Linux libusb 安装及简单使用

Ubuntu下最简单的安装方法： sudo apt-get install libusb-dev

也可按照下面的方法，自己编译，安装，新手建议使用apt-get install 的方法安装

一、参考文档：

    1. libusb1 fails do_configure task with “udev support requested but libudev not installed”

        http://stackoverflow.com/questions/23712859/libusb1-fails-do-configure-task-with-udev-support-requested-but-libudev-not-ins
    2. libusb compilation error on slackware 14

        http://stackoverflow.com/questions/29552267/libusb-compilation-error-on-slackware-14
    3. Jan Axelson's Generic HID example under Linux with libusb

        http://www.microchip.com/forums/m340898.aspx
    4. Slackware- usb library

        http://www.linuxquestions.org/questions/slackware-14/slackware-usb-library-4175475048/
二、下载libusb：

    1. 网址：http://www.libusb.org/

    2. 下载：libusb-1.0.9，跳转到解压，并安装：

        ./configure && make && make install；

    3. 下载：libusb-compat-0.1.4，跳转到解压，并安装(一定要安装，否则总是报各种错，本人用的是64位系统)：

        ./configure && make && make install；

三、libusb安装错误：

    1. 错误提示：

        checking for inline... inline

        checking operating system... Linux

        checking for library containing clock_gettime... -lrt

        checking libudev.h usability... no

        checking libudev.h presence... no

        checking for libudev.h... no

        configure: error: "udev support requested but libudev not installed"

    2. 解决方法：

        sudo apt-get install libudev-dev

四、Example：

   

#include <usb.h>
#include <stdio.h>

void print_endpoint(struct usb_endpoint_descriptor *endpoint)
{
printf(" bEndpointAddress: %02xh\n", endpoint->bEndpointAddress);
printf(" bmAttributes: %02xh\n", endpoint->bmAttributes);
printf(" wMaxPacketSize: %d\n", endpoint->wMaxPacketSize);
printf(" bInterval: %d\n", endpoint->bInterval);
printf(" bRefresh: %d\n", endpoint->bRefresh);
printf(" bSynchAddress: %d\n", endpoint->bSynchAddress);
}

void print_altsetting(struct usb_interface_descriptor *interface)
{
int i;

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

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

void print_interface(struct usb_interface *interface)
{
int i;

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

void print_configuration(struct usb_config_descriptor *config)
{
int i;

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

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

int main(void)
{
struct usb_bus *bus;
struct usb_device *dev;

usb_init();
usb_find_busses();
usb_find_devices();

printf("bus/device idVendor/idProduct\n");

for (bus = usb_busses; bus; bus = bus->next) {
for (dev = bus->devices; dev; dev = dev->next) {
int ret, i;
char string[256];
usb_dev_handle *udev;

printf("%s/%s %04X/%04X\n", bus->dirname, dev->filename,
dev->descriptor.idVendor, dev->descriptor.idProduct);

udev = usb_open(dev);
if (udev) {
if (dev->descriptor.iManufacturer) {
ret = usb_get_string_simple(udev, dev->descriptor.iManufacturer, string, sizeof(string));
if (ret > 0)
printf("- Manufacturer : %s\n", string);
else
printf("- Unable to fetch manufacturer string\n");
}

if (dev->descriptor.iProduct) {
ret = usb_get_string_simple(udev, dev->descriptor.iProduct, string, sizeof(string));
if (ret > 0)
printf("- Product : %s\n", string);
else
printf("- Unable to fetch product string\n");
}

if (dev->descriptor.iSerialNumber) {
ret = usb_get_string_simple(udev, dev->descriptor.iSerialNumber, string, sizeof(string));
if (ret > 0)
printf("- Serial Number: %s\n", string);
else
printf("- Unable to fetch serial number string\n");
}

usb_close (udev);
}

if (!dev->config) {
printf(" Couldn't retrieve descriptors\n");
continue;
}

for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
print_configuration(&dev->config);
}
}

return 0;
}