sir why the display is not working befoer rfmodule read rfid,if the functions(lcd(),lcdcmd(),display())are removed from after while() or befoer while.
#include<reg51.h>
#include<stdio.h>
#include<string.h>
sbit rs=P2^0;
sbit rw=P2^1;
sbit en=P2^2;
unsigned char tem[9];
void serialrx();
void cmp();
void lcdcmd(unsigned char l);
void lcddata(unsigned char l);
void display(unsigned char *dr);
//void delay(unsigned char s);
void delay(unsigned char l);
void lcd();
void lcdcmd(unsigned char l)
{
P1=l;
rs=0;
en=1;
rw=0;
en=0;
}
void lcddata(unsigned char l)
{
P1=l;
rs=1;
en=1;
rw=0;
en=0;
}
void display(unsigned char *dr)
{
while(*dr)
{
lcddata(*dr++);
}
}
/*void delay(unsigned char l)
{
int i ;
for(i = 0 ; i<l ; i++)
{
TH0 = 0xFC ;
TL0 = 0x18 ;
TR0 = 1 ; //start the timer
while(!TF0); //wait here till overflow occurs
TR0 = 0 ; //reset TR0
TF0 = 0 ; //reset TF0
}
} */
void delay(unsigned char l)
{
while(l--);
}
void lcd()
{
lcdcmd(0x0c);
delay(6);
lcdcmd(0x38);
delay(6);
lcdcmd(0x06);
delay(6);
}
void main()
{
lcd();
lcdcmd(0x80);
delay(1000);
display("WARRIOR TRANS");
delay(1000);
lcdcmd(0xc0);
delay(1000);
display("MISSION TOOL");
while(1)
{
lcd();
lcdcmd(0x80);
delay(1000);
display("WARRIOR TRANS");
delay(1000);
lcdcmd(0xc0);
delay(1000);
display("MISSION TOOL");
serialrx();
cmp();
}
}
void cmp()
{
int a;
char b[9]="16722482";
a=strcmp(b,tem);
if(a==0)
{
lcd();
lcdcmd(0x80);
display(" ");
delay(1000);
lcdcmd(0x80);
display("AUTHORISED");
delay(1000);
lcdcmd(0xc0);
display(" ");
delay(1000);
lcdcmd(0xc0);
display(" TOOL ");
}
else
{
lcd();
lcdcmd(0x80);
display(" ");
delay(1000);
lcdcmd(0x80);
display("UNAUTHORISED");
delay(1000);
lcdcmd(0xc0);
display(" ");
delay(1000);
lcdcmd(0xc0);
display(" TOOL ");
}
}
void serialrx()
{
int i;
TMOD=0x20;
TH1=0xfd;
SCON=0x50;
TR1=1;
for(i=0;i<8;i++)
{
while(RI==0);
tem[i]=SBUF;
RI=0;
}
tem[i]='\0';
}