using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Modbus;
using Modbus.Device;
using Modbus.Data;
using System.Net;
using System.Net.Sockets;
using System.IO.Ports;
namespace Input_Status
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public const int Port = 502;
        private void timerScan_Tick_1(object sender, EventArgs e)
        {
            try
            {
                byte slaveID = 1;
                ushort startAddress = 0;
                ushort numInputs = ushort.Parse(txtChannelNumber.Text);
                ushort[] inputs = master.ReadInputRegisters(slaveID, startAddress, numInputs);

                for (int i = 0; i < numInputs; i++)
                {
                    points.Rows[i][1] = Convert.ToInt32(inputs[i]);//input the value to data table
                }
            }
            catch (Exception ex)
            {
                btCloseCOM_Click(sender, e);
                MessageBox.Show(ex.Message);
            }
        }
        private SerialPort comPort = new SerialPort();
        IModbusSerialMaster master;
        System.Data.DataTable points = new System.Data.DataTable("Points");
        DataGridTableStyle tableStyle = new DataGridTableStyle();
        private void Form1_Load(object sender, EventArgs e)
        {
            cmbBaud.SelectedIndex = 7;
            cmbDataBit.SelectedIndex = 1;
            cmbParity.SelectedIndex = 0;
            cmbStopBit.SelectedIndex = 0;
            foreach (string s in SerialPort.GetPortNames())
            cmbPort.Items.Add(s);
            cmbPort.SelectedIndex = 0;
            try
            {
                points.Columns.Add(new DataColumn("Channel", typeof(int)));//make a columns
                points.Columns.Add(new DataColumn("Value", typeof(int)));
                dataGrid1.DataSource = points;
                tableStyle.MappingName = "Points";
                dataGrid1.TableStyles.Add(tableStyle);
            }
            catch (Exception ex)
            {
                dataGrid1.TableStyles["Points"].Dispose();
                tableStyle.Dispose();
            }
        }

        private void btOpenCOM_Click_1(object sender, EventArgs e)
        {
            comPort.PortName = cmbPort.Text;
            comPort.BaudRate = int.Parse(cmbBaud.Text);
            comPort.DataBits = int.Parse(cmbDataBit.Text);
            if (cmbParity.Text.Substring(0, 1) == "0")
            {
                comPort.Parity = Parity.None;
            }
            else if (cmbParity.Text.Substring(0, 1) == "1")
            {
                comPort.Parity = Parity.Odd;
            }
            else if (cmbParity.Text.Substring(0, 1) == "2")
            {
                comPort.Parity = Parity.Even;
            }
            if (cmbStopBit.Text == "0")
            {
                comPort.StopBits = StopBits.None;
            }
            else if (cmbStopBit.Text == "1")
            {
                comPort.StopBits = StopBits.One;
            }
            comPort.Open();
            master = ModbusSerialMaster.CreateRtu(comPort);
            master.Transport.Retries = 0;
            master.Transport.ReadTimeout = 200;

            btOpenCOM.Enabled = false;
            btCloseCOM.Enabled = true;
            timerScan.Enabled = true;
            txtChannelNumber.Enabled = false;
            
            ushort numInputs = ushort.Parse(txtChannelNumber.Text);
            for (int i = 0; i < numInputs; i++)
            {
                points.Rows.Add(new object[] { i, 0 });//make a Row;
            }
        }

        private void btCloseCOM_Click(object sender, EventArgs e)
        {
            comPort.Close();
            btOpenCOM.Enabled = true;
            btCloseCOM.Enabled = false;
            timerScan.Enabled = false;
            txtChannelNumber.Enabled = true;
            points.Rows.Clear();//clear row
        }

        private void txtMsg_TextChanged(object sender, EventArgs e)
        {

        }

        private void Form1_Closed(object sender, EventArgs e)
        {
            comPort.Close();
        }
    }
}