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Window1.xaml.cs
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223
Window1.xaml.cs
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using System;
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using System.Collections.Generic;
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using System.IO.Ports;
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using System.Linq;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Threading;
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namespace ConstantCurrentControl
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{
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public partial class Window1 : Window
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{
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private SerialPort _serialPort;
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private bool _isConnected = false;
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public Window1()
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{
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InitializeComponent();
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Loaded += MainWindow_Loaded;
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}
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private void MainWindow_Loaded(object sender, RoutedEventArgs e)
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{
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cmbPort.ItemsSource = SerialPort.GetPortNames();
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if (cmbPort.Items.Count > 0) cmbPort.SelectedIndex = 0;
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}
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#region 串口连接
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private async void BtnConnect_Click(object sender, RoutedEventArgs e)
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{
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if (cmbPort.SelectedItem == null)
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{
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MessageBox.Show("请选择串口号");
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return;
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}
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try
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{
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string port = cmbPort.SelectedItem.ToString();
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int baud = int.Parse((cmbBaudrate.SelectedItem as ComboBoxItem).Content.ToString());
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_serialPort = new SerialPort(port, baud, Parity.None, 8, StopBits.One);
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_serialPort.ReadTimeout = 1000; // 关键：避免永久阻塞
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_serialPort.WriteTimeout = 1000;
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_serialPort.Open();
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_isConnected = true;
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btnConnect.IsEnabled = false;
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btnDisconnect.IsEnabled = true;
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AddLog($"已连接 {port} @ {baud} bps");
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// 发送配置命令（不输出电流，只设置模式），同样异步等待但不死锁
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await ConfigureOptimalMode();
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}
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catch (Exception ex)
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{
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MessageBox.Show($"连接失败: {ex.Message}");
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_isConnected = false;
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}
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}
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private void BtnDisconnect_Click(object sender, RoutedEventArgs e)
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{
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if (_serialPort != null && _serialPort.IsOpen)
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{
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_serialPort.Close();
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_serialPort.Dispose();
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_serialPort = null;
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}
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_isConnected = false;
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btnConnect.IsEnabled = true;
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btnDisconnect.IsEnabled = false;
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AddLog("已断开连接");
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}
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#endregion
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#region 最优模式配置（不发电流，只设 byte6=1, byte8=1）
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private async Task ConfigureOptimalMode()
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{
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// 构造命令：电流 0，但强制 PC 模式和跟踪模式
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byte[] configCmd = new byte[12];
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configCmd[0] = 0xFE;
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configCmd[1] = 0xFE;
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configCmd[2] = 0x55; // 识别码高
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configCmd[3] = 0xAA; // 识别码低
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configCmd[4] = 0x00; // 电流高字节 (0A)
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configCmd[5] = 0x00; // 电流低字节
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configCmd[6] = 0x01; // PC调节模式
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configCmd[7] = 1;
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configCmd[8] = 0; // 开启跟踪模式
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configCmd[9] = 0x00;
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configCmd[10] = 0xFF;
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configCmd[11] = 0xFF;
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await SendCommandSafe(configCmd);
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}
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#endregion
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#region 安全的命令发送（异步读取，不卡UI）
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private async Task<bool> SendCommandSafe(byte[] command)
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{
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if (!_isConnected || _serialPort == null || !_serialPort.IsOpen)
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{
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AddLog("串口未打开");
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return false;
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}
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try
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{
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// 清空缓冲区
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_serialPort.DiscardInBuffer();
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_serialPort.DiscardOutBuffer();
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// 发送命令
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await _serialPort.BaseStream.WriteAsync(command, 0, command.Length);
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AddLog($"发送: {BitConverter.ToString(command)}");
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// 异步读取12字节（带超时）
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byte[] buffer = new byte[12];
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int totalRead = 0;
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DateTime start = DateTime.Now;
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while (totalRead < 12 && (DateTime.Now - start).TotalMilliseconds < 1500)
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{
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if (_serialPort.BytesToRead > 0)
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{
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int read = await _serialPort.BaseStream.ReadAsync(buffer, totalRead, 12 - totalRead);
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if (read > 0) totalRead += read;
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}
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else
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await Task.Delay(20);
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}
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if (totalRead == 12)
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{
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AddLog($"接收: {BitConverter.ToString(buffer)}");
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// 解析回采电流 (byte4, byte5)
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int rawCurrent = (buffer[4] << 8) | buffer[5];
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double actualCurrent = rawCurrent / 1000.0;
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Dispatcher.Invoke(() => txtActualCurrent.Text = actualCurrent.ToString("F3"));
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return true;
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}
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else
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{
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AddLog($"接收超时或字节数不足: {totalRead}/12");
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return false;
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}
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}
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catch (Exception ex)
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{
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AddLog($"命令发送异常: {ex.Message}");
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return false;
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}
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}
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#endregion
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#region 设定电流（平滑可选项，但为了简洁直接发）
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private async void BtnSet_Click(object sender, RoutedEventArgs e)
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{
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if (!_isConnected)
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{
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MessageBox.Show("请先连接串口");
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return;
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}
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if (!double.TryParse(txtSetCurrent.Text, out double target) || target < 0 || target > 5)
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{
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MessageBox.Show("电流需为 0~5.000 A");
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return;
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}
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// 构造12字节电流命令
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int raw = (int)(target * 1000);
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byte cmdH = (byte)((raw >> 8) & 0xFF);
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byte cmdL = (byte)(raw & 0xFF);
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byte[] currentCmd = new byte[12];
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currentCmd[0] = 0xFE;
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currentCmd[1] = 0xFE;
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currentCmd[2] = 0x55;
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currentCmd[3] = 0xAA;
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currentCmd[4] = cmdH;
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currentCmd[5] = cmdL;
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currentCmd[6] = 0x01; // PC模式
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currentCmd[7] = 1;
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currentCmd[8] = 0; // 跟踪
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currentCmd[9] = 0x00;
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currentCmd[10] = 0xFF;
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currentCmd[11] = 0xFF;
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await SendCommandSafe(currentCmd);
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AddLog($"设定电流 = {target:F3} A");
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}
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private async void BtnStop_Click(object sender, RoutedEventArgs e)
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{
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if (!_isConnected) return;
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// 发送电流0
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byte[] stopCmd = new byte[12];
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stopCmd[0] = 0xFE;
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stopCmd[1] = 0xFE;
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stopCmd[2] = 0x55;
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stopCmd[3] = 0xAA;
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stopCmd[4] = 0x00;
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stopCmd[5] = 0x00;
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stopCmd[6] = 0x01;
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stopCmd[7] = 1; // 50Hz
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stopCmd[8] = 0;
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stopCmd[9] = 0x00;
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stopCmd[10] = 0xFF;
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stopCmd[11] = 0xFF;
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await SendCommandSafe(stopCmd);
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AddLog("禁止输出 (0A)");
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}
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private void AddLog(string msg)
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{
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Dispatcher.Invoke(() =>
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{
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lstLog.Items.Insert(0, $"{DateTime.Now:HH:mm:ss} {msg}");
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if (lstLog.Items.Count > 50) lstLog.Items.RemoveAt(lstLog.Items.Count - 1);
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});
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}
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}
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}
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#endregion
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