Biometric fingerprint based voting machine

[kishore]

My project is Biometric fingerprint based voting machine, here i have control unit and ballot unit. iam using SM630 fingerprint module ie interface with control unit and in ballot unit the voter can vote and at last the result is displayed on 16×2 LCD. i want the hard copy of the output or the result which is displayed on LCD. here at present iam using at89c51 in both control unit and ballot unit, i know i have to change the IC what to choose, suggest me. How to connect a printer to the ballot unit or how to send the output to PC for printing the data.

Code for ballot unit:

 

 

#include<reg51.h>

#define msec 50

#define lcd_data_str_pin P2 

sbit rs = P3^0;  

sbit rw = P3^1;  

sbit en = P3^2;  

sbit ini_pin = P1^0; 

sbit stop_pin = P1^5; 

 

sbit candidate_1=P1^1;  

sbit candidate_2=P1^2;  

sbit candidate_3=P1^3; 

sbit candidate_4=P1^4;

sbit candidate_5=P1^6;

sbit candidate_6=P1^7;   

int max =0;

int carry = 0;

int arr[6];

 

int vote_amt[3],j;

unsigned int vote_1,vote_2,vote_3,vote_4,vote_5,vote_6;

 

void delay(int delay_time)  

{

int j,k;

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

  for(k=0;k<=1275;k++);

}

 

void lcd_cmd(unsigned char cmd_addr)  

{

lcd_data_str_pin = cmd_addr;

en = 1;

rs = 0;

rw = 0;

delay(5);

en = 0;

return;

}

 

void lcd_data_str(char str[50])  

{ 

int p;

for (p=0;str[p]!=’’;p++)

{

  lcd_data_str_pin = str[p];

  rw = 0;

  rs = 1;

  en = 1;

  delay(5);

  en = 0;

}

return;

}

 

void lcd_data_int(unsigned int vote)  

{ 

char dig_ctrl_var;

int p;

for (j=2;j>=0;j–)

{

  vote_amt[j]=vote%10;

  vote=vote/10;

}

for (p=0;p<=2;p++)

{

  dig_ctrl_var = vote_amt[p]+48;

  lcd_data_str_pin = dig_ctrl_var;

  rw = 0;

  rs = 1;

  en = 1;

  delay(5);

  en = 0;

}

return;

} 

 

void vote_count()  

{

while (candidate_1==0 && candidate_2==0 && candidate_3==0 && candidate_4==0 && candidate_5==0 && candidate_6==0);

if (candidate_1==1)

{

  while (candidate_1 == 1);

   {

    vote_1++;

   }

}

if (candidate_2==1)

{

  while (candidate_2 == 1);

   {

    vote_2++;

   }

}

if (candidate_3==1)

{

  while (candidate_3 == 1);

   {

    vote_3++;

   }

}

if (candidate_4==1)

{

  while (candidate_4 == 1);

   {

    vote_4++;

   }

}

if (candidate_5==1)

{

  while (candidate_5 == 1);

   {

    vote_5++;

   }

}

if (candidate_6==1)

{

  while (candidate_6 == 1);

   {

    vote_6++;

   }

}

}

void lcd_ini()

{

lcd_cmd(0x38);

delay(msec);

lcd_cmd(0x0E);

delay(msec);

lcd_cmd(0x01);

delay(msec);

lcd_cmd(0x83);

delay(msec);

lcd_data_str(“Welcome!!!”);

delay(150);

lcd_cmd(0x01);

delay(msec);

lcd_cmd(0x80);

delay(msec);

lcd_data_str( “Press” );

delay(msec);

lcd_cmd(0x14);

delay(msec);

lcd_data_str(“button”);

delay(msec);

 

delay(msec);

lcd_cmd(0xC0);

delay(msec);

lcd_data_str(“to”);

delay(msec);

lcd_cmd(0x14);

delay(msec);

lcd_data_str(“vote”);

delay(100);

lcd_cmd(0x01);

delay(msec);

lcd_cmd(0x82);

delay(msec);

lcd_data_str(“P1”);

delay(msec);

lcd_cmd(0x87);

delay(msec);

lcd_data_str(“P2”);

delay(msec);

lcd_cmd(0x8C);

delay(msec);

lcd_data_str(“P3”);

delay(msec);

lcd_cmd(0xC2);

delay(msec);

lcd_data_str(“P4”);

delay(msec);

lcd_cmd(0xC7);

delay(msec);

lcd_data_str(“P5”);

delay(msec);

lcd_cmd(0xCC);

delay(msec);

lcd_data_str(“P6”);

delay(msec);

 

vote_count();

lcd_cmd(0x01);

delay(msec);

lcd_cmd(0x83);

delay(msec);

lcd_data_str(“Thank”);

delay(msec);

lcd_cmd(0x14);

delay(msec);

lcd_data_str(“You!!”);

delay(100);

}

  

void results()  

{

int i;

carry = 0;

lcd_cmd(0x01);

delay(msec);

lcd_cmd(0x80);

delay(msec);

lcd_data_str(“Results”);

delay(msec);

lcd_cmd(0x14);

delay(msec);

lcd_data_str(“Are”);

delay(msec);

lcd_cmd(0x14);

delay(msec);

lcd_data_str(“Out”);

delay(msec);

 

lcd_cmd(0x01);

lcd_cmd(0x80);

delay(msec);

lcd_data_str(“P1”);

delay(msec);

lcd_cmd(0x83);

lcd_data_int(vote_1);

delay(msec);

lcd_cmd(0x8A);

delay(msec);

lcd_data_str(“P2”);

lcd_cmd(0x8D);

delay(msec);

lcd_data_int(vote_2);

delay(msec);

lcd_cmd(0xC0);

lcd_data_str(“P3”);

delay(msec);

lcd_cmd(0xC3);

delay(msec);

lcd_data_int(vote_3);

delay(msec);

lcd_cmd(0xCA);

delay(msec);

lcd_data_str(“P4”);

delay(msec);

lcd_cmd(0xCD);

delay(msec);

lcd_data_int(vote_4);

delay(250);

lcd_cmd(0x01);

lcd_cmd(0x80);

lcd_data_str(“P5”);

delay(msec);

lcd_cmd(0x83);

delay(msec);

lcd_data_int(vote_5);

delay(msec);

lcd_cmd(0x8A);

delay(msec);

lcd_data_str(“P6”);

delay(msec);

lcd_cmd(0x8D);

delay(msec);

lcd_data_int(vote_6);

delay(300);

 

arr[0] = vote_1;

arr[1] = vote_2;

arr[2] = vote_3;

arr[3] = vote_4;

arr[4] = vote_5;

arr[5] = vote_6;

for( i=0; i<6; i++)

{

  if(arr>=max)

  max = arr;

}

 

if ( (vote_1 == max) && ( vote_2 != max) && (vote_3 != max)&& (vote_4 != max)&& (vote_5!= max)&& (vote_6!= max) )

{

  carry = 1;

  lcd_cmd(0x01);

  delay(msec);

  lcd_cmd(0x82);

  delay(msec);

  lcd_data_str(“Hurray!!!”);

  delay(50);

  lcd_cmd(0xC4);

  delay(msec);

  lcd_data_str(“P1”);

  delay(msec);

  lcd_cmd(0x14);

  delay(msec);

  lcd_data_str(“wins”);

  delay(msec);

  return;

}

 

if ( (vote_2 == max) && ( vote_1 != max) && (vote_3 != max)&& (vote_4 != max&& (vote_5!= max)&& (vote_6!= max)) )

{

  carry = 1;

  lcd_cmd(0x01);

  delay(msec);

  lcd_cmd(0x82);

  delay(msec);

  lcd_data_str(“Hurray!!!”);

  delay(50);

  lcd_cmd(0xC4);

  delay(msec);

  lcd_data_str(“P2”);

  delay(msec);

  lcd_cmd(0x14);

  delay(msec);

  lcd_data_str(“wins”);

  delay(msec);

  return;

}

 

if ( (vote_3 == max) && ( vote_2 != max) && (vote_1 != max)&& (vote_4 != max)&& (vote_5!= max)&& (vote_6!= max) )

{

  carry = 1;

  lcd_cmd(0x01);

  delay(msec);

  lcd_cmd(0x82);

  delay(msec);

  lcd_data_str(“Hurray!!!”);

  delay(50);

  lcd_cmd(0xC4);

  delay(msec);

  lcd_data_str(“P3”);

  delay(msec);

  lcd_cmd(0x14);

  delay(msec);

  lcd_data_str(“wins”);

  delay(msec);

  return;

}

 

if ( (vote_4 == max) && ( vote_2 != max) && (vote_3 != max)&& (vote_1 != max)&& (vote_5!= max)&& (vote_6!= max) )

{

  carry = 1;

  lcd_cmd(0x01);

  delay(msec);

  lcd_cmd(0x82);

  delay(msec);

  lcd_data_str(“Hurray!!!”);

  delay(50);

  lcd_cmd(0xC4);

  delay(msec);

  lcd_data_str(“P4”);

  delay(msec);

  lcd_cmd(0x14);

  delay(msec);

  lcd_data_str(“wins”);

  delay(msec);

  return;

}

if ( (vote_5 == max) && ( vote_2 != max) && (vote_3 != max)&& (vote_1 != max)&& (vote_4!= max)&& (vote_6!= max) )

{

  carry = 1;

  lcd_cmd(0x01);

  delay(msec);

  lcd_cmd(0x82);

  delay(msec);

  lcd_data_str(“Hurray!!!”);

  delay(50);

  lcd_cmd(0xC4);

  delay(msec);

  lcd_data_str(“P5”);

  delay(msec);

  lcd_cmd(0x14);

  delay(msec);

  lcd_data_str(“wins”);

  delay(msec);

  return;

}

if ( (vote_6 == max) && ( vote_2 != max) && (vote_3 != max)&& (vote_1 != max)&& (vote_4!= max)&& (vote_5!= max) )

{

  carry = 1;

  lcd_cmd(0x01);

  delay(msec);

  lcd_cmd(0x82);

  delay(msec);

  lcd_data_str(“Hurray!!!”);

  delay(50);

  lcd_cmd(0xC4);

  delay(msec);

  lcd_data_str(“P6”);

  delay(msec);

  lcd_cmd(0x14);

  delay(msec);

  lcd_data_str(“wins”);

  delay(msec);

  return;

}

 

if (carry==0)

{

  lcd_cmd(0x01);

  delay(msec);

  lcd_cmd(0x82);

  delay(msec);

  lcd_data_str(“clash”);

  delay(50);

  lcd_cmd(0x14);

  delay(msec);

  lcd_data_str(“between!!!”);

  delay(50);

  if(vote_1 == max)

  {

   lcd_cmd(0xC0);

   lcd_data_str(“P1”);

   delay(50);

  }

  if(vote_2 == max)

  {

   lcd_cmd(0xC3);

   lcd_data_str(“P2”);

   delay(50);

  }

  if(vote_3 == max)

  {

   lcd_cmd(0xC6);

   lcd_data_str(“P3”);

   delay(50);

  }

  if(vote_4 == max)

  {

   lcd_cmd(0xC8);

   lcd_data_str(“P4”);

   delay(50);

  }

  if(vote_5 == max)

  {

   lcd_cmd(0xCB);

   lcd_data_str(“P5”);

   delay(50);

  }

  if(vote_6 == max)

  {

   lcd_cmd(0xCE);

   lcd_data_str(“P6”);

   delay(50);

  }

}

}

 

void main()

{

ini_pin = stop_pin = 1;

vote_1 = vote_2 = vote_3 = vote_4= vote_5 = vote_6 = 0;

candidate_1 = candidate_2 = candidate_3 = candidate_4 = candidate_5 = candidate_6 = 0;

lcd_cmd(0x38);

delay(msec);

lcd_cmd(0x0E);

delay(msec);

lcd_cmd(0x01);

delay(msec);

delay(100);

while(1)

{

  while(ini_pin != 0)

  {

   if (stop_pin == 0)

   break;

  }

  if (stop_pin == 0)

  {

  break;

  }

  lcd_ini();

}

 

while(1)

{

results();

}

}

 

 

 

 Help me for the codes to send the output of µc to pc for printing the data and suggest me which µc i should use because the code size is limited.

[AJISH ALFRED]

Hi Kishore,

I wonder why you want to change the IC. This looks like a very small code, there is no large array decleration or any memory related issues. This should be easily fit into your 8051 microcontroller.

[kishore]

Sir, if we want to send data through SBUF to pc, we just put in an array like p[]=” xyz”;

but i have 6 variables P1-P6 whose values and max among that is calaulated, i have to send that, but how????

 

 

[AJISH ALFRED]

Create a charcter array of 6 variables. Use a for loop to loop through the variables of the array and and write to the SBUF inside each looping.

 

This is to give you an idea,

 

char x [6] = {‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’};

 

for (i=0,i<5,i++)

  SBUF = x;

[kishore]

Previous comment was helpfull. Another problem iam facing that, in my voting machine i ‘hv P1 to P6 candidates, if i give my vote to P2 then i want to print in a paper that i voted to candidate P2.  like in ATM when we take money, a small piece of paper comes which shows the balance and many info.

Eg Small Printer used by bus conductor to print ticket. 

with this idea i want to add a small printer in my Voting machine to print  ” To which candidate i Voted”.

 

Give me some idea how to do this. Suggest me if there is any module for printing. 

[AJISH ALFRED]

Yes, its called “mini thermal printer”. You can google it for an  online purchase.

 

[kishore]

How to interface the mini thermal printer with 8051

[kishore]

in the above program i made voting machine for 6 candidate, if i increase to 8 some error in showing in Keil like
Program size: data=54.0 xdata=0 code=2834
0 warning 0 error
Fatal error L250: code size limit in restricted version exceeded
limit 0800h bytes
Target not created
what should i do for this error

[Author]

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