LED PATTERN

*///////////////////////////////////////////////////////////////////
//Author : Palak Patel
//Contact No : 9173211683
//Title : Led Pattern(5 Patterns using Switch)
//Platform : 8051
//Software : Keil 4.0
//Created: 15-05-2014
////////////////////////////////////////////////////////////////////*


Program:

#include<reg51.h>
#define led P1

sbit sw=P2^0;
sbit sw1=P2^1;
sbit sw2=P2^2;
sbit sw3=P2^3;
sbit sw4=P2^4;

void delay();

void main()
{
        unsigned char k,k1,k2,i,j,g;
        P:while(1)
        {
if(sw==0  &&  sw1==1  && sw2==1  && sw3==1 && sw4==1)
{
while(1)
{
led=0x00;
delay();
led=0xff;
delay();
if(sw1==0 || sw2==0 || sw3==0 || sw4==0)
goto P;
}
}

else if(sw1==0 && sw==1 && sw2==1 && sw3==1 && sw4==1 )
{
while(1)
{
led=0x55;
delay();
led=0xaa;
delay();
if(sw==0 || sw2==0 || sw3==0 || sw4==0)
goto P;
}
            }

else if(sw2==0 && sw==1 && sw1==1 && sw3==1 && sw4==1)
{
while(1)
{
led=0x01;
delay();
for(g=8 ; g>=1 ; g--)
{
led=led<<1;
delay();
}
if(sw1==0 || sw1==0 || sw3==0 || sw4==0)
goto P;
}
}

else if(sw3==0 && sw==1 && sw1==1 && sw2==1 && sw4==1)
{
while(1)
{
led=0x80;
delay();
for(g=8 ; g>=1 ; g--)
{
P1=P1>>1;
delay();
}
if(sw==0 || sw1==0 || sw2==0 || sw4==0)
goto P;
}
}

else if(sw4==0 && sw==1 && sw1==1 && sw2==1 && sw3==1)
{
while(1)
{
k2=0;
for(j=4 ; j>=1 ; j--)
{
k=0x01;
k1=0x80;
for(i=1 ; i<=j ; i++)
{
led=k | k1 | k2;
delay();
k=k<<1;
k1=k1>>1;
}
k2=led;
}
if(sw==0 || sw1==0 || sw2==0 || sw3==0)
goto P;
}
}

else
{
led=0x00;
}
        }
}

void delay()
{
              unsigned int i;
              for(i=0 ; i<20000 ; i++);
}

Simulation:

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