PIC18CODE.txt

#include <PIC18F452.h>
#define front PORTBbits.RB4
#define back  PORTBbits.RB5
#define car1 PORTBbits.RB0
#define car2 PORTBbits.RB1
#define car3 PORTBbits.RB2
void Readsensor();
void delay(unsigned int);
void lcd_cmd(unsigned char);
void lcd_data(unsigned char);
void lcd_d1(unsigned int);
#define ldata PORTC
#define RS PORTDbits.RD0
#define RW PORTDbits.RD1
#define EN PORTDbits.RD2
void always();
void status1();
void status2();
void status3();
void status4();
void slots();
void clk();
void anti();
int S1=0, S2=0, S3=0;
int F1=0, F2=0; 
int slot = 3;  
int total=0;
#define c1 PORTDbits.RD3
#define c2 PORTDbits.RD4


void main()
{
    
   
    TRISB=1;
    TRISC=0;
    TRISD=0;
    TRISDbits.TRISD3=0;
    TRISDbits.TRISD3=0;
    Readsensor();
    anti();
    always();
    status1();
    slots();
    status2();
    status3();
    status4();
    anti();
    clk();
    
}

void Readsensor()
{
S1=0, S2=0, S3=0;
if(car1 == 1)
{S1=1;
}
if(car2 == 1)
{S2=1;
}
if(car3 == 1)
{S3=1;
}

if(front == 1)
{
    F1=1;
}
if(back == 1)
{
    F2=1;
}

}
void delay(unsigned int time)
{
    unsigned int i;
    unsigned char j;
    for(i=0; i<time; i++)
    {
        for (j=0; j<135; j++);
    }
}
void lcd_cmd(unsigned char value)
{
    ldata = value;
    RS = 0;
    RW=0;
    EN=1;
    delay(1);
    EN=0;
 }
void lcd_data(unsigned char letter)
{
    ldata=letter;
    RS=1;
    RW=0;
    EN=1;
    delay(1);
    EN=0;
}
void lcd_d1(unsigned int x)
{
    ldata=x;
    RS=1;
    RW=0;
    EN=1;
    delay(1);
    EN=0;
}
void slots()
{
    total=S1+S2+S3;
    if(total==2)
       {
       EN =0;
      lcd_cmd(0x38);
      lcd_cmd(0x0C);
      lcd_cmd(0x0E4);
      lcd_d1('1');
      lcd_d1(' ');
      lcd_d1(' ');
      lcd_d1(' ');
       }
    if(total==1)
       {
       EN =0;
      lcd_cmd(0x38);
      lcd_cmd(0x0C);
      lcd_cmd(0x0E4);
      lcd_d1('2');
      lcd_d1(' ');
      lcd_d1(' ');
      lcd_d1(' ');
       }
    if(total==0)
       {
       EN =0;
      lcd_cmd(0x38);
      lcd_cmd(0x0C);
      lcd_cmd(0x0E4);
      lcd_d1('3');
      lcd_d1(' ');
      lcd_d1(' ');
      lcd_d1(' ');
       }
}
void always()
{
    EN =0;
      delay(5);
      lcd_cmd(0x38);
      delay(5);
      lcd_cmd(0x0C);
      delay(5);
      lcd_cmd(0x80);
      delay(5);
      lcd_data('C');
      lcd_data('A');
      lcd_data('R');
      lcd_data(' ');
      lcd_data('P');
      lcd_data('A');
      lcd_data('R');
      lcd_data('K');
      lcd_data('I');
      lcd_data('N');
      lcd_data('G');
      lcd_data(' ');
      lcd_data('S');
      lcd_data('Y');
      lcd_data('S');
      lcd_data('T');
      lcd_data('E');
      lcd_data('M');
    
}
void status1()
{
    
     if(S1==1&&S2==1&&S3==1)
    {
         EN =0;
      delay(5);
      lcd_cmd(0x38);
      delay(5);
      lcd_cmd(0x0C);
      delay(5);
      lcd_cmd(0x0D4);
      delay(5);
      lcd_data('A');
      lcd_data('L');
      lcd_data('L');
      lcd_data(' ');
      lcd_data('S');
      lcd_data('L');
      lcd_data('O');
      lcd_data('T');
      lcd_data('S');
      lcd_data(' ');
      lcd_data('A');
      lcd_data('R');
      lcd_data('E');
      lcd_data(' ');
      lcd_data('B');
      lcd_data('O');
      lcd_data('O');
      lcd_data('K');
      lcd_data('E');
      lcd_data('D');
    }
     else
     {
          EN =0;
      delay(5);
      lcd_cmd(0x38);
      delay(5);
      lcd_cmd(0x0C);
      delay(5);
      lcd_cmd(0x0D4);
      delay(5);
      lcd_data('A');
      lcd_data('V');
      lcd_data('A');
      lcd_data('I');
      lcd_data('L');
      lcd_data('A');
      lcd_data('B');
      lcd_data('L');
      lcd_data('E');
      lcd_data(' ');
      lcd_data('S');
      lcd_data('L');
      lcd_data('O');
      lcd_data('T');
      lcd_data('S');
      lcd_data('=');
      
     }
}
void status2()
{
    if(S1==1)
    {
      EN =0;
      delay(5);
      lcd_cmd(0x38);
      delay(5);
      lcd_cmd(0x0C);
      delay(5);
      lcd_cmd(0x0C0);
      delay(5);
      lcd_data('S');
      lcd_data('1');
      lcd_data('=');
      lcd_data('F');
      lcd_data('I');
      lcd_data('L');
      lcd_data('L');
      lcd_data(' ');
      lcd_data(',');
    }
    else
    {
        EN =0;
      delay(5);
      lcd_cmd(0x38);
      delay(5);
      lcd_cmd(0x0C);
      delay(5);
      lcd_cmd(0xC0);
      delay(5);
      lcd_data('S');
      lcd_data('1');
      lcd_data('=');
      lcd_data('E');
      lcd_data('M');
      lcd_data('P');
      lcd_data('T');
      lcd_data('Y');
      lcd_data(',');
    }
}
void status3()
{
     if(S2==1)
    {
      EN =0;
      delay(5);
      lcd_cmd(0x38);
      delay(5);
      lcd_cmd(0x0C);
      delay(5);
      lcd_cmd(0x0C9);
      delay(5);
      lcd_data('S');
      lcd_data('2');
      lcd_data('=');
      lcd_data('F');
      lcd_data('I');
      lcd_data('L');
      lcd_data('L');
      lcd_data(' ');
    }
    else
    {
        EN =0;
      delay(5);
      lcd_cmd(0x38);
      delay(5);
      lcd_cmd(0x0C);
      delay(5);
      lcd_cmd(0x0C9);
      delay(5);
      lcd_data('S');
      lcd_data('2');
      lcd_data('=');
      lcd_data('E');
      lcd_data('M');
      lcd_data('P');
      lcd_data('T');
      lcd_data('Y');
    }   
}
void status4()
{
     if(S3==1)
    {
      EN =0;
      delay(5);
      lcd_cmd(0x38);
      delay(5);
      lcd_cmd(0x0C);
      delay(5);
      lcd_cmd(0x94);
      delay(5);
      lcd_data('S');
      lcd_data('L');
      lcd_data('0');
      lcd_data('T');
      lcd_data('3');
      lcd_data('=');
      lcd_data('F');
      lcd_data('I');
      lcd_data('L');
      lcd_data('L');
      lcd_data('E');
      lcd_data('D');
      
    }
     else
    {
        EN =0;
      delay(5);
      lcd_cmd(0x38);
      delay(5);
      lcd_cmd(0x0C);
      delay(5);
      lcd_cmd(0x94);
      delay(5);
      lcd_data('S');
      lcd_data('L');
      lcd_data('0');
      lcd_data('T');
      lcd_data('3');
      lcd_data('=');
      lcd_data('E');
      lcd_data('M');
      lcd_data('P');
      lcd_data('T');
      lcd_data('Y');
      lcd_data(' ');
    }
}
void clk()
{
    if(F1==0&&F2==0)
    {
 
         
         c2=1;    
         c1=0;
    }
    
}
void anti()
{
    if(F1==1||F2==1)
    {     
        c1=1;
        c2=0;  
        
    }
   
}