前面操作，使用c++ 实现

在C++中，使用libusb库进行USB设备的异步读写操作需要包含相应的头文件，并利用`libusb1`库提供的API。以下是C++版的基本异步读写流程：

#include <iostream>
#include "libusb.h"
#include <thread>

// 创建异步读写的辅助函数
void async_transfer(libusb_device* dev, uint8_t ep_in, uint8_t ep_out, std::vector<uint8_t>& data) {
    struct libusb_transfer* transfer;
    ssize_t transferred;

    // 设置回调函数，这里仅打印接收数据
    libusb_transfer_cb_fn_t callback = [](libusb_transfer* trans, unsigned char* user_data) {
        size_t len = trans->actual_length;
        std::cout << "Received " << len << " bytes" << std::endl;
    };

    // 准备读写请求
    libusb_fill_bulk_transfer(transfer, dev, ep_in, data.data(), data.size(), callback, nullptr, LIBUSB_TRANSFER_TIMEOUT_USEC(1000));

    if (!libusb_submit_transfer(transfer)) {
        std::cerr << "Failed to submit transfer: " << libusb_error_name(transfer->status) << std::endl;
        return;
    }

    std::cout << "Transfer started..." << std::endl;

    // 轮询等待数据接收完毕
    while (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
        libusb_handle_events(context, 1);
    }

    transferred = transfer->actual_length;
    std::cout << "Transferred " << transferred << " bytes." << std::endl;

    // 清理资源
    libusb_free_transfer(transfer);
}

int main() {
    // 初始化libusb上下文
    libusb_context* context = libusb_init(nullptr);

    // 替换为实际的设备地址和端点
    libusb_device* dev = libusb_open_device_with_vid_pid(context, VENDOR_ID, PRODUCT_ID);
    if (!dev) {
        std::cerr << "Failed to open device." << std::endl;
        return -1;
    }

    // 假设ep_in为IN端口，ep_out为OUT端口
    uint8_t ep_in = ...;
    uint8_t ep_out = ...;
    std::vector<uint8_t> data;

    // 创建线程进行异步读写
    std::thread async_thread(async_transfer, dev, ep_in, ep_out, std::move(data));
    async_thread.detach();  // 防止主线程阻塞

    // 关闭设备和清理上下文
    libusb_close(dev);
    libusb_exit(context);

    return 0;
}