/* vim: set sw=8 ts=8 si : */
/****************************************************************************
* Title : HD44780U LCD library
* Authors:
* Based on Volker Oth's lcd library (http://members.xoom.com/volkeroth)
* modified by Peter Fleury's (http://jump.to/fleury). Flexible pin
* configuration by Markus Ermert. Adapted for the linuxfocus LCD display
* by Guido Socher.
*
* Software: AVR-GCC with AVR-AS
* Target: any AVR device
* Copyright: GPL
*
*
*****************************************************************************/
#ifndef LCD_H
#define LCD_H
#include <pgmspace.h>
/* you shouldn't need to change anything below this line */
typedef unsigned char u08;
typedef unsigned short u16;
/* instruction register bit positions */
#define LCD_CLR 0 /* DB0: clear display */
#define LCD_HOME 1 /* DB1: return to home position */
#define LCD_ENTRY_MODE 2 /* DB2: set entry mode */
#define LCD_ENTRY_INC 1 /* DB1: 1=increment, 0=decrement */
#define LCD_ENTRY_SHIFT 0 /* DB2: 1=display shift on */
#define LCD_ON 3 /* DB3: turn lcd/cursor on */
#define LCD_ON_DISPLAY 2 /* DB2: turn display on */
#define LCD_ON_CURSOR 1 /* DB1: turn cursor on */
#define LCD_ON_BLINK 0 /* DB0: blinking cursor ? */
#define LCD_MOVE 4 /* DB4: move cursor/display */
#define LCD_MOVE_DISP 3 /* DB3: move display (0-> cursor) ? */
#define LCD_MOVE_RIGHT 2 /* DB2: move right (0-> left) ? */
#define LCD_FUNCTION 5 /* DB5: function set */
#define LCD_FUNCTION_8BIT 4 /* DB4: set 8BIT mode (0->4BIT mode) */
#define LCD_FUNCTION_2LINES 3 /* DB3: two lines (0->one line) */
#define LCD_FUNCTION_10DOTS 2 /* DB2: 5x10 font (0->5x7 font) */
#define LCD_CGRAM 6 /* DB6: set CG RAM address */
#define LCD_DDRAM 7 /* DB7: set DD RAM address */
#define LCD_BUSY 7 /* DB7: LCD is busy */
/* set entry mode: display shift on/off, dec/inc cursor move direction */
#define LCD_ENTRY_DEC 0x04 /* display shift off, dec cursor move dir */
#define LCD_ENTRY_DEC_SHIFT 0x05 /* display shift on, dec cursor move dir */
#define LCD_ENTRY_INC_ 0x06 /* display shift off, inc cursor move dir */
#define LCD_ENTRY_INC_SHIFT 0x07 /* display shift on, inc cursor move dir */
/* display on/off, cursor on/off, blinking char at cursor position */
#define LCD_DISP_OFF 0x08 /* display off */
#define LCD_DISP_ON 0x0C /* display on, cursor off */
#define LCD_DISP_ON_BLINK 0x0D /* display on, cursor off, blink char */
#define LCD_DISP_ON_CURSOR 0x0E /* display on, cursor on */
#define LCD_DISP_ON_CURSOR_BLINK 0x0F /* display on, cursor on, blink char */
/* move cursor/shift display */
#define LCD_MOVE_CURSOR_LEFT 0x10 /* move cursor left (decrement) */
#define LCD_MOVE_CURSOR_RIGHT 0x14 /* move cursor right (increment) */
#define LCD_MOVE_DISP_LEFT 0x18 /* shift display left */
#define LCD_MOVE_DISP_RIGHT 0x1C /* shift display right */
/* function set: set interface data length and number of display lines */
#define LCD_FUNCTION_4BIT_1LINE 0x20 /* 4-bit interface, single line, 5x7 dots */
#define LCD_FUNCTION_4BIT_2LINES 0x28 /* 4-bit interface, dual line, 5x7 dots */
#define LCD_FUNCTION_8BIT_1LINE 0x30 /* 8-bit interface, single line, 5x7 dots */
#define LCD_FUNCTION_8BIT_2LINES 0x38 /* 8-bit interface, dual line, 5x7 dots */
#define LCD_MODE_DEFAULT ((1<<LCD_ENTRY_MODE) | (1<<LCD_ENTRY_INC) )
/*
** function prototypes
*/
extern void lcd_command(u08 cmd);
extern void lcd_gotoxy(u08 x, u08 y); /* line 1 y=0, line 2 y=1 */
extern void lcd_clrscr(void); /* clear lcd and set cursor to home position */
extern void lcd_home(void); /* set cursor to home position */
extern void lcd_putc(char c); /* print character at current cursor position */
extern void lcd_puts(const char *s); /* print string on lcd (no auto linefeed) */
#define ROLLLEN 18
/* shift a text string over a given ROLLLEN length
* as shown below. The ROLLBUF size should be the
* visible display lenght or a bit smaller
* 00: | |
* 01: | h|
* 02: | he|
* 03: | hel|
* 04: | hell|
* 05: | hello|
* 06: | hello |
* 07: | hello |
* 08: | hello |
* 09: | hello |
* 10: | hello |
* 11: | hello |
* 12: | hello |
* 13: | hello |
* 14: |hello |
* 15: |ello |
* 16: |llo |
* 17: |lo |
* 18: |o |
* 19: | |
* 20: | |
*
*/
extern void rolltext_lcd_p(prog_char *text, int shiftlen);
/* if you hard code a string in the program then you need to decalare
* it like: char *str =PSTR("hello world");
* and then use lcd_puts_p(str);*/
extern void lcd_puts_p(const prog_char *progmem_s); /* print string from program memory on lcd (no auto linefeed) */
extern void lcd_init(u08 dispAttr); /* initialize the LCD. Call this once*/
/*
** macros for automatically storing string constant in program memory
*/
#ifndef P
#define P(s) ({static const char c[] __attribute__ ((progmem)) = s;c;})
#endif
#define lcd_puts_P(__s) lcd_puts_p(P(__s))
#endif //LCD_H
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