Updated applications

Software/LogicAnalyzer/CLCapture/Program.cs

@@ -130,8 +130,25 @@ return await Parser.Default.ParseArguments<CLCaptureCommandLineOptions>(args)
             if (opts.Trigger.TriggerType == CLTriggerType.Edge)
             {
                 Console.WriteLine("Starting edge triggered capture...");
-                driver.StartCapture(opts.SamplingFrequency, opts.PreSamples, opts.PostSamples,
+                var resStart = driver.StartCapture(opts.SamplingFrequency, opts.PreSamples, opts.PostSamples,
                     channels, opts.Trigger.Channel - 1, opts.Trigger.Value == "0", CaptureFinished);
+
+                if (resStart != CaptureError.None)
+                {
+                    switch (resStart)
+                    {
+                        case CaptureError.Busy:
+                            Console.WriteLine("Device is busy, stop the capture before starting a new one.");
+                            return -1;
+                        case CaptureError.BadParams:
+                            Console.WriteLine("Specified parameters are incorrect.\r\n\r\n    -Frequency must be between 3.1Khz and 100Mhz\r\n    -PreSamples must be between 2 and 31743\r\n    -PostSamples must be between 512 and 32767\r\n    -Total samples cannot exceed 32767");
+                            return -1;
+                        case CaptureError.HardwareError:
+                            Console.WriteLine("Device reported error starting capture. Restart the device and try again.");
+                            return -1;
+                    }
+                }
+
                 Console.WriteLine("Capture running...");
             }
             else
@@ -150,8 +167,25 @@ return await Parser.Default.ParseArguments<CLCaptureCommandLineOptions>(args)
                         triggerPattern |= (UInt16)(1 << buc);
                 }
 
-                driver.StartPatternCapture(opts.SamplingFrequency, opts.PreSamples, opts.PostSamples,
+                var resStart = driver.StartPatternCapture(opts.SamplingFrequency, opts.PreSamples, opts.PostSamples,
                     channels, opts.Trigger.Channel - 1, bitCount, triggerPattern, opts.Trigger.TriggerType == CLTriggerType.Fast, CaptureFinished);
+
+                if (resStart != CaptureError.None)
+                {
+                    switch (resStart)
+                    {
+                        case CaptureError.Busy:
+                            Console.WriteLine("Device is busy, stop the capture before starting a new one.");
+                            return -1;
+                        case CaptureError.BadParams:
+                            Console.WriteLine("Specified parameters are incorrect.\r\n\r\n    -Frequency must be between 3.1Khz and 100Mhz\r\n    -PreSamples must be between 2 and 31743\r\n    -PostSamples must be between 512 and 32767\r\n    -Total samples cannot exceed 32767");
+                            return -1;
+                        case CaptureError.HardwareError:
+                            Console.WriteLine("Device reported error starting capture. Restart the device and try again.");
+                            return -1;
+                    }
+                }
+
                 Console.WriteLine("Capture running...");
             }
 

Software/LogicAnalyzer/LogicAnalyzer/Classes/ExportedCapture.cs

@@ -1,5 +1,4 @@
-using LogicAnalyzer.Classes;
+using Newtonsoft.Json;
-using Newtonsoft.Json;
 using SharedDriver;
 using System;
 using System.Collections.Generic;
@@ -7,7 +6,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace LogicAnalyzer
+namespace LogicAnalyzer.Classes
 {
     public class ExportedCapture
     {

Software/LogicAnalyzer/LogicAnalyzer/Classes/GraphicObjectsCache.cs

@@ -25,7 +25,7 @@ namespace LogicAnalyzer.Classes
 
         public static Pen GetPen(Color PenColor, double PenThickness, IDashStyle Style = null)
         {
-            string key = "COLOR" + PenColor.ToString() + PenThickness.ToString() + (Style?.ToString() ?? "");
+            string key = "COLOR" + PenColor.ToString() + PenThickness.ToString() + GetDashName(Style);
 
             if (!_pens.ContainsKey(key))
             {
@@ -39,7 +39,7 @@ namespace LogicAnalyzer.Classes
 
         public static Pen GetPen(IBrush PenBrush, double PenThickness, IDashStyle Style = null)
         {
-            string key = "BRUSH" + PenBrush.GetHashCode().ToString() + PenThickness.ToString() + (Style?.ToString() ?? "");
+            string key = "BRUSH" + PenBrush.GetHashCode().ToString() + PenThickness.ToString() + GetDashName(Style);
 
             if (!_pens.ContainsKey(key))
             {
@@ -50,5 +50,10 @@ namespace LogicAnalyzer.Classes
 
             return _pens[key];
         }
+
+        static string GetDashName(IDashStyle Style)
+        {
+            return Style == null ? "" : string.Join("", Style.Dashes) + "-" + Style.Offset.ToString();
+        }
     }
 }

Software/LogicAnalyzer/LogicAnalyzer/Classes/SelectedSampleRegion.cs

@@ -19,7 +19,7 @@ namespace LogicAnalyzer.Classes
     {
         public int FirstSample { get; set; }
         public int LastSample { get; set; }
-        public int SampleCount { get { return LastSample - FirstSample; } }
+        public int SampleCount { get { return Math.Abs(LastSample - FirstSample); } }
         public string RegionName { get; set; } = "";
         public Color RegionColor { get; set; } = Color.FromArgb(128, 255,255,255);
 

Software/LogicAnalyzer/LogicAnalyzer/Controls/ChannelViewer.axaml.cs

@@ -123,4 +123,15 @@ namespace LogicAnalyzer.Controls
     {
         public SelectedSampleRegion? Region { get; set; }
     }
+
+    public class SamplesEventArgs : EventArgs
+    {
+        public int FirstSample { get; set; }
+        public int SampleCount { get; set; }
+    }
+
+    public class UserMarkerEventArgs : EventArgs
+    {
+        public int Position { get; set; }
+    }
 }

Software/LogicAnalyzer/LogicAnalyzer/Controls/SampleMarker.axaml

@@ -8,5 +8,12 @@
     <TextBlock Margin="0,0,0,0" Name="lblLeft" VerticalAlignment="Center" HorizontalAlignment="Left"></TextBlock>
     <TextBlock Name="lblCenter" VerticalAlignment="Center" HorizontalAlignment="Center"></TextBlock>
     <TextBlock Margin="0,0,0,0" Name="lblRight" VerticalAlignment="Center" HorizontalAlignment="Right"></TextBlock>
+
+    <Panel.ContextMenu>
+        <ContextMenu Name="rgnDeleteMenu">
+        <MenuItem Header="Delete regions" Name="mnuDeleteRegions" />
+        <MenuItem Header="Delete regions and samples" Name="mnuDeleteRegionsSamples" />
+      </ContextMenu>
+    </Panel.ContextMenu>
   </Panel>
 </UserControl>

Software/LogicAnalyzer/LogicAnalyzer/Controls/SampleMarker.axaml.cs

@@ -50,14 +50,59 @@ namespace LogicAnalyzer.Controls
         public event EventHandler<RegionEventArgs> RegionCreated;
         public event EventHandler<RegionEventArgs> RegionDeleted;
 
+        public event EventHandler<SamplesEventArgs> SamplesDeleted;
+        public event EventHandler<UserMarkerEventArgs> UserMarkerSelected;
+
         List<SelectedSampleRegion> regions = new List<SelectedSampleRegion>();
 
         SelectedSampleRegion? regionUnderConstruction;
+        SelectedSampleRegion[] regionsToDelete = null; 
+
+        int? userMarker = null;
         public SelectedSampleRegion[] SelectedRegions { get { return regions.ToArray(); } }
 
         public SampleMarker()
         {
             InitializeComponent();
+            mnuDeleteRegions.Click += MnuDeleteRegions_Click;
+            mnuDeleteRegionsSamples.Click += MnuDeleteRegionsSamples_Click;
+        }
+
+        private void MnuDeleteRegionsSamples_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+        {
+            var minDelete = regionsToDelete.Select(r => Math.Min(r.FirstSample, r.LastSample)).Min();
+            var maxDelete = regionsToDelete.Select(r => Math.Max(r.LastSample, r.FirstSample)).Max();
+
+            int len = maxDelete - minDelete;
+
+            if (RegionDeleted != null)
+            {
+                foreach (var region in regionsToDelete)
+                {
+                    RegionDeleted(this, new RegionEventArgs { Region = region });
+                    RemoveRegion(region);
+                }
+            }
+
+            if (SamplesDeleted != null)
+                SamplesDeleted(this, new SamplesEventArgs { FirstSample = minDelete, SampleCount = len });
+        }
+
+        private void MnuDeleteRegions_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+        {
+            var minDelete = regionsToDelete.Select(r => Math.Min(r.FirstSample, r.LastSample)).Min();
+            var maxDelete = regionsToDelete.Select(r => Math.Max(r.LastSample, r.FirstSample)).Max();
+
+            int len = maxDelete - minDelete;
+
+            if (RegionDeleted != null)
+            {
+                foreach (var region in regionsToDelete)
+                {
+                    RegionDeleted(this, new RegionEventArgs { Region = region });
+                    RemoveRegion(region);
+                }
+            }
         }
 
         public void AddRegion(SelectedSampleRegion Region)
@@ -111,8 +156,8 @@ namespace LogicAnalyzer.Controls
 
             if (regionUnderConstruction != null)
             {
-
+                int first = Math.Min(regionUnderConstruction.FirstSample, regionUnderConstruction.LastSample);
-                double start = (regionUnderConstruction.FirstSample - FirstSample) * sampleWidth;
+                double start = (first - FirstSample) * sampleWidth;
                 double end = sampleWidth * regionUnderConstruction.SampleCount;
                 context.FillRectangle(GraphicObjectsCache.GetBrush(regionUnderConstruction.RegionColor), new Rect(start, 0, end, this.Bounds.Height));
 
@@ -122,7 +167,8 @@ namespace LogicAnalyzer.Controls
             {
                 foreach (var region in regions)
                 {
-                    double start = (region.FirstSample - FirstSample) * sampleWidth;
+                    int first = Math.Min(region.FirstSample, region.LastSample);
+                    double start = (first - FirstSample) * sampleWidth;
                     double end = sampleWidth * region.SampleCount;
                     context.FillRectangle(GraphicObjectsCache.GetBrush(region.RegionColor), new Rect(start, 0, end, this.Bounds.Height));
                     FormattedText text = new FormattedText(region.RegionName, Typeface.Default, 12, TextAlignment.Left, TextWrapping.NoWrap, Size.Infinity);
@@ -138,6 +184,11 @@ namespace LogicAnalyzer.Controls
                 double y2 = this.Bounds.Height;
 
                 context.DrawLine(GraphicObjectsCache.GetPen(Foreground, 1), new Point(x, y1), new Point(x, y2));
+
+                x = buc * sampleWidth;
+                y1 = halfHeight * 1.75f;
+
+                context.DrawLine(GraphicObjectsCache.GetPen(Foreground, 1), new Point(x, y1), new Point(x, y2));
             }
 
             base.Render(context);
@@ -191,7 +242,7 @@ namespace LogicAnalyzer.Controls
 
                     int ovrSample = (int)(pos.Position.X / sampleWidth) + FirstSample;
 
-                    regionUnderConstruction = new SelectedSampleRegion { FirstSample = ovrSample, LastSample = ovrSample + 1 };
+                    regionUnderConstruction = new SelectedSampleRegion { FirstSample = ovrSample, LastSample = ovrSample };
                     this.InvalidateVisual();
                 }
             }
@@ -229,12 +280,48 @@ namespace LogicAnalyzer.Controls
                     double sampleWidth = this.Bounds.Width / (float)VisibleSamples;
                     int ovrSample = (int)(pos.Position.X / sampleWidth) + FirstSample;
                     regionUnderConstruction.LastSample = ovrSample + 1;
+
+                    if (regionUnderConstruction.LastSample < regionUnderConstruction.FirstSample)
+                    {
+                        int val = regionUnderConstruction.FirstSample;
+                        regionUnderConstruction.FirstSample = regionUnderConstruction.LastSample;
+                        regionUnderConstruction.LastSample = val;
+                    }
+
                     var rgn = regionUnderConstruction;
                     regionUnderConstruction = null;
 
                     if (rgn.SampleCount > 0)
                     {
-                        ShowDialog(rgn);
+                        if (rgn.SampleCount == 1)
+                        {
+
+                            if(userMarker != null && userMarker == rgn.FirstSample)
+                                userMarker = null;
+
+                            if (e.InputModifiers.HasFlag(InputModifiers.Shift) && userMarker != null)
+                            {
+
+                                if (this.UserMarkerSelected != null)
+                                    this.UserMarkerSelected(this, new UserMarkerEventArgs { Position = userMarker.Value });
+
+                                rgn.FirstSample = userMarker.Value;
+
+                                userMarker = null;
+
+                                ShowDialog(rgn);
+                                return;
+                            }
+
+                            userMarker = rgn.FirstSample;
+
+                            if (this.UserMarkerSelected != null)
+                                this.UserMarkerSelected(this, new UserMarkerEventArgs { Position = rgn.FirstSample });
+
+                            this.InvalidateVisual();
+                        }
+                        else
+                            ShowDialog(rgn);
                         
                     }
                     else
@@ -245,18 +332,26 @@ namespace LogicAnalyzer.Controls
                     double sampleWidth = this.Bounds.Width / (float)VisibleSamples;
                     int ovrSample = (int)(pos.Position.X / sampleWidth) + FirstSample;
 
-                    var toDelete = regions.Where(r => ovrSample >= r.FirstSample && ovrSample < r.LastSample).ToArray();
+                    var toDelete = regions.Where(r => ovrSample >= Math.Min(r.FirstSample , r.LastSample) && ovrSample < Math.Max(r.FirstSample, r.LastSample)).ToArray();
 
-                    foreach (var region in toDelete)
+                    if (toDelete != null && toDelete.Length > 0)
                     {
-                        if (ovrSample >= region.FirstSample && ovrSample < region.LastSample)
+                        regionsToDelete= toDelete;
-                        {
+                        rgnDeleteMenu.PlacementRect = new Rect(pos.Position.X, pos.Position.Y, 1, 1);
-                            if (RegionDeleted != null)
+                        rgnDeleteMenu.Open();
-                                RegionDeleted(this, new RegionEventArgs { Region = region });
-
-                            RemoveRegion(region);
-                        }
                     }
+
+                    //foreach (var region in toDelete)
+                    //{
+                    //    if (ovrSample >= region.FirstSample && ovrSample < region.LastSample)
+                    //    {
+
+                    //        if (RegionDeleted != null)
+                    //            RegionDeleted(this, new RegionEventArgs { Region = region });
+
+                    //        RemoveRegion(region);
+                    //    }
+                    //}
                 }
             }
         }

Software/LogicAnalyzer/LogicAnalyzer/Controls/SampleViewer.axaml.cs

@@ -19,6 +19,8 @@ namespace LogicAnalyzer.Controls
         public int SamplesInScreen { get; set; }
         public int FirstSample { get; set; }
 
+        public int? UserMarker { get; set; }
+
         bool updating = false;
 
         List<SelectedSampleRegion> regions = new List<SelectedSampleRegion>();
@@ -26,8 +28,11 @@ namespace LogicAnalyzer.Controls
         public SelectedSampleRegion[] SelectedRegions { get { return regions.ToArray(); } }
 
         List<ProtocolAnalyzedChannel> analysisData = new List<ProtocolAnalyzedChannel>();
-        Color sampleLineColor = Color.FromArgb(80,120,120,120);
+        Color sampleLineColor = Color.FromArgb(80, 120, 120, 120);
         Color triggerLineColor = Colors.White;
+        Color userLineColor = Colors.Cyan;
+        DashStyle halfDash = new DashStyle(new double[] { 1, 8 }, 0);
+        DashStyle fullDash = new DashStyle(new double[] { 4, 5 }, 0);
         public SampleViewer()
         {
             InitializeComponent();
@@ -107,7 +112,8 @@ namespace LogicAnalyzer.Controls
                 {
                     foreach (var region in regions)
                     {
-                        double start = (region.FirstSample - FirstSample) * sampleWidth;
+                        int first = Math.Min(region.FirstSample, region.LastSample);
+                        double start = (first - FirstSample) * sampleWidth;
                         double end = sampleWidth * region.SampleCount;
                         context.FillRectangle(GraphicObjectsCache.GetBrush(region.RegionColor), new Rect(start, 0, end, this.Bounds.Height));
                     }
@@ -120,11 +126,16 @@ namespace LogicAnalyzer.Controls
                     uint prevSample = buc == 0 ? 0 : Samples[buc - 1];
                     double lineX = (buc - FirstSample) * sampleWidth;
 
-                    context.DrawLine(GraphicObjectsCache.GetPen(sampleLineColor, 1, DashStyle.Dash), new Point(lineX + sampleWidth / 2, 0), new Point(lineX + sampleWidth / 2, thisBounds.Height));
+                    context.DrawLine(GraphicObjectsCache.GetPen(sampleLineColor, 1, fullDash), new Point(lineX + sampleWidth / 2, 0), new Point(lineX + sampleWidth / 2, thisBounds.Height));
+
+                    context.DrawLine(GraphicObjectsCache.GetPen(sampleLineColor, 1, halfDash), new Point(lineX, 0), new Point(lineX, thisBounds.Height));
 
                     if (buc == PreSamples)
                         context.DrawLine(GraphicObjectsCache.GetPen(triggerLineColor, 2), new Point(lineX, 0), new Point(lineX, thisBounds.Height));
 
+                    if(UserMarker != null && UserMarker == buc)
+                        context.DrawLine(GraphicObjectsCache.GetPen(userLineColor, 2, DashStyle.DashDot), new Point(lineX, 0), new Point(lineX, thisBounds.Height));
+
                     for (int chan = 0; chan < ChannelCount; chan++)
                     {
                         double lineY;

Software/LogicAnalyzer/LogicAnalyzer/Dialogs/CaptureDialog.axaml

@@ -27,11 +27,11 @@
         </StackPanel>
         <StackPanel Grid.Column="1" Orientation="Horizontal" HorizontalAlignment="Center">
           <TextBlock VerticalAlignment="Center" Margin="0,0,5,0">Pre samples:</TextBlock>
-          <NumericUpDown Width="130" Height="35" Value="512" Minimum="0" Maximum="32767" Name="nudPreSamples"></NumericUpDown>
+          <NumericUpDown Width="130" Height="35" Value="512" Minimum="2" Maximum="31743" Name="nudPreSamples"></NumericUpDown>
         </StackPanel>
         <StackPanel Grid.Column="2" Orientation="Horizontal" HorizontalAlignment="Right">
           <TextBlock VerticalAlignment="Center" Margin="0,0,5,0">Post samples:</TextBlock>
-          <NumericUpDown Width="130" Height="35" Value="1024" Minimum="0" Maximum="32767" Name="nudPostSamples"></NumericUpDown>
+          <NumericUpDown Width="130" Height="35" Value="1024" Minimum="512" Maximum="32767" Name="nudPostSamples"></NumericUpDown>
         </StackPanel>
       </Grid>
       <Grid Grid.Row="1" RowDefinitions="2*,5*">

Software/LogicAnalyzer/LogicAnalyzer/MainWindow.axaml.cs

@@ -40,6 +40,8 @@ namespace LogicAnalyzer
             btnAbort.Click += btnAbort_Click;
             sampleMarker.RegionCreated += sampleMarker_RegionCreated;
             sampleMarker.RegionDeleted += sampleMarker_RegionDeleted;
+            sampleMarker.UserMarkerSelected += sampleMarker_UserMarkerSelected;
+            sampleMarker.SamplesDeleted += SampleMarker_SamplesDeleted;
             tkInScreen.PropertyChanged += tkInScreen_ValueChanged;
             scrSamplePos.Scroll += scrSamplePos_ValueChanged;
             mnuOpen.Click += mnuOpen_Click;
@@ -50,6 +52,124 @@ namespace LogicAnalyzer
             RefreshPorts();
         }
 
+        private async void SampleMarker_SamplesDeleted(object? sender, SamplesEventArgs e)
+        {
+            var lastSample = e.FirstSample + e.SampleCount - 1;
+            var triggerSample = sampleViewer.PreSamples - 1;
+
+            var containsTrigger = e.FirstSample <= triggerSample && lastSample >= triggerSample;
+
+            if(containsTrigger) 
+            {
+                await ShowError("Error", "Cannot delete the trigger sample.");
+                return;
+            }
+
+            var preDelete = sampleViewer.Samples.Take(e.FirstSample);
+            var postDelete = sampleViewer.Samples.Skip(e.FirstSample + e.SampleCount);
+
+            var finalSamples = preDelete.Concat(postDelete).ToArray();
+
+            var finalPreSamples = e.FirstSample > triggerSample ? sampleViewer.PreSamples : sampleViewer.PreSamples - e.SampleCount;
+
+            var regions = sampleViewer.SelectedRegions;
+            List<SelectedSampleRegion> finalRegions = new List<SelectedSampleRegion>();
+
+            foreach(var region in regions) 
+            {
+                int minRegion = Math.Min(region.FirstSample, region.LastSample);
+                int maxRegion = Math.Max(region.FirstSample, region.LastSample);
+
+                if (minRegion >= e.FirstSample && maxRegion <= lastSample) //removed
+                    continue;
+
+                if (maxRegion <= e.FirstSample && maxRegion <= lastSample) //Region before delete, do not modify
+                {
+                    finalRegions.Add(region);
+                    continue;
+                }
+                else if (minRegion >= e.FirstSample && minRegion >= lastSample) //Region after delete, offset n samples
+                {
+                    region.FirstSample -= e.SampleCount;
+                    region.LastSample -= e.SampleCount;
+                    finalRegions.Add(region);
+                    continue;
+                }
+                else if (minRegion >= e.FirstSample && maxRegion > lastSample) //Begin of region cropped
+                {
+                    region.FirstSample = lastSample + 1;
+                    region.LastSample = maxRegion;
+
+                    if (region.LastSample - region.FirstSample < 1) //Regions smaller than 2 samples are removed
+                        continue;
+
+                    region.FirstSample -= e.SampleCount;
+                    region.LastSample -= e.SampleCount;
+                    finalRegions.Add(region);
+                    continue;
+                }
+                else if (minRegion < e.FirstSample && maxRegion <= lastSample) //End of region cropped
+                {
+                    region.FirstSample = minRegion;
+                    region.LastSample = e.FirstSample;
+
+                    if (region.LastSample - region.FirstSample < 1) //Regions smaller than 2 samples are removed
+                        continue;
+
+                    finalRegions.Add(region);
+                    continue;
+                }
+                else //Deleted samples are inside region (not possible, just left for sanity)
+                {
+                    region.LastSample -= e.SampleCount;
+
+                    if (region.LastSample - region.FirstSample < 1) //Regions smaller than 2 samples are removed
+                        continue;
+
+                    finalRegions.Add(region);
+                    continue;
+                }
+            }
+
+            sampleViewer.BeginUpdate();
+            sampleViewer.Samples = finalSamples;
+            sampleViewer.PreSamples = finalPreSamples;
+            sampleViewer.SamplesInScreen = Math.Min(100, finalSamples.Length / 10);
+
+            if(sampleViewer.FirstSample > finalSamples.Length - 1)
+                sampleViewer.FirstSample = finalSamples.Length - 1;
+
+            sampleViewer.ClearRegions();
+            sampleViewer.ClearAnalyzedChannels();
+
+            if (finalRegions.Count > 0)
+                sampleViewer.AddRegions(finalRegions);
+
+            sampleViewer.EndUpdate();
+
+            sampleMarker.VisibleSamples = sampleViewer.SamplesInScreen;
+            sampleMarker.FirstSample = sampleViewer.FirstSample;
+            sampleMarker.ClearRegions();
+
+            if (finalRegions.Count > 0)
+                sampleMarker.AddRegions(finalRegions);
+
+            scrSamplePos.Maximum = finalSamples.Length - 1;
+            scrSamplePos.Value = e.FirstSample - 1;
+        }
+
+        private void sampleMarker_UserMarkerSelected(object? sender, UserMarkerEventArgs e)
+        {
+            sampleViewer.BeginUpdate();
+
+            if (sampleViewer.UserMarker != null && sampleViewer.UserMarker == e.Position)
+                sampleViewer.UserMarker = null;
+            else
+                sampleViewer.UserMarker = e.Position;
+
+            sampleViewer.EndUpdate();
+        }
+
         protected override void OnOpened(EventArgs e)
         {
             base.OnOpened(e);
@@ -320,26 +440,41 @@ namespace LogicAnalyzer
 
             if (settings.TriggerType != 0)
             {
-                if (!driver.StartPatternCapture(settings.Frequency, settings.PreTriggerSamples, settings.PostTriggerSamples, settings.CaptureChannels, settings.TriggerChannel, settings.TriggerBitCount, settings.TriggerPattern, settings.TriggerType == 2 ? true : false))
+                var error = driver.StartPatternCapture(settings.Frequency, settings.PreTriggerSamples, settings.PostTriggerSamples, settings.CaptureChannels, settings.TriggerChannel, settings.TriggerBitCount, settings.TriggerPattern, settings.TriggerType == 2 ? true : false);
-                {
+
-                    await ShowError("Error", "Device reported error starting capture. Restart the device and try again.");
+                if(error != CaptureError.None)
-                    return;
+                    await ShowError(error);
-                }
             }
             else
             {
-                if (!driver.StartCapture(settings.Frequency, settings.PreTriggerSamples, settings.PostTriggerSamples, settings.CaptureChannels, settings.TriggerChannel, settings.TriggerInverted))
+                var error = driver.StartCapture(settings.Frequency, settings.PreTriggerSamples, settings.PostTriggerSamples, settings.CaptureChannels, settings.TriggerChannel, settings.TriggerInverted);
-                {
+
-                    await ShowError("Error", "Device reported error starting capture. Restart the device and try again.");
+                if (error != CaptureError.None)
-                    return;
+                    await ShowError(error);
-                }
             }
+
             btnCapture.IsEnabled = false;
             btnRepeat.IsEnabled = false;
             btnOpenClose.IsEnabled = false;
             btnAbort.IsEnabled = true;
         }
 
+        private async Task ShowError(CaptureError error)
+        {
+            switch (error)
+            {
+                case CaptureError.Busy:
+                    await ShowError("Error", "Device is busy, stop the capture before starting a new one.");
+                    return;
+                case CaptureError.BadParams:
+                    await ShowError("Error", "Specified parameters are incorrect.\r\n\r\n    -Frequency must be between 3.1Khz and 100Mhz\r\n    -PreSamples must be between 2 and 31743\r\n    -PostSamples must be between 512 and 32767\r\n    -Total samples cannot exceed 32767");
+                    return;
+                case CaptureError.HardwareError:
+                    await ShowError("Error", "Device reported error starting capture. Restart the device and try again.");
+                    return;
+            }
+        }
+
         private void scrSamplePos_ValueChanged(object? sender, ScrollEventArgs e)
         {
             if (sampleViewer.Samples != null)

Software/LogicAnalyzer/SharedDriver/LogicAnalyzerDriver.cs

@@ -45,14 +45,14 @@ namespace SharedDriver
             baseStream.ReadTimeout = Timeout.Infinite;
         }
 
-        public bool StartCapture(int Frequency, int PreSamples, int PostSamples, int[] Channels, int TriggerChannel, bool TriggerInverted, Action<CaptureEventArgs>? CaptureCompletedHandler = null)
+        public CaptureError StartCapture(int Frequency, int PreSamples, int PostSamples, int[] Channels, int TriggerChannel, bool TriggerInverted, Action<CaptureEventArgs>? CaptureCompletedHandler = null)
         {
 
             if (capturing)
-                return false;
+                return CaptureError.Busy;
 
-            if (Channels == null || Channels.Length == 0 || PreSamples < 2 || PreSamples > (16 * 1024) || (PreSamples + PostSamples) >= (32 * 1024) || Frequency > 100000000)
+            if (Channels == null || Channels.Length == 0 || PreSamples < 2 || PreSamples > (30 * 1024 - 1) || PostSamples < 512 || (PreSamples + PostSamples) >= (32 * 1024) || Frequency < 3100 || Frequency > 100000000)
-                return false;
+                return CaptureError.BadParams;
 
             channelCount = Channels.Length;
             triggerChannel = Array.IndexOf(Channels, TriggerChannel);
@@ -89,18 +89,18 @@ namespace SharedDriver
             {
                 capturing = true;
                 Task.Run(() => ReadCapture(PreSamples + PostSamples));
-                return true;
+                return CaptureError.None;
             }
-            return false;
+            return CaptureError.HardwareError;
         }
-        public bool StartPatternCapture(int Frequency, int PreSamples, int PostSamples, int[] Channels, int TriggerChannel, int TriggerBitCount, UInt16 TriggerPattern, bool Fast, Action<CaptureEventArgs>? CaptureCompletedHandler = null)
+        public CaptureError StartPatternCapture(int Frequency, int PreSamples, int PostSamples, int[] Channels, int TriggerChannel, int TriggerBitCount, UInt16 TriggerPattern, bool Fast, Action<CaptureEventArgs>? CaptureCompletedHandler = null)
         {
 
             if (capturing)
-                return false;
+                return CaptureError.Busy;
 
-            if (Channels == null || Channels.Length == 0 || PreSamples < 2 || PreSamples > (16 * 1024) || (PreSamples + PostSamples) >= (32 * 1024) || Frequency > 100000000)
+            if (Channels == null || Channels.Length == 0 || PreSamples < 2 || PreSamples > (30 * 1024 - 1) || PostSamples < 512 || (PreSamples + PostSamples) >= (32 * 1024) || Frequency < 3100 || Frequency > 100000000)
-                return false;
+                return CaptureError.BadParams;
 
             channelCount = Channels.Length;
             triggerChannel = Array.IndexOf(Channels, TriggerChannel);
@@ -138,9 +138,9 @@ namespace SharedDriver
             {
                 capturing = true;
                 Task.Run(() => ReadCapture(PreSamples + PostSamples));
-                return true;
+                return CaptureError.None;
             }
-            return false;
+            return CaptureError.HardwareError;
         }
 
         public bool StopCapture()
@@ -321,6 +321,14 @@ namespace SharedDriver
 
     }
 
+    public enum CaptureError
+    { 
+        None,
+        Busy,
+        BadParams,
+        HardwareError
+    }
+
     public class CaptureEventArgs : EventArgs
     {
         public int TriggerChannel { get; set; }