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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Globalization;
using System.Security;

namespace USBBulkExample
{
    class Program
    {
        [DllImport("lmusbdll.dll", EntryPoint = "InitializeDevice",
        ExactSpelling = true, CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
        public static extern IntPtr InitializeDevice(ushort usVID,
                                        ushort usPID,
                                         ref System.Guid lpGUID,
                                         ref bool pbDriverInstalled);

        [DllImport("lmusbdll.dll", EntryPoint = "ReadUSBPacket",
        ExactSpelling = true, CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
        public static extern UInt32 ReadUSBPacket(IntPtr hHandle,
                             [In] char[] pcBuffer,
                             UInt32 ulSize,
                             ref UInt32 pulRead,
                             UInt32 ulTimeoutMs,
                             IntPtr hBreak);

        [DllImport("lmusbdll.dll", EntryPoint = "WriteUSBPacket",
        ExactSpelling = true, CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
        public static extern bool WriteUSBPacket(IntPtr hHandle,
                              [Out] char[] pcBuffer,
                              UInt32 ulSize,
                              ref UInt32 pulWritten);

        [DllImport("lmusbdll.dll", EntryPoint = "TerminateDevice",
        ExactSpelling = true, CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
        public static extern bool TerminateDevice(IntPtr hHandle);

        static void Main(string[] args)
        {
            UInt32 dwError;
            char[] szBuffer = new char[256];
            const UInt32 INFINITE = 0xFFFFFFFF;
            ushort BULK_VID = 0x1cbe;
            ushort BULK_PID = 0x0003;
            bool bDriverInstalled = false;
            UInt32 ulRead = 0;
            UInt32 pulWritten = 0;
            IntPtr hBreak = IntPtr.Zero;
            IntPtr hUSB = IntPtr.Zero;

            // Create a GUID, match to what is in INF file
            System.Guid GUID_DEVINTERFACE_LUMINARY_BULK;
            GUID_DEVINTERFACE_LUMINARY_BULK = new System.Guid("{273FD48E-C23F-4d4b-B48B-5E5CAA3B3D99}");

            // Init the USB device
            hUSB = InitializeDevice(BULK_VID, BULK_PID,
                                    ref GUID_DEVINTERFACE_LUMINARY_BULK,
                                    ref bDriverInstalled);
            
            // Load up array with useless "t"
            int x;
            for (x = 0; x <>256; x++)
            {
                szBuffer[x] = Convert.ToChar("t");
            }

            // do this transaction 10k times for the fun of it...
            int y;
            for (y = 0; y <>10000; y++)
            {
                bool ret = WriteUSBPacket(hUSB, szBuffer, 255, ref pulWritten);
                dwError = ReadUSBPacket(hUSB, szBuffer, 255, ref ulRead,
                                        INFINITE, hBreak);
            }

            // Close the connection
            bool ret1 = TerminateDevice(hUSB);
        }
    }
}