code of lcd16x2.c and l cd16x2.h

#include <xc.h>
#include "lcd16x2.h"

void lcd_setpins(unsigned char data) {
    if ((data & 0x01) == 0x01)
        RC0 = 1;
    else
        RC0 = 0;
    if ((data & 0x02) == 0x02)
        RC1 = 1;
    else
        RC1 = 0;
    if ((data & 0x04) == 0x04)
        RC2 = 1;
    else
        RC2 = 0;
    if ((data & 0x08) == 0x08)
        RC3 = 1;
    else
        RC3 = 0;
}

void lcd_cmd(unsigned char cmd) {
    unsigned char high_bits;
    unsigned char low_bits;
        high_bits = (cmd & 0xF0)>>4;
        low_bits = cmd & 0x0F;
        RS = 0;  // RS = instruction
       lcd_setpins(high_bits);
        EN = 1;  // enable = high
        EN = 0;
        lcd_setpins(low_bits);
        EN = 1;  // enable = high
        EN = 0;
}


void lcd_init(void) {
  RS = 0; // instruction
  lcd_setpins(0x00);
   __delay_ms(20);
  lcd_cmd(0x03);
        __delay_ms(5);
  lcd_cmd(0x03);
        __delay_ms(11);
  lcd_cmd(0x03);
  /////////////////////////////////////////////////////
  lcd_cmd(0x02); // 4-bit mode
  lcd_cmd(0x28); //  4-bit, 2 Line, 5x7 Dots  101000
  lcd_cmd(0x0C); // Display on Cursor off
  lcd_cmd(0x06);//  Entry mode, auto increment I/D with no shift.
}

void lcd_print_char(unsigned char data) {

    unsigned char high_bits;
    unsigned char low_bits;
        high_bits = (data & 0xF0)>>4;
        low_bits = data & 0x0F;
        RS = 1;  // RS = data
        lcd_setpins(high_bits);
        EN = 1;  // enable = high
        EN = 0;
        lcd_setpins(low_bits);
        EN = 1;  // enable = high
        EN = 0;
}


void lcd_print_str(char *str) {
    int i = 0;
    for (i=0; str[i] != '\0'; i++) {
        lcd_print_char(str[i]);
    }
}

void lcd_setcursor(unsigned char x, unsigned char y){  // line 1 or 2,  1 tot 16
    unsigned char temp;
    if(x == 1)  //  1000 - 0000 to 1111
    {
      temp = 0x80 + y - 1;
      lcd_cmd(temp);
    }
    else if (x == 2)  //  1100 - 0000 to 1111
    {
        temp = 0xC0 + y - 1;
        lcd_cmd(temp);
    }
}
void lcd_makechar(unsigned char *pattern, const char location){
    int i=0;
    lcd_cmd (0x40+(location*8));     //Send the Address of CGRAM
    for (i=0; i<8; i++) {
        lcd_print_char(pattern[i]);         //Pass the bytes of pattern on LCD
    }
}

void lcd_clr(void) {
    lcd_cmd(0x01);
    lcd_cmd(0x02);
}


//----------------------lcd16x2 header file----------------------
#ifndef LCD16X2_H
#define lcd16X2_H

#ifdef  __cplusplus
extern "C" {
#endif /* __cplusplus */
#ifdef  __cplusplus
}
#endif /* __cplusplus */

#endif  /* XC_HEADER_TEMPLATE_H */

#include <xc.h> // include processor files - each processor file is guarded.


#define RS RB5
#define EN RB6
#define _XTAL_FREQ 4000000

void lcd_init(void);
void lcd_cmd(unsigned char cmd);
void lcd_print_char(unsigned char data);
void lcd_setcursor(unsigned char x, unsigned char y);
void lcd_print_str(char *str);
void lcd_makechar(unsigned char *pattern, const char location);
void lcd_clr(void);