program to convert hexadecimal data to decimal format in 8051

// program to convert hexadecimal data to decimal format

#include<reg51.h>

#include"lcd.h"

sbit cs=P3^4;

sbit rd=P3^5;

sbit wr=P3^6;

sbit intr=P3^7;

sfr mydata=0x90;

unsigned char k0,k1,k2,k3,k4;

void conv_and_disp(unsigned char);

void conv_and_disp(unsigned char x)

{

 init_lcd();

 k0=x/10;

 k1=x%10;

 k2=k0%10;

 k3=k0/10;

 disp_lcd(k3+0x30);

 disp_lcd(k2+0x30);

 disp_lcd(k1+0x30);

 while(1);

}

void main()

{

unsigned char val;

//val=0xff;

mydata=0xff;

//cs=1;

rd=1;

wr=1;

intr=1;

while(1)

{

//cs=0;

wr=0;

wr=1;

while(intr==1);

rd=0;

val=mydata;

conv_and_disp(val);

rd=1;

}

}

***************lcd.h*********************

#include"delay.h"

sfr dat=0x0a0;

sbit rs=P3^0;

sbit rw=P3^1;

sbit en=P3^2;

void write_lcd(char);

void init_lcd();

void cmd_lcd(char );

void disp_lcd(char );

void str_lcd(char *);

void write_lcd(char cmd)

{

 dat=cmd;

 rw=0;

 en=1;

 delay_ms(2);

 en=0;

 delay_ms(2);

}

void init_lcd()

{

cmd_lcd(0x01);

cmd_lcd(0x38);

cmd_lcd(0x0c);

cmd_lcd(0x80);

cmd_lcd(0x06);

}

void cmd_lcd(char ch)

{

rs=0;

write_lcd(ch);

}

void disp_lcd(char cmd)

{

rs=1;

write_lcd(cmd);

}

void str_lcd(char *str)

{

while(*str)

disp_lcd(*str++);

}