Embed4u

#include<reg51.h>

#include<stdio.h>

#include<string.h>

sbit BUZZER=P2^0;

char a[4][3]={’1′,’2′,’3′,’4′,’5′,’6′,’7′,’8′,’9′,’*',’0′,’#'};

char b[4][3]={’*',’*',’*',’*',’*',’*',’*',’*',’*',’*',’*',’*'};

char pass9[] = {’1′,’2′,’3′,’4′,’\0′};

char r=0,e=0,l;

char msg[]=”ENTERPASS:”,password[6];

char i,j,k,c=0;

int z=0,s,f=0;

xdata char *ptr_cmd = (xdata char *)0×0FFF8;         //LCD command mode control

xdata char *ptr_en = (xdata char *)0×0FFF9;          //LCD Enable

char mybyte;

void busy_check();

void out();

void pass_word();

void baud_init();

void release_key();

void key_press();

void debounce();

void column();

void init_lcd1();

void display1(char *name);

void clear_lcddisplay();

void card_match();

void second_line();

void card_mismatch();

void serial_buzz_command();

void baud_init()

{

TMOD = 0×20;

TH1 = 0xFD;

SCON = 0×50;

TR1 = 1;

}

void delay1()

{

int y = 100;

while(y–);

}

void serial_tx()

{

SBUF = 0×42;

while(TI == 0);

TI = 0;

delay1();

SBUF = 0×01;

while(TI == 0);

TI = 0;

delay1();

SBUF = 0×59;

while(TI == 0);

TI = 0;

delay1();

}

char serial_rx()

{

int x;

while(RI == 0);

{

x++;

if(x==1000)

serial_tx();

}

mybyte = SBUF;

RI = 0;

return (mybyte);

}

void busy_check()

{

*ptr_cmd = 0×02;

while((*ptr_en & 0×80) != 0×00){}

}

void delaysec()

{

unsigned long int i=10000;

while(i–);

}

void lcd_comm()

{

*(ptr_cmd)   = 0×00;

}

void init_lcd()

{

lcd_comm();

*(ptr_en)       = 0×38;

busy_check();

lcd_comm();

*(ptr_en)       = 0×0E;

busy_check();

lcd_comm();

*(ptr_en)       = 0×80;

busy_check();

lcd_comm();

*(ptr_en) = 0×01;

busy_check();

}

void second_line()

{

lcd_comm();

*(ptr_en)       = 0xc0;

busy_check();

}

void display(char *name)

{

int l = strlen(name);

int i;

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

{

*(ptr_cmd) = 0×01;

*(ptr_en) = name[i];

busy_check();

}

}

void delay2()

{

unsigned int i = 10000;

while ( i– );

}

void delay()

{

unsigned int i = 50000;

while ( i– );

}

void display2()

{

*(ptr_cmd) = 0×01;

*(ptr_en)  = b[r];

busy_check();

}

void column()

{

if    ((P3 & 0×30) == 0×30)

{

c=0;

display2();

password[z] = a[r];

z++;

delay();

}

else if((P3 & 0×28) == 0×28)

{

c=1;

display2();

password[z] = a[r];

z++;

delay();

}

else if((P3 & 0×18) == 0×18)

{

c=2;

display2();

password[z] = a[r];

z++;

delay();

}

}

void clear_lcddisplay()

{

lcd_comm();

*( ptr_en )     = 0×01;

busy_check();

lcd_comm();

*( ptr_en )     = 0×01;

busy_check();

}

void init_lcd1()

{

lcd_comm();

*( ptr_en )     = 0×38;

busy_check();

lcd_comm();

*(ptr_en)       = 0×0e;

busy_check();

lcd_comm();

*(ptr_en)       = 0×80;

busy_check();

lcd_comm();

*(ptr_en) = 0×01;

busy_check();

for(i=0;i<10;i++)

{

*(ptr_cmd) = 0×01;

*(ptr_en) = msg[i];

busy_check();

}

}

void debounce()

{

P1 = 0xfe;   //ground row 0 only

while((P3 & 0×38) != 0×38)

{

r=0;

column();

}

P1 = 0xfd; //ground row 1 only

while((P3 & 0×38) != 0×38)

{

r=1;

column();

}

P1 = 0xfb; //ground row 2 only

while((P3 & 0×38) != 0×38)

{

r=2;

column();

}

P1 = 0xf7;  //ground row 3 only

while((P3 & 0×38) != 0×38)

{

r=3;

column();

}

}

void release_key()

{

P1 = 0xf0;

while((P3 & 0×38) == 0×38)

{delay2();}

P3 = 0×0ff;

debounce();

delay ();

}

void first_line()

{

lcd_comm();

*(ptr_en)       = 0×80;

busy_check();

}

void buzzer()

{

char del=0;

BUZZER=1;

for(del=0;del<=10;del++)

{

delay();

}

P2=0×00;

}

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

//MAIN PROGRAM STARTS HERE//

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

void main()

{

P2=0×00;

while(1)

{

char i=0;

char serial_no[21];

char temp1[]={’1′,’D',’0′,’0′,’E',’4′,’F',’7′,’\0′};

baud_init();

init_lcd();

display(”DIP CARD NEAR ME”);

serial_tx();

while(i<=8)

{

baud_init();

serial_no[i]=serial_rx();

i++;

}

if(*serial_no==*temp1)

{

card_match();

}

else

{

card_mismatch();

}

//         while(1);

}

}

void card_match()

{

char f,o=4;

second_line();

display(”CARD ACCEPT”);

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

{

delay();

}

f=0;

init_lcd1();

while(o–)

{

release_key();

}

password[z] = ‘\0′;

f = strcmp(pass9,password);

if (f == 0 )

{

second_line();

display(”PASSWORD VALID”);

delay();

delay();

second_line();

display(”NAME:XY EMP NO:5″);

delay();

delay();

delay();

clear_lcddisplay();

}

else if ((f >= 1 ) || (f <= -1))

{

second_line();

display(”PASSWORD INVALID”);

clear_lcddisplay();

delay();

delay();

second_line();

display(”NOT AN EMPLOYEE”);

buzzer();

delay();

delay();

delay();

clear_lcddisplay();

}

}

void card_mismatch()

{

second_line();

display(”RONG CARD CALLSE”);

buzzer();

delay();

delay();

clear_lcddisplay();

}