C# WPF 串口通信
安装依赖库
- System.IO.Ports
csharp
using System.Diagnostics;
using System.IO.Ports;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Markup.Localizer;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace GasAlarmFactoryTools
{
struct TestInfoData {
public string dev_uuid;
public string dev_simcard;
public string private_data;
public string datetime;
};
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
// TODO: 串口相关
SerialPort mSerialPort = new SerialPort();
private Thread recvThread;
long recvTimems = 0; // 用于计算串口接收完一帧数据
int rxLen = 0; // 串口接收到的数据长度
byte[] rxBuff = new byte[128]; // 串口数据接收缓存
private List<string> baudrateList = new List<string> {
"4800",
"9600",
"19200",
"38400",
"57600",
"115200",
"256000",
"1000000",
"2000000",
"3000000"
};
public MainWindow()
{
InitializeComponent();
// 获取所有可用串口端口，并添加到comboBoxCOM
string[] ports = System.IO.Ports.SerialPort.GetPortNames();
comboBoxComName.ItemsSource = ports;
comboBoxComName.SelectedIndex = 0; // 默认选择索引
comboBoxBaudrate.ItemsSource = baudrateList; // 波特率设置combobox数据源
}
/// <summary>
/// 窗口关闭处理
/// </summary>
/// <param name="e"></param>
protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
{
if (MessageBox.Show("确定要退出吗？", "确认", MessageBoxButton.YesNo) != MessageBoxResult.Yes)
{
// 用户选择"否"，取消关闭
e.Cancel = true;
}
mSerialPort.Close();
//mTimer.Dispose();
if (recvThread != null)
{
recvThread.Abort();
}
base.OnClosing(e);
}
private void recvTimerCalback(object obj)
{
this.Dispatcher.Invoke(new Action(() =>
{
// TODO: 处理接收到的数据
}));
}
private void recvThreadTask()
{
Thread.Sleep(200);
try
{
while (true)
{
Thread.Sleep(1);
if (mSerialPort.IsOpen)
{
int datalength = mSerialPort.BytesToRead;
if (datalength >= 1)
{
//Console.WriteLine("BytesToRead:" + datalength);
for (int i = 0; i < datalength; i++)
{
recvTimems = Environment.TickCount; // 更新串口数据接收时间
byte data = (byte)mSerialPort.ReadByte();
rxBuff[rxLen++] = data;
if (rxBuff.Length == rxLen)
{
rxLen = 0;
Array.Clear(rxBuff, 0, rxBuff.Length);
Console.WriteLine("Error================" + rxBuff.Length + "\n");
}
//Console.WriteLine(data.ToString("X2"));
}
}
recvTimerCalback(null);
}
}
}
catch (Exception ex)
{
Console.WriteLine(" ----------异常------------");
}
}
private void btnOpenCloseCom_Click(object sender, RoutedEventArgs e)
{
if (mSerialPort.IsOpen)
{
mSerialPort.Close();
btnOpenCloseCom.Content = "打开串口";
btnOpenCloseCom.Background = Brushes.Red;
Console.WriteLine("关闭串口成功");
Debug.WriteLine("关闭串口成功");
comboBoxComName.IsEnabled = true;
comboBoxBaudrate.IsEnabled = true;
comboBoxDataBits.IsEnabled = true;
comboBoxStopBits.IsEnabled = true;
comboBoxParity.IsEnabled = true;
comboBoxHandshake.IsEnabled = true;
}
else
{
// TODO: 串口默认设置
mSerialPort.BaudRate = 4800; // 波特率
mSerialPort.DataBits = 8; // 数据位
mSerialPort.StopBits = StopBits.One; // 停止位
mSerialPort.Parity = Parity.None; // 校验位
mSerialPort.Handshake = Handshake.None; // 流控位
// mSerialPort.ReadTimeout = 1500; // 读超时
// mSerialPort.Encoding = Encoding.UTF8; // 编码方式
// mSerialPort.RtsEnable = true;
// mSerialPort.DataReceived += SerialPort_DataReceived;
Console.WriteLine("baudrate SelectedIndex:" + comboBoxBaudrate.SelectedIndex);
Console.WriteLine("baudrate SelectedValue:" + comboBoxBaudrate.SelectedValue);
Console.WriteLine("baudrate Text:" + comboBoxBaudrate.Text);
// TODO: 串口端口选择
mSerialPort.PortName = comboBoxComName.SelectedItem.ToString();
// TODO: 设置串口波特率
if (comboBoxBaudrate.SelectedIndex < 0)
{
mSerialPort.BaudRate = Convert.ToInt32(comboBoxBaudrate.Text);
}
else
{
switch (comboBoxBaudrate.SelectedValue)
{
case "4800":
mSerialPort.BaudRate = 4800;
break;
case "9600":
mSerialPort.BaudRate = 9600;
break;
case "19200":
mSerialPort.BaudRate = 19200;
break;
case "38400":
mSerialPort.BaudRate = 38400;
break;
case "57600":
mSerialPort.BaudRate = 57600;
break;
case "115200":
mSerialPort.BaudRate = 115200;
break;
case "256000":
mSerialPort.BaudRate = 256000;
break;
case "1000000":
mSerialPort.BaudRate = 1000000;
break;
case "2000000":
mSerialPort.BaudRate = 2000000;
break;
case "3000000":
mSerialPort.BaudRate = 3000000;
break;
default:
MessageBox.Show("波特率设置有误！");
break;
}
}
// TODO: 串口数据位设置
switch (comboBoxDataBits.SelectedIndex)
{
case 0:
mSerialPort.DataBits = 5;
break;
case 1:
mSerialPort.DataBits = 6;
break;
case 2:
mSerialPort.DataBits = 7;
break;
case 3:
mSerialPort.DataBits = 8;
break;
default:
mSerialPort.DataBits = 8;
break;
}
// TODO: 串口停止位设置
switch (comboBoxStopBits.SelectedIndex)
{
case 0:
mSerialPort.StopBits = StopBits.One;
break;
case 1:
mSerialPort.StopBits = StopBits.OnePointFive;
break;
case 2:
mSerialPort.StopBits = StopBits.Two;
break;
default:
mSerialPort.StopBits = StopBits.One;
break;
}
// TODO: 串口校验位设置
switch (comboBoxParity.SelectedIndex)
{
case 0:
mSerialPort.Parity = Parity.None; // 无校验
Console.WriteLine("无校验");
break;
case 1:
mSerialPort.Parity = Parity.Odd; // 奇校验
Console.WriteLine("奇校验");
break;
case 2:
mSerialPort.Parity = Parity.Even; // 偶校验
Console.WriteLine("偶校验");
break;
case 3:
mSerialPort.Parity = Parity.Mark; // 校验位1
Console.WriteLine("校验位1");
break;
case 4:
mSerialPort.Parity = Parity.Space; // 校验位0
Console.WriteLine("校验位0");
break;
default:
mSerialPort.Parity = Parity.None; // 无校验
break;
}
// TODO: 串口流控位设置
switch (comboBoxHandshake.SelectedIndex)
{
case 0:
mSerialPort.Handshake = Handshake.None;
break;
case 1:
mSerialPort.Handshake = Handshake.XOnXOff;
break;
case 2:
mSerialPort.Handshake = Handshake.RequestToSend;
break;
case 3:
mSerialPort.Handshake = Handshake.RequestToSendXOnXOff;
break;
default:
mSerialPort.Handshake = Handshake.None;
break;
}
// TODO: 尝试打开串口
try
{
mSerialPort.Open();
btnOpenCloseCom.Content = "关闭串口";
btnOpenCloseCom.Background = Brushes.Green;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
}
}
}
}
csharp
// TODO: 串口写入数据 3个参数(buf, offset, len);
mSerialPort.Write(new byte[] { 0xAA, 0x00, 0x08, 0x00, 0xB2, 0x55 }, 0, 6);