pn531_usb.c

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00001 /*-
00002  * Public platform independent Near Field Communication (NFC) library
00003  * 
00004  * Copyright (C) 2009, Roel Verdult
00005  * 
00006  * This program is free software: you can redistribute it and/or modify it
00007  * under the terms of the GNU Lesser General Public License as published by the
00008  * Free Software Foundation, either version 3 of the License, or (at your
00009  * option) any later version.
00010  * 
00011  * This program is distributed in the hope that it will be useful, but WITHOUT
00012  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00013  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
00014  * more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public License
00017  * along with this program.  If not, see <http://www.gnu.org/licenses/>
00018  */
00019 
00025 /*
00026 Thanks to d18c7db and Okko for example code
00027 */
00028 
00029 #ifdef HAVE_CONFIG_H
00030 #  include "config.h"
00031 #endif // HAVE_CONFIG_H
00032 
00033 #include <stdlib.h>
00034 
00035 #include "../drivers.h"
00036 #include <nfc/nfc-messages.h>
00037 
00038 nfc_device_desc_t *
00039 pn531_usb_pick_device (void)
00040 {
00041   nfc_device_desc_t *pndd;
00042 
00043   if ((pndd = malloc (sizeof (*pndd)))) {
00044     size_t  szN;
00045 
00046     if (!pn531_usb_list_devices (pndd, 1, &szN)) {
00047       DBG ("%s", "pn531_usb_list_devices failed");
00048       return NULL;
00049     }
00050 
00051     if (szN == 0) {
00052       DBG ("%s", "No device found");
00053       return NULL;
00054     }
00055   }
00056   return pndd;
00057 }
00058 
00059 bool
00060 pn531_usb_list_devices (nfc_device_desc_t pnddDevices[], size_t szDevices, size_t * pszDeviceFound)
00061 {
00062   // array of {vendor,product} pairs for USB devices
00063   usb_candidate_t candidates[] = { {0x04CC, 0x0531}
00064   , {0x054c, 0x0193}
00065   };
00066 
00067   return pn53x_usb_list_devices (&pnddDevices[0], szDevices, pszDeviceFound, &candidates[0],
00068                                  sizeof (candidates) / sizeof (usb_candidate_t), PN531_USB_DRIVER_NAME);
00069 }
00070 
00071 nfc_device_t *
00072 pn531_usb_connect (const nfc_device_desc_t * pndd)
00073 {
00074   return pn53x_usb_connect (pndd, pndd->acDevice, NC_PN531);
00075 }