esp_lcd.h File Reference

Liquid Crystal Display header file. More...

#include "driver/gpio.h"

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Data Structures
struct	lcd_t
	LCD object. More...

Macros
#define	LCD_FAIL   -1
#define	LCD_OK   0
#define	LCD_DATA_LINE   4

Typedefs
typedef int	lcd_err_t

Enumerations
enum	lcd_state_t { LCD_INACTIVE = 0 , LCD_ACTIVE = 1 }

Functions
void	lcdDefault (lcd_t *const lcd)
	LCD default constructor.
void	lcdInit (lcd_t *const lcd)
	Initialize LCD object.
void	lcdCtor (lcd_t *lcd, gpio_num_t data[LCD_DATA_LINE], gpio_num_t en, gpio_num_t regSel)
	LCD constructor.
lcd_err_t	lcdSetText (lcd_t *const lcd, char *text, int x, int y)
	Set text.
lcd_err_t	lcdSetInt (lcd_t *const lcd, int val, int x, int y)
	Set integer.
lcd_err_t	lcdClear (lcd_t *const lcd)
	Clear LCD screen Detailed description starts here.
void	lcdFree (lcd_t *const lcd)
	Reset pins to default configuration.
void	assert_lcd (lcd_err_t lcd_error)

Detailed Description

Liquid Crystal Display header file.

Author

Jesus Minjares (https://github.com/jminjares4)

Version

0.1

Date

2022-08-15

Copyright

Copyright (c) 2022

Macro Definition Documentation

LCD_DATA_LINE

#define LCD_DATA_LINE   4

4-Bit data line

LCD_FAIL

#define LCD_FAIL   -1

LCD fail error

LCD_OK

#define LCD_OK   0

LCD success

Typedef Documentation

lcd_err_t

typedef int lcd_err_t

LCD error type

Enumeration Type Documentation

lcd_state_t

enum lcd_state_t

Enumerator
LCD_INACTIVE	LCD inactive
LCD_ACTIVE	LCD active

Function Documentation

assert_lcd()

void assert_lcd

(

lcd_err_t

lcd_error

)

lcdClear()

lcd_err_t lcdClear

(

lcd_t *const

lcd

)

Clear LCD screen Detailed description starts here.

Parameters

lcd	pointer to LCD object

Returns

lcd error status

See also

lcd_err_t

lcdCtor()

void lcdCtor	(	lcd_t *	lcd,
		gpio_num_t	data[LCD_DATA_LINE],
		gpio_num_t	en,
		gpio_num_t	regSel )

LCD constructor.

Detailed description starts here

Parameters

lcd	pointer to LCD object
data	lcd data array
en	lcd en
regSel	register select

Returns

None

lcdDefault()

void lcdDefault

(

lcd_t *const

lcd

)

LCD default constructor.

Parameters

lcd	pointer to LCD object

Note

This function call will use hardcode pins. If you want to use custom pins

See also

lcd_ctor

Returns

None

lcdFree()

void lcdFree

(

lcd_t *const

lcd

)

Reset pins to default configuration.

Freeing GPIO pins.

Parameters

lcd	pointer to LCD object

Note

This function will set GPIO pins to reset configuration, disabling the LCD.

See also

gpio_reset_pin()

lcdInit()

void lcdInit

(

lcd_t *const

lcd

)

Initialize LCD object.

Parameters

lcd	pointer to LCD object

Note

Must constructor LCD object.

See also

lcd_ctor() and

lcd_default()

Returns

None

lcdSetInt()

lcd_err_t lcdSetInt	(	lcd_t *const	lcd,
		int	val,
		int	x,
		int	y )

Set integer.

Detailed description starts here

Parameters

lcd	pointer to LCD object
val	integer value to be displayed
x	location at x-axis
y	location at y-axis

Returns

lcd error status

See also

lcd_err_t

lcdSetText()

lcd_err_t lcdSetText	(	lcd_t *const	lcd,
		char *	text,
		int	x,
		int	y )

Set text.

Detailed description starts here

Parameters

lcd	pointer to LCD object
text	string text
x	location at x-axis
y	location at y-axis

Returns

lcd error status

See also

lcd_err_t