[PIC] Vehicle Monitoring System with GPS and GSM - PIC18F46k22

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#include <p18f46k22.h>
#include <delays.h>
 
#define LCD_DATA PORTD
#define LCD_RS PORTDbits.RD4
#define LCD_RW PORTDbits.RD5
#define LCD_EN PORTDbits.RD6
#define LCD_PWR PORTDbits.RD7
 
 
void Init_LCD(void);
void disCmd(unsigned char);
void disData(unsigned char);
void lcdCmd(unsigned char);
void lcdData(unsigned char);
void LCD_STROBE(void);
void string(char);
 
void main()
{
    ADCON1 = 0x0f;
    OSCCON = 0x36;
    TRISD = 0;
 
    Init_LCD();
 
    disCmd(0x80);
    string("HELLO WORLD");
    disCmd(0xc0);
    string("IT IS WORKING:-)");
 
}
 
 
//****************************************************************************************************
/* LCD display initialization */
void Init_LCD()                     
{
    disCmd(0x02);
    disCmd(0x82);
    disCmd(0x60);
    disCmd(0xc0);
    disCmd(0x80);
    disCmd(0x30);
    disCmd(0x10);
}
 
 
void LCD_STROBE(void)
{
    LCD_EN = 1;
    Delay1KTCYx(0.001);
    LCD_EN = 0;
}
 
 
void string(char q)
{
    while(q)
        disData(q++);
}
 
void disCmd(unsigned char cmdValue)
{
    unsigned char cmdValue1;
    cmdValue1 = PORTD;
    cmdValue1 &= 0xf0;
    cmdValue1 = cmdValue1 | (cmdValue & 0x0f);
    lcdCmd(cmdValue1);
}
 
 
void disData(unsigned char dataValue)
{
    unsigned char dataValue1;
    dataValue1 = PORTD;
    dataValue1 &= 0xf0;
    dataValue1 = dataValue1 | (dataValue & 0x0f);
    lcdData(dataValue1);
} 
 
 
void lcdCmd(unsigned char cmdOut)
{
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_DATA = (cmdOut >> 4);
    LCD_STROBE();
    LCD_DATA = cmdOut;
    LCD_STROBE();
}
 
 
void lcdData(unsigned char dataOut)
{
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_DATA = (dataOut >> 4);
    LCD_STROBE();
    LCD_DATA = dataOut;
    LCD_STROBE();
}