using Microsoft.Win32;
using System;
using System.IO.Ports;
using System.Windows.Forms;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
namespace WindowsFormsApp
{
public partial class Form1 : Form
{
//SerialPort sp = null;//声明一个串口类
bool isOpen = false;//打开串口标志位
bool isSetProperty = false;//属性设置标志位
bool isHex = false;//十六进制显示标志位
public Form1()
{
InitializeComponent();
System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;//设置该属性为false
}
//我们在form载入时，扫描识别存在的串口。
private void Form1_Load(object sender, EventArgs e)
{
this.MaximumSize = this.Size;
this.MinimumSize = this.Size;
this.MaximizeBox = false;
RegistryKey keyCom = Registry.LocalMachine.OpenSubKey("Hardware\\DeviceMap\\SerialComm");
if (keyCom != null)
{
string[] sSubKeys = keyCom.GetValueNames();
cbxCOMPort.Items.Clear();
foreach (string sName in sSubKeys)
{
string sValue = (string)keyCom.GetValue(sName);
cbxCOMPort.Items.Add(sValue);
}
if (cbxCOMPort.Items.Count > 0)
cbxCOMPort.SelectedIndex = 0;
else
{
cbxCOMPort.Text = "";
MessageBox.Show("没有找到可用串口！", "错误提示");
}
}
cbxBaudRate.SelectedIndex = 4;
cbxStopBits.SelectedIndex = 1;
cbxDataBits.SelectedIndex = 0;
cbxParity.SelectedIndex = 0;
rbnChar.Checked = true;
}
private void btnCheckCOM_Click(object sender, EventArgs e)//检测哪些串口可用
{
RegistryKey keyCom = Registry.LocalMachine.OpenSubKey("Hardware\\DeviceMap\\SerialComm");
if (keyCom != null)
{
string[] sSubKeys = keyCom.GetValueNames();
cbxCOMPort.Items.Clear();
foreach (string sName in sSubKeys)
{
string sValue = (string)keyCom.GetValue(sName);
cbxCOMPort.Items.Add(sValue);
}
if (cbxCOMPort.Items.Count > 0)
cbxCOMPort.SelectedIndex = 0;
else
{
cbxCOMPort.Text ="";
MessageBox.Show("没有找到可用串口！", "错误提示");
}
}
}
private bool CheckPortSetting()//检查串口是否设置
{
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()//设置串口的属性
{
serialPort.PortName = cbxCOMPort.Text.Trim();//设置串口名
serialPort.BaudRate = Convert.ToInt32(cbxBaudRate.Text.Trim());//设置串口的波特率
float f = Convert.ToSingle(cbxStopBits.Text.Trim());//设置停止位
if (f == 0)
{
serialPort.StopBits = StopBits.None;
}
else if (f == 1.5)
{
serialPort.StopBits = StopBits.OnePointFive;
}
else if (f == 1)
{
serialPort.StopBits = StopBits.One;
}
else if (f == 2)
{
serialPort.StopBits = StopBits.Two;
}
else
{
serialPort.StopBits = StopBits.One;
}
serialPort.DataBits = Convert.ToInt16(cbxDataBits.Text.Trim());//设置数据位
string s = cbxParity.Text.Trim(); //设置奇偶校验位
if (s.CompareTo("无") == 0)
{
serialPort.Parity = Parity.None;
}
else if (s.CompareTo("奇校验") == 0)
{
serialPort.Parity = Parity.Odd;
}
else if (s.CompareTo("偶校验") == 0)
{
serialPort.Parity = Parity.Even;
}
else
{
serialPort.Parity = Parity.None;
}
serialPort.ReadTimeout = -1;//设置超时读取时间
serialPort.RtsEnable = true;
//定义DataReceived 事件，当串口收到数据后触发事件
serialPort.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived);
if (rbnHex.Checked)
{
isHex = true;
}
else
{
isHex = false;
}
}
private void btnOpenCom_Click(object sender, EventArgs e)
{
if (!isOpen)
{
if (!CheckPortSetting())//检测串口设置
{
MessageBox.Show("串口未设置！", "错误提示"); return;
}
if (!isSetProperty)//串口未设置则设置串口
{
SetPortProperty(); isSetProperty = true;
}
try
{
serialPort.Open(); //打开串口
btnOpenCom.Text = "关闭串口";
cbxCOMPort.Enabled = false;//关闭使能
cbxBaudRate.Enabled = false;
cbxStopBits.Enabled = false;
cbxParity.Enabled = false;
cbxDataBits.Enabled = false;
rbnChar.Enabled = false;
rbnHex.Enabled = false;
isOpen = true;
serialPort.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived);//串口接收处理函数
}
catch
{
MessageBox.Show("串口打开失败！");
}
}
else
{
try
{
serialPort.Close(); //关闭串口
btnOpenCom.Text = "打开串口";
cbxCOMPort.Enabled = true;//打开使能
cbxBaudRate.Enabled = true;
isOpen = false;
}
catch
{
MessageBox.Show("串口关闭失败！");
}
}
}
//private void sp_DataReceived(object sender, SerialDataReceivedEventArgs e)
//{
// string str = serialPort.ReadExisting();//字符串方式读
// tbxRecvData.Text = "";//先清除上一次的数据
// tbxRecvData.Text += str;
//}
private void sp_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
System.Threading.Thread.Sleep(100);//延时 100ms 等待接收完数据
//this.Invoke 就是跨线程访问 ui 的方法，也是本文的范例
this.Invoke((EventHandler)(delegate
{
if (isHex == false)
{
tbxRecvData.Text += serialPort.ReadLine();
}
else
{
Byte[] ReceivedData = new Byte[serialPort.BytesToRead]; //创建接收字节数组
serialPort.Read(ReceivedData, 0, ReceivedData.Length); //读取所接收到的数据
String RecvDataText = null;
for (int i = 0; i < ReceivedData.Length - 1; i++)
{
RecvDataText += ("0x" + ReceivedData[i].ToString("X2") + " ");
}
tbxRecvData.Text += RecvDataText;
}
serialPort.DiscardInBuffer();//丢弃接收缓冲区数据
}));
}
private void btnSend_Click(object sender, EventArgs e)
{
//发送数据
if (serialPort.IsOpen)
{//如果串口开启
if (tbxSendData.Text.Trim() != "")//如果框内不为空则
{
serialPort.Write(tbxSendData.Text.Trim());//写数据
}
else
{
MessageBox.Show("发送框没有数据");
}
}
else
{
MessageBox.Show("串口未打开");
}
}
private void btnCleanData_Click(object sender, EventArgs e)
{
tbxRecvData.Text = ""; tbxSendData.Text = "";
}
}
}
打开串口没有提示失败，但是单片机就不运行了。
