Question

What is the circuit diagram of password based door lock system project by using interface 8088 microprocessor with peripherals Ics ( PPI , PIT and PIC ) and what is code by using assembly language ?

notes:
1- this question related to microprocessor Interface subject .
2- I need answer after 4 hour very necessary , please

Answer 1

May this helps you...

#include"delay.h"

#include"lcd.h"

#include"keypad.h"

sbit a1=P2^0;

sbit a2=P2^1;

sbit a3=P2^2;

sbit a4=P2^3;

void motor();

unsigned char ar[5];

unsigned char com[5]={"77777"};

unsigned int f,m=1,p;

void main()

{

unsigned int i;

lcd_ini();

while(1)

{

cmd(0x01);

lcd_str(" ENTER YOUR");

cmd(0xc0);

lcd_str(" PASSWORD");

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

{

keypad1();

ar[i]=c;

if(i==0)

{

  cmd(0x01);

lcd_display(' ');

}

lcd_display('*');

}

if(ar[0]==com[0] && ar[1]==com[1] && ar[2]==com[2] && ar[3]==com[3] && ar[4]==com[4])

{

m=1;

}

else

{

m=0;

}

if(m==1)

{

cmd(0x01);

lcd_str(" PASSWORD MATCHED");

cmd(0xc0);

lcd_str(" ACCESS GRANTED");

motor();

p=0;

delay_fv(1000,100);

}

else if(m==0)

{

p++;

cmd(0x01);

lcd_str(" WRONG PASSWORD");

cmd(0xc0);

lcd_str(" ACCESS DENIED");

delay_fv(1000,100);

delay_fv(1000,100);

m=1;

if(p==3)

{

cmd(0x01);

lcd_str(" PLEASE CONTACT");

cmd(0xc0);

lcd_str(" YOUR HOD....");

while(p==3);

}

}

}

}

void motor()

{

unsigned int i;

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

{

a2=a3=a4=0;

a1=1;

delay_ff();

a1=a3=a4=0;

a2=1;

delay_ff();

a1=a2=a4=0;

a3=1;

delay_ff();

a1=a2=a3=0;

a4=1;

delay_ff();

  }

delay_fv(1000,100);

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

{

a2=a3=a1=0;

a4=1;

delay_ff();

a1=a2=a4=0;

a3=1;

delay_ff();

a1=a3=a4=0;

a2=1;

delay_ff();

a4=a2=a3=0;

a1=1;

delay_ff();

}

}

lcd.h

sbit rs=P3^0;

sbit rw=P3^1;

sbit en=P3^2;

sfr lcd=0x90;

void lcd_display(unsigned int x)  // lcd display fuction

{

unsigned int i;

lcd=x;

rs=1;

rw=0;

en=1;

for(i=0;i<100;i++);

en=0;

}

void cmd(unsigned char m)

{

unsigned int i;

lcd=m;

rs=0;

rw=0;

en=1;

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

en=0;

}

void lcd_ini()  

{

cmd(0x38);

cmd(0x0e);

cmd(0x01);

cmd(0x06);

cmd(0x90);

}

void lcd_str(unsigned char *str)  

while(*str!='\0')  

{

  lcd_display(*str);

  str++;

}

}

keypad.h

sbit r1=P0^0;

sbit r2=P0^1;

sbit r3=P0^2;

sbit r4=P0^3;

sbit c1=P0^4;

sbit c2=P0^5;

sbit c3=P0^6;

sbit c4=P0^7;

unsigned int c;

char keypad1()

{

P2=0xff;

while(1)

{

r1=0;

r4=1;

if(c1==0)

{

c='7';

delay_pf(500);

return c;

}

else if(c2==0)

{

c='8';

delay_pf(500);

return c;

}

else if(c3==0)

{

c='9';

delay_pf(500);

return c;

}

else if(c4==0)

{

c='/';

delay_pf(500);

return c;

}

r1=1;

r2=0;

if(c1==0)

{

c='4';

delay_pf(500);

return c;

}

else if(c2==0)

{

c='5';

delay_pf(500);

return c;

}

else if(c3==0)

{

c='6';

delay_pf(500);

return c;

}

else if(c4==0)

{

c='*';

delay_pf(500);

return c;

}

r2=1;

r3=0;

if(c1==0)

{

c='1';

delay_pf(500);

return c;

}

else if(c2==0)

{

c='2';

delay_pf(500);

return c;

}

else if(c3==0)

{

c='3';

delay_pf(500);

return c;

}

else if(c4==0)

{

c='-';

delay_pf(500);

return c;

}

r3=1;

r4=0;

if(c1==0)

{

delay_pf(500);

cmd(0x01);

}

else if(c2==0)

{

c='0';

delay_pf(500);

return c;

}

else if(c3==0)

{

c='=';

delay_pf(500);

return c;

}

else if(c4==0)

{

c='+';

delay_pf(500);

return c;

}

}

}

Delay.h

void delay_ff()  // fully fixed delay

{

    unsigned int i,j;

    for(i=0;i<80;i++)

    for(j=0;j<120;j++);

}

void delay_pf(unsigned int x)

{

unsigned int i,j;

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

for(j=0;j<50;j++);

}

void delay_fv(unsigned int x,y)

{

unsigned int i,j;

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

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

}