我在Mac OS X v10.10(优胜美地)环境中使用libusb 0.1和Qt。我的目标是获取所有连接的USB密钥的序列号(usbclass = 8)。在Mac OS X上检索USB设备的序列号问题
通常第一次阅读正常发生,我不明白为什么,但有时从后续的读数中,设备不再被检测到。有时我会在usb_get_string_simple(handle, device->descriptor.iSerialNumber)
函数上得到-60错误代码。我该如何解决这个问题?
我试过使用FAT,FAT32和NTFS文件系统的USB密钥,但它们都有同样的问题。
在同一个项目中,我使用libusb通过连接到Mac的打印机设备读取/写入数据,并且还读取了串行数字。这种类型的设备没有问题。这么奇怪。
在.pro文件:
INCLUDEPATH += /Users/sborfedor/Desktop/root/current/includes
DEPENDPATH += /Users/sborfedor/Desktop/root/current/includes
LIBS += -L/Users/sborfedor/Desktop/root/current/bin_osx/libs/ -lusb-legacy
DESTDIR = /Users/sborfedor/Desktop/root/current/bin_osx
这是我的代码:
void MainWindow::run() {
struct usb_bus* bus = NULL;
struct usb_device* device = NULL;
const int MASSSTORAGE_CLASS = 8;
usb_init();
usb_set_debug(3);
usb_find_busses();
usb_find_devices();
int ret;
for (bus = usb_get_busses(); bus; bus = bus->next) {
for (device = bus->devices; device; device = device->next) {
if (device->descriptor.bDeviceClass != MASSSTORAGE_CLASS && device->descriptor.bDeviceClass != 0) {
continue;
}
for (int cid = 0; cid < device->descriptor.bNumConfigurations; ++cid) {
struct usb_config_descriptor* config = &(device->config[cid]);
if (config == NULL)
continue;
for (int iid = 0; iid < config->bNumInterfaces; ++iid) {
struct usb_interface* interface = &(config->interface[iid]);
if (interface == NULL)
continue;
usb_dev_handle* handle = usb_open(device);
if (handle == NULL)
continue;
for (int sid = 0; sid < interface->num_altsetting; sid++) {
struct usb_interface_descriptor* settings = &(interface->altsetting[sid]);
if (settings == NULL)
continue;
int usbClass = device->descriptor.bDeviceClass;
if (usbClass == 0) {
usbClass = settings->bInterfaceClass;
}
if (usbClass != MASSSTORAGE_CLASS)
continue;
char device_serial_number[255];
ret = usb_get_string_simple(handle, device->descriptor.iSerialNumber, device_serial_number, sizeof(device_serial_number));
if (ret > 0) {
qDebug() << "SERIAL_NUMBER="<<QString(device_serial_number);
} else {
qDebug() << "*** usb_get_string_simple(handle, device->descriptor.iSerialNumber, device_serial_number, USBX_DEVICE_SERIAL_NUMBER_MAX_SIZE) RET="<<ret;
}
}
usb_close(handle);
}
}
}
}
}
你是怎么安装'libusb'的? –
在同一个项目中,我使用libusb通过连接到Mac的打印机设备读取/写入数据,并读取连续数字。这种类型的设备没有问题。这么奇怪。我认为libusb安装正确。 – sborfedor
但你是如何安装它的? –