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96 lines
2.9 KiB
96 lines
2.9 KiB
11 years ago
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/*
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* libusb example program for hotplug API
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* Copyright (C) 2012-2013 Nathan Hjelm <hjelmn@mac.ccom>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <sched.h>
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#include <unistd.h>
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#include <libusb.h>
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int done = 0;
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libusb_device_handle *handle;
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static int hotplug_callback (libusb_context *ctx, libusb_device *dev, libusb_hotplug_event event, void *user_data) {
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struct libusb_device_descriptor desc;
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int rc;
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rc = libusb_get_device_descriptor(dev, &desc);
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if (LIBUSB_SUCCESS != rc) {
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fprintf (stderr, "Error getting device descriptor\n");
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}
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printf ("Device attach: %04x:%04x\n", desc.idVendor, desc.idProduct);
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libusb_open (dev, &handle);
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done++;
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return 0;
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}
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static int hotplug_callback_detach (libusb_context *ctx, libusb_device *dev, libusb_hotplug_event event, void *user_data) {
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printf ("Device detached\n");
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libusb_close (handle);
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done++;
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return 0;
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}
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int main (int argc, char *argv[]) {
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libusb_hotplug_callback_handle hp[2];
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int product_id, vendor_id, class_id;
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int rc;
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vendor_id = (argc > 1) ? strtol (argv[1], NULL, 0) : 0x045a;
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product_id = (argc > 2) ? strtol (argv[2], NULL, 0) : 0x5005;
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class_id = (argc > 3) ? strtol (argv[3], NULL, 0) : LIBUSB_HOTPLUG_MATCH_ANY;
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libusb_init (NULL);
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if (!libusb_has_capability (LIBUSB_CAP_HAS_HOTPLUG)) {
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printf ("Hotplug not supported by this build of libusb\n");
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libusb_exit (NULL);
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return EXIT_FAILURE;
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}
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rc = libusb_hotplug_register_callback (NULL, LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED, 0, vendor_id,
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product_id, class_id, hotplug_callback, NULL, &hp[0]);
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if (LIBUSB_SUCCESS != rc) {
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fprintf (stderr, "Error registering callback 0\n");
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libusb_exit (NULL);
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return EXIT_FAILURE;
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}
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rc = libusb_hotplug_register_callback (NULL, LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT, 0, vendor_id,
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product_id,class_id, hotplug_callback_detach, NULL, &hp[1]);
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if (LIBUSB_SUCCESS != rc) {
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fprintf (stderr, "Error registering callback 1\n");
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libusb_exit (NULL);
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return EXIT_FAILURE;
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}
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while (done < 2) {
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libusb_handle_events (NULL);
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}
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libusb_exit (NULL);
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}
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