test1.c

Source code for REAL TIME RFID reader in ARM LPC2148.... Core is ARM7TDMI-S

#define CR     0x0D
#include <LPC21xx.H>
//#include<string.h>
#include<stdio.h>



int i,j,l,m;
char k[100],q[100];
unsigned int val,k1,c;
char a[100],b[100];

void init_serial (void)			/* Initialize Serial Interface       */

	{               	   
	    PINSEL0	= 0x20050005;		/* Enable RxD1 and TxD1              */ 
	    PINSEL1 = 0x00000000;
		IODIR0  = 0x00100000; 					//p0.20
		U1LCR 	= 0x00000083;       /* 8 bits, no Parity, 1 Stop bit     */
	  	U0LCR   = 0x00000083;
	  	U1DLL 	= 0x000000C2;       /* 9600 Baud Rate @ 30MHz VPB Clock  */
	  	U0DLL   = 0x000000C2;
	  	U1LCR 	= 0x00000003;       /* DLAB = 0                          */
	 	U0LCR   = 0x00000003;
	}
	


const char ID_no[50][10]={"1300F780FE","1300F7BAF1","1300F7CF92",
						  "1300F7780C","1300F795A0","1300F78AEF",
						  "1300F7AE04","1300F7B37E","1300F7C7BA",
						  "1300F7C59B","1300F7BBDA","1300F78E3F",
						  "1300F7C42A","1300F7DA1C","1300F787E1",
						  "1300F7CD35","1300F7AFEE","1300F77B03",
						  "1300F77E3F","1300F78BBB","1300F789C5",
						  "1300F7C68A","1300F77A8D","1300F7B110",
						  "1300F7A754","1300F7B14C","1300F7CEA7",
						  "1300F79237","1300F7AA5A","1300F79304",
						  "1300F79951","1300F7B04D","1300F7B246",
						  "1300F77DC7","1300F7E110","1300F7AC57",
						  "1300F7A0F1","1300F77B74","1300F7D409",
						  "1300F79098","1300F797CD","1300F78174",
						  "1300F78EE0","1300F7E49E","1300F77BE6",
						  "1300F7AB1D","1300F77852","1300F7C746",
						  "1300F798AD","1300F79CF0"};



 


       int main(void)
		{
        VPBDIV = 0x02;						//Divide Pclk by two
        init_serial();
				
		while(1)

		{

				IOSET0 = 0x00100000;  
	

		       if((U0LSR & 0x01))
		  
			    {
				  
				         for (i=1;i<13;i++)
						 {
 				    	 while(!(U0LSR & 0x01));
				   		 a[i]=U0RBR;
					 
				    	 }
					
					    k[0]=a[1];
					    k[1]=a[2];
					    k[2]=a[3];
					    k[3]=a[4];
					    k[4]=a[5];
					    k[5]=a[6];
					    k[6]=a[7];
					    k[7]=a[8];
					    k[8]=a[9];
					    k[9]=a[10];
	   			        k[10]='o';
				
					                     
			            for(j=0;j<50;j++)
					    {
					    c=0;
					    for(i=0;i<10;i++)
					    {
					    if(ID_no[j][i]!=k[i])
						{
						c++;
						break;
						}
						}
						if(c==0)
						{
						while (!(U1LSR & 0x20));
						i=0;
					    while(k[i]!='\0')
						{
						U1THR=k[i];
						i++;					
						}
						c++;
						IOCLR0 = 0x00100000;
						for(val=0;val<0xefff;val++);
						}
					    }
					        
		       }	


  

         if((U1LSR & 0x01))
	     {
  		 	    for (i=1;i<13;i++)
					 {
	       				 while(!(U1LSR & 0x01));
						 b[i]= U1RBR;
					 }	

					q[0]=b[1];
					q[1]=b[2];
					q[2]=b[3];
					q[3]=b[4];
					q[4]=b[5];
					q[5]=b[6];
					q[6]=b[7];
					q[7]=b[8];
					q[8]=b[9];
					q[9]=b[10];
			        q[10]='i';

				  for(j=0;j<50;j++)
					 {
					  c=0;
					   for(i=0;i<10;i++)
					   {
					      if(ID_no[j][i]!=q[i])
						  {
						    c++;
							break;
						  }
						}
					  if(c==0)
						 {
						   	while (!(U1LSR & 0x20));
							i=0;
					    	while(q[i]!='\0')
							 {
							 U1THR=q[i];
							 i++;					
							 }
							c++;
							IOCLR0 = 0x00100000;
						    for(val=0;val<0xefff;val++);
						   
						  }
					   }
				 
			 }

		   }
           }