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

1. Install nuget package

   dotnet add package Secs4Net --version 2.0.0-rc4.0

2. 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
    }

3. 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
    }

4. 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); 
    };

5. 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()))));

6. Item is mutable with restrict.

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

   That means you can only overwrite values on existing memory. String Item is still immutable, coz C# string is immutable as well.

7. Reuse pooled 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.