secs4net

Project Description

SECS-II/HSMS-SS/GEM implementation on .NET. This library provide easy way to communicate with SEMI standard compatible device.

Getting started

Install nuget package

> dotnet add package Secs4Net

Configure .NET dependency injection

	public void ConfigureServices(IServiceCollection services)
	{
		// "secs4net" configuration section in the appsettings.json
		//  "secs4net": {
		//    "DeviceId": 0,
		//    "IsActive": true,
		//    "IpAddress": "127.0.0.1",
		//    "Port": 5000
		//  }  
		services.AddSecs4Net<DeviceLogger>(Configuration); 
	}

	class DeviceLogger : ISecsGemLogger
	{
		// implement ISecsGemLogger methods
	}

Basic usage

	try
	{
		var s3f17 = new SecsMessage(3, 17)
		{
			Name = "CreateProcessJob",
			SecsItem = L(
				U4(0),
				L(
					L(
						A("Id"),
						B(0x0D),
						L(
							A("carrier id"),
							L(
								U1(1)),
							L(
								U1(1),
								A("recipe"),
								L()),
							Boolean(true),
							L()))))
		};

		//access list
		s3f17.SecsItem[1][0][0] == A("Id"); 

		foreach(var item in s3f17.SecsItem[1][0][2].Items)
		{

		}
	
		//access unmanaged arry item
		byte b2 = s3f17.SecsItem[0].FirstValue<byte>(); // with different type
		s3f17.SecsItem[0].FirstValue<byte>() = 0; // change original value 
		byte b3 = s3f17.SecsItem[0].GetFirstValueOrDefault<byte>(fallbackValueWhenItemIsEmpty); 
		Memory<byte> bytes = s3f17.SecsItem[0].GetMemory<byte>();

		// access string item
		string str = s3f17.SecsItem[1][0][0].GetString(); // str = "Id"

		//await secondary message
		var s3f18 = await secsGem.SendAsync(s3f17); 

		// process message with LINQ
		var query =
			from a in s3f18.SecsItem[3]
			select new {
				num = a.FirstValue<int>(),
			};
	}
	catch(SecsException)
	{
		// exception  when
		// T3 timeout
		// device reply SxF0
		// device reply S9Fx
	}

Handle primary messages

	await foreach (var e in secsGem.GetPrimaryMessageAsync(cancellationToken))
	{     
		using var primaryMsg = e.PrimaryMessage;
		//do something for primary message

		// reply secondary message to device
		using var secondaryMsg = new SecsMessage(...);
		await e.TryReplyAsync(secondaryMsg); 
	};

Creates Item via LINQ

	using static Secs4Net.Item;

	var s16f15 = 
		new SecsMessage(16, 15)
		{
			Name = "CreateProcessJob",
			SecsItem = L(
				U4(0),
				L(
					from pj in tx.ProcessJobs 
					select
					L(
						A(pj.Id),
						B(0x0D),
						L(
							from carrier in pj.Carriers 
							select
							L(
								A(carrier.Id),
								L(
									from slotInfo in carrier.SlotMap 
									select
									U1(slotInfo.SlotNo)))),
								L(
									U1(1),
									A(pj.RecipeId),
									L()),
								Boolean(true),
								L()))));

Modify Item in restrict.

Basic rule: The Item.Count has been fixed while the item was created.

You can only overwrite values on existing memory. String Item is immutable, coz C# string is immutable as well.

Reuse array for large item values

All unmanaged data Item can created from IMemoryOwner<T> or Memory<T>.

The following sample uses the implementation of IMemoryOwner<T> from Microsoft.Toolkit.HighPerformance that has been referenced internally by secs4net..

	var largeArrayOwner = MemoryOwner<int>.Allocate(size: 65535);
	
	// feed the value into largeArrayOwner.Memory or largeArrayOwner.Span
	FillLargeArray(largeArrayOwner.Memory);

	using var s6f11 = new SecsMessage(6, 11, replyExpected: false)
	{
		Name = "LargeDataEvent",
		SecsItem = L(
			L(
				I2(1121),
				A(""),
				I4(largeArrayOwner))), // create Item from largeArrayOwner
	};

	// apply using on received message as well. coz the item that decoded by PipeDecoder also using MemoryOwner<T> when the data array is big.
	using var s6f12 = await secsGem.SendAsync(s6f11);

IMemoryOwner<T>, Item and SecsMessage have implemented IDisposable don't forget to Dispose it when they don't need anymore. Otherwise, the array will not return to the pool till GC collects.

Since the max encoded bytes length in a single non-List Item was 16,777,215(3 bytes), we split raw data into separated items. In that case, creating the Items from sliced Memory<T> is more efficient.

LINQPad

If you like to use LINQPad to dump Item object in a simplified format, you probably need a custom dump method method. Adjust your LINQPad My Extensions file as follow

static object ToDump(object obj)
{
	var objType = obj.GetType();
	if (Type.GetType("Secs4Net.Item,Secs4Net") is { } itemType && objType.IsSubclassOf(itemType))
	{
		return Dump(obj);
	}
	return obj;
}

static object Dump(dynamic item)
{
	return (int)item.Format switch
	{
		(int)SecsFormat.List => 	new { item.Format, Values = OnDemandList(item),			},
		(int)SecsFormat.ASCII =>	new	{ item.Format, Values = item.GetString()			},	 
		(int)SecsFormat.JIS8 => 	new	{ item.Format, Values = item.GetString()			},
		(int)SecsFormat.Binary =>	new	{ item.Format, Values = OnDemandMemory<byte>(item)	},		 
		(int)SecsFormat.Boolean => 	new { item.Format, Values = OnDemandMemory<bool>(item)	},
		(int)SecsFormat.I8 => 		new	{ item.Format, Values = OnDemandMemory<long>(item)	},
		(int)SecsFormat.I1 => 		new	{ item.Format, Values = OnDemandMemory<sbyte>(item)	},
		(int)SecsFormat.I2 => 		new	{ item.Format, Values = OnDemandMemory<short>(item)	},
		(int)SecsFormat.I4 =>	 	new	{ item.Format, Values = OnDemandMemory<int>(item)	},
		(int)SecsFormat.F8 => 		new	{ item.Format, Values = OnDemandMemory<double>(item)},
		(int)SecsFormat.F4 => 		new	{ item.Format, Values = OnDemandMemory<float>(item)	},
		(int)SecsFormat.U8 => 		new	{ item.Format, Values = OnDemandMemory<ulong>(item)	},
		(int)SecsFormat.U1 => 		new	{ item.Format, Values = OnDemandMemory<byte>(item)	},
		(int)SecsFormat.U2 => 		new	{ item.Format, Values = OnDemandMemory<ushort>(item)},
		(int)SecsFormat.U4 => 		new	{ item.Format, Values = OnDemandMemory<uint>(item)	},
		_ => $"Unsupported Format: {item.Format}",
	};
	 
	static object OnDemandList(dynamic item) => Util.OnDemand($"[{item.Count}]", () => item.Items);
	static object OnDemandMemory<T>(dynamic item) => Util.OnDemand($"[{item.Count}]", () => item.GetMemory<T>());
}

// You can also define namespaces, non-static classes, enums, etc.
enum SecsFormat
{
	List = 0b_0000_00,
	Binary = 0b_0010_00,
	Boolean = 0b_0010_01,
	ASCII = 0b_0100_00,
	JIS8 = 0b_0100_01,
	I8 = 0b_0110_00,
	I1 = 0b_0110_01,
	I2 = 0b_0110_10,
	I4 = 0b_0111_00,
	F8 = 0b_1000_00,
	F4 = 0b_1001_00,
	U8 = 0b_1010_00,
	U1 = 0b_1010_01,
	U2 = 0b_1010_10,
	U4 = 0b_1011_00,
}