#include<reg51.h>
#include<string.h>
#include <intrins.h>
#define cmdport P3
#define dataport P2
sbit rs = P3^0; //register select pin
sbit rw = P3^1; //read write pin
sbit e = P3^2; //enable pin
sbit motor_pin = P0^7;
unsigned int data_out,temp;
unsigned char card_id[12];
code unsigned char RFID_1[]=”FE00458C2413″;
code unsigned char RFID_2[]=”4E007051B8D7″;
void Delay(unsigned int);
void Delay_servo(unsigned int);
void recieve() //Function to recieve data serialy from RS232
{
unsigned char k;
for(k=0;k<12;k++)
{
while(RI==0);
card_id[k]=SBUF;
RI=0;
}
}
void delay(unsigned int msec) //Function to provide time delay in msec.
{
int i,j;
for(i=0;i<msec;i++)
for(j=0;j<1275;j++);
}
//void Delay(unsigned int ms)
//{
// unsigned long int us = ms*1000;
//while(us–)
// {
// _nop_();
//}
//}
void Delay_servo(unsigned int us)
{
while(us–)
{
_nop_();
}
}
void lcdcmd(unsigned char item) //Function to send command to LCD
{
rs= 0;
rw=0;
e=1;
dataport = item;
delay(10);
e=0;
delay(10);
}
void lcddata(unsigned char iitem) //Function to send data to LCD
{
rs= 1;
rw=0;
e=1;
dataport = iitem;
delay(10);
e=0;
delay(10);
}
void lcd_init()
{
lcdcmd(0x38);
lcdcmd(0x0E);
lcdcmd(0x01);
}
//void lcd_string(char add,char *str)
void lcd_string(char *iitem)
{
int i;
//lcdcmd(add);
for(i=0;iitem!=’ ’;i++)
{
lcddata(iitem);
}
}
void motor_forward()
{
motor_pin = 0;
do
{ //Turn to 0 degree
motor_pin = 1;
Delay_servo(30);
motor_pin = 0;
delay(100);
//Turn to 90 degree
motor_pin=1;
Delay_servo(62);
motor_pin=0;
delay(100);
//Turn to 180 degree
motor_pin=1;
Delay_servo(110);
motor_pin=0;
delay(100);
}while(1);
}
void main()
{
//unsigned char rec_data[12];
int l=12,i;
TMOD=0x20; //Enable Timer 1
TH1=0XFD;
SCON=0x50;
TR1=1;
lcd_init();
lcdcmd(0x80);
lcd_string(“SWAP_THE_CARD:”); // Triggering Timer 1
delay(100);
while(1)
{
recieve();
lcdcmd(0xC1); //Place cursor to second position of second line
for(l=0;l<12;l++)
{
lcddata(card_id[l]);
delay(1000);
}
i=0;
while(1)
{
i=strcmp(RFID_1,card_id);
if(i!=0)
{
lcdcmd(0x01);
lcdcmd(0x0E);
lcdcmd(0x80);
//lcddata(“MOVE MOTOR”);
lcd_string(“MOVE MOTOR”);
motor_forward();
}
else
{
lcdcmd(0x01);
lcdcmd(0x0E);
lcdcmd(0x80);
delay(100);
//lcddata(“NO_MOVEMENT”);
lcd_string(“NO MOVEMENT”);
delay(1000);
}
}
}
}
i here posted my code…………..due to the mismatching between RFID tag numbers,there is always showing the NO MOVEMENT of motor………………
i already mentioned the rfid tag number from hyperterminal in the above.