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IOModuleTestBlazor/Services/CanService.cs

@@ -11,7 +11,10 @@ public class CanService : ICanService
     private readonly object _lock = new();
 
     public bool IsConnected { get; private set; }
-    public string ChannelName => _channel.ToString();
+    public string ChannelName => IsConnected ? _channel.ToString() : "";
+    public Bitrate CurrentBitrate { get; private set; }
+
+    private (PcanChannel Channel, Bitrate Bitrate)? _pendingReinit;
 
     public event Action<CanMessageDto>? MessageReceived;
 
@@ -103,6 +106,42 @@ public class CanService : ICanService
 
     // ── PCAN passthrough ──────────────────────────────────────────────────────
 
+    public IReadOnlyList<PcanChannel> GetAvailableChannels()
+    {
+        var available = new List<PcanChannel>();
+        foreach (var ch in Enum.GetValues<PcanChannel>()
+            .Where(c => c.ToString().StartsWith("Usb", StringComparison.OrdinalIgnoreCase))
+            .OrderBy(c => c.ToString()))
+        {
+            var result = Api.GetValue(ch, PcanParameter.ChannelCondition, out uint condition);
+            if (result == PcanStatus.OK && condition != 0)
+                available.Add(ch);
+        }
+        return available;
+    }
+
+    public void RequestReinitialize(PcanChannel channel, Bitrate bitrate)
+    {
+        lock (_lock) _pendingReinit = (channel, bitrate);
+    }
+
+    public bool TryConsumePendingReinit(out PcanChannel channel, out Bitrate bitrate)
+    {
+        lock (_lock)
+        {
+            if (_pendingReinit.HasValue)
+            {
+                channel = _pendingReinit.Value.Channel;
+                bitrate = _pendingReinit.Value.Bitrate;
+                _pendingReinit = null;
+                return true;
+            }
+            channel = default;
+            bitrate = default;
+            return false;
+        }
+    }
+
     public void Initialize(PcanChannel channel, Bitrate bitrate)
     {
         _channel = channel;
@@ -110,6 +149,7 @@ public class CanService : ICanService
         if (result != PcanStatus.OK)
             throw new InvalidOperationException($"CAN init failed: {GetErrorText(result)}");
         IsConnected = true;
+        CurrentBitrate = bitrate;
     }
 
     public void Uninitialize()

IOModuleTestBlazor/Services/ICanService.cs

@@ -7,6 +7,7 @@ public interface ICanService
 {
     bool IsConnected { get; }
     string ChannelName { get; }
+    Bitrate CurrentBitrate { get; }
 
     /// <summary>
     /// Raised on the worker thread each time a CAN message passes all filters.
@@ -31,6 +32,20 @@ public interface ICanService
     IReadOnlyDictionary<string, double> ExtractSignals(uint messageId, byte[] data);
     void PublishMessage(CanMessageDto dto);
 
+    // ── Channel management ────────────────────────────────────────────────────
+
+    /// <summary>Returns all PCAN USB channels that are currently available.</summary>
+    IReadOnlyList<PcanChannel> GetAvailableChannels();
+
+    /// <summary>
+    /// Asks the worker to reinitialise on the next loop iteration.
+    /// Non-blocking — the actual reconnect happens asynchronously.
+    /// </summary>
+    void RequestReinitialize(PcanChannel channel, Bitrate bitrate);
+
+    /// <summary>Called by the worker to pick up a pending reinit request.</summary>
+    bool TryConsumePendingReinit(out PcanChannel channel, out Bitrate bitrate);
+
     // ── PCAN passthrough ──────────────────────────────────────────────────────
     void Initialize(PcanChannel channel, Bitrate bitrate);
     void Uninitialize();