sir i have interface 16×2 lcd display with microcontroller at89c51 and it is working fine in proteus as well as keil compiler … but when i m burning hex code and interfacing with my hardware i am not able to get the output …. i m posting my coding over here …. please help me out … thanks in advance

#includeltreg51.hgt
#define dp P0
sbit rs=P0^1;
sbit en=P0^2;
sbit rw=P0^3;
lcdcomm(unsigned char val);
lcddat(unsigned char val);
msdelay(unsigned int val);
write_nibble(unsigned int val);

unsigned char mydat[]=”hello kaushal”;
unsigned char urdat[]=”hello amit”;

main()
{
P0=0xff;
msdelay(10);
lcdint();
lcdcomm(0×01);
msdelay(1);
lcdcomm(0×80);
msdelay(1);
lcddat(‘*’);
msdelay(1);
lcdcomm(0×82);
msdelay(1);
dis_measure();
lcdcomm(0xc2);
msdelay(1);
dis_d_t();
}

unsigned char z;

lcdint()
{
rs=0;
rw=0;
dp=0×28;

en=1;
msdelay(1);
en=0;
msdelay(1);

lcdcomm(0×28);
msdelay(1);

lcdcomm(0x0f);
msdelay(1);
}

dis_measure()
{
unsigned char z;
for(z=0;zlt=15;z++)
{
lcddat(urdat[z]);
msdelay(1);
}

}
dis_d_t()
{
unsigned char z;
for(z=0;zlt=15;z++)
{
lcddat(mydat[z]);
msdelay(1);
}

}

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

lcdcomm(unsigned char val)
{
rs=0;
rw=0;
write_nibble();
}

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

lcddat(unsigned char val)
{
rs=1;
rw=0;
write_nibble();
}

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

msdelay(unsigned int val)
{
unsigned int i,j;
for(i=0;ilt=val;i++)
for(j=0;jlt=200;j++);
}

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

write_nibble(unsigned int val)
{
unsigned char i,j,k;
i=valamp0xf0;
j=dpamp0x0f;
dp=j|i;
en=1;
msdelay(1);
en=0;
msdelay(1);
val=valltlt4;
i=valamp0xf0;
k=dpamp0x0f;
dp=k|i;
en=1;
msdelay(1);
en=0;
msdelay(1);
}