public static List <HIDDeviceAvalible> GetDevicesListByVID(int nVid)
{
List <HIDDeviceAvalible> devices = new List <HIDDeviceAvalible>();
string strSearch = string.Format("vid_{0:x4}&pid_", nVid);
Guid gHid;
HidD_GetHidGuid(out gHid);
IntPtr hInfoSet = SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
try
{
uint nIndex = 0;
DeviceInterfaceData oInterface = new DeviceInterfaceData();
oInterface.Size = Marshal.SizeOf(oInterface);
while (SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid, nIndex, ref oInterface))
{
string strDevicePath = GetDevicePath(hInfoSet, ref oInterface);
if (strDevicePath.IndexOf(strSearch) >= 0)
{
HIDDeviceAvalible device = new HIDDeviceAvalible();
device.Path = strDevicePath;
device.Description = HIDDevice.GetProductString(device.Path);
int cut = device.Path.IndexOf("vid_");
string xid_start = device.Path.Substring(cut + 4);
device.VendorId = Convert.ToUInt16(xid_start.Substring(0, 4), 16);
cut = device.Path.IndexOf("pid_");
xid_start = device.Path.Substring(cut + 4);
device.ProductId = Convert.ToUInt16(xid_start.Substring(0, 4), 16);
if (!String.IsNullOrEmpty(device.Description))
{
devices.Add(device);
}
}
nIndex++;
}
}
catch (Exception ex)
{
throw HIDDeviceException.GenerateError(ex.ToString());
}
finally
{
SetupDiDestroyDeviceInfoList(hInfoSet);
}
return(devices);
}
public static HIDDevice OpenDevice(string device_path, Type oType)
{
try
{
HIDDevice oNewDevice = (HIDDevice)Activator.CreateInstance(oType);
oNewDevice.Initialise(device_path);
return(oNewDevice);
}
catch (Exception ex)
{
throw HIDDeviceException.GenerateError(ex.ToString());
}
}
/// <summary>
/// Finds a device given its PID and VID
/// </summary>
/// <param name="nVid">Vendor id for device (VID)</param>
/// <param name="nPid">Product id for device (PID)</param>
/// <param name="oType">Type of device class to create</param>
/// <returns>A new device class of the given type or null</returns>
public static HIDDevice FindDevice(int nVid, int nPid, Type oType)
{
string strPath = string.Empty;
string strSearch = string.Format("vid_{0:x4}&pid_{1:x4}", nVid, nPid);
Guid gHid = HIDGuid;
HidD_GetHidGuid(out gHid);
IntPtr hInfoSet = SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
try
{
int nIndex = 0;
DeviceInterfaceData oInterface = new DeviceInterfaceData();
oInterface.Size = Marshal.SizeOf(oInterface);
while (SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid, (uint)nIndex, ref oInterface))
{
string strDevicePath = GetDevicePath(hInfoSet, ref oInterface);
if (strDevicePath.IndexOf(strSearch) >= 0)
{
HIDDevice oNewDevice = (HIDDevice)Activator.CreateInstance(oType);
oNewDevice.Initialise(strDevicePath);
return(oNewDevice);
}
nIndex++;
}
}
catch (Exception ex)
{
throw HIDDeviceException.GenerateError(ex.ToString());
}
finally
{
SetupDiDestroyDeviceInfoList(hInfoSet);
}
return(null);
}
