Scripting

This page will describe how to use the scripting feature. To use the feature emDrive Configurator needs to have an open connection with an emDrive device. Scripts are written in C# (.cs files). To open the Script Window navigate to the menu bar, Device > Script.

User interface

The Browse button will open a File Open window to choose the script file. Once a file is loaded the file path will be displayed in the textbox next to it.

The Run script button will start the execution of the script.

Stop will stop the execution of the script.

The Script has infinite loop checkbox is used for scripts with long-running loops. This will automatically get set when the file is loaded if it contains the Cancellation Token implementation.

Scripts that don't have long-running loops can be added to Shortcuts by selecting the desired shortcut in the drop-down menu and clicking the Set button.

The window also comes with a simple script editor that can be opened with the Edit script.

Below these controls is the Command Overview section which will be populated when certain API calls are made.

To the right of it is the Log section which will print text if the Logging API calls are made.

Scripting API

The following section will list and describe all of the available API calls.

Script - Watch Interoperability

In version 1.13.0.0 script - watch interoperability API calls were added.

WatchScriptObject class

The WatchScriptObject class uses the API calls described below but is a more user-friendly approach to this functionality. Unless specified the index and subindex properties will be set automatically. index will always be 0xFFFF and subindex will increment from 0 onwards. If the user wishes to reset the subindex counter they must call the ResetSubIndexCounter method.

The TryToAddToWatch method will attempt to add the virtual object to Watch. See TryAddScriptEntryToWatch method for possible errors.

The TryToAddValueToWatch method will attempt to add the value to the already created virtual object in Watch. See TryAddScriptEntryValue method for possible errors.

public class WatchScriptObject
{
    // Properties
    public string Name { get; }
    public int NodeId { get; } // Default: 0
    public uint Index { get; } // Default: 0xFFFF
    public ushort SubIndex { get; }
    public ushort DataType { get; }
  
    // Constructors
    public WatchScriptObject(string name, ushort datatype);
    public WatchScriptObject(string name, ushort subindex, ushort datatype);
    public WatchScriptObject(string name, uint index, ushort subindex, ushort datatype);

    // Methods
    public bool TryToAddToWatch();
    public bool TryToAddValueToWatch(dynamic value);
    public static void ResetSubIndexCounter();
}

TryAddScriptEntryToWatch method

Attempts to create a new script virtual object in Watch with the specified name, nodeId, index, subindex, and datatype. Returns true if successful or false if failed.

public static bool TryAddScriptEntryToWatch(string name, int nodeId, uint index, ushort subindex, ushort datatype)

Fail reasons:

Object with specified nodeId, index and subindex already exists in Watch.

TryAddScriptEntryValue method

Attempts to write value to the script virtual object in Watch. Returns true if successful or false if failed.

public static bool TryAddScriptEntryValue(int nodeId, uint index, ushort subindex, dynamic value)

Fail reasons:

Object with specified nodeId, index and subindex does not exist in Watch.
Failed to convert value to the declared datatype.

TryGetLastWatchValue method

Attempts to get the last read value of the object specified with nodeId, index, subindex and saves it to value. Returns true if successful or false if failed.

public static bool TryGetWatchValue(int nodeId, uint index, ushort subindex, out double value)

Fail reasons:

Object with specified nodeId, index and subindex does not exist in Watch.
Failed to convert object value to type double.

Example file

Example file for Script - Watch Interoperability (also available as download)

/*
  Author:       Amadej Arnus
  Date:         2024-04-23
*/

using System;
using System.Windows.Forms;
using emDrive_Configurator;
using System.Threading;
using Timer = System.Threading.Timer;

using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.IO.Ports;
using System.Linq;
using System.Management;
using System.Text;
using System.Text.RegularExpressions;

public class Script
{
    // Prepare error string
    string err = string.Empty;

    // Create object that we will attempt to read from watch
    CO_Object HwMonitorUdc = new CO_Object(0x3071, 0x00);

    public void Main(CancellationToken cancellationToken)
    {
        // This will run the example for the WatchScriptObject
        ObjectBasedVersion(cancellationToken);

        // This will run the example for the API calls
        //ObjectBasedVersion(cancellationToken);
    }

    private void ObjectBasedVersion(CancellationToken cancellationToken)
    {
        // Create new objects for watch-script interoperability
        Procedure.WatchScriptObject intObject = new Procedure.WatchScriptObject("ScriptObject_Int32", 0x0004);
        Procedure.WatchScriptObject floatObject = new Procedure.WatchScriptObject("ScriptObject_Real32", 0x0008);

        // Add int object to watch
        if (intObject.TryToAddToWatch())
        {
            LogResult("ScriptObject_Int32 added to watch");
        }
        else
        {
            LogResult("ScriptObject_Int32 not added to watch");
        }

        // Add float object to watch
        if (floatObject.TryToAddToWatch())
        {
            LogResult("ScriptObject_Real32 added to watch");
        }
        else
        {
            LogResult("ScriptObject_Real32 not added to watch");
        }

        int i = 0;

        // Do the loop until cancellationToken is requested
        while (!cancellationToken.IsCancellationRequested)
        {
            double hwMonitorValue = 0;

            // Read last value of HwMonitorUdc object
            if (HwMonitorUdc.TryGetWatchValue(1, out hwMonitorValue))
            {
                i++;

                // Set new value to int and float objects
                if (!intObject.TryToAddValueToWatch(i))
                {
                    LogResult("Failed to write value to ScriptObject_Int32");
                }

                if (!floatObject.TryToAddValueToWatch(hwMonitorValue * 1.5))
                {
                    LogResult("Failed to write value to ScriptObject_Real32");
                }
            }
            // If not successful, log the error
            else
            {
                LogResult("Failed to get HwMonitorUdc value");
            }

            Procedure.Delay(200);
        }
    }

    private void ApiBasedVersion(CancellationToken cancellationToken)
    {
        // Add int object to watch
        if (TryAddScriptEntryToWatch("ScriptObject_Int32", 1, 0xFFFF, 0x01, datatype: 0x0004))
        {
            LogResult("ScriptObject_Int32 added to watch");
        }
        else
        {
            LogResult("ScriptObject_Int32 not added to watch");
        }

        // Add float object to watch
        if (TryAddScriptEntryToWatch("ScriptObject_Real32", 1, 0xFFFF, 0x02, datatype: 0x0008))
        {
            LogResult("ScriptObject_Real32 added to watch");
        }
        else
        {
            LogResult("ScriptObject_Real32 not added to watch");
        }

        int i = 0;

        // Do the loop until cancellationToken is requested
        while (!cancellationToken.IsCancellationRequested)
        {
            double hwMinutorValue = 0;

            // Read last value of HwMonitorUdc object
            if (TryGetWatchValue(1, 0x3071, 0x00, out hwMinutorValue))
            {
                i++;

                // Set new value to int and float objects
                if (!TryAddScriptEntryValue(1, 0xFFFF, 0x01, i))
                {
                    LogResult("Failed to write value to ScriptObject_Int32");
                }

                if (!TryAddScriptEntryValue(1, 0xFFFF, 0x02, hwMinutorValue * 1.5))
                {
                    LogResult("Failed to write value to ScriptObject_Real32");
                }
            }
            // If not successful, log the error
            else
            {
                LogResult("Failed to get HwMonitorUdc value");
            }

            Procedure.Delay(200);
        }
    }

    // The following methods are just wrappers to shorten the method calls
    bool TryAddScriptEntryToWatch(string name, int nodeId, uint index, ushort subindex, ushort datatype)
    {
        return Procedure.TryAddScriptEntryToWatch(name, nodeId, index, subindex, datatype);
    }
    bool TryAddScriptEntryValue(int nodeId, uint index, ushort subindex, dynamic value)
    {
        return Procedure.TryAddScriptEntryValue(nodeId, index, subindex, value);
    }
    bool TryGetWatchValue(int nodeId, uint index, ushort subindex, out double value)
    {
        return Procedure.TryGetWatchValue(nodeId, index, subindex, out value);
    }

    void LogResult(string LogString)
    {
        LogString = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + ": " + LogString;
        Procedure.Log(LogString);
    }
}

// CO_Object for readability
class CO_Object
{
    public uint index;
    public ushort subindex;
    public dynamic value;

    public CO_Object(uint index, ushort subindex)
    {
        this.index = index;
        this.subindex = subindex;
    }

    public bool TryGetWatchValue(int nodeId, out double value)
    {
        return Procedure.TryGetWatchValue(nodeId, index, subindex, out value);
    }
}