qt usb linux 通信

#include <QCoreApplication>
#include <QDebug>
#include <libusb.h>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    libusb_context *context = nullptr;
    int result = libusb_init(&context);
    if (result < 0) {
        qDebug() << "Failed to initialize libusb";
        return -1;
    }

    libusb_device **devs;
    ssize_t cnt = libusb_get_device_list(context, &devs);
    if (cnt < 0) {
        qDebug() << "Failed to get device list";
        libusb_exit(context);
        return -1;
    }

    for (ssize_t i = 0; i < cnt; ++i) {
        libusb_device *dev = devs[i];
        struct libusb_device_descriptor desc;
        result = libusb_get_device_descriptor(dev, &desc);
        if (result < 0) {
            qDebug() << "Failed to get device descriptor";
            continue;
        }

        qDebug() << "Device ID:" << desc.idVendor << ":" << desc.idProduct;
    }

    libusb_free_device_list(devs, 1);
    libusb_exit(context);

    return a.exec();
}