Instructions

1. Download the latest copy of the API DLL for your product

Visit the product page for your product and look for the C# API download, for example for the SMD4, visit the link below, and look for the downloads tab at the bottom of the page. https://arunmicro.com/products/smd4-stepper-motor-drive/

2. Install workloads for Visual Studio

To install a workload, or check what is installed, open Visual Studio and go to 'Tools > Get Tools and Features...'

Install the following workloads:

Use install or modify as required.

3. Creating the project 

Start the new project wizard (File > New > Project). Choose one of the following, then proceed to create your project as normal.

4. Referencing the API DLL file

The API DLL file needs to be referenced in your project. To do this go to:

• Solution Explorer
• Right click on the project, Add > Reference… 
• Choose ‘browse’ and select the DLL file you downloaded previously (example below shows SMD3 API)

Finally, click OK and the DLL will be added as a reference to your project.

5. Using the API

Example code (main.cpp), demonstrating connecting and moving the motor.

#include <windows.h>
#include <iostream>
#include <msclr/marshal_cppstd.h> // Include for string conversion

// Include CLR headers
#include <vcclr.h>
#pragma comment(lib, "mscoree.lib")

// Import the mscorlib library
#import "C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\mscorlib.tlb" raw_interfaces_only \
    high_property_prefixes("_get","_put","_putref") \
    rename("ReportEvent", "InteropServices_ReportEvent")

using namespace System;
using namespace msclr::interop; // Namespace for string conversion


// Main function to use the DLL in a native C++ application
int main() {
    try {
        // Create a instance of the class SMD3 from SMD3API namespace in the dll
        auto smd3 = gcnew SMD3API::SMD3();
        
        // Connect the SMD3 on COM3
        smd3->Connect("COM3 TEXT");

        // Start motor spinning clockwise
        smd3->MoveVelocity("+");        

        // Wait for user before stopping motor
        std::cout << "Press Enter to stop motor" << std::endl;
        std::cin.get(); 
        smd3->Stop();
    }
    catch (Exception^ ex) {
        // Convert System::String^ to std::string
        std::string errorMessage = marshal_as<std::string>(ex->Message);
        std::cerr << "Exception: " << errorMessage << std::endl;
    }
    return 0;
}