Example #1
0
        /*
         *      /// <summary>
         *      /// Requests all 6 voltage measurements for the specified FEB HDMI channel.
         *      /// <para>The voltage measurement is returned on onVoltageChanged event</para>
         *      /// <para>onVoltageChanged returns double[6] showing all 6 HDMI values in the order Trim0-Trim3, Bias, LED</para>
         *      /// <para>If inTestMode=true then onVoltageChanged is asserted with VoltageChangedEventArgs.Voltage = voltageDefaultValue</para>
         *      /// </summary>
         *      /// <param name="channelNumber">the integer number 0-15, of the FEB HDMI channel to read</param>
         *      internal void GetVoltage(int HDMIchannelNumber = 0)
         *      {
         *          if (inTestMode)
         *          {
         *              VoltageChangedEventsArgs VoltArgs = new VoltageChangedEventsArgs();
         *              if (OnVoltageChanged != null)
         *                  VoltArgs.HDMIchannel = HDMIchannelNumber;
         *              OnVoltageChanged(this, VoltArgs);
         *              return;
         *          }
         *
         *          if (HDMIchannelNumber < 0 || HDMIchannelNumber > 15)
         *              throw new Exception(scopeName + ": GetVoltage. channel number " + HDMIchannelNumber + " is out of bounds. Must be 0-15");
         *
         *          // For assistance with DMM VISA See:
         *          //https://www.keysight.com/upload/cmc_upload/All/iols_15_5_visa_users_guide.pdf
         *          //https://literature.cdn.keysight.com/litweb/pdf/34972-90001.pdf?id=1837993
         *          //https://www.keysight.com/upload/cmc_upload/All/34970-90003_users.pdf * best for programming
         *          //http://instructor.physics.lsa.umich.edu/adv-labs/Tools_Resources/HP%2034970A%20quick%20reference%20guide.pdf
         *          //http://literature.cdn.keysight.com/litweb/pdf/5989-6338EN.pdf
         *          string range = FEB.HDMIs[HDMIchannelNumber].Trim0.myDmmId + ":" + FEB.HDMIs[HDMIchannelNumber].LED.myDmmId;
         *
         *          /*           bool useAsync = false;
         *                     if (useAsync == true) //use asyncornous read and write. This worked for the Tek scope but fails now that the DMM is reading ranges.
         *                     {
         *                         write("MEASure:VOLTage:DC? (@" + range + ")\n"); // AUTO ,MAX, (@101)"); //,316)");
         *                         WriteComplete += readVoltage;
         *                     }
         *                     else //use Sync read and write Added Jan 2017 Stephen to avoid errors with ivi.VISA
         *                     { */
        /*
         * simpleReadWrite("MEASure:VOLTage:DC? (@" + range + ")\n");
         * //   }
         * }
         */

        private static void simpleReadWrite(string command)
        {
            try
            {
                string textToWrite = ReplaceCommonEscapeSequences(command);
                mbSession.RawIO.Write(textToWrite);

                string DMMresponse = "";
                int    timeout     = 0;

                while (DMMresponse == "" && timeout < 100)
                {
                    Application.DoEvents();
                    DMMresponse = InsertCommonEscapeSequences(mbSession.RawIO.ReadString());
                    timeout++;
                }
                Console.WriteLine($"simpleReadWrite timeout = {timeout}. DMM response is <{DMMresponse}>");
                if (DMMresponse != "")
                {
                    readArgs e = new readArgs();
                    e.text = InsertCommonEscapeSequences(DMMresponse);
                    parseVoltage(null, e);
                }
            }
            catch (Exception exp)
            {
                MessageBox.Show(exp.Message);
            }
        }
Example #2
0
 private static void OnReadComplete(IVisaAsyncResult result)
 {
     try
     {
         string responseString = mbSession.RawIO.EndReadString(result);
         if (ReadComplete != null)
         {
             readArgs e = new readArgs();
             e.text = InsertCommonEscapeSequences(responseString);
             ReadComplete(null, e);
         }
     }
     catch (Exception exp)
     {
         if (ReadComplete != null)
         {
             readArgs e = new readArgs();
             e.text = InsertCommonEscapeSequences(scopeName + ": OnReadComplete failed. " + exp.Message);
             ReadComplete(null, e);
         }
         else
         {
             //throw new Exception(scopeName + ": OnReadComplete failed. " + exp.Message);
         }
     }
 }
Example #3
0
        private static void parseVoltage(object sender, readArgs e)
        {
            VoltageChangedEventsArgs VoltArgs = new VoltageChangedEventsArgs();

            try
            {
                ReadComplete -= parseVoltage;
                //expected result = :MEASUREMENT:MEAS1:VALUE 3.5414E0\n
                string   rawResponse = RemoveCommonEscapeSequences(e.text);
                string[] response    = rawResponse.Split(',');
                VoltArgs.Voltage = new double[response.Length];
                for (int i = 0; i < response.Length; i++)
                {
                    VoltArgs.Voltage[i] = double.Parse(response[i]);
                }
                VoltArgs.isValid = (response.Length > 0); // 9.9E37 is the scope return value for invalid measurement.
            }
            catch (Exception arg)
            {
                VoltArgs.isValid = false;
            }
            OnVoltageChanged?.Invoke(null, VoltArgs);
        }