Added PicoPi config tool

.gitignore

@@ -10,4 +10,257 @@ compile_commands.json
 CTestTestfile.cmake
 _deps
 [Bb]uild/
-.vscode
+.vscode
+
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+
+# Visual Studio 2015 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# DNX
+project.lock.json
+artifacts/
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# TODO: Comment the next line if you want to checkin your web deploy settings
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/repositories.config
+# NuGet v3's project.json files produces more ignoreable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.pfx
+*.publishsettings
+node_modules/
+orleans.codegen.cs
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+*.mdf
+*.ldf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# JetBrains Rider
+.idea/
+*.sln.iml

PicoPiConfig/ActionCommand.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Windows.Input;
+
+namespace PicoPiConfig
+{
+    public class ActionCommand : ICommand
+    {
+        private Action _action;
+        private Func<bool>? _canExecute;
+
+        public event EventHandler? CanExecuteChanged;
+
+        public ActionCommand(Action action, Func<bool>? canExecute = null)
+        {
+            _action = action;
+            _canExecute = canExecute;
+        }
+
+        public bool CanExecute(object? parameter) => (_canExecute == null) || _canExecute();
+        public void Execute(object? parameter) => _action();
+    }
+
+    public class ActionCommand<T> : ICommand
+    {
+        private Action<T> _action;
+        private Func<bool>? _canExecute;
+
+        public event EventHandler? CanExecuteChanged;
+
+        public ActionCommand(Action<T> action, Func<bool>? canExecute = null)
+        {
+            _action = action;
+            _canExecute = canExecute;
+        }
+
+        public bool CanExecute(object? parameter) => (_canExecute == null) || _canExecute();
+        public void Execute(object? parameter) => _action((T)parameter!);
+    }
+}

PicoPiConfig/App.xaml

@@ -0,0 +1,4 @@
+<Application x:Class="PicoPiConfig.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             StartupUri="MainWindow.xaml" />

PicoPiConfig/App.xaml.cs

@@ -0,0 +1,7 @@
+using System.Windows;
+
+namespace PicoPiConfig
+{
+    public partial class App : Application
+    { }
+}

PicoPiConfig/AssemblyInfo.cs

@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]

PicoPiConfig/Channel.cs

@@ -0,0 +1,64 @@
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace PicoPiConfig
+{
+    public class Channel : INotifyPropertyChanged
+    {
+        #region Properties & Fields
+
+        private int _index;
+        public int Index
+        {
+            get => _index;
+            set
+            {
+                _index = value;
+                OnPropertyChanged();
+            }
+        }
+
+        private int _pin;
+        public int Pin
+        {
+            get => _pin;
+            set
+            {
+                _pin = value;
+                OnPropertyChanged();
+            }
+        }
+
+        private int _ledCount;
+        public int LedCount
+        {
+            get => _ledCount;
+            set
+            {
+                _ledCount = value;
+                OnPropertyChanged();
+            }
+        }
+
+        #endregion
+
+        #region Constructors
+
+        public Channel(int index, int pin, int ledCount)
+        {
+            this.Index = index;
+            this.Pin = pin;
+            this.LedCount = ledCount;
+        }
+
+        #endregion
+
+        #region PropertyChanged
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+            => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+
+        #endregion
+    }
+}

PicoPiConfig/MainWindow.xaml

@@ -0,0 +1,45 @@
+<Window x:Class="PicoPiConfig.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:PicoPiConfig"
+        mc:Ignorable="d"
+        Width="400" Height="440"
+        Title="RGB.NET PicoPi Configurator">
+
+    <Window.DataContext>
+        <local:MainWindowViewModel />
+    </Window.DataContext>
+
+    <DockPanel LastChildFill="True" Margin="16">
+        <Button DockPanel.Dock="Top" Content="Reload" Command="{Binding ReloadCommand}" />
+        <ComboBox DockPanel.Dock="Top" Margin="0,8" DisplayMemberPath="Id" SelectedItem="{Binding SelectedDevice}" ItemsSource="{Binding Devices}" />
+
+        <TextBlock DockPanel.Dock="Top" Text="{Binding SelectedDevice.Id, FallbackValue=-, StringFormat=SerialNumber: {0}}" />
+        <TextBlock DockPanel.Dock="Top" Margin="0,8" Text="{Binding SelectedDevice.Version, FallbackValue=-, StringFormat=Firmware version: {0}}" />
+
+        <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal" HorizontalAlignment="Center">
+            <Button Padding="4,2" Margin="0,0,8,0" Content="Save pins" Command="{Binding SavePinsCommand}" />
+            <Button Padding="4,2" Content="Save led-counts" Command="{Binding SaveLedCountsCommand}"  />
+        </StackPanel>
+
+        <TextBlock DockPanel.Dock="Bottom" Margin="0,8" TextWrapping="Wrap" Text="Please double check that the data above is valid (pin number exists on the device, led-count is in the range 0-255) before saving or you might corrupt the firmware of the device." />
+
+        <ItemsControl ItemsSource="{Binding Channels}">
+            <ItemsControl.ItemTemplate>
+                <DataTemplate DataType="{x:Type local:Channel}">
+                    <StackPanel Orientation="Horizontal">
+                        <TextBlock Width="80" FontWeight="Bold" Text="{Binding Index, StringFormat=Channel {0}}" />
+
+                        <TextBlock Text="Pin: " />
+                        <TextBox Margin="0,0,16,0" Width="40" Text="{Binding Pin}" />
+
+                        <TextBlock Text="Led-Count: " />
+                        <TextBox Margin="0,0,16,0" Width="40" Text="{Binding LedCount}" />
+                    </StackPanel>
+                </DataTemplate>
+            </ItemsControl.ItemTemplate>
+        </ItemsControl>
+    </DockPanel>
+</Window>

PicoPiConfig/MainWindow.xaml.cs

@@ -0,0 +1,12 @@
+using System.Windows;
+
+namespace PicoPiConfig
+{
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+    }
+}

PicoPiConfig/MainWindowViewModel.cs

@@ -0,0 +1,130 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Windows;
+using HidSharp;
+using RGB.NET.Devices.PicoPi;
+
+namespace PicoPiConfig
+{
+    public class MainWindowViewModel : INotifyPropertyChanged
+    {
+        #region Properties & Fields
+
+        private List<PicoPiSDK>? _devices;
+        public List<PicoPiSDK>? Devices
+        {
+            get => _devices;
+            set
+            {
+                _devices = value;
+                OnPropertyChanged();
+            }
+        }
+
+        private PicoPiSDK? _selectedDevice;
+        public PicoPiSDK? SelectedDevice
+        {
+            get => _selectedDevice;
+            set
+            {
+                _selectedDevice = value;
+                OnPropertyChanged();
+                ReloadChannels();
+            }
+        }
+
+        private List<Channel>? _channels;
+        public List<Channel>? Channels
+        {
+            get => _channels;
+            set
+            {
+                _channels = value;
+                OnPropertyChanged();
+            }
+        }
+
+        #endregion
+
+        #region Commands
+
+        private ActionCommand? _reloadCommand;
+        public ActionCommand ReloadCommand => _reloadCommand ??= new ActionCommand(Reload);
+
+        private ActionCommand? _savePinsCommand;
+        public ActionCommand SavePinsCommand => _savePinsCommand ??= new ActionCommand(SavePins);
+
+        private ActionCommand? _saveLedCountsCommand;
+        public ActionCommand SaveLedCountsCommand => _saveLedCountsCommand ??= new ActionCommand(SaveLedCounts);
+
+        #endregion
+
+        #region Constructors
+
+        public MainWindowViewModel()
+        {
+            Reload();
+        }
+
+        #endregion
+
+        #region Methods
+
+        private void Reload()
+        {
+            if (Devices != null)
+                foreach (PicoPiSDK sdk in Devices) sdk.Dispose();
+
+            Devices = DeviceList.Local.GetHidDevices(PicoPiSDK.VENDOR_ID, PicoPiSDK.HID_BULK_CONTROLLER_PID).Select(d => new PicoPiSDK(d)).ToList();
+            SelectedDevice = Devices.FirstOrDefault();
+        }
+
+        private void ReloadChannels()
+        {
+            Channels = SelectedDevice?.Channels.Select(c => new Channel(c.channel, c.pin, c.ledCount)).ToList();
+        }
+
+        private void SavePins()
+        {
+            if (Channels == null) return;
+
+            try
+            {
+                SelectedDevice?.SetPins(Channels.Select(c => (c.Index, c.Pin)).ToArray());
+                MessageBox.Show("Pins saved!\r\nRestart/Reconnect the device for the changes to take effect.", "Pins", MessageBoxButton.OK);
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"Failed saving pins:\r\n{ex.StackTrace}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+            }
+        }
+
+        private void SaveLedCounts()
+        {
+            if (Channels == null) return;
+
+            try
+            {
+                SelectedDevice?.SetLedCounts(Channels.Select(c => (c.Index, c.LedCount)).ToArray());
+                MessageBox.Show("Led-counts saved!", "Led-counts", MessageBoxButton.OK);
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"Failed saving led-counts:\r\n{ex.StackTrace}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+            }
+        }
+
+        #endregion
+
+        #region PropertyChanged
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+            => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+
+        #endregion
+    }
+}

PicoPiConfig/PicoPiConfig.csproj

@@ -0,0 +1,31 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net5.0-windows</TargetFramework>
+    <UseWPF>true</UseWPF>
+    <LangVersion>latest</LangVersion>
+    <Nullable>enable</Nullable>
+
+    <OutputPath>..\build\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <DefineConstants>$(DefineConstants);TRACE;DEBUG</DefineConstants>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <NoWarn>$(NoWarn);CS1591;CS1572;CS1573</NoWarn>
+    <DefineConstants>$(DefineConstants);RELEASE</DefineConstants>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="HidSharp" Version="2.1.0" />
+  </ItemGroup>
+
+</Project>

PicoPiConfig/PicoPiConfig.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31025.194
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PicoPiConfig", "PicoPiConfig.csproj", "{EF9724FB-E2EE-4590-B3D2-3FE683DCA0D6}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{EF9724FB-E2EE-4590-B3D2-3FE683DCA0D6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EF9724FB-E2EE-4590-B3D2-3FE683DCA0D6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EF9724FB-E2EE-4590-B3D2-3FE683DCA0D6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EF9724FB-E2EE-4590-B3D2-3FE683DCA0D6}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {62E26A26-66C1-4416-A1E5-F53902E13E17}
+	EndGlobalSection
+EndGlobal

PicoPiConfig/PicoPiSDK.cs

@@ -0,0 +1,201 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using HidSharp;
+
+//TODO DarthAffe 24.04.2021: Replace with RGB.NET PicoPiSDK once it's merged to main
+namespace RGB.NET.Devices.PicoPi
+{
+    public class PicoPiSDK : IDisposable
+    {
+        #region Constants
+
+        public const int VENDOR_ID = 0x1209;
+        public const int HID_BULK_CONTROLLER_PID = 0x2812;
+
+        private const byte COMMAND_CHANNEL_COUNT = 0x01;
+        private const byte COMMAND_LEDCOUNTS = 0x0A;
+        private const byte COMMAND_PINS = 0x0B;
+        private const byte COMMAND_ID = 0x0E;
+        private const byte COMMAND_VERSION = 0x0F;
+        private const byte COMMAND_UPDATE = 0x01;
+        private const byte COMMAND_UPDATE_BULK = 0x02;
+
+        #endregion
+
+        #region Properties & Fields
+
+        private readonly HidDevice _hidDevice;
+        private readonly HidStream _hidStream;
+
+        private readonly byte[] _hidSendBuffer;
+        private readonly byte[] _bulkSendBuffer;
+
+        private int _bulkTransferLength = 0;
+
+        public string Id { get; }
+        public int Version { get; }
+        public IReadOnlyList<(int channel, int ledCount, int pin)> Channels { get; }
+
+        #endregion
+
+        #region Constructors
+
+        public PicoPiSDK(HidDevice device)
+        {
+            this._hidDevice = device;
+
+            _hidSendBuffer = new byte[_hidDevice.GetMaxOutputReportLength() - 1];
+
+            _hidStream = _hidDevice.Open();
+
+            Id = GetId();
+            Version = GetVersion();
+            Channels = new ReadOnlyCollection<(int channel, int ledCount, int pin)>(GetChannels().ToList());
+
+            _bulkSendBuffer = new byte[(Channels.Sum(c => c.ledCount + 1) * 3) + 5];
+        }
+
+        #endregion
+
+        #region Methods
+
+        public void SetLedCounts(params (int channel, int ledCount)[] ledCounts)
+        {
+            byte[] data = new byte[Channels.Count + 2];
+            data[1] = COMMAND_LEDCOUNTS;
+            foreach ((int channel, int ledCount, _) in Channels)
+                data[channel + 1] = (byte)ledCount;
+
+            foreach ((int channel, int ledCount) in ledCounts)
+                data[channel + 1] = (byte)ledCount;
+
+            SendHID(data);
+        }
+
+        public void SetPins(params (int channel, int pin)[] pins)
+        {
+            byte[] data = new byte[Channels.Count + 2];
+            data[1] = COMMAND_PINS;
+            foreach ((int channel, _, int pin) in Channels)
+                data[channel + 1] = (byte)pin;
+
+            foreach ((int channel, int pin) in pins)
+                data[channel + 1] = (byte)pin;
+
+            SendHID(data);
+        }
+
+        private string GetId()
+        {
+            SendHID(0x00, COMMAND_ID);
+            return ConversionHelper.ToHex(Read().Skip(1).Take(8).ToArray());
+        }
+
+        private int GetVersion()
+        {
+            SendHID(0x00, COMMAND_VERSION);
+            return Read()[1];
+        }
+
+        private IEnumerable<(int channel, int ledCount, int pin)> GetChannels()
+        {
+            SendHID(0x00, COMMAND_CHANNEL_COUNT);
+            int channelCount = Read()[1];
+
+            for (int i = 1; i <= channelCount; i++)
+            {
+                SendHID(0x00, (byte)((i << 4) | COMMAND_LEDCOUNTS));
+                int ledCount = Read()[1];
+
+                SendHID(0x00, (byte)((i << 4) | COMMAND_PINS));
+                int pin = Read()[1];
+
+                yield return (i, ledCount, pin);
+            }
+        }
+
+        public void SendHidUpdate(in Span<byte> data, int channel, int chunk, bool update)
+        {
+            if (data.Length == 0) return;
+
+            Span<byte> sendBuffer = _hidSendBuffer;
+            sendBuffer[0] = 0x00;
+            sendBuffer[1] = (byte)((channel << 4) | COMMAND_UPDATE);
+            sendBuffer[2] = update ? (byte)1 : (byte)0;
+            sendBuffer[3] = (byte)chunk;
+            data.CopyTo(sendBuffer.Slice(4, data.Length));
+            SendHID(_hidSendBuffer);
+        }
+
+        private void SendHID(params byte[] data) => _hidStream.Write(data);
+
+        private byte[] Read() => _hidStream.Read();
+
+        public void Dispose()
+        {
+            _hidStream.Dispose();
+        }
+
+        #endregion
+    }
+
+    /// <summary>
+    /// Contains helper methods for converting things.
+    /// </summary>
+    public static class ConversionHelper
+    {
+        #region Methods
+
+        // Source: https://web.archive.org/web/20180224104425/https://stackoverflow.com/questions/623104/byte-to-hex-string/3974535
+        /// <summary>
+        /// Converts an array of bytes to a HEX-representation.
+        /// </summary>
+        /// <param name="bytes">The array of bytes.</param>
+        /// <returns>The HEX-representation of the provided bytes.</returns>
+        public static string ToHex(params byte[] bytes)
+        {
+            char[] c = new char[bytes.Length * 2];
+
+            for (int bx = 0, cx = 0; bx < bytes.Length; ++bx, ++cx)
+            {
+                byte b = ((byte)(bytes[bx] >> 4));
+                c[cx] = (char)(b > 9 ? b + 0x37 : b + 0x30);
+
+                b = ((byte)(bytes[bx] & 0x0F));
+                c[++cx] = (char)(b > 9 ? b + 0x37 : b + 0x30);
+            }
+
+            return new string(c);
+        }
+
+        // Source: https://web.archive.org/web/20180224104425/https://stackoverflow.com/questions/623104/byte-to-hex-string/3974535
+        /// <summary>
+        /// Converts the HEX-representation of a byte array to that array.
+        /// </summary>
+        /// <param name="hexString">The HEX-string to convert.</param>
+        /// <returns>The correspondending byte array.</returns>
+        public static byte[] HexToBytes(ReadOnlySpan<char> hexString)
+        {
+            if ((hexString.Length == 0) || ((hexString.Length % 2) != 0))
+                return Array.Empty<byte>();
+
+            byte[] buffer = new byte[hexString.Length / 2];
+            for (int bx = 0, sx = 0; bx < buffer.Length; ++bx, ++sx)
+            {
+                // Convert first half of byte
+                char c = hexString[sx];
+                buffer[bx] = (byte)((c > '9' ? (c > 'Z' ? ((c - 'a') + 10) : ((c - 'A') + 10)) : (c - '0')) << 4);
+
+                // Convert second half of byte
+                c = hexString[++sx];
+                buffer[bx] |= (byte)(c > '9' ? (c > 'Z' ? ((c - 'a') + 10) : ((c - 'A') + 10)) : (c - '0'));
+            }
+
+            return buffer;
+        }
+
+        #endregion
+    }
+}