceType string, LCDI2CAddress byte)

Types

type GPIO4bit

type GPIO4bit struct {
	sync.Mutex

	RSPin int // GOIO 7   --> Raspberry Physical Pin 26
	EPin  int // GPIO 8    --> Raspberry Physical Pin 24
	D4Pin int // GPIO 25  --> Raspberry Physical Pin 22
	D5Pin int // GPIO 24  --> Raspberry Physical Pin 18
	D6Pin int // GPIO 23  --> Raspberry Physical Pin 16
	D7Pin int // GPIO 18  --> Raspberry Physical Pin 12

	// max lines
	Lines int
	// Memory address for each line
	LinesAddr []byte
	// LCD width (number of character in line)
	Width int
	// contains filtered or unexported fields
}

func NewGPIO4bit

func NewGPIO4bit() (h *GPIO4bit)

NewGPIO4bit create new GPIO4bit structure with some defaults

func (*GPIO4bit) Active

func (h *GPIO4bit) Active() bool

Active return true when interface is working ok

func (*GPIO4bit) Clear

func (h *GPIO4bit) Clear()

Clear display

func (*GPIO4bit) Close

func (h *GPIO4bit) Close()

Close interface, clear display.

func (*GPIO4bit) Display

func (h *GPIO4bit) Display(line int, text string)

Display only one line

func (*GPIO4bit) DisplayLines

func (h *GPIO4bit) DisplayLines(msg string)

DisplayLines sends one or more lines separated by \n to lcd

func (*GPIO4bit) Open

func (h *GPIO4bit) Open() (err error)

Open / initialize LCD interface

func (*GPIO4bit) Reset

func (h *GPIO4bit) Reset()

Reset interface

func (*GPIO4bit) SetChar

func (h *GPIO4bit) SetChar(pos byte, def []byte)

func (*GPIO4bit) ToggleBacklight

func (h *GPIO4bit) ToggleBacklight()

type HD44780

type HD44780 interface {
	Open() (err error)
	Reset()
	Close()
	Clear()
	Display(line int, text string)
	DisplayLines(msg string)
	Active() bool
	SetChar(pos byte, def []byte)
	ToggleBacklight()
}

type I2C4bit

type I2C4bit struct {

	// max lines
	Lines int
	// LCD width (number of character in line)
	Width int
	// contains filtered or unexported fields
}

I2C4bit allow communicate wit HD44780 via I2C in 4bit mode

func NewI2C4bit

func NewI2C4bit(addr byte) (h *I2C4bit)

NewI2C4bit create new I2C4bit structure with some defaults

func (*I2C4bit) Active

func (h *I2C4bit) Active() bool

Active return true when interface is working ok

func (*I2C4bit) Clear

func (h *I2C4bit) Clear()

Clear screen

func (*I2C4bit) Close

func (h *I2C4bit) Close()

Close interface, clear display.

func (*I2C4bit) Display

func (h *I2C4bit) Display(line int, text string)

Display only one line

func (*I2C4bit) DisplayLines

func (h *I2C4bit) DisplayLines(msg string)

DisplayLines sends one or more lines separated by \n to lcd

func (*I2C4bit) Open

func (h *I2C4bit) Open() (err error)

Open / initialize LCD interface

func (*I2C4bit) Reset

func (h *I2C4bit) Reset()

Reset interface

func (*I2C4bit) SetChar

func (h *I2C4bit) SetChar(pos byte, def []byte)

func (*I2C4bit) ToggleBacklight

func (h *I2C4bit) ToggleBacklight()