linux usb接口编程

#include <libusb-1.0/libusb.h>
#include <stdio.h>

int main() {
    libusb_context *context = NULL;
    libusb_device **list;
    ssize_t count;

    // 初始化libusb
    int result = libusb_init(&context);
    if (result < 0) {
        fprintf(stderr, "Failed to initialize libusb: %s\n", libusb_error_name(result));
        return 1;
    }

    // 获取设备列表
    count = libusb_get_device_list(context, &list);
    if (count < 0) {
        fprintf(stderr, "Failed to get device list: %s\n", libusb_error_name(count));
        libusb_exit(context);
        return 1;
    }

    // 枚举设备
    for (ssize_t i = 0; i < count; i++) {
        libusb_device *device = list[i];
        struct libusb_device_descriptor desc;
        result = libusb_get_device_descriptor(device, &desc);
        if (result < 0) {
            fprintf(stderr, "Failed to get device descriptor: %s\n", libusb_error_name(result));
            continue;
        }
        printf("Device %zd: Vendor ID = 0x%04x, Product ID = 0x%04x\n", i, desc.idVendor, desc.idProduct);
    }

    // 释放设备列表
    libusb_free_device_list(list, 1);

    // 退出libusb
    libusb_exit(context);
    return 0;
}

gcc -o usb_example usb_example.c -lusb-1.0
sudo ./usb_example