using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using AIOWDMNet;  // the namespace exposes the AIOWDM Class interface 

namespace DIO
{
    public partial class Form1 : Form
    {
        // One and only Device Index:
        UInt32 Status = 0; 
        public UInt32 DeviceIndex = AIOWDM.diFirst;
        Int32 NumCards = 0;
        const UInt32 MAX_CARDS = 10;	    
        UInt32 Address;			// This the result of findcards and the address used
	    bool RunFlag;
        public bool TimerEnabled = false;
        
        public ushort[] value = new ushort[] { 0, 0, 0 };
        public int i = 0;

        public struct TCardData 
	    {
		    public bool IsValid;
            public bool IsSelected;
            public UInt32 DeviceID;
            public UInt32 Base;
	    };

        public TCardData[] CardData = new TCardData[MAX_CARDS]; // only set up for 10 max here	

        // Interval Timer fou GUI update:
        // (Note: A Windows Forms timer designed for single threaded environments not a System Timer 55 ms min res)
        static System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();


        public Form1()
        {
            InitializeComponent();

            // Initialize default values:
            DeviceIndex = AIOWDM.diFirst;   // Default to first device found 

            // Ping the driver AIOWDM.SYS:
            if (AIOWDM.InPortB(0x61) == 0xAA55)
            {
                MessageBox.Show(" AIOWDM.SYS not detected.\n Please copy AIOWDM.SYS into [Windows]/system32/drivers and re-run this sample.\n Ensure that a board is installed properly.", "Warning");
            }
            
            // Check device info:
            Int32 iNumCards = AIOWDM.GetNumCards();

            FindCardsWDM();

            textBoxStatus.Text = "This sample outputs a walking bit on Port A of the selected group. It then reads back the value from Port A.  This should be identical to the output value due to on-chip readback. It also displays the Input from Port B. If a wrap plug is installed, Port B should read the same value. Otherwise, ground individual bits on Port B to see them show zeroes on the display.";


            // Add the event and the event handler for the method that will 
            // process the timer event to the timer:
            myTimer.Tick += new EventHandler(TimerEventProcessor);

            // Set the timer interval in miliseconds and start 55ms min resolution:
            myTimer.Interval = 100;
            //myTimer.Start(); // not yet

        }
        
        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void FindCardsWDM()
        {
	        bool found = false;
	        char[] AddStr = new char[256];
	
	        // Vars for QueryCardInfo() :
	        UInt32 CardNum;
            UInt32 DeviceID, Base;
            UInt32 NameSize;
            UInt16[] Name = new UInt16[256];
	        String strname;

	        // Init:
            RunFlag = true;
	        NumCards = 0;
	        int DataIndex = 0;
	
	        // Set CardData to 0 as needed max 10:
            for(int count = 0; count < MAX_CARDS; count++) 
	        {
              CardData[count].IsValid = false;
              CardData[count].IsSelected = false;
              CardData[count].DeviceID = 0;
              CardData[count].Base = 0;	  		
	        };
   	
	        // Get the total number of cards installed:
            NumCards = AIOWDM.GetNumCards();
	
	        if (NumCards == 0) // no cards present
	        {
                labelCardName.Text = "No Card Found";

                textBoxStatus.Text = "No cards were found!";
                textBoxStatus.Text += "This may mean the card is not installed. ";
                textBoxStatus.Text += "Check Device Manager for a card and its status";
                textBoxStatus.Text += "You may consider rebooting your system.";
                comboBoxPort.Enabled = false;

		        RunFlag = false;
	        }
	        else 
	        {
		        // Loop through the cards and validate and store card data:
		        for (CardNum = 0; CardNum != NumCards; CardNum++) 
		        {			
			        NameSize = 256;
                    Status = AIOWDM.QueryCardInfo(CardNum, out DeviceID, out Base, out NameSize, out strname);

			        // Populate list box with addresses found set flags:
			        switch (DeviceID) 
			        {	  
				         // Will only cover PCIe-DIO-24 family in this sample:
				         case 0x0C52:
                            labelCardName.Text = "PCIe-DIO-24 Parallel Digital I/O Card";
                            strname = String.Format("Port 0: {0,4:X}", Base & 0xFFF8);
                            comboBoxPort.Text = strname;
					        if(CardNum <= MAX_CARDS)
					        {
						        CardData[DataIndex].IsValid = true;
						        CardData[DataIndex].DeviceID = DeviceID;
						        CardData[DataIndex].Base = Base;
						        DataIndex++;
					        }
					        found = true;
					        break;
				         case 0x0E53:
                            labelCardName.Text = "PCIe-DIO-24S Parallel Digital I/O Card";                            
                            strname = String.Format("Port 0: {0,4:X}", Base & 0xFFF8);
                            comboBoxPort.Text = strname;
					        if(CardNum <= MAX_CARDS)
					        {
						        CardData[DataIndex].IsValid = true;
						        CardData[DataIndex].DeviceID = DeviceID;
						        CardData[DataIndex].Base = Base;
						        DataIndex++;
					        }
					        found = true;
					        break;
				         case 0x0C53:
                            labelCardName.Text = "PCIe-DIO-24D Parallel Digital I/O Card";
                            strname = String.Format("Port 0: {0,4:X}", Base & 0xFFF8);
                            comboBoxPort.Text = strname;
					        if(CardNum <= MAX_CARDS)
					        {
						        CardData[DataIndex].IsValid = true;
						        CardData[DataIndex].DeviceID = DeviceID;
						        CardData[DataIndex].Base = Base;
						        DataIndex++;
					        }
					        found = true;
					        break;
				         case 0x0E55:
                            labelCardName.Text = "PCIe-DIO-24DC Parallel Digital I/O Card w/Counter";
                            strname = String.Format("Port 0: {0,4:X}", Base & 0xFFF8);
                            comboBoxPort.Text = strname;
					        if(CardNum <= MAX_CARDS)
					        {
						        CardData[DataIndex].IsValid = true;
						        CardData[DataIndex].DeviceID = DeviceID;
						        CardData[DataIndex].Base = Base;
						        DataIndex++;
					        }
					        found = true;
					        break;
				         case 0x0E54:
                            labelCardName.Text = "PCIe-DIO-24DS Parallel Digital I/O Card";
                            strname = String.Format("Port 0: {0,4:X}", Base & 0xFFF8);
                            comboBoxPort.Text = strname;;
					        if(CardNum <= MAX_CARDS)
					        {
						        CardData[DataIndex].IsValid = true;
						        CardData[DataIndex].DeviceID = DeviceID;
						        CardData[DataIndex].Base = Base;
						        DataIndex++;
					        }
					        found = true;
					        break;
				         case 0x0E56:
                            labelCardName.Text = "PCIe-DIO-24DCS Parallel Digital I/O Card w/Counter";
                            strname = String.Format("Port 0: {0,4:X}", Base & 0xFFF8);
                            comboBoxPort.Text = strname;
					        if(CardNum <= MAX_CARDS)
					        {
						        CardData[DataIndex].IsValid = true;
						        CardData[DataIndex].DeviceID = DeviceID;
						        CardData[DataIndex].Base = Base;
						        DataIndex++;
					        }
					        found = true;
                            break;
 
                        default:
					        break;
			        }			

		        }// end loop on validate present cards
	        }//end else card present

	        // If card(s) are present but no valid cards were found:
	        if ((NumCards != 0) && (found == false) ) 
	        {
                labelCardName.Text = "No Valid Card Found.";

                textBoxStatus.Text = "No valid card was found!";
                textBoxStatus.Text += "This may mean the card is not installed. ";
                textBoxStatus.Text += "Check Device Manager for a card and its status";
                textBoxStatus.Text += "You may consider rebooting your system.";
                comboBoxPort.Enabled = false;

		        RunFlag = false;
	        }


            //comboBoxPort.SelectedIndex = 0;
            //m_AddressCombo.SetCurSel(0);
           
            if (RunFlag) 
            {
              //UpdateData(true);
	  
	          // This is the result setting the active address to be used:	  
	          Address = CardData[0].Base;  //default to fist valid
	          CardData[0].IsSelected = true;
            }
        }
        
        private void TimerEventProcessor(Object myObject, EventArgs myEventArgs)
        {
            // This is the method that runs when the timer event is raised:
            myTimer.Stop();

            UpdateGUIState();

            myTimer.Enabled = true;
        }

        private void UpdateGUIState()
        {
            // Get data from board update display states:
	        int j;
	        char[] msg = new char[] {'0','0','0','0','0','0','0','0'};
            StringBuilder s2 = new StringBuilder();
            StringBuilder s3 = new StringBuilder();
            StringBuilder s4 = new StringBuilder();

	        value[0] = (ushort)(1 << i++);
	        AIOWDM.OutPortB(Address, value[0]); // Driver Calls
            value[1] = AIOWDM.InPortB(Address);
            value[2] = AIOWDM.InPortB(Address + 1);
	        i %= 8;
	        for (j=0; j<8; j++)
            {
                if( ((int)value[0] & (int)(1 << j)) != 0 )
                {
                    msg[7-j] = '1';
                }
                else
                {
                    msg[7-j] = '0';
                }
            }
            s2.Insert(0, msg);
            textBoxOutputA.Text = s2.ToString();

	        for (j=0; j<8; j++)
            {
                if (((int)value[1] & (int)(1 << j)) != 0)
                {
                    msg[7 - j] = '1';
                }
                else
                {
                    msg[7 - j] = '0';
                }
            }
            s3.Insert(0, msg);
            textBoxInputA.Text = s3.ToString();

            for (j = 0; j < 8; j++)
            {
                if (((int)value[2] & (int)(1 << j)) != 0)
                {
                    msg[7 - j] = '1';
                }
                else
                {
                    msg[7 - j] = '0';
                }
            }
            s4.Insert(0, msg);
            textBoxInputB.Text = s4.ToString();

        }

        private void comboBoxPort_SelectedIndexChanged(object sender, EventArgs e)
        {
            
            String SelStr;
            SelStr = comboBoxPort.GetItemText(comboBoxPort.SelectedIndex);

            // Select and set new address data:
            if (CardData[comboBoxPort.SelectedIndex].IsValid == true)
            {
                Address = CardData[comboBoxPort.SelectedIndex].Base;

                // Deselect all data and set new selected data:
                for (int count = 0; count < MAX_CARDS; count++)
                {
                    CardData[count].IsSelected = false;
                }
                CardData[comboBoxPort.SelectedIndex].IsSelected = true;
            }

            textBoxStatus.Text += "New Port Selected: ";
            textBoxStatus.Text += SelStr;

            comboBoxPort.SelectedText = SelStr;
        }
        
        private void btnPerformIO_Click(object sender, EventArgs e)
        {
            if (TimerEnabled)
	        {
		        TimerEnabled = false;
                myTimer.Stop();
                btnPerformIO.Text = "Perform I/O";
	        }
	        else
	        {
		        TimerEnabled = true;
                AIOWDM.OutPortB(Address + 3, 0x82); // Driver call
                myTimer.Enabled = true;
                btnPerformIO.Text = "Stop I/O";
	        }
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            // Right now this is only called on button click not window close ALtF4 etc:

            // Kill the timer:
            myTimer.Stop();
            myTimer.Enabled = false;
            myTimer.Dispose();

            // Close the form and Application:
            this.Close();
        }



    }
}