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97 lines
2.8 KiB
97 lines
2.8 KiB
/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ |
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/* |
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* libusb example program for hotplug API |
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* Copyright © 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 "libusb.h" |
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int done = 0; |
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libusb_device_handle *handle; |
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static int LIBUSB_CALL hotplug_callback(libusb_context *ctx, libusb_device *dev, libusb_hotplug_event event, void *user_data) |
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{ |
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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 attached: %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 LIBUSB_CALL hotplug_callback_detach(libusb_context *ctx, libusb_device *dev, libusb_hotplug_event event, void *user_data) |
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{ |
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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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{ |
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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 capabilites are not supported on this platform\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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