typeb.c

另外一个RC531非接触式读卡器的全部源代码

#include <stdio.h>
#include <sys/ioctl.h>
#include "rc531.h"

/* TYPE B function */
int reqb(int type, char *atqb)
{
 int i;
 char sbuf[128];
 struct rc531_cmd cmd;

 cmd.sendbuf = sbuf;
 cmd.recvbuf = atqb;
 cmd.cmd = 0x1e;    //transceive command
 cmd.bytesent = 3;
 cmd.timeout = 0x1a;

 for(i=0; i<5; i++){
     sbuf[0] = 0x05;    //request command
     sbuf[1] = 0x00;
     sbuf[2] = type|i;

     ioctl(fd531, RC531_CMD, &cmd);

     if(cmd.status&0x80){
         continue;
     }
     if(cmd.status&0x0c){
         return cmd.status;
     }
     if(cmd.byterecv!=12){
         return E_BYTE;
     }

     return E_OK;
 }

 return E_TIMEOUT;
}

int attrib(int uid, int cid, char *ata)
{
 int i;
 char *pid;
 char sbuf[128];
 struct rc531_cmd cmd;

 pid = (char *)&uid;
 cmd.cmd = 0x1e;
 cmd.sendbuf = sbuf;
 cmd.recvbuf = ata;
 cmd.bytesent = 9;
 cmd.timeout = 0x1a;

 sbuf[0] = 0x1d;
 for(i=0; i<4; i++){
      sbuf[i+1] = pid[i];
 }
 sbuf[5] = 0x00;
 sbuf[6] = 0x05;
 sbuf[7] = 0x01;
 sbuf[8] = cid;

 ioctl(fd531, RC531_CMD, &cmd);

 if(cmd.status){
     return cmd.status;
 }
 if(!cmd.byterecv){
     return E_BYTE;
 }

 return E_OK;
}

int haltb(int uid)
{
 int i;
 char *pid;
 char sbuf[8], rbuf[8];
 struct rc531_cmd cmd;

 pid = (char *)&uid;
 cmd.cmd = 0x1e;
 cmd.sendbuf = sbuf;
 cmd.recvbuf = rbuf;
 cmd.bytesent = 5;
 cmd.timeout = 0x1a;

 sbuf[0] = 0x50;
 for(i=0; i<4; i++){
      sbuf[i+1] = pid[i];
 }

 ioctl(fd531, RC531_CMD, &cmd);

 return E_OK;
}