lcd.h File Reference

#include <inttypes.h>
#include <avr/pgmspace.h>

Functions
#define	lcd_puts_P(__s)   lcd_puts_p(PSTR(__s))
	macros for automatically storing string constant in program memory
void	lcd_init (uint8_t dispAttr)
	Initialize display and select type of cursor.
void	lcd_clrscr (void)
	Clear display and set cursor to home position.
void	lcd_home (void)
	Set cursor to home position.
void	lcd_gotoxy (uint8_t x, uint8_t y)
	Set cursor to specified position.
void	lcd_putc (char c)
	Display character at current cursor position.
void	lcd_puts (const char *s)
	Display string without auto linefeed.
void	lcd_puts_p (const char *progmem_s)
	Display string from program memory without auto linefeed.
void	lcd_command (uint8_t cmd)
	Send LCD controller instruction command.
void	lcd_data (uint8_t data)
	Send data byte to LCD controller.
Defines
Definitions for MCU Clock Frequency
Adapt the MCU clock frequency in Hz to your target.
#define	XTAL   16000000
Definition for LCD controller type
Use 0 for HD44780 controller, change to 1 for displays with KS0073 controller.
#define	LCD_CONTROLLER_KS0073   0
Definitions for Display Size
Change these definitions to adapt setting to your display
#define	LCD_LINES   2
#define	LCD_DISP_LENGTH   20
#define	LCD_LINE_LENGTH   0x40
#define	LCD_START_LINE1   0x00
#define	LCD_START_LINE2   0x40
#define	LCD_START_LINE3   0x14
#define	LCD_START_LINE4   0x54
#define	LCD_WRAP_LINES   0
#define	LCD_IO_MODE   1
Definitions for 4-bit IO mode
Change LCD_PORT if you want to use a different port for the LCD pins. The four LCD data lines and the three control lines RS, RW, E can be on the same port or on different ports. Change LCD_RS_PORT, LCD_RW_PORT, LCD_E_PORT if you want the control lines on different ports. Normally the four data lines should be mapped to bit 0..3 on one port, but it is possible to connect these data lines in different order or even on different ports by adapting the LCD_DATAx_PORT and LCD_DATAx_PIN definitions.
#define	LCD_PORT   PORTB
#define	LCD_DATA0_PORT   LCD_PORT
#define	LCD_DATA1_PORT   LCD_PORT
#define	LCD_DATA2_PORT   LCD_PORT
#define	LCD_DATA3_PORT   LCD_PORT
#define	LCD_DATA0_PIN   3
#define	LCD_DATA1_PIN   2
#define	LCD_DATA2_PIN   1
#define	LCD_DATA3_PIN   0
#define	LCD_RS_PORT   LCD_PORT
#define	LCD_RS_PIN   7
#define	LCD_RW_PORT   LCD_PORT
#define	LCD_RW_PIN   5
#define	LCD_E_PORT   LCD_PORT
#define	LCD_E_PIN   6
Definitions for LCD command instructions
The constants define the various LCD controller instructions which can be passed to the function lcd_command(), see HD44780 data sheet for a complete description.
#define	LCD_CLR   0
#define	LCD_HOME   1
#define	LCD_ENTRY_MODE   2
#define	LCD_ENTRY_INC   1
#define	LCD_ENTRY_SHIFT   0
#define	LCD_ON   3
#define	LCD_ON_DISPLAY   2
#define	LCD_ON_CURSOR   1
#define	LCD_ON_BLINK   0
#define	LCD_MOVE   4
#define	LCD_MOVE_DISP   3
#define	LCD_MOVE_RIGHT   2
#define	LCD_FUNCTION   5
#define	LCD_FUNCTION_8BIT   4
#define	LCD_FUNCTION_2LINES   3
#define	LCD_FUNCTION_10DOTS   2
#define	LCD_CGRAM   6
#define	LCD_DDRAM   7
#define	LCD_BUSY   7
#define	LCD_ENTRY_DEC   0x04
#define	LCD_ENTRY_DEC_SHIFT   0x05
#define	LCD_ENTRY_INC_   0x06
#define	LCD_ENTRY_INC_SHIFT   0x07
#define	LCD_DISP_OFF   0x08
#define	LCD_DISP_ON   0x0C
#define	LCD_DISP_ON_BLINK   0x0D
#define	LCD_DISP_ON_CURSOR   0x0E
#define	LCD_DISP_ON_CURSOR_BLINK   0x0F
#define	LCD_MOVE_CURSOR_LEFT   0x10
#define	LCD_MOVE_CURSOR_RIGHT   0x14
#define	LCD_MOVE_DISP_LEFT   0x18
#define	LCD_MOVE_DISP_RIGHT   0x1C
#define	LCD_FUNCTION_4BIT_1LINE   0x20
#define	LCD_FUNCTION_4BIT_2LINES   0x28
#define	LCD_FUNCTION_8BIT_1LINE   0x30
#define	LCD_FUNCTION_8BIT_2LINES   0x38
#define	LCD_MODE_DEFAULT   ((1<<LCD_ENTRY_MODE) | (1<<LCD_ENTRY_INC) )

---