***Controling Button :

This is the main head of all other buttons . Without having permission

of this button ,any button can't perform . Without permission it's

instructions will not be taken . This will be in the presiding officer's

room .Once he will press the button and all other buttons will be

permitted to perform for one time . If any key or button will be pressed

, it will perform for one time and it will disable the system to take

vote . So , one person will be able to vote for one time & voter

will not be able to do that without permission of PO . The video will

make clear about this .

***Status View Button :

For security we are hiding the voting status from voter and Only PO can

view this . At first PO have to press "Control Button " and LED 1 turns

on . Then will have to press "View Status" button and current status

will be shown only for a little time before getting back to the previous

stage with turning on LED2.

*** Result Button :

When OP decide to publish who is winner , he just need to press "control button" and after that need to press Final Result Button . After Showing result , it will be reset and all data will be erased .

***Candidate Category Button :

When control button gives permission , only one of "candidate button

category" buttons can perform, only for one time . After performing,

this will disable the system . Generally these buttons are incremented

by one during each action .

***LED 1 & LED 2 :

sbit LCD_RS at RB7_bit;  
 sbit LCD_EN at RB6_bit;  
 sbit LCD_D4 at RB5_bit;  
 sbit LCD_D5 at RB4_bit;  
 sbit LCD_D6 at RB3_bit;  
 sbit LCD_D7 at RB2_bit;  
 sbit LCD_RS_Direction at TRISB7_bit;  
 sbit LCD_EN_Direction at TRISB6_bit;  
 sbit LCD_D4_Direction at TRISB5_bit;  
 sbit LCD_D5_Direction at TRISB4_bit;  
 sbit LCD_D6_Direction at TRISB3_bit;  
 sbit LCD_D7_Direction at TRISB2_bit;  
 // End LCD module connections  
  short dat_can1=0,dat_can2=0,dat_can3=0,con=4;  
  char txt[]="        ";  
  char txt1[]="htp://www.pictutorial.net";  
  char txt2[]="    Digital Voting Machine";  
  int i=0,j=0,chk=10;  
  char c1i='0',c1j='0',c1k='0';  
  char c2i,c2j,c2k;  
  char c3i,c3j,c3k;  
  int can_1adrs =15; // Keeping memory address for Candidate 1  
  int can_2adrs =19;   // Keeping memory address for Candidate 2  
  int can_3adrs = 29;   // Keeping memory address for Candidate 3  
  int chkk = 33,aq=0,b=0,aa=0,bb=0,cc=0;  
  char thirdchar(short dk){         ////find third Char of Short Data  
   aq=dk/100;  
   aa=aq*100;  
   aa=dk-aa;  
   if(aq==0)  
   { aa=dk;  
    return '0'; }  
   if(aq==1) return '1';  
   if(aq==2) return '2';  
   if(aq==3) return '3';  
   if(aq==4) return '4';  
   if(aq==5) return '5';  
   if(aq==6) return '6';  
   if(aq==7) return '7';  
   if(aq==8) return '8';  
   if(aq==9) return '9';  
  }  
    char secondchar(short dk){  ////find Second Char of Short Data  
   b=aa/10;  
   bb=b*10;  
   bb=aa-bb;  
   if(b==0)  
   { bb=dk;  
    return '0'; }  
   if(b==1) return '1';  
   if(b==2) return '2';  
   if(b==3) return '3';  
   if(b==4) return '4';  
   if(b==5) return '5';  
   if(b==6) return '6';  
   if(b==7) return '7';  
   if(b==8) return '8';  
   if(b==9) return '9';  
  }  
  char firstchar(short dk){ ////find first Char of Short Data  
   if(bb==0) return '0';  
   if(bb==1) return '1';  
   if(bb==2) return '2';  
   if(bb==3) return '3';  
   if(bb==4) return '4';  
   if(bb==5) return '5';  
   if(bb==6) return '6';  
   if(bb==7) return '7';  
   if(bb==8) return '8';  
   if(bb==9) return '9';  
  }  
 void main() {  
  ADCON1=0x0F;  
  CMCON=7;  
  TRISA.F0=1;  
  TRISA.F1=1;  
  TRISA.F2=1;  
  TRISA.F3=1;  
  TRISA.F4=1;  
  TRISC.F0=0;  
  TRISC.F1=0;  
  TRISC.F2=1;  
  Lcd_Init();  
   Lcd_Cmd(_LCD_CLEAR);        // Clear display  
  Lcd_Cmd(_LCD_CURSOR_OFF);  
  /////////////////////// Lcd Scroling Display Start  
   for(i=0;i<19;i++){  
   Lcd_Out(1,1,txt1);  
   Lcd_Out(2,1,txt2);  
   Lcd_Cmd(_LCD_SHIFT_LEFT);  
   delay_ms(200);  
     }  
    Lcd_Cmd(_LCD_CLEAR);  
  /////////////////////// Lcd Scroling Display End  
     for(j=0;j<16;j++){  
     Lcd_Cmd(_LCD_CLEAR);  
     txt[j]='.';  
   Lcd_Out(1,1," Starting...");  
   Lcd_Out(2,1,txt);  
      delay_ms(300);  
     }  
 dat_can1 = EEPROM_Read(can_1adrs); // reading previous data if avail able for Candidate 1  
 c1i=thirdchar(dat_can1); ///third  
 c1j=secondchar(dat_can1); //second  
 c1k=firstchar(dat_can1);   //first  
 //// these functions should be called with this structure  
 /// I used this , because MikroC's short to str conversion didn't work .  
 dat_can2=EEPROM_Read(can_2adrs); // reading previous data if avail able for Candidate 2  
 c2i=thirdchar(dat_can2);  
 c2j=secondchar(dat_can1);  
 c2k=firstchar(dat_can1);  
 dat_can3=EEPROM_Read(can_3adrs);   // reading previous data if avail able for Candidate 2  
 c3i=thirdchar(dat_can3);  
 c3j=secondchar(dat_can1);  
 c3k=firstchar(dat_can1);  
 Lcd_Cmd(_LCD_CLEAR);  
 if(dat_can3<=0){    // check if it runs for the first time , then set data null or 0  
  EEPROM_Write(can_3adrs,0);  
  dat_can3=EEPROM_Read(can_3adrs);  
 }  
 if(dat_can2<=0){      // check if it runs for the first time , then set data null or 0  
  EEPROM_Write(can_2adrs,0);  
  dat_can2=EEPROM_Read(can_2adrs);  
 }  
 if(dat_can1<=0){       // check if it runs for the first time , then set data null or 0  
  EEPROM_Write(can_1adrs,0);  
  dat_can1=EEPROM_Read(can_1adrs);  
 }  
 while(1){  
 c1i=thirdchar(dat_can1);   // It is taking the last update data for Candidate 1  
 c1j=secondchar(dat_can1);  
 c1k=firstchar(dat_can1);  
 c2i=thirdchar(dat_can2);    // It is taking the last update data for Candidate 2  
 c2j=secondchar(dat_can2);  
 c2k=firstchar(dat_can2);  
 c3i=thirdchar(dat_can3);        // It is taking the last update data for Candidate 3  
 c3j=secondchar(dat_can3);  
 c3k=firstchar(dat_can3);  
   Lcd_Out(1,1,"C_1 C_2 C_3");  
     Lcd_Chr(2,1,'*');  
     Lcd_Chr(2,2,'*');  
     Lcd_Chr(2,3,'*');  
     Lcd_Chr(2,6,'*');  
     Lcd_Chr(2,7,'*');  
     Lcd_Chr(2,8,'*');  
     Lcd_Chr(2,11,'*');  
     Lcd_Chr(2,12,'*');  
     Lcd_Chr(2,13,'*');  
  if(PORTA.F4==0){  // if control button is pressed , it enables voting.  
  con=3;  
 }  
 if(con!=3){    // if control button is not pressed ,naturally it disables voting.  
 Lcd_Out(2,15,"DV");  
 PORTC.F0=0;  
 PORTC.F1=1;     //LED2 is on  
 }  
 while(con==3){    // if control button is pressed , it enables voting.  
  Lcd_Out(2,15,"EV");  
 PORTC.F0=1;     //LED1 is on  
 PORTC.F1=0;  
 if(PORTC.F2==0){   // when view status button is pressed  
     Lcd_Chr(2,1,c1i);  
     Lcd_Chr(2,2,c1j);  
     Lcd_Chr(2,3,c1k);  
     Lcd_Chr(2,6,c2i);  
     Lcd_Chr(2,7,c2j);  
     Lcd_Chr(2,8,c2k);  
     Lcd_Chr(2,11,c3i);  
     Lcd_Chr(2,12,c3j);  
     Lcd_Chr(2,13,c3k);  
   delay_ms(4000);  
   con=5;    // con=5 makes disable voting  
  }  
    if(PORTA.F0==0){  
     dat_can1=dat_can1+1;   // Candidate 1 variable is incrementing .  
    EEPROM_Write(can_1adrs,dat_can1); // writing the incremented value on EEPROM for Candidate 1  
     con=5;    // con=5 makes disable voting  
    }  
    if(PORTA.F1==0){  
     dat_can2=dat_can2+1;      // Candidate 2 variable is incrementing .  
    EEPROM_Write(can_2adrs,dat_can2);   // writing the incremented value on EEPROM for Candidate 2  
     con=5;                  // con=5 makes disable voting  
    }  
    if(PORTA.F2==0){  
     dat_can3=dat_can3+1;          // Candidate 3 variable is incrementing .  
    EEPROM_Write(can_3adrs,dat_can3);     // writing the incremented value on EEPROM for Candidate 3  
     con=5;                   // con=5 makes disable voting  
    }  
   if(PORTA.F3==0){      // If Result Button is pressed .  
    Lcd_Cmd(_LCD_CLEAR);  
    for(j=1;j<17;j++){  
   Lcd_Out(1,1," Calculating...");  
   Lcd_Out(2,j,".");  
   delay_ms(200);  
     }  
    if(dat_can2>dat_can1&&dat_can2>dat_can3){  
     Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1,1,"Winner is C_2");  
   Lcd_Out(2,1,"Congratulation!!");  
     delay_ms(5000);  
   Lcd_Out(1,1,"Winner is C_2");  
   Lcd_Out(2,1,"He got =");  
     delay_ms(5000);  
     Lcd_Cmd(_LCD_CLEAR);  
          dat_can2=0;  
  //Erasing All Datas  
    dat_can1=0;  
    dat_can3=0;  
    EEPROM_Write(can_1adrs,0);  
    EEPROM_Write(can_2adrs,0);  
    EEPROM_Write(can_3adrs,0);  
    }  
   else if(dat_can1>dat_can2&&dat_can1>dat_can3){  
     Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1,1,"Winner is C_1");  
   Lcd_Out(2,1,"Congratulation!!");  
     delay_ms(5000);  
     Lcd_Cmd(_LCD_CLEAR);  
          dat_can2=0;  
    dat_can1=0;  
    dat_can3=0;  
    EEPROM_Write(can_1adrs,0);  
    EEPROM_Write(can_2adrs,0);  
    EEPROM_Write(can_3adrs,0);  
    }  
    else if(dat_can3>dat_can1&&dat_can3>dat_can2){  
     Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1,1,"Winner is C_3");  
   Lcd_Out(2,1,"Congratulation!!");  
     delay_ms(5000);  
     Lcd_Cmd(_LCD_CLEAR);  
      dat_can2=0;  
    dat_can1=0;  
    dat_can3=0;  
    EEPROM_Write(can_1adrs,0);  
    EEPROM_Write(can_2adrs,0);  
    EEPROM_Write(can_3adrs,0);  
    }  
    else{  
     Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1,1,"Something is");  
   Lcd_Out(2,1,"Worng!!!");  
     delay_ms(1000);  
     Lcd_Cmd(_LCD_CLEAR);  
    }  
     con=5;  
    }  
  }  
  }  
  }

nt chkk = 33,aq=0,b=0,aa=0,bb=0,cc=0;  
  char thirdchar(short dk){         ////find third Char of Short Data  
   aq=dk/100;  
   aa=aq*100;  
   aa=dk-aa;  
   if(aq==0)  
   { aa=dk;  
    return '0'; }  
   if(aq==1) return '1';  
   if(aq==2) return '2';  
   if(aq==3) return '3';  
   if(aq==4) return '4';  
   if(aq==5) return '5';  
   if(aq==6) return '6';  
   if(aq==7) return '7';  
   if(aq==8) return '8';  
   if(aq==9) return '9';  
  }  
    char secondchar(short dk){  ////find Second Char of Short Data  
   b=aa/10;  
   bb=b*10;  
   bb=aa-bb;  
   if(b==0)  
   { bb=dk;  
    return '0'; }  
   if(b==1) return '1';  
   if(b==2) return '2';  
   if(b==3) return '3';  
   if(b==4) return '4';  
   if(b==5) return '5';  
   if(b==6) return '6';  
   if(b==7) return '7';  
   if(b==8) return '8';  
   if(b==9) return '9';  
  }  
  char firstchar(short dk){ ////find first Char of Short Data  
   if(bb==0) return '0';  
   if(bb==1) return '1';  
   if(bb==2) return '2';  
   if(bb==3) return '3';  
   if(bb==4) return '4';  
   if(bb==5) return '5';  
   if(bb==6) return '6';  
   if(bb==7) return '7';  
   if(bb==8) return '8';  
   if(bb==9) return '9';  
  }  
 void main() {  
  ADCON1=0x0F;  
  CMCON=7;  
  TRISA.F0=1;  
  TRISA.F1=1;  
  TRISA.F2=1;  
  TRISA.F3=1;  
  TRISA.F4=1;  
  TRISC.F0=0;  
  TRISC.F1=0;  
  TRISC.F2=1;  
  Lcd_Init();  
   Lcd_Cmd(_LCD_CLEAR);        // Clear display  
  Lcd_Cmd(_LCD_CURSOR_OFF);  
  /////////////////////// Lcd Scroling Display Start  
   for(i=0;i<19;i++){  
   Lcd_Out(1,1,txt1);  
   Lcd_Out(2,1,txt2);  
   Lcd_Cmd(_LCD_SHIFT_LEFT);  
   delay_ms(200);  
     }  
    Lcd_Cmd(_LCD_CLEAR);  
  /////////////////////// Lcd Scroling Display End  
     for(j=0;j<16;j++){  
     Lcd_Cmd(_LCD_CLEAR);  
     txt[j]='.';  
   Lcd_Out(1,1," Starting...");  
   Lcd_Out(2,1,txt);  
      delay_ms(300);  
     }  
 dat_can1 = EEPROM_Read(can_1adrs); // reading previous data if avail able for Candidate 1  
 c1i=thirdchar(dat_can1); ///third  
 c1j=secondchar(dat_can1); //second  
 c1k=firstchar(dat_can1);   //first  
 //// these functions should be called with this structure  
 /// I used this , because MikroC's short to str conversion didn't work .  
 dat_can2=EEPROM_Read(can_2adrs); // reading previous data if avail able for Candidate 2  
 c2i=thirdchar(dat_can2);  
 c2j=secondchar(dat_can1);  
 c2k=firstchar(dat_can1);  
 dat_can3=EEPROM_Read(can_3adrs);   // reading previous data if avail able for Candidate 2  
 c3i=thirdchar(dat_can3);  
 c3j=secondchar(dat_can1);  
 c3k=firstchar(dat_can1);  
 Lcd_Cmd(_LCD_CLEAR);  
 if(dat_can3<=0){    // check if it runs for the first time , then set data null or 0  
  EEPROM_Write(can_3adrs,0);  
  dat_can3=EEPROM_Read(can_3adrs);  
 }  
 if(dat_can2<=0){      // check if it runs for the first time , then set data null or 0  
  EEPROM_Write(can_2adrs,0);  
  dat_can2=EEPROM_Read(can_2adrs);  
 }  
 if(dat_can1<=0){       // check if it runs for the first time , then set data null or 0  
  EEPROM_Write(can_1adrs,0);  
  dat_can1=EEPROM_Read(can_1adrs);  
 }  
 while(1){  
 c1i=thirdchar(dat_can1);   // It is taking the last update data for Candidate 1  
 c1j=secondchar(dat_can1);  
 c1k=firstchar(dat_can1);  
 c2i=thirdchar(dat_can2);    // It is taking the last update data for Candidate 2  
 c2j=secondchar(dat_can2);  
 c2k=firstchar(dat_can2);  
 c3i=thirdchar(dat_can3);        // It is taking the last update data for Candidate 3  
 c3j=secondchar(dat_can3);  
 c3k=firstchar(dat_can3);  
   Lcd_Out(1,1,"C_1 C_2 C_3");  
     Lcd_Chr(2,1,'*');  
     Lcd_Chr(2,2,'*');  
     Lcd_Chr(2,3,'*');  
     Lcd_Chr(2,6,'*');  
     Lcd_Chr(2,7,'*');  
     Lcd_Chr(2,8,'*');  
     Lcd_Chr(2,11,'*');  
     Lcd_Chr(2,12,'*');  
     Lcd_Chr(2,13,'*');  
  if(PORTA.F4==0){  // if control button is pressed , it enables voting.  
  con=3;  
 }  
 if(con!=3){    // if control button is not pressed ,naturally it disables voting.  
 Lcd_Out(2,15,"DV");  
 PORTC.F0=0;  
 PORTC.F1=1;     //LED2 is on  
 }  
 while(con==3){    // if control button is pressed , it enables voting.  
  Lcd_Out(2,15,"EV");  
 PORTC.F0=1;     //LED1 is on  
 PORTC.F1=0;  
 if(PORTC.F2==0){   // when view status button is pressed  
     Lcd_Chr(2,1,c1i);  
     Lcd_Chr(2,2,c1j);  
     Lcd_Chr(2,3,c1k);  
     Lcd_Chr(2,6,c2i);  
     Lcd_Chr(2,7,c2j);  
     Lcd_Chr(2,8,c2k);  
     Lcd_Chr(2,11,c3i);  
     Lcd_Chr(2,12,c3j);  
     Lcd_Chr(2,13,c3k);  
   delay_ms(4000);  
   con=5;    // con=5 makes disable voting  
  }  
    if(PORTA.F0==0){  
     dat_can1=dat_can1+1;   // Candidate 1 variable is incrementing .  
    EEPROM_Write(can_1adrs,dat_can1); // writing the incremented value on EEPROM for Candidate 1  
     con=5;    // con=5 makes disable voting  
    }  
    if(PORTA.F1==0){  
     dat_can2=dat_can2+1;      // Candidate 2 variable is incrementing .  
    EEPROM_Write(can_2adrs,dat_can2);   // writing the incremented value on EEPROM for Candidate 2  
     con=5;                  // con=5 makes disable voting  
    }  
    if(PORTA.F2==0){  
     dat_can3=dat_can3+1;          // Candidate 3 variable is incrementing .  
    EEPROM_Write(can_3adrs,dat_can3);     // writing the incremented value on EEPROM for Candidate 3  
     con=5;                   // con=5 makes disable voting  
    }  
   if(PORTA.F3==0){      // If Result Button is pressed .  
    Lcd_Cmd(_LCD_CLEAR);  
    for(j=1;j<17;j++){  
   Lcd_Out(1,1," Calculating...");  
   Lcd_Out(2,j,".");  
   delay_ms(200);  
     }  
    if(dat_can2>dat_can1&&dat_can2>dat_can3){  
     Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1,1,"Winner is C_2");  
   Lcd_Out(2,1,"Congratulation!!");  
     delay_ms(5000);  
   Lcd_Out(1,1,"Winner is C_2");  
   Lcd_Out(2,1,"He got =");  
     delay_ms(5000);  
     Lcd_Cmd(_LCD_CLEAR);  
          dat_can2=0;  
  //Erasing All Datas  
    dat_can1=0;  
    dat_can3=0;  
    EEPROM_Write(can_1adrs,0);  
    EEPROM_Write(can_2adrs,0);  
    EEPROM_Write(can_3adrs,0);  
    }  
   else if(dat_can1>dat_can2&&dat_can1>dat_can3){  
     Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1,1,"Winner is C_1");  
   Lcd_Out(2,1,"Congratulation!!");  
     delay_ms(5000);  
     Lcd_Cmd(_LCD_CLEAR);  
          dat_can2=0;  
    dat_can1=0;  
    dat_can3=0;  
    EEPROM_Write(can_1adrs,0);  
    EEPROM_Write(can_2adrs,0);  
    EEPROM_Write(can_3adrs,0);  
    }  
    else if(dat_can3>dat_can1&&dat_can3>dat_can2){  
     Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1,1,"Winner is C_3");  
   Lcd_Out(2,1,"Congratulation!!");  
     delay_ms(5000);  
     Lcd_Cmd(_LCD_CLEAR);  
      dat_can2=0;  
    dat_can1=0;  
    dat_can3=0;  
    EEPROM_Write(can_1adrs,0);  
    EEPROM_Write(can_2adrs,0);  
    EEPROM_Write(can_3adrs,0);  
    }  
    else{  
     Lcd_Cmd(_LCD_CLEAR);  
   Lcd_Out(1,1,"Something is");  
   Lcd_Out(2,1,"Worng!!!");  
     delay_ms(1000);  
     Lcd_Cmd(_LCD_CLEAR);  
    }  
     con=5;  
    }  
  }  
  }  
  }  

Video of Digital Voting Machine in Practical :