secs4net

Project Description

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

Getting started

Install Nuget package

> dotnet add package Secs4Net

Configure via .NET dependency injection

Sample code reference

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 an unmanaged array 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 the 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()))));

Change the Item value (restricted)

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 decoded by PipeDecoder also uses 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 length of the max encoded bytes 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.