/// <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, HIDDevice device)
{
string strPath = string.Empty;
string strSearch = string.Format("vid_{0:x4}&pid_{1:x4}", nVid, nPid); // first, build the path search string
Guid gHid = HIDGuid;
//HidD_GetHidGuid(out gHid); // next, get the GUID from Windows that it uses to represent the HID USB interface
IntPtr hInfoSet = SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT); // this gets a list of all HID devices currently connected to the computer (InfoSet)
try
{
DeviceInterfaceData oInterface = new DeviceInterfaceData(); // build up a device interface data block
oInterface.Size = Marshal.SizeOf(oInterface);
// Now iterate through the InfoSet memory block assigned within Windows in the call to SetupDiGetClassDevs
// to get device details for each device connected
int nIndex = 0;
while (SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid, (uint)nIndex, ref oInterface)) // this gets the device interface information for a device at index 'nIndex' in the memory block
{
string strDevicePath = GetDevicePath(hInfoSet, ref oInterface); // get the device path (see helper method 'GetDevicePath')
if (strDevicePath.IndexOf(strSearch) >= 0) // do a string search, if we find the VID/PID string then we found our device!
{
device.Initialise(strDevicePath); // initialise it with the device path
return(device); // and return it
}
nIndex++; // if we get here, we didn't find our device. So move on to the next one.
}
}
catch (Exception ex)
{
throw HIDDeviceException.GenerateError(ex.ToString());
//Console.WriteLine(ex.ToString());
}
finally
{
// Before we go, we have to free up the InfoSet memory reserved by SetupDiGetClassDevs
SetupDiDestroyDeviceInfoList(hInfoSet);
}
return(null); // oops, didn't find our device
}
/// <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 nProduct)
{
string strPath = string.Empty;
string strSearch = string.Format("vid_{0:x4}&pid_{1:x4}", nVid, nPid); // first, build the path search string
Guid gHid = HIDGuid;
// next, get the GUID from Windows that it uses to represent the HID USB interface
//HidD_GetHidGuid(out gHid);
// this gets a list of all HID devices currently connected to the computer (InfoSet)
IntPtr hInfoSet = SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
//IntPtr hInfoSet = SetupDiGetClassDevs(ref gHid, "USB", IntPtr.Zero, DIGCF_ALLCLASSES | DIGCF_PRESENT);
try
{
DeviceInterfaceData oInterface = new DeviceInterfaceData(); // build up a device interface data block
oInterface.Size = Marshal.SizeOf(oInterface);
// Now iterate through the InfoSet memory block assigned within Windows in the call to SetupDiGetClassDevs
// to get device details for each device connected
int nIndex = 0;
// this gets the device interface information for a device at index 'nIndex' in the memory block
while (SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid, (uint)nIndex, ref oInterface))
{
string strDevicePath = GetDevicePath(hInfoSet, ref oInterface); // get the device path (see helper method 'GetDevicePath')
if (strDevicePath.IndexOf(strSearch) >= 0) // do a string search, if we find the VID/PID string then we found our device!
{
HIDDevice oNewDevice = (HIDDevice)Activator.CreateInstance(oType); // create an instance of the class for this device
oNewDevice.Initialise(strDevicePath); // initialise it with the device path
if (String.IsNullOrEmpty(nProduct))
{
return(oNewDevice); // возвращяем первый попавшийся девайс, если нет предпочтения определённому производителю
}
else
{
string deviceProduct = null;
byte[] arrBuff = new byte[255];
// читаем производителя с девайса
HidD_GetProductString(oNewDevice.m_hHandle, arrBuff, arrBuff.Length);
// переводим массив в строку
foreach (char b in arrBuff)
{
// нет проверки на спец знаки\символы
if (b != 0)
{
deviceProduct += b.ToString();
}
}
// от возникновения мелких ошибок написания в разных регистрах
nProduct = nProduct.ToLower();
deviceProduct = deviceProduct.ToLower();
// ну и проверяем - тот ли производитель
if (String.Equals(nProduct, deviceProduct))
{
return(oNewDevice);
}
else
{
oNewDevice.Dispose(); // закрываем девайс, он нам не подходит
}
}
}
nIndex++; // if we get here, we didn't find our device. So move on to the next one.
}
}
catch (Exception ex)
{
throw HIDDeviceException.GenerateError(ex.ToString());
//Console.WriteLine(ex.ToString());
}
finally
{
// Before we go, we have to free up the InfoSet memory reserved by SetupDiGetClassDevs
SetupDiDestroyDeviceInfoList(hInfoSet);
}
return(null); // oops, didn't find our device
}
/// <summary>
/// Return a list information of connected USB HID devices
/// </summary>
public static List <HIDInfoSet> GetInfoSets(int?VendorID, int?ProductID, string SerialNumber)
{
string strSearch;
if ((VendorID != null) && (ProductID != null))
{
strSearch = string.Format("vid_{0:x4}&pid_{1:x4}", VendorID, ProductID); // first, build the path search string
}
else if (VendorID != null)
{
strSearch = string.Format("vid_{0:x4}&pid_", VendorID); // first, build the path search string
}
else
{
strSearch = "vid_";
}
List <HIDInfoSet> connectedDeviceList = new List <HIDInfoSet>();
Guid gHid = HIDGuid; // get the GUID from Windows that it uses to represent the HID USB interface
IntPtr hInfoSet = SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
if (hInfoSet == InvalidHandleValue)
{
throw new Win32Exception();
}
try
{
var oInterface = new DeviceInterfaceData();
oInterface.Size = Marshal.SizeOf(oInterface);
int nIndex = 0;
while (SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid, (uint)nIndex, ref oInterface))
{
var strDevicePath = GetDevicePath(hInfoSet, ref oInterface);
// do a string search, if we find the VID/PID string then we found our device!
if (strDevicePath.IndexOf(strSearch) >= 0)
{
var handle = Open(strDevicePath);
if (handle != InvalidHandleValue)
{
IntPtr ptrToPreParsedData;
if (HidD_GetPreparsedData(handle, out ptrToPreParsedData))
{
HIDD_ATTRIBUTES attributes;
HidP_Caps caps;
// check device serial number, if specify
if (((SerialNumber != null) && (GetSerialNumber(handle) == SerialNumber)) || (SerialNumber == null))
{
// Get founded HID device informations
var manufacturerString = GetManufacturerString(handle);
var productString = GetProductString(handle);
var serialNumberString = GetSerialNumber(handle);
GetAttr(handle, out attributes);
GetCaps(ptrToPreParsedData, out caps);
// Add founded HID device to connection list
connectedDeviceList.Add(new HIDInfoSet(manufacturerString,
productString,
serialNumberString,
strDevicePath,
attributes.VendorID,
attributes.ProductID,
attributes.VersionNumber,
caps.InputReportByteLength,
caps.OutputReportByteLength));
}
if (handle != IntPtr.Zero)
{
CloseHandle(handle);
}
}
}
}
nIndex++;
}
}
catch (Exception ex)
{
throw HIDDeviceException.GenerateError(ex.ToString());
}
finally
{
// Before we go, we have to free up the InfoSet memory reserved by SetupDiGetClassDevs
SetupDiDestroyDeviceInfoList(hInfoSet);
}
return(connectedDeviceList);
}
