我做的串口调试助手程序运行成功了，可是为什么实现不了功能，发送数据，接收区没有收到
这是程序using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using
namespace 串口调试助手
{
public partial class 串口调试助手 : Form
{
SerialPort sp = null;
bool isOpen = false;
bool isSetProperty = false;
bool isHex = false;
public 串口调试助手()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
this.MaximumSize = this.Size;
this.MinimumSize = this.Size;
this.MaximizeBox = false;
for (int i = 0; i < 10; i++)
{
cbxCOMPort.Items.Add("COM" + (i + 1).ToString());
}
cbxCOMPort.SelectedIndex = 0;
cbxBaudRate.Items.Add("1200");
cbxBaudRate.Items.Add("2400");
cbxBaudRate.Items.Add("4800");
cbxBaudRate.Items.Add("9600");
cbxBaudRate.Items.Add("19200");
cbxBaudRate.Items.Add("38400");
cbxBaudRate.Items.Add("43000");
cbxBaudRate.Items.Add("56000");
cbxBaudRate.Items.Add("57600");
cbxBaudRate.Items.Add("115200");
cbxBaudRate.SelectedIndex = 5;
cbxStopBits.Items.Add("0");
cbxStopBits.Items.Add("1");
cbxStopBits.Items.Add("1.5");
cbxStopBits.Items.Add("2");
cbxStopBits.SelectedIndex = 1;
cbxDataBits.Items.Add("8");
cbxDataBits.Items.Add("7");
cbxDataBits.Items.Add("6");
cbxDataBits.Items.Add("5");
cbxDataBits.SelectedIndex = 0;
cbxParity.Items.Add("无");
cbxParity.Items.Add("奇校验");
cbxParity.Items.Add("偶校验");
cbxParity.SelectedIndex = 0;
rbnChar.Checked = true;
}
private void btnCheckCOM_Click(object sender, EventArgs e)
{
bool comExistence = false;
cbxCOMPort.Items.Clear();
for (int i = 0; i < 10; i++)
{
try
{
SerialPort sp = new SerialPort("COM" + (i + 1).ToString());
sp.Open();
sp.Close();
cbxCOMPort.Items.Add("COM" + (i + 1).ToString());
comExistence = true;
}
catch (Exception)
{
continue;
}
}
if (comExistence)
{
cbxCOMPort.SelectedIndex = 0;
}
else
{
MessageBox.Show("没有找到可用的端口!", "错误提示");
}
}
private bool CheckPortSetting()
{
if (cbxCOMPort.Text.Trim() == "") return false;
if (cbxBaudRate.Text.Trim() == "") return false;
if (cbxDataBits.Text.Trim() == "") return false;
if (cbxParity.Text.Trim() == "") return false;
if (cbxStopBits.Text.Trim() == "") return false;
return true;
}
private bool CheckSendData()
{
if (tbxSendData.Text.Trim() == "") return false;
return true;
}
private void SetPortProperty()
{
sp = new SerialPort();
sp.PortName = cbxCOMPort.Text.Trim();
sp.BaudRate = Convert.ToInt32(cbxBaudRate.Text.Trim());
float f = Convert.ToSingle(cbxStopBits.Text.Trim());
if (f == 0)
{
sp.StopBits = StopBits.None;
}
else if (f == 1.5)
{
sp.StopBits = StopBits.OnePointFive;
}
else if (f == 1)
{
sp.StopBits = StopBits.One;
}
else if (f == 2)
{
sp.StopBits = StopBits.Two;
}
else
{
sp.StopBits = StopBits.One;
}
sp.DataBits = Convert.ToInt16(cbxDataBits.Text.Trim());
string s = cbxParity.Text.Trim();
if (("无") == 0)
{
sp.Parity = Parity.None;
}
else if (("奇校验") == 0)
{
sp.Parity = Parity.Odd;
}
else if (("偶校验") == 0)
{
sp.Parity = Parity.Even;
}
else
{
sp.Parity = Parity.None;
}
sp.ReadTimeout = -1;
sp.RtsEnable = true;
sp.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived);
if (rbnHex.Checked)
{
isHex = true;
}
else
{
isHex = false;
}
}
private void btnSend_Click(object sender, EventArgs e)
{
if (isOpen)
{
try
{
sp.WriteLine(tbxSendData.Text);
}
catch (Exception)
{
MessageBox.Show("发送数据时发生错误!", "错误提示");
return;
}
}
else
{
MessageBox.Show("串口未打开!", "错误提示");
return;
}
}
private void btnOpenCom_Click(object sender, EventArgs e)
{
if (isOpen == false)
{
if (!CheckPortSetting())
{
MessageBox.Show("串口未设置!", "错误提示");
return;
}
if (!isSetProperty)
{
SetPortProperty();
isSetProperty = true;
}
try
{
sp.Open();
isOpen = true;
btnOpenCom.Text = "关闭串口";
cbxCOMPort.Enabled = false;
cbxBaudRate.Enabled = false;
cbxDataBits.Enabled = false;
cbxParity.Enabled = false;
cbxStopBits.Enabled = false;
rbnChar.Enabled = false;
rbnHex.Enabled = false;
}
catch (Exception)
{
isSetProperty = false;
isOpen = false;
MessageBox.Show("串口无效或被占用!", "错误提示");
}
}
else
{
try
{
sp.Close();
isOpen = false;
isSetProperty = false;
btnOpenCom.Text = "打开串口";
cbxCOMPort.Enabled = true;
cbxBaudRate.Enabled = true;
cbxDataBits.Enabled = true;
cbxParity.Enabled = true;
cbxStopBits.Enabled = true;
rbnChar.Enabled = true;
rbnHex.Enabled = true;
}
catch (Exception)
{
btnOpenCom.Text = "关闭串口时出现错误";
}
}
}
private void sp_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
System.Threading.Thread.Sleep(100);
this.Invoke((EventHandler)(delegate
{
if (isHex == false)
{
tbxRecvData.Text += sp.ReadLine();
}
else
{
Byte[] ReceivedData = new Byte[sp.BytesToRead];
sp.Read(ReceivedData, 0, ReceivedData.Length);
String RecvDataText = null;
for (int i = 0; i < ReceivedData.Length - 1; i++)
{
RecvDataText += ("0x" + ReceivedData[i].ToString("X2") + "");
}
tbxRecvData.Text += RecvDataText;
}
sp.DiscardInBuffer();
}));
}
private void btnCleanData_DataClick(object sender, EventArgs e)
{
tbxRecvData.Text = "";
tbxSendData.Text = "";
}
}
}
