/// <summary>Callback function from the PI Engineering DLL, raised each time the device pushes a data packet</summary> /// <param name="data">The callback data</param> /// <param name="sourceDevice">The source device</param> /// <param name="error">The last error generated (if any)</param> public void HandlePIEHidData(byte[] data, PIEHid32Net.PIEDevice sourceDevice, int error) { if (myDevice == sourceDevice) { for (int r = 0; r < sourceDevice.ReadLength; r++) { currentState[r] = data[r]; } } }
/// <summary>Callback function from the PI Engineering DLL, raised if an error is encountered</summary> /// <param name="sourceDevices">The source device</param> /// <param name="error">The error</param> public void HandlePIEHidError(PIEHid32Net.PIEDevice sourceDevices, int error) { }
/// <summary> /// Enumerates all valid USB devics of the specified Vid. /// </summary> /// <returns>list of all devices found, ordered by USB port connection</returns> public static PIEDevice[] EnumeratePIE(Int32 vid) { LinkedList <PIEDevice> devices = new LinkedList <PIEDevice>(); // Get all device paths Guid guid = Guid.Empty; HidApiDeclarations.HidD_GetHidGuid(ref guid); IntPtr deviceInfoSet = DeviceManagementApiDeclarations.SetupDiGetClassDevs(ref guid, null, IntPtr.Zero, DeviceManagementApiDeclarations.DIGCF_PRESENT | DeviceManagementApiDeclarations.DIGCF_DEVICEINTERFACE); DeviceManagementApiDeclarations.SP_DEVICE_INTERFACE_DATA deviceInterfaceData = new DeviceManagementApiDeclarations.SP_DEVICE_INTERFACE_DATA(); deviceInterfaceData.cbSize = Marshal.SizeOf(deviceInterfaceData); //28; LinkedList <String> paths = new LinkedList <String>(); for (int i = 0; 0 != DeviceManagementApiDeclarations.SetupDiEnumDeviceInterfaces( deviceInfoSet, 0, ref guid, i, ref deviceInterfaceData); i++) { int buffSize = 0; DeviceManagementApiDeclarations.SetupDiGetDeviceInterfaceDetail(deviceInfoSet, ref deviceInterfaceData, IntPtr.Zero, 0, ref buffSize, IntPtr.Zero); // Use IntPtr to simulate detail data structure IntPtr detailBuffer = Marshal.AllocHGlobal(buffSize); // Simulate setting cbSize to 4 bytes + one character (seems to be what everyone has always done, even though it makes no sense) //onur modified for 64-bit compatibility - March 2009 if (IntPtr.Size == 8) //64-bit { Marshal.WriteInt32(detailBuffer, Marshal.SizeOf(typeof(IntPtr))); } else //32-bit { Marshal.WriteInt32(detailBuffer, 4 + Marshal.SystemDefaultCharSize); } if (DeviceManagementApiDeclarations.SetupDiGetDeviceInterfaceDetail(deviceInfoSet, ref deviceInterfaceData, detailBuffer, buffSize, ref buffSize, IntPtr.Zero)) { // convert buffer (starting past the cbsize variable) to string path paths.AddLast(Marshal.PtrToStringAuto(new IntPtr(detailBuffer.ToInt32() + 4))); } } DeviceManagementApiDeclarations.SetupDiDestroyDeviceInfoList(deviceInfoSet); //Security attributes not used anymore - not necessary Onur March 2009 // Open each device file and test for vid FileIOApiDeclarations.SECURITY_ATTRIBUTES securityAttributes = new FileIOApiDeclarations.SECURITY_ATTRIBUTES(); securityAttributes.lpSecurityDescriptor = IntPtr.Zero; securityAttributes.bInheritHandle = System.Convert.ToInt32(true); securityAttributes.nLength = Marshal.SizeOf(securityAttributes); for (LinkedList <String> .Enumerator en = paths.GetEnumerator(); en.MoveNext();) { String path = en.Current; SafeFileHandle fileHandle = FileIOApiDeclarations.CreateFile(path, FileIOApiDeclarations.GENERIC_WRITE, FileIOApiDeclarations.FILE_SHARE_READ | FileIOApiDeclarations.FILE_SHARE_WRITE, IntPtr.Zero, FileIOApiDeclarations.OPEN_EXISTING, 0, 0); if (fileHandle.IsInvalid) { // Bad handle, try next path continue; } try { HidApiDeclarations.HIDD_ATTRIBUTES hidAttributes = new HidApiDeclarations.HIDD_ATTRIBUTES(); hidAttributes.Size = Marshal.SizeOf(hidAttributes); if (0 != HidApiDeclarations.HidD_GetAttributes(fileHandle, ref hidAttributes) && hidAttributes.VendorID == vid) { // Good attributes and right vid, try to get caps IntPtr pPerparsedData = new IntPtr(); if (HidApiDeclarations.HidD_GetPreparsedData(fileHandle, ref pPerparsedData)) { HidApiDeclarations.HIDP_CAPS hidCaps = new HidApiDeclarations.HIDP_CAPS(); if (0 != HidApiDeclarations.HidP_GetCaps(pPerparsedData, ref hidCaps)) { // Got Capabilities, add device to list byte[] Mstring = new byte[128]; String ssss = "";; if (0 != HidApiDeclarations.HidD_GetManufacturerString(fileHandle, ref Mstring[0], 128)) { for (int i = 0; i < 64; i++) { byte[] t = new byte[2]; t[0] = Mstring[2 * i]; t[1] = Mstring[2 * i + 1]; if (t[0] == 0) { break; } ssss += System.Text.Encoding.Unicode.GetString(t); } } byte[] Pstring = new byte[128]; String psss = ""; if (0 != HidApiDeclarations.HidD_GetProductString(fileHandle, ref Pstring[0], 128)) { // Pstring[0] = 0xa0; Test unicode // Pstring[1] = 0x03; for (int i = 0; i < 64; i++) { byte[] t = new byte[2]; t[0] = Pstring[2 * i]; t[1] = Pstring[2 * i + 1]; if (t[0] == 0) { break; } psss += System.Text.Encoding.Unicode.GetString(t); } // psss=(System.Text.Encoding.Unicode.GetString(Pstring)).Trim(new char[]{' '}); } devices.AddLast(new PIEDevice(path, hidAttributes.VendorID, hidAttributes.ProductID, hidAttributes.VersionNumber, hidCaps.Usage, hidCaps.UsagePage, hidCaps.InputReportByteLength, hidCaps.OutputReportByteLength, ssss, psss)); } } } } catch (Exception) { continue; } finally { fileHandle.Close(); } } PIEDevice[] ret = new PIEDevice[devices.Count]; devices.CopyTo(ret, 0); return(ret); }