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AnTiSwitch Oct 19, 2025
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78 changes: 41 additions & 37 deletions NetSdrClientApp/NetSdrClient.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,22 +2,22 @@
using NetSdrClientApp.Networking;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Channels;
using System.Threading.Tasks;
using static NetSdrClientApp.Messages.NetSdrMessageHelper;
using static System.Runtime.InteropServices.JavaScript.JSType;

namespace NetSdrClientApp
{
public class NetSdrClient
{
private ITcpClient _tcpClient;
private IUdpClient _udpClient;
private readonly ITcpClient _tcpClient;
private readonly IUdpClient _udpClient;

public bool IQStarted { get; set; }
public bool IQStarted { get; private set; }

public event Action<byte[]>? UnsolicitedMessageReceived;

public NetSdrClient(ITcpClient tcpClient, IUdpClient udpClient)
{
Expand All @@ -38,12 +38,11 @@ public async Task ConnectAsync()
var automaticFilterMode = BitConverter.GetBytes((ushort)0).ToArray();
var adMode = new byte[] { 0x00, 0x03 };

//Host pre setup
var msgs = new List<byte[]>
{
NetSdrMessageHelper.GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.IQOutputDataSampleRate, sampleRate),
NetSdrMessageHelper.GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.RFFilter, automaticFilterMode),
NetSdrMessageHelper.GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.ADModes, adMode),
GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.IQOutputDataSampleRate, sampleRate),
GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.RFFilter, automaticFilterMode),
GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.ADModes, adMode),
};

foreach (var msg in msgs)
Expand All @@ -66,19 +65,15 @@ public async Task StartIQAsync()
return;
}

; var iqDataMode = (byte)0x80;
var iqDataMode = (byte)0x80;
var start = (byte)0x02;
var fifo16bitCaptureMode = (byte)0x01;
var n = (byte)1;

var args = new[] { iqDataMode, start, fifo16bitCaptureMode, n };

var msg = NetSdrMessageHelper.GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.ReceiverState, args);

var msg = GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.ReceiverState, args);
await SendTcpRequest(msg);

IQStarted = true;

_ = _udpClient.StartListeningAsync();
}

Expand All @@ -91,15 +86,10 @@ public async Task StopIQAsync()
}

var stop = (byte)0x01;

var args = new byte[] { 0, stop, 0, 0 };

var msg = NetSdrMessageHelper.GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.ReceiverState, args);

var msg = GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.ReceiverState, args);
await SendTcpRequest(msg);

IQStarted = false;

_udpClient.StopListening();
}

Expand All @@ -108,16 +98,14 @@ public async Task ChangeFrequencyAsync(long hz, int channel)
var channelArg = (byte)channel;
var frequencyArg = BitConverter.GetBytes(hz).Take(5);
var args = new[] { channelArg }.Concat(frequencyArg).ToArray();

var msg = NetSdrMessageHelper.GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.ReceiverFrequency, args);

var msg = GetControlItemMessage(MsgTypes.SetControlItem, ControlItemCodes.ReceiverFrequency, args);
await SendTcpRequest(msg);
}

private void _udpClient_MessageReceived(object? sender, byte[] e)
private static void _udpClient_MessageReceived(object? sender, byte[] e)
{
NetSdrMessageHelper.TranslateMessage(e, out MsgTypes type, out ControlItemCodes code, out ushort sequenceNum, out byte[] body);
var samples = NetSdrMessageHelper.GetSamples(16, body);
TranslateMessage(e, out _, out _, out _, out byte[] body);
var samples = GetSamples(16, body);

Console.WriteLine($"Samples recieved: " + body.Select(b => Convert.ToString(b, toBase: 16)).Aggregate((l, r) => $"{l} {r}"));

Expand All @@ -126,40 +114,56 @@ private void _udpClient_MessageReceived(object? sender, byte[] e)
{
foreach (var sample in samples)
{
sw.Write((short)sample); //write 16 bit per sample as configured
sw.Write((short)sample);
}
}
}

private TaskCompletionSource<byte[]> responseTaskSource;
private TaskCompletionSource<byte[]>? responseTaskSource;

private async Task<byte[]> SendTcpRequest(byte[] msg)
{
if (!_tcpClient.Connected)
{
Console.WriteLine("No active connection.");
return null;
return Array.Empty<byte>();
}

responseTaskSource = new TaskCompletionSource<byte[]>(TaskCreationOptions.RunContinuationsAsynchronously);
var responseTask = responseTaskSource.Task;

await _tcpClient.SendMessageAsync(msg);

var resp = await responseTask;

return resp;
using (var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5)))
{
var completedTask = await Task.WhenAny(responseTask, Task.Delay(-1, cts.Token));
if (completedTask == responseTask)
{
await cts.CancelAsync();
return await responseTask;
}
else
{
responseTaskSource?.TrySetCanceled();
throw new TimeoutException("The request timed out.");
}
}
}

private void _tcpClient_MessageReceived(object? sender, byte[] e)
{
//TODO: add Unsolicited messages handling here
if (responseTaskSource != null)
var tcs = responseTaskSource;
if (tcs != null)
{
responseTaskSource.SetResult(e);
responseTaskSource = null;
tcs.SetResult(e);
}
else
{
UnsolicitedMessageReceived?.Invoke(e);
}
Console.WriteLine("Response recieved: " + e.Select(b => Convert.ToString(b, toBase: 16)).Aggregate((l, r) => $"{l} {r}"));
}
}
}

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