8051 password c program _ embed4u

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8051 password C Program

November 27th, 2009 admin Leave a comment Go to comments

#include<reg51.h>

#include<string.h>

void get_column();

void get_columnp();

void delay1();

void displayp();

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void disp();

sbit rs=P0^0;

sbit rw=P0^1;

sbit entrans=P3^7;

sbit st=P0^7;

sbit enlcd=P3^4;

sbit enlat=P2^7;

sbit lock1=P2^0;

sbit b=P2^6;

int key1[4][3]={1,2,3,4,5,6,7,8,9,’*',0,’#'};

int chk,r,c,l,pa,word,pass,den1;

int dela;

void calldelay();

void timeopen();

void init_timer0();

void read()

{

P1=0×96;

while(P1==0×96){}

{

if(P1==0×92)r=0;

if(P1==0×94)r=1;

if(P1==0×86)r=2;

if(P1==0×16)r=3;

get_column();

}

}

void get_column()


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{

P1=0×68;

while(P1==0×68){}

if(P1==0×48)c=0;

if(P1==0×28)c=1;

if(P1==0×60)c=2;

disp();

delay1();

}

void readp()

{

P1=0×96;

while(P1==0×96){}

{

if(P1==0×92)r=0;

if(P1==0×94)r=1;

if(P1==0×86)r=2;

if(P1==0×16)r=3;

get_columnp();

}

}

void get_columnp()

{

P1=0×68;

while(P1==0×68){}

if(P1==0×48)c=0;

if(P1==0×28)c=1;

if(P1==0×60)c=2;


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displayp();

delay1();

}

void delay()

{

int j;

for(j=0;j<1000;j++)

{

}

}

void delay1()

{

int i,j;

for(i=0;i<=260;i++)

for(j=0;j<=500;j++)

{}

}

void enter()

{

if(r==3&&c==2)

{

l=0;

}

}

void commandmode()

{

rs=0;

rw=0;


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}

void datamode()

{

rs=1;

rw=0;

}

void enablelatch()

{

int k=1000;

enlat=1;

while(k–)

{}

enlat=0;

}

void enablelcd()

{

int h=1000;

enlcd=1;

while(h–)

{}

enlcd=0;

}

void enabletrans()

{

entrans=1;

}

void init_lcd()

{


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int j;

char a[4]={0×38,0×01,0×0e,0×80};

for(j=0;j<=3;j++)

{

commandmode();

enablelatch();

P0=a[j];

enabletrans();

enablelcd();

}

}

void secondline()

{

commandmode();

enablelatch();

P0=0xc0;

enabletrans();

enablelcd();

}

void display()

{

datamode();

enablelatch();

P0=(key1[r]+48);

enabletrans();

}

void displayp()

{


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datamode();

enablelatch();

P0=(key1[3][0]);

enabletrans();

enablelcd();

}

void displaystr(char *s)

{

int l=strlen(s);

int i;

for(i=0;i<=l-1;i++)

{

datamode();

enablelatch();

P0=s[i];

enabletrans();

enablelcd();

}

}

void displayint(int x)

{

datamode();

enablelatch();

P0=(x+48);

enabletrans();

enablelcd();

}

void disp()


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{

display();

}

void init_timer0()

{

dela=3000;

TR0=0;

TMOD=0×01;

IE=0×82;

TH0=0xdc;

TL0=0×00;

TR0=1;

}

void runtimer0()interrupt 1

{

TR0=0;

dela–;

if(dela==3){P1=0×16;}

if(dela==1){P1=0×60;}

if(dela==0){l=0;}

TF0=0;

TH0=0xdc;

TL0=0×00;

TR0=1;

}

void timeopen()

{

l=1;


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init_timer0();

while(1)

{

read();

enter();

}

TR0=0;

l=1;

}

/*void calldelay()

{

int k=0;

for(k=0;k<30;k++)

{

read();

enter();

if(l==0)k=31;

dela=60000;

while(l–){}

}

chk=0;*/

void main()

{

l=1;

lock1=1;

b=1;

den1=0;

init_lcd();


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displaystr(”code lock”);

secondline();

displaystr(”security”);

while(1)

{

read();

if(r!=3||c!=2)

{

init_lcd();

displaystr(”press#”);

}

enter();

}

l=1;

while(1)

{

init_lcd();

displaystr(”enter code”);

secondline();

while(1)

{

read();

if(pa==0){word=100*key1[r];}

if(pa==1){word=word+key1[r]*10;}

if(pa==2){word=word+key1[r];}

pa++;

enter();

}


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l=1;

pa=0;

if(word==123){

if(den1<2)

{

init_lcd();

displaystr(”enter the pass”);

secondline();

while(1)

{

read();

if(pa==0){pass=100*key1[r];}

if(pa==1){pass=pass+key1[r]*10;}

if(pa==2){pass=pass+key1[r];}

pa++;

enter();

}

l=1;

pa=0;

init_lcd();

if(pass==111)

{

displaystr(”locker opened”);

lock1=0;

timeopen();

lock1=1;

}

if(pass!=111)


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{

displaystr(”denied”);

den1++;

while(1){read();enter();}

l=1;

}

}

if(den1>=2)

{

init_lcd();

displaystr(”contact admin”);

b=0;

while(1)

{

read();enter();}

b=1;

l=1;

}

}}

}

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