实例介绍
【实例简介】
【实例截图】
【核心代码】
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
namespace ModbusTestClient
{
public partial class FormMainScreen : Form
{
private static int _rowHeightOffset = 2;
private static int _columnWidthOffset = 3;
private System.UInt16[] _registerData = new System.UInt16[65600];
private byte[] _messageReceived = new byte[8];
private int _startRegister = 0;
private byte _slaveAddress = 0;
private int _slaveDelay = 0;
public FormMainScreen()
{
InitializeComponent();
prepareTable();
fillPortList();
}
private void button1_Click(object sender, EventArgs e)
{
//dataGridView1.Rows.Add();
}
private void prepareTable()
{
for (int i = 0; i < 15; i )
{
if (i < 14) dataGridViewRegisters.Rows.Add();
dataGridViewRegisters.Rows[i].Cells[0].Value = i.ToString() " (0x" i.ToString("X") ")";
dataGridViewRegisters.Rows[i].Cells[1].Value = 0;
}
dataGridViewRegisters.Width = dataGridViewRegisters.Columns[0].Width dataGridViewRegisters.Columns[1].Width _columnWidthOffset;
dataGridViewRegisters.Height = (dataGridViewRegisters.Rows.Count 1) * dataGridViewRegisters.Rows[0].Height _rowHeightOffset;
}
private void shiftTable()
{
for (int i = 0; i < 15; i )
{
dataGridViewRegisters.Rows[i].Cells[0].Value = (i _startRegister).ToString() " (0x" (i _startRegister).ToString("X") ")";
}
}
private void dataGridViewRegisters_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{
if (e.ColumnIndex == 1)
{
try
{
System.UInt16 tempUint = 0;
tempUint = Convert.ToUInt16(e.FormattedValue);
_registerData[_startRegister e.RowIndex] = tempUint;
}
catch (Exception ex)
{
System.Console.WriteLine(ex.ToString());
dataGridViewRegisters.Rows[e.RowIndex].ErrorText = "Input is not a valid 16 bit number";
dataGridViewRegisters.Rows[e.RowIndex].Cells[1].Value = 0;
}
}
}
private void buttonGoToRegister_Click(object sender, EventArgs e)
{
int tempInt = 0;
try
{
tempInt = Convert.ToInt32(textBoxRegisterStart.Text);
_startRegister = tempInt;
shiftTable();
}
catch (Exception ex)
{
System.Console.WriteLine(ex.ToString());
textBoxRegisterStart.Text = "0";
}
}
private void fillPortList()
{
foreach (String port in SerialPort.GetPortNames())
{
comboBoxSerialPorts.Items.Add(port);
}
comboBoxSerialPorts.SelectedIndex = 0;
}
private void textBoxSlaveDelay_Validating(object sender, CancelEventArgs e)
{
int tempInt = 0;
try
{
tempInt = Convert.ToInt32(textBoxSlaveDelay.Text);
if (tempInt < 0)
{
tempInt = 0;
textBoxSlaveDelay.Text = "0";
}
_slaveDelay = tempInt;
}
catch (Exception ex)
{
System.Console.WriteLine(ex.ToString());
textBoxSlaveDelay.Text = "0";
}
}
private void textBoxSlaveAddress_Validating(object sender, CancelEventArgs e)
{
int tempInt = 0;
byte tempByte = 0;
try
{
tempInt = Convert.ToInt32(textBoxSlaveAddress.Text);
if (tempInt > 255)
{
tempInt = 255;
textBoxSlaveAddress.Text = "255";
}
tempByte = Convert.ToByte(tempInt);
_slaveAddress = tempByte;
}
catch (Exception ex)
{
System.Console.WriteLine(ex.ToString());
textBoxSlaveAddress.Text = "1";
}
}
private void radioButtonOn_CheckedChanged(object sender, EventArgs e)
{
if (radioButtonOn.Checked)
{
groupBoxConnParameters.Enabled = false;
_serialPort.PortName = Convert.ToString(comboBoxSerialPorts.SelectedItem);
if (radioButtonParityEven.Checked)
_serialPort.Parity = Parity.Even;
else if (radioButtonParityNone.Checked)
_serialPort.Parity = Parity.None;
else if (radioButtonParityOdd.Checked)
_serialPort.Parity = Parity.Odd;
if (radioButtonDataBits7.Checked)
_serialPort.DataBits = 7;
else if (radioButtonDataBits8.Checked)
_serialPort.DataBits = 8;
if (radioButtonStopBit1.Checked)
_serialPort.StopBits = StopBits.One;
if (radioButtonStopBit2.Checked)
_serialPort.StopBits = StopBits.Two;
_serialPort.BaudRate = Convert.ToInt32(textBoxBaud.Text);
try
{
_serialPort.Open();
backgroundWorker1.RunWorkerAsync();
}
catch (Exception ex)
{
radioButtonOff.Checked = true;
}
}
else
{
backgroundWorker1.CancelAsync();
groupBoxConnParameters.Enabled = true;
}
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = sender as BackgroundWorker;
while (!worker.CancellationPending)
{
int aa = _serialPort.BytesToRead;
if (_serialPort.BytesToRead == 8)
{
_serialPort.Read(_messageReceived, 0, 8);
addLog(createLogStr(ref _messageReceived), LogType.RX, worker);
if (_messageReceived[0] == _slaveAddress && _messageReceived[1] == 3)
{
if (CRCStuff.checkCRC(ref _messageReceived, 8))
{
byte[] messageToSend = createRespondMessage();
System.Threading.Thread.Sleep(_slaveDelay);
_serialPort.Write(messageToSend, 0, messageToSend.Length);
addLog(createLogStr(ref messageToSend), LogType.TX, worker);
}
else
{
addLog("", LogType.CRC_ERR, worker);
}
}
}
else
{
_serialPort.DiscardInBuffer();
}
}
_serialPort.Close();
e.Cancel = true;
}
private byte[] createRespondMessage()
{
int numberOfPoints = 0;
int bytesToSend = 0;
int startAddress = 0;
numberOfPoints = (_messageReceived[4] << 8) | _messageReceived[5];
bytesToSend = 5 * numberOfPoints 2;
byte[] respondMessage = new byte[bytesToSend];
respondMessage[0] = _slaveAddress;
respondMessage[1] = 3;
respondMessage[2] = Convert.ToByte(2 * numberOfPoints);
startAddress = (_messageReceived[2] << 8) | _messageReceived[3];
int j = 0;
for (int i = 0; i < numberOfPoints; i )
{
respondMessage[i j 3] = Convert.ToByte((_registerData[startAddress i] >> 8) & 0xff);
respondMessage[i j 4] = Convert.ToByte(_registerData[startAddress i] & 0xff);
j ;
}
byte[] crcCalculation = CRCStuff.calculateCRC(ref respondMessage, bytesToSend - 2);
respondMessage[bytesToSend - 2] = crcCalculation[0];
respondMessage[bytesToSend - 1] = crcCalculation[1];
return respondMessage;
}
private void addLog(String log, LogType logType, BackgroundWorker worker)
{
DateTime now = DateTime.Now;
String tmpStr = "";
switch (logType)
{
case LogType.CRC_ERR:
tmpStr = ">" now.ToLongTimeString() ">CRC Check Failed";
break;
case LogType.RX:
tmpStr = ">" now.ToLongTimeString() ">RX:" log;
break;
case LogType.TX:
tmpStr = ">" now.ToLongTimeString() ">TX:" log;
break;
}
worker.ReportProgress(0, tmpStr);
}
private String createLogStr(ref byte[] message)
{
String tmpStr = "";
foreach (byte oneByte in message)
{
String byteString = oneByte.ToString("X");
if (byteString.Length == 1)
byteString = "0" byteString;
tmpStr = tmpStr byteString " ";
}
return tmpStr;
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
listBoxCommLog.Items.Add(e.UserState);
}
enum LogType
{
RX,
TX,
CRC_ERR
}
}
}
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