hd44780.h File Reference

Interface definition for the HD44780 LCD driver. More...

Detailed Description

Interface definition for the HD44780 LCD driver.

Author

Sebastian Meiling s@mln.nosp@m.g.ne.nosp@m.t

Definition in file hd44780.h.

#include <stdint.h>
#include "periph/gpio.h"

Include dependency graph for hd44780.h:

Go to the source code of this file.

Data Structures
struct	hd44780_params_t
	Parameters needed for device initialization. More...
struct	hd44780_t
	Device descriptor for HD44780 LCD. More...

Macros
#define	HD44780_MAX_COLS   (40U)
	Maximal number of columns supported by the driver.
#define	HD44780_MAX_ROWS   (4U)
	Maximal number of rows supported by the driver.
#define	HD44780_MAX_PINS   (8U)
	Number of data pins for communication 4 or 8.
#define	HD44780_CGRAM_SIZE   (8U)
	Size of RAM for custom chars.

Enumerations
enum	hd44780_state_t { HD44780_OFF , HD44780_ON }
	Simple state values. More...

Functions
int	hd44780_init (hd44780_t *dev, const hd44780_params_t *params)
	Initialize the given driver.
void	hd44780_clear (const hd44780_t *dev)
	Clear display, delete all chars.
void	hd44780_home (const hd44780_t *dev)
	Reset cursor to row 0 and column 0.
void	hd44780_set_cursor (const hd44780_t *dev, uint8_t col, uint8_t row)
	Set cursor to specific position in column and row.
void	hd44780_display (hd44780_t *dev, hd44780_state_t state)
	Turn display on or off.
void	hd44780_cursor (hd44780_t *dev, hd44780_state_t state)
	Show cursor, on or off.
void	hd44780_blink (hd44780_t *dev, hd44780_state_t state)
	Blink cursor, on or off.
void	hd44780_scroll_left (const hd44780_t *dev)
	Enable left scrolling.
void	hd44780_scroll_right (const hd44780_t *dev)
	Enable right scrolling.
void	hd44780_left2right (hd44780_t *dev)
	Set display direction left to right.
void	hd44780_right2left (hd44780_t *dev)
	Set display direction right to left.
void	hd44780_autoscroll (hd44780_t *dev, hd44780_state_t state)
	Display autoscroll on or off.
void	hd44780_create_char (const hd44780_t *dev, uint8_t location, uint8_t charmap[])
	Create and store a custom character on display memory.
void	hd44780_write (const hd44780_t *dev, uint8_t value)
	Write a single character on the LCD.
void	hd44780_print (const hd44780_t *dev, const char *data)
	Write a string on the LCD.