#ifndef __XLCD_H
#define __XLCD_H

#include <xc.h>

#define _XTAL_FREQ  4000000     // frekvencija na kojoj radi interni oscilator. Neophodno definisati zbog delay() funkcija

/* Interface type 8-bit or 4-bit
 * For 8-bit operation uncomment the #define BIT8
 */

//#define BIT8

/* When in 4-bit interface define if the data is in the upper
 * or lower nibble.  For lower nibble, comment the #define UPPER
 */
#define UPPER

/* DATA_PORT defines the port to which the LCD data lines are connected */

#define DATA_PORT      LATB
#define TRIS_DATA_PORT TRISB

/*
 * Uncomment this line if non-blocking functions are desired.
 * If following line is commented, caller must make sure that
 * XLCD is free ( !XLCDIsBusy() )before calling any get/put commands.
 */
#define XLCD_IS_BLOCKING

/*
 * Comment following line if there is no read back capability
 * for this LCD.
 */
//#define XLCD_READ_BACK

/*
 * Uncomment following line if you want to read data from LCD
 */
//#define XLCD_ENABLE_LCD_READS

/*
 * Set your LCD type.
 */
#define XCLD_TYPE           (FOUR_BIT & LINES_5X8)

/*
 * This is how LCD will be setup on Init.
 */
#define XLCD_DISPLAY_SETUP  (CURSOR_OFF & BLINK_OFF)
//#define XLCD_DISPLAY_SETUP  (CURSOR_ON | BLINK_ON)


/*
 * Uncomment following line if LCD data is to be read back.
 */
//#define XLCD_ENABLE_LCD_READS

/* CTRL_PORT defines the port where the control lines are connected.
 * These are just samples, change to match your application.
 */

//#define RW_PIN   RE0   /* PORT for RW */
//#define TRIS_RW  TRISE0    /* TRIS for RW */
#define RS_PIN   RA1   /* PORT for RS */
#define TRIS_RS  TRISA1    /* TRIS for RS */
#define E_PIN    RA3   /* PORT for E  */
#define TRIS_E   TRISA3    /* TRIS for E  */

/* Display ON/OFF Control defines */
#define DON         0b00001111  /* Display on      */
#define DOFF        0b00001011  /* Display off     */
//#define CURSOR_ON   0b00001111  /* Cursor on       */
#define CURSOR_ON   0b00001110  /* Cursor on       */
//#define CURSOR_OFF  0b00001101  /* Cursor off      */
#define CURSOR_OFF  0b00001100  /* Cursor off      */

//#define BLINK_ON    0b00001111  /* Cursor Blink    */
#define BLINK_ON    0b00001101  /* Cursor Blink    */
//#define BLINK_OFF   0b00001110  /* Cursor No Blink */
#define BLINK_OFF   0b00001100  /* Cursor No Blink */

/* Cursor or Display Shift defines */
#define SHIFT_CUR_LEFT    0b00010011  /* Cursor shifts to the left   */
#define SHIFT_CUR_RIGHT   0b00010111  /* Cursor shifts to the right  */
#define SHIFT_DISP_LEFT   0b00011011  /* Display shifts to the left  */
#define SHIFT_DISP_RIGHT  0b00011111  /* Display shifts to the right */
#define DISP_CLEAR        0b00000001

/* Function Set defines */
#define FOUR_BIT   0b00101111  /* 4-bit Interface               */
#define EIGHT_BIT  0b00111111  /* 8-bit Interface               */
#define LINE_5X7   0b00110011  /* 5x7 characters, single line   */
#define LINE_5X10  0b00110111  /* 5x10 characters               */
#define LINES_5X7  0b00111111  /* 5x7 characters, multiple line */
#define LINES_5X8  0b00111000  /* 5x8 characters, multiple line */


void XLCDInit(void);
void XLCDPut(char data);
void XLCDPutString(char *string);
void XLCDPutROMString(const char *string);
char XLCDIsBusy(void);
void XLCDCommand(unsigned char cmd);
unsigned char XLCDGetAddr(void);
char XLCDGet(void);
void XLCDGoto(unsigned char row, unsigned char col);

#define XLCDClear()         XLCDCommand(DISP_CLEAR)
#define XLCDCursorRight()   XLCDCommand(SHIFT_CUR_RIGHT)
#define XLCDCursorLeft()    XLCDCommand(SHIFT_CUR_LEFT)
#define XLCDShiftLeft()     XLCDCommand(SHIFT_DISP_LEFT)
#define XLCDShiftRight()    XLCDCommand(SHIFT_DISP_RIGHT)

#define XLCDCursorOn()   XLCDCommand(CURSOR_ON)
#define XLCDBlinkOn()   XLCDCommand(BLINK_ON)
#define XLCDCursorOff()   XLCDCommand(CURSOR_OFF)
#define XLCDBlinkOff()   XLCDCommand(BLINK_OFF)


#define XLCDCGRAMAddr(addr) XLCDCommand(addr | 0b01000000)
#define XLCDDDRAMAddr(addr) XLCDCommand(addr | 0b10000000)

/* User defines these routines/macros according to the oscillator frequency */

#endif