jslib_test_snippet.cs

gistfile1.cs

using System.Runtime.InteropServices;
using Unity.Entities;

public class ByteArraySystem : SystemBase
{
    [DllImport("__Internal")]
    private static extern void binaryInit(byte[] test, int size);

    [DllImport("__Internal")]
    private static extern void consoleLog(byte val);

    byte[] byteArray = new byte[2];
    float t = 0;

    protected override void OnCreate()
    {
        binaryInit(byteArray, byteArray.Length);
    }

    protected override void OnUpdate()
    {
        t += Time.DeltaTime;
        if(t >= 1f)
        {
            t = 0;
            byteArray[0]++;
            if (byteArray[0] >= 200)
                byteArray[0] = 0;
        }
        consoleLog(byteArray[1]);
    }
}