using System;
using System.Text;

using Ivi.Visa.Interop;

namespace Multimeasure3458CSharpVISACOM
{
    class Program
    {
        static void Main(string[] args)
        {
            ResourceManager rm = new ResourceManager();
            FormattedIO488 fmio = new FormattedIO488();

            string address = "GPIB0::25::INSTR";

            int numReadings = 10;

            // Open path to DMM
            fmio.IO = (IMessage)rm.Open(address, AccessMode.NO_LOCK, 0, "");
            
            //max speed readings
            fmio.IO.Clear();
            fmio.WriteString("reset", true);
            fmio.WriteString("end on", true);
            fmio.WriteString("preset norm", true);
            fmio.WriteString("nplc 1", true);
            fmio.WriteString("oformat dreal", true);
            fmio.WriteString("nrdgs " + numReadings.ToString(), true);
  
            //each reading is 8 bytes
            byte[] rawData = fmio.IO.Read(8 * numReadings);

            Console.WriteLine("10 readings:\r\n");

            for (int i = 0; i < numReadings; i++)
            {
                Console.WriteLine("\t{0}\r\n",
                    System.BitConverter.ToDouble(swapDouble(rawData, i * 8, 8), 0));
            }

            //close connection to the 3458A
            fmio.IO.Close();

            Console.WriteLine("Press any key to exit...");
            Console.Read();
        }

        /// <summary>
        /// The 3458A uses a processor that results in big endian data, your PC is little endian, we need to swap the bytes
        /// </summary>
        static byte[] swapDouble(byte[] rawData, int index, int numberBytes)
        {
            byte[] newData = new byte[numberBytes];

            for (int i = 0; i < numberBytes; i++)
            {
                newData[i] = rawData[index + numberBytes - i - 1];
            }
            return newData;
        }
    }
}