EngineersGarage

  • Engineers Garage Main Site
  • Visit our active EE Forums
    • EDABoard.com
    • Electro-Tech-Online
  • Projects & Tutorials
    • Circuits
    • Electronic Projects
    • Tutorials
    • Components
  • Digi-Key Store
    • Cables, Wires
    • Connectors, Interconnect
    • Discrete
    • Electromechanical
    • Embedded Computers
    • Enclosures, Hardware, Office
    • Integrated Circuits (ICs)
    • Isolators
    • LED/Optoelectronics
    • Passive
    • Power, Circuit Protection
    • Programmers
    • RF, Wireless
    • Semiconductors
    • Sensors, Transducers
    • Test Products
    • Tools
  • Advertise
You are here: Home / Replies / Proteus //Program for a

Proteus //Program for a

|

Microcontroller › 8051 › Help on RFID Toll plaza system based on vehicle category interface with 8051 microcontroller (AT89C51) › Proteus //Program for a

May 26, 2014 at 3:49 pm #11769
mohammed Fahad
Participant

wysiwyg_imageupload:12427:

//Program for a simple toll plaza system using low frequency RFID interfaced with 8051 microcontroller (AT89C51)
#include<reg51.h>
#define port P1
#define key P0  // Port for keypad
 void memory();
 
 sfr lcd_data_pin=0xA0;
 sbit rs = P1^3;
 sbit rw = P1^4;
 sbit en = P1^5;
 
 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(1);
  en=0;
}
 
void lcd_data(unsigned char disp)  //LCD data function 
{
  lcd_data_pin=disp;
  en=1;
  rs=1;
  rw=0;
  delay(1);
  en=0;
}
 
lcd_string(unsigned char *disp) //LCD string function 
{
  char x;
  for(x=0;disp[x]!=0;x++)
{
  lcd_data(disp[x]);
}
}
 
void lcd_ini()  //Function to initialize the LCD
{
lcd_command(0x38);   
delay(5);
lcd_command(0x0F);        
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(8);
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)
{
keypad();
}
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();
}
}
}

RSS Recent Posts

  • Can I make two inputs from one?? June 21, 2025
  • Beats Solo 4 June 21, 2025
  • Behlke swich June 21, 2025
  • Is AI making embedded software developers more productive? June 21, 2025
  • Simple LED Analog Clock Idea June 21, 2025

Stay Up To Date

Newsletter Signup
EngineersGarage

Copyright © 2025 WTWH Media LLC. All Rights Reserved. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media
Privacy Policy | Advertising | About Us

Search Engineers Garage

  • Engineers Garage Main Site
  • Visit our active EE Forums
    • EDABoard.com
    • Electro-Tech-Online
  • Projects & Tutorials
    • Circuits
    • Electronic Projects
    • Tutorials
    • Components
  • Digi-Key Store
    • Cables, Wires
    • Connectors, Interconnect
    • Discrete
    • Electromechanical
    • Embedded Computers
    • Enclosures, Hardware, Office
    • Integrated Circuits (ICs)
    • Isolators
    • LED/Optoelectronics
    • Passive
    • Power, Circuit Protection
    • Programmers
    • RF, Wireless
    • Semiconductors
    • Sensors, Transducers
    • Test Products
    • Tools
  • Advertise