public async void ServerHandlesRequestFire()
{
// Arrange
var serialPort = new FakeSerialPort();
var server = new ModbusRtuServer(unitIdentifier: 1);
server.Start(serialPort);
var client = new ModbusRtuClient();
client.Connect(serialPort);
await Task.Run(() =>
{
var data = Enumerable.Range(0, 20).Select(i => (float)i).ToArray();
var sw = Stopwatch.StartNew();
var iterations = 10000;
for (int i = 0; i < iterations; i++)
{
client.WriteMultipleRegisters(0, 0, data);
}
var timePerRequest = sw.Elapsed.TotalMilliseconds / iterations;
_logger.WriteLine($"Time per request: {timePerRequest * 1000:F0} us. Frequency: {1 / timePerRequest * 1000:F0} requests per second.");
client.Close();
});
server.Stop();
// Assert
}
static void DoServerWork(ModbusRtuServer server)
{
var random = new Random();
// Option A: normal performance version, more flexibility
/* get buffer in standard form (Span<short>) */
var registers = server.GetHoldingRegisters();
registers.SetLittleEndian(address: 5, random.Next());
// Option B: high performance version, less flexibility
/* interpret buffer as array of bytes (8 bit) */
var byte_buffer = server.GetHoldingRegisterBuffer <byte>();
byte_buffer[20] = (byte)(random.Next() >> 24);
/* interpret buffer as array of shorts (16 bit) */
var short_buffer = server.GetHoldingRegisterBuffer <short>();
short_buffer[30] = (short)(random.Next(0, 100) >> 16);
/* interpret buffer as array of ints (32 bit) */
var int_buffer = server.GetHoldingRegisterBuffer <int>();
int_buffer[40] = random.Next(0, 100);
}
/// <summary>
/// 启动仿真服务
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void but_open_server_Click(object sender, EventArgs e)
{
try
{
if (txt_content.Text.Contains("小技巧"))
{
txt_content.Text = string.Empty;
}
var PortName = cb_portNameSend_server.Text.ToString();
var BaudRate = int.Parse(cb_baudRate.Text.ToString());
var DataBits = int.Parse(txt_dataBit.Text.ToString());
var StopBits = (StopBits)int.Parse(txt_stopBit.Text.ToString());
var parity = cb_parity.SelectedIndex == 0 ? Parity.None : (cb_parity.SelectedIndex == 1 ? Parity.Odd : Parity.Even);
server?.Stop();
server = new ModbusRtuServer(PortName, BaudRate, DataBits, StopBits, parity);
server.Start();
AppendText("开启仿真服务");
but_server_open.Enabled = false;
but_server_close.Enabled = true;
cb_portNameSend_server.Enabled = false;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
static void DoServerWork(ModbusRtuServer server)
{
var random = new Random();
// interpret buffer as array of bytes (8 bit)
var byte_buffer = server.GetHoldingRegisterBuffer <byte>();
byte_buffer[20] = (byte)(random.Next() >> 24);
// interpret buffer as array of shorts (16 bit)
var short_buffer = server.GetHoldingRegisterBuffer <short>();
short_buffer[30] = (short)(random.Next(0, 100) >> 16);
// interpret buffer as array of ints (32 bit)
var int_buffer = server.GetHoldingRegisterBuffer <int>();
int_buffer[40] = random.Next(0, 100);
}
static async Task Main(string[] args)
{
/* Modbus RTU uses a COM port for communication. Therefore, to run
* this sample, you need to make sure that there are real or virtual
* COM ports available. The easiest way is to install one of the free
* COM port bridges available in the internet. That way, the Modbus
* server can connect to e.g. COM1 which is virtually linked to COM2,
* where the client is connected to.
*
* When you only want to use the client and communicate to an external
* Modbus server, simply remove all server related code parts in this
* sample and connect to real COM port using only the client.
*/
/* define COM ports */
var serverPort = "COM1";
var clientPort = "COM2";
/* prepare dependency injection */
var services = new ServiceCollection();
ConfigureServices(services);
/* create types */
var provider = services.BuildServiceProvider();
var loggerFactory = provider.GetRequiredService <ILoggerFactory>();
var serverLogger = loggerFactory.CreateLogger("Server");
var clientLogger = loggerFactory.CreateLogger("Client");
/* create Modbus RTU server and client */
var server = new ModbusRtuServer(unitIdentifier: 1);
var client = new ModbusRtuClient();
/* run Modbus RTU server */
var cts = new CancellationTokenSource();
var task_server = Task.Run(async() =>
{
server.Start(serverPort);
serverLogger.LogInformation("Server started.");
while (!cts.IsCancellationRequested)
{
// lock is required to synchronize buffer access between this application and the Modbus client
lock (server.Lock)
{
DoServerWork(server);
}
// update server buffer content once per second
await Task.Delay(TimeSpan.FromSeconds(1));
}
server.Dispose();
}, cts.Token);
/* run Modbus RTU client */
var task_client = Task.Run(() =>
{
client.Connect(clientPort);
try
{
DoClientWork(client, clientLogger);
}
catch (Exception ex)
{
clientLogger.LogError(ex.Message);
}
client.Close();
Console.WriteLine("Tests finished. Press any key to continue.");
Console.ReadKey(true);
});
// wait for client task to finish
await task_client;
// stop server
cts.Cancel();
await task_server;
server.Stop();
serverLogger.LogInformation("Server stopped.");
}
static async Task Main(string[] args)
{
/* Modbus RTU uses a COM port for communication. Therefore, to run
* this sample, you need to make sure that there are real or virtual
* COM ports available. The easiest way is to install one of the free
* COM port bridges available in the internet. That way, the Modbus
* server can connect to e.g. COM1 which is virtually linked to COM2,
* where the client is connected to.
*
* When you only want to use the client and communicate to an external
* Modbus server, simply remove all server related code parts in this
* sample and connect to real COM port using only the client.
*/
/* define COM ports */
var serverPort = "COM1";
var clientPort = "COM2";
/* create logger */
var loggerFactory = LoggerFactory.Create(loggingBuilder =>
{
loggingBuilder.SetMinimumLevel(LogLevel.Debug);
loggingBuilder.AddConsole();
});
var serverLogger = loggerFactory.CreateLogger("Server");
var clientLogger = loggerFactory.CreateLogger("Client");
/* create Modbus RTU server */
using var server = new ModbusRtuServer(unitIdentifier: 1)
{
// see 'RegistersChanged' event below
EnableRaisingEvents = true
};
/* subscribe to the 'RegistersChanged' event (in case you need it) */
server.RegistersChanged += (sender, registerAddresses) =>
{
// the variable 'registerAddresses' contains a list of modified register addresses
};
/* create Modbus RTU client */
var client = new ModbusRtuClient();
/* run Modbus RTU server */
var cts = new CancellationTokenSource();
var task_server = Task.Run(async() =>
{
server.Start(serverPort);
serverLogger.LogInformation("Server started.");
while (!cts.IsCancellationRequested)
{
// lock is required to synchronize buffer access between this application and the Modbus client
lock (server.Lock)
{
DoServerWork(server);
}
// update server register content once per second
await Task.Delay(TimeSpan.FromSeconds(1));
}
}, cts.Token);
/* run Modbus RTU client */
var task_client = Task.Run(() =>
{
client.Connect(clientPort);
try
{
DoClientWork(client, clientLogger);
}
catch (Exception ex)
{
clientLogger.LogError(ex.Message);
}
client.Close();
Console.WriteLine("Tests finished. Press any key to continue.");
Console.ReadKey(true);
});
// wait for client task to finish
await task_client;
// stop server
cts.Cancel();
await task_server;
server.Stop();
serverLogger.LogInformation("Server stopped.");
}
