115 lines
3.5 KiB
C#
115 lines
3.5 KiB
C#
using Model.Models;
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using Prism.Events;
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using System;
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using System.Text;
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using UIShare.PubEvent;
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using ZLGUSBCANFD;
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namespace UIShare.GlobalVariable
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{
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/// <summary>
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/// CAN 信号广播器：订阅 ZLGCANFD.OnDbcMessageDecoded 事件，
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/// 将解码后的 DBC 信号值通过 HardwareDataReportedEvent 广播给监控系统。
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/// 由 DeviceManager 创建和管理，生命周期与 CAN 设备绑定。
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/// </summary>
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public class CANSignalBroadcaster : IDisposable
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{
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private readonly IEventAggregator _eventAggregator;
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private readonly string _scopeName;
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private ZLGCANFD? _canfd;
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private bool _disposed;
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public CANSignalBroadcaster(IEventAggregator eventAggregator, string scopeName)
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{
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_eventAggregator = eventAggregator;
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_scopeName = scopeName;
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}
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/// <summary>
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/// 绑定 CANFD 实例并订阅解码事件。
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/// </summary>
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public void Bind(ZLGCANFD canfd)
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{
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Unbind();
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_canfd = canfd;
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_canfd.OnDbcMessageDecoded += OnDbcMessageDecoded;
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}
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/// <summary>
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/// 取消订阅。
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/// </summary>
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public void Unbind()
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{
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if (_canfd != null)
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{
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_canfd.OnDbcMessageDecoded -= OnDbcMessageDecoded;
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_canfd = null;
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}
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}
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/// <summary>
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/// DBC 解码回调：提取所有信号并广播。
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/// </summary>
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private void OnDbcMessageDecoded(uint channel, ZDBC.DBCMessage msg)
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{
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if (_disposed) return;
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string fingerprint = $"CAN:{channel}";
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var now = DateTime.Now;
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for (int i = 0; i < msg.nSignalCount; i++)
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{
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var signal = msg.vSignals[i];
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string signalName = Encoding.Default.GetString(signal.strName).TrimEnd('\0');
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if (string.IsNullOrEmpty(signalName)) continue;
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// 计算物理值：physical = raw * factor + offset
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double physicalValue = signal.nRawvalue * signal.nFactor + signal.nOffset;
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// MethodName 格式："{MessageId:X}.{SignalName}"
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string methodName = $"{msg.nID:X}.{signalName}";
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_eventAggregator.GetEvent<HardwareDataReportedEvent>().Publish(new HardwareReportArgs
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{
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Scope = _scopeName,
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HardwareFingerprint = fingerprint,
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MethodName = methodName,
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Value = physicalValue,
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Time = now
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});
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}
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}
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/// <summary>
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/// 生成 CAN 信号的 DisplayName 格式："{MessageName}.{SignalName}"
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/// </summary>
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public static string BuildDisplayName(string messageName, string signalName)
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{
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return $"{messageName}.{signalName}";
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}
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/// <summary>
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/// 生成 CAN 信号的 MethodName 格式："{MessageId:X}.{SignalName}"
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/// </summary>
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public static string BuildMethodName(uint messageId, string signalName)
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{
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return $"{messageId:X}.{signalName}";
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}
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/// <summary>
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/// 生成 CAN 信号的 Fingerprint 格式："CAN:{Channel}"
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/// </summary>
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public static string BuildFingerprint(uint channel)
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{
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return $"CAN:{channel}";
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}
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public void Dispose()
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{
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if (_disposed) return;
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_disposed = true;
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Unbind();
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}
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}
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}
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