using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using XPacNET;
using System.Threading;

namespace ReadTimeTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        [DllImport("mmtimer.dll")]
        static extern uint timeBeginPeriod(uint period);

        [DllImport("mmtimer.dll")]
        static extern uint timeEndPeriod(uint period);

        [DllImport("mmtimer.dll")]
        static extern uint timeSetEvent(uint uDelay, uint uResolution, TimerCallback lpTimeProc, UIntPtr dwUser, uint fuEvent);

        [DllImport("mmtimer.dll")]
        static extern uint timeKillEvent(uint uTimerID);


        public IntPtr hPort;
        public int iSlot, iDOChs;
        public uint uDOValue;

        //bool _bDOEnable;       

        [Flags]
        public enum fuEvent : uint
        {
            TIME_ONESHOT = 0,      //Event occurs once, after uDelay milliseconds.
            TIME_PERIODIC = 1,
            TIME_CALLBACK_FUNCTION = 0x0000,  /* callback is function */
            //TIME_CALLBACK_EVENT_SET = 0x0010, /* callback is event - use SetEvent */
            //TIME_CALLBACK_EVENT_PULSE = 0x0020  /* callback is event - use PulseEvent */
        }

        delegate void TimerCallback(uint uTimerID, uint uMsg, UIntPtr dwUser, UIntPtr dw1, UIntPtr dw2);
        TimerCallback _timeproc;
        bool bled = false;

        void TimeProc_(uint uID, uint uMsg, UIntPtr dwUser, UIntPtr dw1, UIntPtr dw2)
        {
            /*            if (_bDOEnable)
                        {
                            WinPAC.pac_WriteDO(hPort, iSlot, iDOChs, uDOValue);
                            _bDOEnable = false;
                        }
                        else
                        {
                            WinPAC.pac_WriteDO(hPort, iSlot, iDOChs, 0);
                            _bDOEnable = true;
                        }*/
            if (bled)
            {
                //XPacNET.XPac.pac_EnableLED(0, true);
                XPacNET.XPac.pac_WriteDO(hPort, iSlot, iDOChs, uDOValue);
                //XPacNET.XPac.pac_EnableLED(1, false);
                bled = false;
            }
            else
            {
                XPacNET.XPac.pac_WriteDO(hPort, iSlot, iDOChs, 0);
                //XPacNET.XPac.pac_EnableLED(0, false);
                //XPacNET.XPac.pac_EnableLED(1, true);
                bled = true;
            }
        }

        uint uiTimerID;
        private void btntimeSetEvent_Click(object sender, EventArgs e)
        {
            iSlot = Convert.ToInt32(cmbDOSlot.SelectedItem.ToString());
            iDOChs = Convert.ToInt32(txtDOChannels.Text);
            uDOValue = Convert.ToUInt32(txtDOValue.Text, 16);
            hPort = XPacNET.XPac.uart_Open("");

            //Use timeSetEvent to do real time operation
            timeBeginPeriod(1);
            fuEvent f = fuEvent.TIME_PERIODIC;
            _timeproc = TimeProc_;
            uiTimerID = timeSetEvent(1000, 1, _timeproc, UIntPtr.Zero, (uint)f);
        }

        private void btntimeKillEvent_Click(object sender, EventArgs e)
        {
            timeKillEvent(uiTimerID);
            timeEndPeriod(1);
            XPacNET.XPac.uart_Close(hPort);
        }

        [DllImport("XPAC_Utility.dll", EntryPoint = "pac_RegKeyExist")]
        public extern static bool pac_RegKeyExist(string KeyName);

        [DllImport("XPAC_Utility.dll", EntryPoint = "pac_RegCreateKey")]
        public extern static bool pac_RegCreateKey(string KeyName);

        [DllImport("XPAC_Utility.dll", EntryPoint = "pac_RegSetDWORD")]
        public extern static bool pac_RegSetDWORD(string KeyName, uint assignVal);


        private void btnPriority_Click(object sender, EventArgs e)
        {
            /*
		       Set timeSetEvent priority
	        */
            bool ret;
            //Check if key exists
            ret = pac_RegKeyExist("HKEY_LOCAL_MACHINE\\System\\MMTIMER\\");
            if (!ret)
            {
                //Create Key
                ret = pac_RegCreateKey("HKEY_LOCAL_MACHINE\\System\\MMTIMER\\");
                if (!ret) MessageBox.Show("Create registry key fail.(\"HKEY_LOCAL_MACHINE\\System\\MMTIMER\\\")\n");
            }

            //Set priority value
            uint uPriority = Convert.ToUInt32(txtPriority.Text);
            ret = pac_RegSetDWORD("HKEY_LOCAL_MACHINE\\System\\MMTIMER\\Priority256", uPriority);
            if (!ret) MessageBox.Show("Set priority value fail.(pac_RegSetDWORD() function fail)\n");
        }
    }
}