QT调用最新的libusb库

一：下载libusb文件

下载最新的库的下载网站：https://libusb.info/

下载：

解压后目录如下：

二：库文件添加QT中

根据自己的编译器选择库：

①将头文件中添加libusb.h

②源文件中添加libusb-1.0.lib

③添加库文件：

三：编译工程

添加库后直接编译，不报错即为成功：

四：example

参考例程中的调用方法：

/*
* Test suite program based of libusb-0.1-compat testlibusb
* Copyright (c) 2013 Nathan Hjelm <hjelmn@mac.ccom>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include <stdio.h>
#include <string.h>
#include "libusb.h"

int verbose = 0;

static void print_endpoint_comp(const struct libusb_ss_endpoint_companion_descriptor *ep_comp)
{
	printf("      USB 3.0 Endpoint Companion:\n");
	printf("        bMaxBurst:           %u\n", ep_comp->bMaxBurst);
	printf("        bmAttributes:        %02xh\n", ep_comp->bmAttributes);
	printf("        wBytesPerInterval:   %u\n", ep_comp->wBytesPerInterval);
}

static void print_endpoint(const struct libusb_endpoint_descriptor *endpoint)
{
	int i, ret;

	printf("      Endpoint:\n");
	printf("        bEndpointAddress:    %02xh\n", endpoint->bEndpointAddress);
	printf("        bmAttributes:        %02xh\n", endpoint->bmAttributes);
	printf("        wMaxPacketSize:      %u\n", endpoint->wMaxPacketSize);
	printf("        bInterval:           %u\n", endpoint->bInterval);
	printf("        bRefresh:            %u\n", endpoint->bRefresh);
	printf("        bSynchAddress:       %u\n", endpoint->bSynchAddress);

	for (i = 0; i < endpoint->extra_length;) {
		if (LIBUSB_DT_SS_ENDPOINT_COMPANION == endpoint->extra[i + 1]) {
			struct libusb_ss_endpoint_companion_descriptor *ep_comp;

			ret = libusb_get_ss_endpoint_companion_descriptor(NULL, endpoint, &ep_comp);
			if (LIBUSB_SUCCESS != ret)
				continue;

			print_endpoint_comp(ep_comp);

			libusb_free_ss_endpoint_companion_descriptor(ep_comp);
		}

		i += endpoint->extra[i];
	}
}

static void print_altsetting(const struct libusb_interface_descriptor *interface)
{
	uint8_t i;

	printf("    Interface:\n");
	printf("      bInterfaceNumber:      %u\n", interface->bInterfaceNumber);
	printf("      bAlternateSetting:     %u\n", interface->bAlternateSetting);
	printf("      bNumEndpoints:         %u\n", interface->bNumEndpoints);
	printf("      bInterfaceClass:       %u\n", interface->bInterfaceClass);
	printf("      bInterfaceSubClass:    %u\n", interface->bInterfaceSubClass);
	printf("      bInterfaceProtocol:    %u\n", interface->bInterfaceProtocol);
	printf("      iInterface:            %u\n", interface->iInterface);

	for (i = 0; i < interface->bNumEndpoints; i++)
		print_endpoint(&interface->endpoint[i]);
}

static void print_2_0_ext_cap(struct libusb_usb_2_0_extension_descriptor *usb_2_0_ext_cap)
{
	printf("    USB 2.0 Extension Capabilities:\n");
	printf("      bDevCapabilityType:    %u\n", usb_2_0_ext_cap->bDevCapabilityType);
	printf("      bmAttributes:          %08xh\n", usb_2_0_ext_cap->bmAttributes);
}

static void print_ss_usb_cap(struct libusb_ss_usb_device_capability_descriptor *ss_usb_cap)
{
	printf("    USB 3.0 Capabilities:\n");
	printf("      bDevCapabilityType:    %u\n", ss_usb_cap->bDevCapabilityType);
	printf("      bmAttributes:          %02xh\n", ss_usb_cap->bmAttributes);
	printf("      wSpeedSupported:       %u\n", ss_usb_cap->wSpeedSupported);
	printf("      bFunctionalitySupport: %u\n", ss_usb_cap->bFunctionalitySupport);
	printf("      bU1devExitLat:         %u\n", ss_usb_cap->bU1DevExitLat);
	printf("      bU2devExitLat:         %u\n", ss_usb_cap->bU2DevExitLat);
}

static void print_bos(libusb_device_handle *handle)
{
	struct libusb_bos_descriptor *bos;
	uint8_t i;
	int ret;

	ret = libusb_get_bos_descriptor(handle, &bos);
	if (ret < 0)
		return;

	printf("  Binary Object Store (BOS):\n");
	printf("    wTotalLength:            %u\n", bos->wTotalLength);
	printf("    bNumDeviceCaps:          %u\n", bos->bNumDeviceCaps);

	for (i = 0; i < bos->bNumDeviceCaps; i++) {
		struct libusb_bos_dev_capability_descriptor *dev_cap = bos->dev_capability[i];

		if (dev_cap->bDevCapabilityType == LIBUSB_BT_USB_2_0_EXTENSION) {
			struct libusb_usb_2_0_extension_descriptor *usb_2_0_extension;

			ret = libusb_get_usb_2_0_extension_descriptor(NULL, dev_cap, &usb_2_0_extension);
			if (ret < 0)
				return;

			print_2_0_ext_cap(usb_2_0_extension);
			libusb_free_usb_2_0_extension_descriptor(usb_2_0_extension);
		} else if (dev_cap->bDevCapabilityType == LIBUSB_BT_SS_USB_DEVICE_CAPABILITY) {
			struct libusb_ss_usb_device_capability_descriptor *ss_dev_cap;

			ret = libusb_get_ss_usb_device_capability_descriptor(NULL, dev_cap, &ss_dev_cap);
			if (ret < 0)
				return;

			print_ss_usb_cap(ss_dev_cap);
			libusb_free_ss_usb_device_capability_descriptor(ss_dev_cap);
		}
	}

	libusb_free_bos_descriptor(bos);
}

static void print_interface(const struct libusb_interface *interface)
{
	int i;

	for (i = 0; i < interface->num_altsetting; i++)
		print_altsetting(&interface->altsetting[i]);
}

static void print_configuration(struct libusb_config_descriptor *config)
{
	uint8_t i;

	printf("  Configuration:\n");
	printf("    wTotalLength:            %u\n", config->wTotalLength);
	printf("    bNumInterfaces:          %u\n", config->bNumInterfaces);
	printf("    bConfigurationValue:     %u\n", config->bConfigurationValue);
	printf("    iConfiguration:          %u\n", config->iConfiguration);
	printf("    bmAttributes:            %02xh\n", config->bmAttributes);
	printf("    MaxPower:                %u\n", config->MaxPower);

	for (i = 0; i < config->bNumInterfaces; i++)
		print_interface(&config->interface[i]);
}

static void print_device(libusb_device *dev, libusb_device_handle *handle)
{
	struct libusb_device_descriptor desc;
	unsigned char string[256];
	const char *speed;
	int ret;
	uint8_t i;

	switch (libusb_get_device_speed(dev)) {
	case LIBUSB_SPEED_LOW:		speed = "1.5M"; break;
	case LIBUSB_SPEED_FULL:		speed = "12M"; break;
	case LIBUSB_SPEED_HIGH:		speed = "480M"; break;
	case LIBUSB_SPEED_SUPER:	speed = "5G"; break;
	case LIBUSB_SPEED_SUPER_PLUS:	speed = "10G"; break;
	default:			speed = "Unknown";
	}

	ret = libusb_get_device_descriptor(dev, &desc);
	if (ret < 0) {
		fprintf(stderr, "failed to get device descriptor");
		return;
	}

	printf("Dev (bus %u, device %u): %04X - %04X speed: %s\n",
	       libusb_get_bus_number(dev), libusb_get_device_address(dev),
	       desc.idVendor, desc.idProduct, speed);

	if (!handle)
		libusb_open(dev, &handle);

	if (handle) {
		if (desc.iManufacturer) {
			ret = libusb_get_string_descriptor_ascii(handle, desc.iManufacturer, string, sizeof(string));
			if (ret > 0)
				printf("  Manufacturer:              %s\n", (char *)string);
		}

		if (desc.iProduct) {
			ret = libusb_get_string_descriptor_ascii(handle, desc.iProduct, string, sizeof(string));
			if (ret > 0)
				printf("  Product:                   %s\n", (char *)string);
		}

		if (desc.iSerialNumber && verbose) {
			ret = libusb_get_string_descriptor_ascii(handle, desc.iSerialNumber, string, sizeof(string));
			if (ret > 0)
				printf("  Serial Number:             %s\n", (char *)string);
		}
	}

	if (verbose) {
		for (i = 0; i < desc.bNumConfigurations; i++) {
			struct libusb_config_descriptor *config;

			ret = libusb_get_config_descriptor(dev, i, &config);
			if (LIBUSB_SUCCESS != ret) {
				printf("  Couldn't retrieve descriptors\n");
				continue;
			}

			print_configuration(config);

			libusb_free_config_descriptor(config);
		}

		if (handle && desc.bcdUSB >= 0x0201)
			print_bos(handle);
	}

	if (handle)
		libusb_close(handle);
}

#ifdef __linux__
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>

static int test_wrapped_device(const char *device_name)
{
	libusb_device_handle *handle;
	int r, fd;

	fd = open(device_name, O_RDWR);
	if (fd < 0) {
		printf("Error could not open %s: %s\n", device_name, strerror(errno));
		return 1;
	}
	r = libusb_wrap_sys_device(NULL, fd, &handle);
	if (r) {
		printf("Error wrapping device: %s: %s\n", device_name, libusb_strerror(r));
		close(fd);
		return 1;
	}
	print_device(libusb_get_device(handle), handle);
	close(fd);
	return 0;
}
#else
static int test_wrapped_device(const char *device_name)
{
	(void)device_name;
	printf("Testing wrapped devices is not supported on your platform\n");
	return 1;
}
#endif

int main(int argc, char *argv[])
{
	const char *device_name = NULL;
	libusb_device **devs;
	ssize_t cnt;
	int r, i;

	for (i = 1; i < argc; i++) {
		if (!strcmp(argv[i], "-v")) {
			verbose = 1;
		} else if (!strcmp(argv[i], "-d") && (i + 1) < argc) {
			i++;
			device_name = argv[i];
		} else {
			printf("Usage %s [-v] [-d </dev/bus/usb/...>]\n", argv[0]);
			printf("Note use -d to test libusb_wrap_sys_device()\n");
			return 1;
		}
	}

	r = libusb_init_context(/*ctx=*/NULL, /*options=*/NULL, /*num_options=*/0);
	if (r < 0)
		return r;

	if (device_name) {
		r = test_wrapped_device(device_name);
	} else {
		cnt = libusb_get_device_list(NULL, &devs);
		if (cnt < 0) {
			libusb_exit(NULL);
			return 1;
		}

		for (i = 0; devs[i]; i++)
			print_device(devs[i], NULL);

		libusb_free_device_list(devs, 1);
	}

	libusb_exit(NULL);
	return r;
}