linux 读取usb数据

#include <stdio.h>
#include <stdlib.h>
#include <libusb.h>

int main() {
    libusb_device **devs;
    libusb_device_handle *dev_handle;
    ssize_t cnt;
    unsigned char data[64];

    // 初始化libusb
    if (libusb_init(NULL) < 0) {
        fprintf(stderr, "Failed to initialize libusb\n");
        return 1;
    }

    // 获取设备列表
    cnt = libusb_get_device_list(NULL, &devs);
    if (cnt < 0) {
        fprintf(stderr, "Failed to get device list\n");
        libusb_exit(NULL);
        return 1;
    }

    // 打开第一个USB设备
    dev_handle = libusb_open_device_with_vid_pid(NULL, VENDOR_ID, PRODUCT_ID);
    if (dev_handle == NULL) {
        fprintf(stderr, "Failed to open USB device\n");
        libusb_free_device_list(devs, 1);
        libusb_exit(NULL);
        return 1;
    }

    // 确保设备配置正确
    if (libusb_set_configuration(dev_handle, 1) < 0) {
        fprintf(stderr, "Failed to set configuration\n");
        libusb_close(dev_handle);
        libusb_free_device_list(devs, 1);
        libusb_exit(NULL);
        return 1;
    }

    // 读取数据
    int transferred;
    if (libusb_bulk_transfer(dev_handle, ENDPOINT_IN, data, sizeof(data), &transferred, 0) < 0) {
        fprintf(stderr, "Bulk transfer failed\n");
    } else {
        printf("Received %d bytes: ", transferred);
        for (int i = 0; i < transferred; i++) {
            printf("%02x ", data[i]);
        }
        printf("\n");
    }

    // 清理
    libusb_close(dev_handle);
    libusb_free_device_list(devs, 1);
    libusb_exit(NULL);

    return 0;
}