public static extern Boolean SetupDiGetDeviceInterfaceDetail(IntPtr hDevInfo, SP_DEVICE_INTERFACE_DATA deviceInterfaceData, SP_DEVICE_INTERFACE_DETAIL_DATA deviceInterfaceDetailData, uint deviceInterfaceDetailDataSize, out uint requiredSize, SP_DEVINFO_DATA deviceInfoData);
// <summary>
/// 通过vid，pid获得串口设备号
/// </summary>
/// <param name="vid">vid</param>
/// <param name="pid">pid</param>
/// <returns>串口号</returns>
public string GetPortNameFormVidPid(string vid, string pid)
{
//{4d36e978-e325-11ce-bfc1-08002be10318}
Guid GUID_DEVINTERFACE_DFU = new Guid(0x4d36e978, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18);
Guid classGuid = Guid.Empty;
Guid myGUID = Guid.Empty;
string enumerator = "USB";
IntPtr hDevInfo = Win32.SetupDiGetClassDevs(ref classGuid, IntPtr.Zero, IntPtr.Zero, Win32.DIGCF_DEVICEINTERFACE | Win32.DIGCF_PRESENT);
//if (hDevInfo.ToInt32() == Win32.INVALID_HANDLE_VALUE)
if (false)
{
Console.WriteLine("read hardware information error");
}
else
{
SP_DEVINFO_DATA devInfoData = new SP_DEVINFO_DATA();
devInfoData.cbSize = 32;
devInfoData.classGuid = Guid.Empty;
devInfoData.devInst = 0;
devInfoData.reserved = IntPtr.Zero;
bool result = Win32.SetupDiEnumDeviceInfo(hDevInfo, 0, devInfoData);
if (false == result)
{
int error = Marshal.GetLastWin32Error();
//if (error != Win32.ERROR_NO_MORE_ITEMS)
// throw new Win32Exception(error);
}
SP_DEVICE_INTERFACE_DATA ifData = new SP_DEVICE_INTERFACE_DATA();
ifData.cbSize = (uint)Marshal.SizeOf(ifData);
ifData.Flags = 0;
ifData.InterfaceClassGuid = Guid.Empty;
ifData.Reserved = IntPtr.Zero;
bool result2 = Win32.SetupDiEnumDeviceInterfaces(hDevInfo, IntPtr.Zero, ref classGuid, 0, ifData);
if (result2 == false)
{
int error = Marshal.GetLastWin32Error();
// if (error != Win32.ERROR_NO_MORE_ITEMS)
// throw new Win32Exception(error);
}
uint needed;
// This returns: needed=160, result3=false and error=122 ("The data area passed to a system call is too small")
bool result3 = Win32.SetupDiGetDeviceInterfaceDetail(hDevInfo, ifData, null, 0, out needed, null);
if (result3 == false)
{
int error = Marshal.GetLastWin32Error();
}
// IntPtr detailDataBuffer = IntPtr.Zero;
SP_DEVICE_INTERFACE_DETAIL_DATA ifDetailsData = new SP_DEVICE_INTERFACE_DETAIL_DATA();
ifDetailsData.devicePath = new byte[needed - 4];
ifDetailsData.cbSize = (uint)Marshal.SizeOf(ifDetailsData);
IntPtr detailDataBuffer = Marshal.AllocHGlobal((int)needed);
Marshal.WriteInt32(detailDataBuffer, (IntPtr.Size == 4) ? (4 + Marshal.SystemDefaultCharSize) : 8);
uint nBytes = needed;
bool result4 = Win32.SetupDiGetDeviceInterfaceDetail(hDevInfo, ifData, ifDetailsData, nBytes, out needed, null);
if (result4 == false)
{
int error = Marshal.GetLastWin32Error();
//if (error != Win32.ERROR_NO_MORE_ITEMS)
// throw new Win32Exception(error);
}
IntPtr pDevicePathName = new IntPtr(detailDataBuffer.ToInt32() + 4);
String devicePathName = Marshal.PtrToStringAuto(pDevicePathName);
}
return(null);
}