/// <summary>
/// Constructs a new USB device
/// </summary>
/// <param name="devicePathName">Device path name of the USB device to create</param>
public USBDevice(string devicePathName)
{
Descriptor = GetDeviceDescriptor(devicePathName);
_wuDevice = new API.WinUSBDevice();
try
{
_wuDevice.OpenDevice(devicePathName);
InitializeInterfaces();
}
catch (API.APIException e)
{
_wuDevice.Dispose();
throw new USBException("Failed to open device.", e);
}
}
private static USBDeviceDescriptor GetDeviceDescriptor(string devicePath)
{
try
{
USBDeviceDescriptor descriptor;
using (API.WinUSBDevice wuDevice = new API.WinUSBDevice())
{
wuDevice.OpenDevice(devicePath);
API.USB_DEVICE_DESCRIPTOR deviceDesc = wuDevice.GetDeviceDescriptor();
// Patch from https://delog.wordpress.com/2013/06/19/winusbnet-patch-to-handle-language-id/
string q = wuDevice.GetStringDescriptor(0, 0);
if (q.Length == 0)
throw new USBException("Failed to get USB string descriptor (0).");
// TODO: Using the first language id. Need to improve API.
ushort langID = q[0];
string manufacturer = null, product = null, serialNumber = null;
byte idx = 0;
idx = deviceDesc.iManufacturer;
if (idx > 0)
manufacturer = wuDevice.GetStringDescriptor(idx, langID);
idx = deviceDesc.iProduct;
if (idx > 0)
product = wuDevice.GetStringDescriptor(idx, langID);
/*idx = deviceDesc.iSerialNumber;
if (idx > 0)
serialNumber = wuDevice.GetStringDescriptor(idx, langID);*/
descriptor = new USBDeviceDescriptor(devicePath, deviceDesc, manufacturer, product, serialNumber);
}
return descriptor;
}
catch (API.APIException e)
{
throw new USBException("Failed to retrieve device descriptor.", e);
}
}
private static USBDeviceDescriptor GetDeviceDescriptor(string devicePath)
{
try
{
USBDeviceDescriptor descriptor;
using (API.WinUSBDevice wuDevice = new API.WinUSBDevice())
{
wuDevice.OpenDevice(devicePath);
API.USB_DEVICE_DESCRIPTOR deviceDesc = wuDevice.GetDeviceDescriptor();
// string q = wuDevice.GetStringDescriptor(0);
// TODO: use language id properly
string manufacturer = null, product = null, serialNumber = null;
byte idx = 0;
idx = deviceDesc.iManufacturer;
if (idx > 0)
manufacturer = wuDevice.GetStringDescriptor(idx);
idx = deviceDesc.iProduct;
if (idx > 0)
product = wuDevice.GetStringDescriptor(idx);
idx = deviceDesc.iSerialNumber;
if (idx > 0)
serialNumber = wuDevice.GetStringDescriptor(idx);
descriptor = new USBDeviceDescriptor(devicePath, deviceDesc, manufacturer, product, serialNumber);
}
return descriptor;
}
catch (API.APIException e)
{
throw new USBException("Failed to retrieve device descriptor.", e);
}
}