#ifndef MC8051FUN_LCD_H_
#define MC8051FUN_LCD_H

#ifndef LCD_E
#define LCD_E P3_4
#endif

#ifndef LCD_RS
#define LCD_RS P3_5
#endif

#ifndef LCD_RW
#define LCD_RW P3_6
#endif

#ifndef LCD_DATA
#define LCD_DATA P0
#endif

#ifndef LCD_READY
#define LCD_READY P0_7
#endif


 
// Clear Display -------------- 0b00000001
#define LCD_CLEAR_DISPLAY       0x01
 
// Cursor Home ---------------- 0b0000001x
#define LCD_CURSOR_HOME         0x02
 
// Set Entry Mode ------------- 0b000001xx
#define LCD_SET_ENTRY           0x04
 
#define LCD_ENTRY_DECREASE      0x00
#define LCD_ENTRY_INCREASE      0x02
#define LCD_ENTRY_NOSHIFT       0x00
#define LCD_ENTRY_SHIFT         0x01
 
// Set Display ---------------- 0b00001xxx
#define LCD_SET_DISPLAY         0x08
 
#define LCD_DISPLAY_OFF         0x00
#define LCD_DISPLAY_ON          0x04
#define LCD_CURSOR_OFF          0x00
#define LCD_CURSOR_ON           0x02
#define LCD_BLINKING_OFF        0x00
#define LCD_BLINKING_ON         0x01
 
// Set Shift ------------------ 0b0001xxxx
#define LCD_SET_SHIFT           0x10
 
#define LCD_CURSOR_MOVE         0x00
#define LCD_DISPLAY_SHIFT       0x08
#define LCD_SHIFT_LEFT          0x00
#define LCD_SHIFT_RIGHT         0x04
 
// Set Function --------------- 0b001xxxxx
#define LCD_SET_FUNCTION        0x20
 
#define LCD_FUNCTION_4BIT       0x00
#define LCD_FUNCTION_8BIT       0x10
#define LCD_FUNCTION_1LINE      0x00
#define LCD_FUNCTION_2LINE      0x08
#define LCD_FUNCTION_5X7        0x00
#define LCD_FUNCTION_5X10       0x04
 
#define LCD_SOFT_RESET          0x30
 
// Set CG RAM Address --------- 0b01xxxxxx  (Character Generator RAM)
#define LCD_SET_CGADR           0x40
 
#define LCD_GC_CHAR0            0
#define LCD_GC_CHAR1            1
#define LCD_GC_CHAR2            2
#define LCD_GC_CHAR3            3
#define LCD_GC_CHAR4            4
#define LCD_GC_CHAR5            5
#define LCD_GC_CHAR6            6
#define LCD_GC_CHAR7            7
 
// Set DD RAM Address --------- 0b1xxxxxxx  (Display Data RAM)
#define LCD_SET_DDADR           0x80


#define LCD_GOTO_HOME		LCD_SET_DDADR
#define LCD_GOTO_LINE1		LCD_GOTO_HOME
#define LCD_GOTO_LINE2		LCD_SET_DDADR+0x40


#define lcd_wait_ready()\
	LCD_E=1;	\
	LCD_RS=0;	\
	LCD_RW=1; 	\
	LCD_DATA=0x80;	\
	while((LCD_DATA & 0x80))	\
	{				\
		LCD_E=0;		\
		LCD_E=1;		\
	}				\
	LCD_E=1;			\
	LCD_RW=0;		



#define lcd_cmd(c) \
	lcd_wait_ready(); \
	LCD_RS=0;	\
	LCD_DATA=c;	\
	LCD_E=0

#define lcd_chr(c)	\
	lcd_wait_ready(); \
	LCD_RS=1;	\
	LCD_DATA=c;	\
	LCD_E=0



#endif