RFID Attendance System

[SUnny]

RFID Attendance System

Hi i m trying to build a Rfid attendance system using 8051(AT89C52). Could someone please tell me what is wrong with code as it compiles without error but woudnt simulate on proteus and also how accurate is proteus compared to real life testing. I am also trying to interface a RTC(DS1307) if someone could help that it would be great aswell.

 

#include <reg51.h>

#include <string.h>

 

 

 

#define TOTAL 5

void delay_msec(int);

void lcd_init();

void lcd_data(char);

void send(char);

void lcd_cmd(char);

void lcd_dataS(char *p);

void lcd_data_int(int);

 

sbit rs=P2^0;

sbit en=P2^1;

 

 

 void serial_init();

 void serial_txS(char *);

 void serial_tx(char);

 void checkID();

 void printOnTerminal();

 short int checkTodaysAttd(int);

 

 sbit ON=P1^0;

 sbit RESET=P1^1;

 sbit result=P1^2;

 sbit IR_Tx=P1^3;

 sbit IR_Rx=P1^4;

 sbit Reset_Todays_Attendence=P1^5;

 

 

void lcd_init()

{    

 delay_msec(20);

 send(0x30);   

 delay_msec(10);  

 send(0x30);

 delay_msec(1);

 send(0x30);

 delay_msec(1); 

 send(0x20);

 delay_msec(1); // upto here we call it as RESETting of LCD, 

                // and telling the LCD that we are using 4bit mode

 

 lcd_cmd(0x06);

 lcd_cmd(0x01);

 lcd_cmd(0x28);

 lcd_cmd(0x0e);

}

 

void send(char value)

{

char temp;

 temp= P2 & 0x0f; //store the higher nibble of P2 in temp

 P2= temp | value;  //now bitwise OR the value with temp,

            //which successfully sends data(higher nibble) to P2 without 

            //effecting its prevoius data in the lower nibble

 en=1;

 delay_msec(1);

 en=0;

}

 

 

void lcd_cmd(char cmd)

{

 char temp;

 temp=cmd &0xf0; //masks (makes zero) the lower nibble

 rs=0;

 send(temp);  //now send the higher nibble

 temp=cmd<<4;    //now left shift 4 times which shifts lower

          //nibble to higher nibble

 temp=temp&0xf0;  //now mask lower nibble again

 send(temp);   //and send to the LCD

}

 

/*

void lcd_data(char d)

{

 char temp;

 temp=d &0xf0;

 rs=1;

 send(temp);

 temp=d<<4;

 temp=temp&0xf0;

 send(temp);

} */

 

 

void lcd_dataS(char *p)

{

  char temp;

  while(*p!=’’)

  { 

  rs=1;

 temp=(*p) & 0xf0;

 send(temp);

 temp=(*p) << 4;

 temp=temp & 0xf0;

 send(temp);

 p=p+1;

  }

}

 

void lcd_data_int(int value)

{

  int a[3]={0,0,0},i=0,temp;

  while((value/10)!=0)

  {

   a=48+value%10;

   i++;

   value=value/10;

  }

  a=48+value;

 

  for(i=2;i>=0;i–)

  {

    rs=1;

 temp= a & 0xf0;

 send(temp);

 temp=(a << 4) & 0xf0;

 send(temp);

  }

}

 

void delay_msec(int n)

{

 int i,j;

 for(j=0;j<n;j++)

 for(i=0;i<921;i++);

}

struct details

 {

   char *name;

   char id[4];

   int count;

 }emp[TOTAL]={{“Sunny”, “431a”, 0},

          {“Sunny1”,     “456p”, 0},

          {“Sunny2”, “111”, 0},

          {“Sunny3”,   “123”, 0},

          {“Sunny4”,    “145”, 0}};

 

 char recieved_id[4]={0};

 int i, no_of_stu=0, todays_count=0;

 int todays_ids[4]={0};

 short int access=0, gotID=0;

 

 void serial() interrupt 4

 {

   EA=0;

     for(i=0;i<4;i++)

      {

        while(RI==0);

        recieved_id=SBUF;

        RI=0;

      }

      gotID=1;

   EA=1;

 }

void checkID()

{

  access=0;               //like a flag

  lcd_dataS(recieved_id);

  i=0;

if(( strcmp(emp.id , recieved_id) )==0)

     { 

      if(checkTodaysAttd(i)) 

          {

              access=1;

              lcd_cmd(0x01);

              lcd_dataS(“welcome”);

              lcd_cmd(0xc0);

              lcd_dataS(emp.name);

              emp.count++;

 

            todays_ids[todays_count]=i+1;

                 todays_count++;

 

            delay_msec(400);

            printOnTerminal();

            gotID=0;

              //break;

          }

       else

         {

           lcd_cmd(0x01);

           lcd_dataS(“your turns over”);

           gotID=0;

           delay_msec(400);

         }

     }

    

 

 

   if(access==0)

    {

        lcd_cmd(0x01);

        lcd_dataS(“access denied”);

        delay_msec(100);

        gotID=0;

    }    

}

 

short int checkTodaysAttd(int id)

{

  short int d;

  d=0;

  if(id==(todays_ids[d]-1))

   {

    return 0;    //return 0 if specific ID has already been

   }            //counted for today.

  return 1;

}

 

void printOnTerminal()

{ EA=0;

  serial_tx(‘r’);

  serial_tx(‘n’);

  serial_txS(emp.name);

  serial_tx(‘ ‘);

  serial_txS(emp.id);

  serial_tx(‘ ‘);

  serial_tx(emp.count+48);

  EA=1;

}  

 

void serial_init()

{

  TMOD=0x20;

  TH1=0xfd;

  SCON=0x50;

  TR1=1;

}

 

void serial_txS(char *p)

{

  while((*p)!=’’)

  {

    SBUF=*p;

    while(TI==0);

    TI=0;

    p++;

  }

}

 

void serial_tx(char x)

{

  SBUF=x;

  while(TI==0);

  TI=0;

} 

//***********************************

---

void main()

  {

    ON = 1;

RESET = 1;

result = 1;

    rs= 0; 

en=0;

    P2=0x00;

    IR_Rx=1;

    IR_Tx=0;

    EA=1;

    ES=1;

    serial_init();

    lcd_init();

 

start:    

   while(1)

     {

     IR_Tx=0;

     lcd_cmd(0x01);

 

       while(!ON)

       { 

        lcd_cmd(0x01);

        IR_Tx=1;

         while(!(IR_Rx==1))

         {

          lcd_cmd(0x01);

          lcd_dataS(“ID please”);

          

          while(gotID==0)   //wait until any card is shown

            if(ON==1)

{

goto start;

          }

          checkID();    

         }

       }

      /////////////////////////

       while(!result)

        {

          for(i=0;i<=TOTAL;i++)

          {

            lcd_cmd(0x01);

            lcd_dataS(emp.name);

            lcd_cmd(0xc0);

            lcd_data_int(emp.count);

            delay_msec(500);

          }

        }

      ////////////////////////

 

       while(! Reset_Todays_Attendence)

        {

          i=0;

 

          todays_count=0;

          lcd_cmd(0x01);

          lcd_dataS(“todays attd rst”);

          delay_msec(100);

        }

      ///////////////////////

      }    //end of  loop

 } //end of main

Please note: This not my code but i rectfied it to my needs.

 

[AJISH ALFRED]

Hi,

I would suggest not to waste your time on simulation software if you are planning to try it out in real hardware

[SUnny]

Thanks, but would the code be alright for real life testing?

[Ashutosh Bhatt]

i wonder how you simulate RFID reader in proteus?

there is no way.

you can check only LDC or hardware push buttons in proteus

[SUnny]

You can, by putting a virtual terminal onto RX/TX pins of the micro. Have managed to get the code working with RTC aswell now. 

 

Thanks

[AJISH ALFRED]

Thats great!

[Ashutosh Bhatt]

i know virtual terminal available in proteus

but you can not use it to work as RFID reader. its simple serial terminal

it is provided for simulation of serial communication with PC or other micro controllers/processors

if you are using it in place of RFID reader then its based on simple assumption

[Author]

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