[ghuran]

Hi sachin,

               sorry for the delay,i was busy in my practical exam….

               here is the tested code for rfid based toll plaza….

 

 

                #include<reg51.h>

#define port P1

#define key P0   // Port for keypad

 void memory();

 

 sfr lcd_data_pin=0x80;

 sbit rs = P3^5;

 sbit rw = P3^6;

 sbit en = P3^7;

 

 sbit col1=key^4;

 sbit col2=key^5;

 sbit col3=key^6;

 sbit row1=key^0;

 sbit row2=key^1;

 sbit row3=key^2;

 sbit row4=key^3;

 unsigned int number=0,pointer=1;

 unsigned char card_mem[4][12];

 unsigned char card_id[12],index=0,key1=0,lcd,print=0,new_user=0,recharge=0,user_index,t,tool=0;

 unsigned int amount[4];

 unsigned char current_byte = 0,money[6];

 unsigned char pos=0,set=0;

 

void delay(unsigned char count) //Function to provide time delay

{

  unsigned int j;

unsigned char i;

  for(i=0;i<count;i++)

  for(j=0;j<1275;j++);

}

 

void lcd_command(unsigned char comm)   //LCD command funtion 

{

  lcd_data_pin=comm;

  en=1;

  rs=0;

  rw=0;

  delay(5);

  en=0;

}

 

void lcd_data(unsigned char disp)  //LCD data function 

{

  lcd_data_pin=disp;

  en=1;

  rs=1;

  rw=0;

  delay(5);

  en=0;

}

 

lcd_string(unsigned char *disp) //LCD string function 

{

  char x;

  for(x=0;disp[x]!=’’;x++)

{

  lcd_data(disp[x]);

}

}

 

void lcd_ini()  //Function to initialize the LCD

{

lcd_command(0x38);   

delay(5);

lcd_command(0x0E);        

delay(5);

lcd_command(0x01);

delay(5);

lcd_command(0x06);

delay(5);

 

}

 

lcd_display(unsigned int val)

{

unsigned char flg=0;

lcd_command(0xCC);

if(val==0)

lcd_data(‘0’);

while(val>0)

{ 

lcd=val%10;

val=val/10;

lcd_command(0xCC-flg);

lcd_data(lcd+’0′);

flg++;

}

}

 

 

void recieve() interrupt 4 //Function to recieve data serialy from RS232 

{

card_id[current_byte]=SBUF;

RI=0; // Reset the serial interrupt after recieving the byte

current_byte++;

}

 

void display(unsigned char value)

{

lcd_command(0x80+pos);

if(value==10)

{

print=1; 

}

if(value==12)

{

set=1; 

}

if(value<=9)

{

lcd_data(‘0’+value);

money[pos]=value;

pos++;

}

}

 

check_col1()

{

row1=row2=row3=row4=1;

row1=0;

if(col1==0)

display(1);

row1=1;

row2=0;

if(col1==0)

display(4);

row2=1;

row3=0;

if(col1==0)

display(7);

row3=1;

row4=0;

if(col1==0)

display(10);

row4=1;

}

 

check_col2()

{

row1=row2=row3=row4=1;

row1=0;

if(col2==0)

display(2);

row1=1;

row2=0;

if(col2==0)

display(5);

row2=1;

row3=0;

if(col2==0)

display(;

row3=1;

row4=0;

if(col2==0)

display(0);

row4=1;

}

 

check_col3()

{

row1=row2=row3=row4=1;

row1=0;

if(col3==0)

display(3);

row1=1;

row2=0;

if(col3==0)

display(6);

row2=1;

row3=0;

if(col3==0)

display(9);

row3=1;

row4=0;

if(col3==0)

display(12);

row4=1;

}

 

keypad()

{

row1=row2=row3=row4=0;

if(col1==0)

check_col1();

if(col2==0)

check_col2();

if(col3==0)

check_col3();

}

  

void show()

{

unsigned char count,i,key,val,flag=0,in;

unsigned int balance,j;

TMOD=0x00; //Enable Timer 1

TH1=0x00;

SCON=0x00;

TR1=0;

IE=0x00; 

lcd_command(0x01);

val=index;

for(i=0;i<index;i++)

{ 

key=0;

for(count=0;count<12;count++)

{ 

if(card_id[count]==card_mem[count])

{

key++;

}

}

if(key==12)

{

flag=1;

if(amount<=10)

{

user_index=i;

lcd_string(“Insuff. balance”);

lcd_command(0xC0);

lcd_string(“Pls recharge”);

delay(250);

lcd_command(0x01);

lcd_string(“To recharge”);

lcd_command(0xC0);

lcd_string(“press *”);

for(in=0;in<250;in++)

{

for(j=0;j<1275;j++)

{

row1=row2=row3=row4=0;

if(col1==0)

{

tool=1;

recharge=1;

t=1;

keypad();

break;

}

}

if(t==1)

break;

}

lcd_command(0x01);

lcd_string(“Pls scan your ID”);

break;  

}

if(tool==0)

{

lcd_string(“Thank you User “);

lcd_command(0x8F);

lcd_data(49+i);

delay(250);

lcd_command(0x01);

lcd_string(“Charges 10.00”);

amount=amount-10;

lcd_command(0xC0);

lcd_string(“Amt left  “);

balance=amount;

lcd_display(balance);

lcd_command(0xCD);

lcd_string(“.00”);

delay(250);

lcd_command(0x01);

if(amount<=30)

{

user_index=i;

lcd_string(“Pls recharge”);

lcd_command(0xC0);

lcd_string(“your account”);

delay(250);

lcd_command(0x01);

lcd_string(“To recharge”);

lcd_command(0xC0);

lcd_string(“press *”);

for(in=0;in<250;in++)

{

for(j=0;j<1275;j++)

{

row1=row2=row3=row4=0;

if(col1==0)

{

recharge=1;

t=1;

keypad();

break;

}

}

if(t==1)

break;

} 

}

}

t=0;

lcd_command(0x01);

lcd_string(“Pls scan your ID”); 

break;

}

}

if(flag==0)

{

lcd_string(“Wrong ID”);

delay(100);

}

if(flag==0)

{

lcd_command(0x01);

lcd_string(“New user press *”);

new_user=1;

}

current_byte=0;

tool=0;

TMOD=0x20; //Enable Timer 1

TH1=0xFD;

SCON=0x50;

TR1=1;

IE=0x94;

}

 

recharge_acc()

{

unsigned char pin;

lcd_command(0x01);

lcd_string(“Pls enter the”);

lcd_command(0xC0);

lcd_string(“Balance”);

delay(250);

lcd_command(0x01);

while(set!=1)

{

keypad();

delay(40); 

}

set=0;

lcd_command(0x01);

lcd_string(“Your balance is”);

for(pin=0;pin<=pos;pin++)

{

number=number+money[pos-pin-1]*pointer;

pointer=pointer*10;

}

amount[user_index]=amount[user_index]+number;

lcd_command(0xC0);

lcd_display(amount[user_index]);

lcd_command(0xCD);

lcd_string(“.00”);

delay(250);

lcd_command(0x01);

number=0;

pointer=1;

pos=0;

lcd_string(“Pls scan your ID”);

}

 

void memory()

{

unsigned char i,key=0,count,pin,try=0;

lcd_command(0x01);

lcd_string(“New user scan ID”);

current_byte=0;

while(current_byte!=12);

for(i=0;i<4;i++)

{ 

key=0;

for(count=0;count<12;count++)

{ 

if(card_id[count]==card_mem[count])

{

key++;

}

}

if(key==12)

{

lcd_command(0x01);

lcd_string(“Sorry ! You are”);

lcd_command(0xC0);

lcd_string(“already an user”); 

delay(200);

lcd_command(0x01);

lcd_string(“Pls scan your ID”);

key=0;

try=1;

current_byte=0;

break;

}

}

if(key<12 && try==0)

{

key=0;

for(i=0;i<12;i++)

{

card_mem[index]=card_id;

}

current_byte=0;

lcd_command(0x01);

lcd_string(“Pls scan again”);

while(current_byte!=12);

for(i=0;i<12;i++)

{

if(card_mem[index]==card_id)

{

key++;

}

}

current_byte=0;

TMOD=0x00;

TH1=0x00;

SCON=0x00;

TR1=0;

IE=0x00; 

if(key==12)

{

lcd_command(0x01);

lcd_string(“Congratulation !”);

lcd_command(0xC0);

lcd_string(“You are User”);

lcd_command(0xCC);

lcd_data(index+49);

delay(250);

lcd_command(0x01);

lcd_string(“Pls enter the”);

lcd_command(0xC0);

lcd_string(“Balance”);

delay(150);

lcd_command(0x01);

while(set!=1)

{

keypad();

delay(40); 

}

set=0;

lcd_command(0x01);

lcd_string(“Your balance is”);

for(pin=0;pin<=pos;pin++)

{        

number=number+money[pos-pin-1]*pointer;

pointer=pointer*10;

}

lcd_command(0xC0);

lcd_display(number);

lcd_command(0xCD);

lcd_string(“.00”);

amount[index]=number;

delay(250);

lcd_command(0x01);

number=0;

pointer=1;

pos=0;

lcd_string(“Pls scan your ID”);

}

else

{

lcd_command(0x01);

lcd_string(“ERROR”);

delay(200);

for(i=0;i<12;i++)

{

card_mem[index]=0;

}

lcd_command(0x01);

lcd_string(“Pls scan your ID”);

}

if(key==12)

index++;

}

TMOD=0x20; //Enable Timer 1

TH1=0xFD;

SCON=0x50;

TR1=1;

IE=0x94;

}

 

void main()

{

col1=col2=col3=1;

TMOD=0x20;

TH1=0xFD;

SCON=0x50;

TR1=1;

IE=0x94;

lcd_ini(); //Place cursor to second position of first line 

lcd_string(“Pls scan your ID”);

while(1)

{

row1=row2=row3=row4=0;

if(col1==0)

{ 

      delay(30);

      if(col1==0)      

            keypad();

             else;

}

if(print==1 && new_user==1)

{

memory();

print=0;

new_user=0;

}

if(print==1 && recharge==1)

{

recharge_acc();

print=0;

recharge=0;

}

if(current_byte==12)

{

show();

}

}

}

 

 

[ghuran]

Hi, 

      

         i hv successfully done my project, thanxx a lot to KHUSHI ma;m & DISHANT sir

 

             but i’m facing one problem with kepad, when i pressed the keyword it only print 1,4,7

               and for other keywords it prints after i pressed many times…..

                

                  pls let me know…

 

[ghuran]

Hi,

        khushi ma’m i hv done the simulation , on the lcd it prints “pls scan your id”, but after that it automatically takes 4 times 1369….

                       here is the simulation..

 

                      

wysiwyg_imageupload:12119:

[ghuran]

Hi,

    

       i have made the changes in programme  and it works,but it only print “pls scan your ID”

         and after that it prints “4 times 1369”. please refer the project “RFID BASED TOLL PLAZA”

            pls help me…!! 

[ghuran]

SHAH DISHANT H. sir

                            

                               i hv made the changes in the programme but i still get nothing.

 

                                  please help me out of this…

                                        thank u

[ghuran]

khushi ma’m

                         

                     i hv made d changes as u said, and i simulate the project on ‘proteus’ , but i still get nothing on LCD.

          can u please simulate it on proteus..

            

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