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请看以下代码，该代码用于获取连接的 USB 设备列表

#include <lusb0_usb.h>
#include <iostream>

using namespace std;

int main()
{
    usb_init();
    usb_find_busses();
    usb_find_devices();

    struct usb_bus *busses = usb_get_busses();
    struct usb_bus *bus;
    struct usb_device *dev;


    for(bus=busses;bus;bus=bus->next)
    {
        for(dev=bus->devices;dev;dev->next)
        {
            cout << dev->descriptor.iProduct << endl;
        }
    }
}

当我运行这段代码时，我得到

Starting C:\Users\yohan\Documents\QTPeojects\USB-build-Desktop_Qt_5_0_0_beta2_MSVC2010_32bit_SDK-Release\release\USB.exe...
C:\Users\yohan\Documents\QTPeojects\USB-build-Desktop_Qt_5_0_0_beta2_MSVC2010_32bit_SDK-Release\release\USB.exe exited with code 0

我相信我做错了这段代码。我该如何纠正？

4

2 回答 2

0

它可能运行良好。您需要暂停控制台以便查看输出。

尝试添加

#include <conio.h> 

_getch();

或者使用其他一些技术来暂停并等待用户输入。

于 2013-05-12T15:39:39.860 回答
0

以下代码适用于 Objective-C：

libusb_device **devs; //pointer to pointer of device, used to retrieve a list of devices
ssize_t cnt; //holding number of devices in list
//libusb_set_debug(ctx, 3); //set verbosity level to 3, as suggested in the documentation
cnt = libusb_get_device_list(ctx, &devs); //get the list of devices
if(cnt < 0) {
    return false;
    //there was an error
}
//print total number of usb devices
ssize_t i; //for iterating through the list
for(i = 0; i < cnt; i++) {
    struct libusb_device_descriptor desc;
    if (libusb_get_device_descriptor(devs[i], &desc) >= 0) {
        if ((desc.idVendor == 0x04D8) && (desc.idProduct == 0x0204)){
            libusb_free_device_list(devs, 1);
            return true;
        }
    }
}
libusb_free_device_list(devs, 1); //free the list, unref the devices in it

return false;

我相信您需要改用“descriptor.i d Product”。

于 2013-05-23T02:47:50.160 回答