Single Switch Using Lcd AT89C52

#include<reg52.h>
sfr ldata=0x90;
sbit rs=P3^4;
sbit en=P3^2;
sbit rw=P3^3;
sbit sw=P2^0;
void msdelay(unsigned int);
void lcdcmd(unsigned char);
void lcddata(unsigned char);
void main()
{
if(sw==0)
{
lcdcmd(0x38);
msdelay(100);
lcdcmd(0x0E);
msdelay(100);
lcdcmd(0x01);
msdelay(100);
lcdcmd(0x06);
msdelay(100);
lcdcmd(0x80);
msdelay(100);
lcddata('S');
msdelay(100);
lcddata('h');
msdelay(100);
lcddata('i');
msdelay(100);
lcddata('m');
msdelay(100);
}
}
void lcdcmd(unsigned char value)
{
ldata=value;
en=1;
rs=0;
rw=0;
msdelay(5);
en=0;
}
void lcddata(unsigned char value)
{
ldata=value;
en=1;
rs=1;
rw=0;
msdelay(5);
en=0;
}
void msdelay(unsigned int item)
{
unsigned int i,j;
for(i=0;i<=item;i++)
for(j=0;j<1275;j++);
}