rfid c code on 89c51 problem plz help.

[aqibpervaiz]

hi i m making rfid base security system in which when u bring card near relay which operate and lock will be open.problem is it does not goes on the true statement it always goes on else statement what ever card i put near to it. i m share u my code plz help me.thanks in advance.


#include<reg51.h>
#include<string.h>
sbit relay=P2^0;
sbit led=P2^1;
sbit pled=P2^2;
unsigned char k=0;
char temp=1;
void delay(unsigned int itime);
void get_code();
unsigned char check();
unsigned char aqib[13]={'¿','Y','Ù','ö','Ö','‘','‘','›','‘','y','w','y','ù'};
unsigned char reid[13];
void main (){
//aqib[0]="¿"
//aqib[1]="Y"
//aqib[2]="Ù"
//aqib[3]="ö"
//aqib[4]="Ö"
//aqib[5]="‘"
//aqib[6]="‘"
//aqib[7]="›"
//aqib[8]="‘"
//aqib[9]= "y"
//aqib[10]= "w"
//aqib[11]= "y"
//aqib[12]= "ù"
//aqib[0]=10111111;
//aqib[1]=01011001;
//aqib[2]=11011001;
//aqib[3]=11110110;
//aqib[4]=11010110;
//aqib[5]=10010001;
//aqib[6]=10010001;
//aqib[7]=10011011;
//aqib[8]=10010001;
//aqib[9]=01111001;
//aqib[10]=01110111;
//aqib[11]=01111001;
//aqib[12]=11111001;
relay=0;
led =0;
pled=0;
SCON=0x50;
TMOD=0x20;
TH1=-3;
TR1=1;

while (1){

pled=1;

get_code();
//temp = strcmp(aqib,reid);
temp=check;
if (temp==13) {
relay=1;
delay(500);
relay=0;
}
else
{ unsigned char i;
for (i=0;i<10;i++){
led=1;
delay(100);
led=0;
}

}


}
}









void get_code(){

for (k=0;k<13;k++)
{
while(RI==0);
reid[k]=(char)SBUF;
RI=0;}
}
unsigned char check(){
//strcmp(reid,aqib)
unsigned char temp=0,i=0;
for (i=0;i<12;i++){
if ((reid)=(aqib)){
temp=temp+1;
}
}
return temp;
}



void delay(unsigned int itime)
{
unsigned int i,j;
for (i=0;i<itime;i++)
for (j=0;j<111;j++);
}

 

[embRTS]

I think you need to do a little change in the following

void get_code(){

for (k=0;k<12;k++)  // Use '12' instead of '13'
{
//while(RI==0);
reid[k]=(char)SBUF;	
//RI=0;}
}

- - - Updated - - -

I mean to say the parameter for doing the true statement is getting the ID card tagged ??
then do one thing whenever the card is tagged then true action happens
like one example is whenever card is tagged the Rx pin goes "LOW" so that can also be a condition but as you are making on Security basis so you may go with it and then check for Card ID Number,