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using HidApi; |
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using System.Text; |
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namespace UsbHidTestApp_libusb; |
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internal class Program |
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{ |
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private static HidApi.Device? _device; |
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private static bool _continue; |
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private static Thread? readThread; |
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private static IEnumerable<HidApi.DeviceInfo>? lastDevices; |
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private static StringComparer stringComparer = StringComparer.OrdinalIgnoreCase; |
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public static bool applicationQuitRequested { get; private set; } |
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static void Main(string[] args) |
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{ |
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while (applicationQuitRequested == false) |
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{ |
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Console.WriteLine($"----- USB HID PROTOCOL TEST APP -----"); |
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Console.WriteLine($"Command list:"); |
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Console.WriteLine($"l = list devices"); |
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Console.WriteLine($"c = connect"); |
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Console.WriteLine($"q = quit"); |
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var key = Console.ReadKey(); |
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switch (key.Key) |
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{ |
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// list devices |
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case ConsoleKey.L: |
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var hidDevices = Hid.Enumerate(); |
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Console.WriteLine($"Following HID devices were found: {Environment.NewLine}"); |
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foreach (var deviceInfo in hidDevices) |
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{ |
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bool newDevice = false; |
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var device = deviceInfo.ConnectToDevice(); |
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if (lastDevices?.Where(x => x.Path == device.GetDeviceInfo().Path).Any() == false) |
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{ |
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Console.ForegroundColor = ConsoleColor.Green; |
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newDevice = true; |
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} |
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Console.WriteLine($"-- VendorId: 0x{deviceInfo.VendorId.ToString("X4")}, ProductId: 0x{deviceInfo.ProductId.ToString("X4")}, Manufacturer: {deviceInfo.ManufacturerString}, Path:"); |
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Console.WriteLine($" {deviceInfo.Path}"); |
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if (newDevice) |
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{ |
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Console.ForegroundColor = ConsoleColor.White; |
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} |
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} |
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lastDevices = hidDevices; |
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break; |
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// connect |
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case ConsoleKey.C: |
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Console.Write($"Write device vendor id as hex: "); |
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string? vendorIdString = Console.ReadLine(); |
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ushort vendorId; |
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if (vendorIdString == null || |
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vendorIdString == "" || |
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ushort.TryParse(vendorIdString, System.Globalization.NumberStyles.HexNumber, null, out vendorId) == false) |
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{ |
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Console.WriteLine($"Invalid vendor ID entered."); |
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break; |
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} |
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Console.Write($"Write product vendor id as hex: "); |
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string? productIdString = Console.ReadLine(); |
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ushort productId; |
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if (productIdString == null || |
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productIdString == "" || |
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ushort.TryParse(productIdString, System.Globalization.NumberStyles.HexNumber, null, out productId) == false) |
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{ |
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Console.WriteLine($"Invalid product ID entered."); |
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break; |
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} |
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_device = new Device(vendorId, productId); |
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if (_device == null) |
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{ |
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Console.WriteLine("Could not find device."); |
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break; |
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} |
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_continue = true; |
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readThread = new Thread(Read); |
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readThread.Start(); |
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var devInfo = _device.GetDeviceInfo(); |
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Console.WriteLine($"Connected to device VendorId: 0x{devInfo.VendorId.ToString("X4")}, ProductId: 0x{devInfo.ProductId.ToString("X4")}, Manufacturer: {devInfo.ManufacturerString}."); |
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Console.WriteLine("Write 'quit' to end communication."); |
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while (_continue) |
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{ |
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var message = Console.ReadLine(); |
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if (stringComparer.Equals("quit", message)) |
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{ |
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_continue = false; |
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} |
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else |
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{ |
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byte[] msgBytes = Encoding.ASCII.GetBytes(message!); |
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List<byte> listBytes = new List<byte>(); |
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listBytes.Add((byte)' '); // temp fix for first sign wrong |
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listBytes.AddRange(msgBytes); |
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listBytes.Add((byte)'\n'); |
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_device.Write(listBytes.ToArray()); |
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} |
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} |
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readThread.Join(); |
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readThread = null; |
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_device.Dispose(); // "close" |
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Console.WriteLine("Closed connection to device."); |
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break; |
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// quit |
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case ConsoleKey.Q: |
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applicationQuitRequested = true; |
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break; |
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default: |
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Console.WriteLine($"{Environment.NewLine}Did not recognize key.. {Environment.NewLine}"); |
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break; |
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} |
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} |
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Hid.Exit(); //Call at the end of your program |
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} |
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public static void Read() |
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{ |
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while (_continue) |
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{ |
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try |
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{ |
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ReadOnlySpan<byte> readData = null; |
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if(_device != null) |
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{ |
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readData = _device.Read(1000); |
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} |
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else |
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{ |
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Thread.Sleep(20); |
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} |
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if (readData != null && readData.IsEmpty == false) |
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{ |
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string print = Encoding.UTF8.GetString(readData); |
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//print = print.Replace("\r", "").Replace("\n", ""); // Newline Mode: none |
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//print = print.Replace("\r", ""); // Newline Mode: only print \n |
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//print = print.Replace("\0", ""); // delete null chars |
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if (String.IsNullOrEmpty(print) == false) |
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{ |
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Console.WriteLine(print); |
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} |
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} |
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} |
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catch (HidException hidex) |
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{ |
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Console.WriteLine($"Got HidException, device likely disconnected: {hidex}"); |
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Console.WriteLine($"Write 'quit' to end"); |
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_continue = false; |
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} |
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} |
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} |
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} |
Jonas Arnold
3 years ago