实例介绍
【实例简介】设定连续读取时间后，从COM口获取超声波传感器传来的数据，并把数据写入文本文件，以便3后续分析使用
【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;
using System.Threading;
using System.IO;
namespace CommTest2
{
public partial class Form1 : Form
{
SerialPort MSComm1 = new SerialPort();
string GetTxt = "";
Int32 rTextNum = 0;
Int32 SendCount = 0;
Int32 GetCount = 0;
Int32 ErrCount = 0;
Int32 SendLen = 0;
Int32 SendTime = 0;
Int32 Allsum = 0;
Int32 CloseCount = 0;
Byte[] arr_command = new Byte[0];
Queue<byte> QU = new Queue<byte>(480);
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string[] ports = System.IO.Ports.SerialPort.GetPortNames();
MSComm1.ReadTimeout = 32;
timer_send.Enabled = false;
SendLen = Convert.ToInt32(TextBox3.Text);
int i = 0;
foreach (string port in ports)
{
ComboBox1.Items.Add(port);
i ;
}
if (i > 0)
{
ComboBox1.SelectedIndex = 0;
if (MSComm1.IsOpen)
{
MSComm1.Close();
}
}
}
private void Button4_Click(object sender, EventArgs e)
{
if (RadioButton3.Checked)
{
open_232();
GetTxt = "";
timer2.Enabled = true;
发送一组数();
}
else
{
open_232();
发送一组数();
}
}
private void open_232()
{
if (this.Button4.Text == "打开串口")
{
try
{
SendLen = Convert.ToInt32(TextBox3.Text);
SendTime = Convert.ToInt32(TextBox1.Text);
if (SendLen > 254) SendLen = 2;
if (SendTime <= 1) SendTime = 1;
Allsum = 0;
Array.Resize(ref arr_command, 1);
arr_command[0] = (byte)(85);
timer_send.Interval = SendTime;
timer_send.Enabled = true;
MSComm1.ReadTimeout = 200;
//MSComm1.DiscardOutBuffer();
MSComm1.PortName = ComboBox1.Text;
MSComm1.BaudRate = Convert.ToInt32(ComboBox2.Text);
MSComm1.Parity = Parity.None;
MSComm1.StopBits = StopBits.One;
this.MSComm1.DataReceived = new System.IO.Ports.SerialDataReceivedEventHandler(this.MSComm1_DataReceived);
MSComm1.Open();
this.Button4.Text = "关闭串口";
}
catch
{
MessageBox.Show("串口操作失败");
}
}
else
{
try
{
MSComm1.Close();
this.Button4.Text = "打开串口";
timer_send.Enabled = false;
}
catch
{
MessageBox.Show("串口操作失败");
}
}
}
private void MSComm1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
try
{
if (this.RadioButton2.Checked || RadioButton3.Checked)
{
int outLen = MSComm1.BytesToRead;
byte[] AA = new byte[outLen];
MSComm1.Read(AA, 0, outLen);
for (int i = 0; i < outLen; i )
{
QU.Enqueue(AA[i]);
}
}
}
catch
{
throw;
}
}
private void 发送一组数()
{
try
{
if (MSComm1.IsOpen)
{
MSComm1.Write(arr_command, 0, 1);
//String str_in = "";
//for (int i = 0; i < SendLen; i )
//{
// str_in = (arr_command[i].ToString("X2").PadLeft(2, '0').PadRight(3, ' '));
//}
//RichTextBox1.Text = "发送：" str_in "\r\n" RichTextBox1.Text;
}
else
{
// RichTextBox1.Text = "请打开串口先!" "\r\n" RichTextBox1.Text;
}
}
catch
{
}
}
private void timer1_Tick(object sender, EventArgs e)
{
try
{
if (QU.Count >= SendLen)
{
byte upData = 0;
string tempStr = "";
bool IsErr = false;
System.Text.ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding();
byte[] byteArray = new byte[2];
byte tempB = QU.Dequeue();
byteArray[0] = tempB ;
tempB = QU.Dequeue();
byteArray[1] = tempB;
for (int i = 0; i < 2; i )
{
tempStr = (byteArray[i].ToString("X2").PadLeft(2, '0').PadRight(3, ' '));
}
发送一组数();
GetTxt = tempStr "\r\n";
RichTextBox1.Text = tempStr "\r\n" RichTextBox1.Text;
rTextNum = rTextNum 1;
if (rTextNum > 100)
{
RichTextBox1.Text = "";
rTextNum = 0;
}
if (IsErr)
{
ErrCount ;
ToolLabel4.Text = "误码次数：" ErrCount.ToString() "次";
WriteError(tempStr);
}
GetCount = SendLen;
ToolLabel3.Text = "接收字节：" GetCount.ToString() "Byte";
rTextNum = rTextNum 1;
if (rTextNum > 200)
{
RichTextBox1.Text = "";
rTextNum = 0;
}
}
}
catch
{
}
}
/// <summary>
/// 写入错误日志
/// </summary>
/// <param name="txt"></param>
public static void WriteError(string txt)
{
try
{
string datatxt = DateTime.Now.Year.ToString() "-" DateTime.Now.Month.ToString() "-" DateTime.Now.Day.ToString();
StreamWriter sw;
if (File.Exists("LOG/" datatxt ".txt") == true)
{
sw = File.AppendText("LOG/" datatxt ".txt");
}
else
{
sw = File.CreateText("LOG/" datatxt ".txt");
}
sw.WriteLine(DateTime.Now " " txt);
sw.Close();
sw.Dispose();
}
catch { }
}
public static void WriteTxt(string txt)
{
try
{
string datatxt = DateTime.Now.Month.ToString() "_" DateTime.Now.Day.ToString() DateTime.Now.Hour.ToString() DateTime.Now.Minute.ToString() DateTime.Now.Second.ToString();
StreamWriter sw;
if (File.Exists("LOG/" datatxt ".txt") == true)
{
sw = File.AppendText("LOG/" datatxt ".txt");
}
else
{
sw = File.CreateText("LOG/" datatxt ".txt");
}
sw.WriteLine(txt);
sw.Close();
sw.Dispose();
}
catch { }
}
private void Button1_Click(object sender, EventArgs e)
{
GetCount = 0;
SendCount = 0;
ErrCount = 0;
QU.Clear();
ToolLabel3.Text = "接收次数：" GetCount.ToString() "次";
ToolLabel4.Text = "误码次数：" ErrCount.ToString() "次";
ToolLabel2.Text = "发送次数：" SendCount.ToString() "次";
}
private void Tim_232_sta_Tick(object sender, EventArgs e)
{
if (MSComm1.IsOpen)
{
ToolLabel1.Text = "串口状态：开";
}
else
{
ToolLabel1.Text = "串口状态：关";
}
}
private void timer_send_Tick(object sender, EventArgs e)
{
try
{
if (this.RadioButton1.Checked )
{
// 发送一组数();
rTextNum = rTextNum 1;
SendCount = SendCount 1;
ToolLabel2.Text = "发送次数：" SendCount.ToString() "次";
if (rTextNum > 200)
{
RichTextBox1.Text = "";
rTextNum = 0;
}
}
}
catch
{
}
}
private void timer2_Tick(object sender, EventArgs e)
{
CloseCount ;
Int32 MaxCount = Convert.ToInt32(textBox2.Text) ;
if (CloseCount > MaxCount)
{
CloseCount = 0;
MSComm1.Close();
this.Button4.Text = "打开串口";
timer_send.Enabled = false;
timer2.Enabled = false;
WriteTxt(GetTxt);
GetTxt = "";
}
}
}
}
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