GPIB Code for Java

package com.gpib;

import java.util.List; import java.util.ArrayList; import java.util.Iterator; import com.gpib.JVisa; import com.gpib.JVisaException; import com.gpib.JVisaReturnNumber;

import visa.VisaLibrary.ViStatus; import visatype.VisatypeLibrary;

public class gpib { public String AGILENT_33220A= "USB0::0x0957::0x0407::MY44021621::0::INSTR"; public static void main(String[] args) { long resourceManager = -1, viStatus;

    /* Add values to the Array */
    List<Double> periodList = new ArrayList<Double>();        
    periodList.add(0.4612);  //130
    periodList.add(0.3157);  //190
    periodList.add(0.4285);  //140        
    periodList.add(0.4);     //150
    periodList.add(0.4615);
    periodList.add(0.545);
    periodList.add(0.4);
    periodList.add(0.545);
    periodList.add(0.285);
    periodList.add(0.3);
    periodList.add(0.4612);
    JVisa jVisa = null;        
    final String rmError = "JVisa Test Error: Could not close resource manager session.";
    
    for (Double period : periodList) {        	
    	
        try {
            System.out.println("Testing JVisa...");
            jVisa = new JVisa();

            System.out.println("Open Default Resource Manager.");
            viStatus = jVisa.openDefaultResourceManager();
            if (viStatus != VisatypeLibrary.VI_SUCCESS) {
                throw new JVisaException("Could not create session for resource manager.");
            }
            System.out.println("Get resource version.");
            resourceManager = jVisa.getVisaResourceManagerHandle();
            JVisaReturnNumber version = new JVisaReturnNumber(-1L);
            viStatus = jVisa.getResourceVersion(version);
            if (viStatus != VisatypeLibrary.VI_SUCCESS) {
                throw new JVisaException("Could not create session for resource manager.");
            }
            // Obtain the version.
            System.out.println(String.format("Version is 0x%08X.\r\n", version.returnNumber));


            String instrumentString = "USB0::0x0957::0x0407::MY44021621::0::INSTR";//TCPIP::138.67.34.158::INSTR";
            System.out.println(String.format("Open instrument session for %s.", instrumentString));
            viStatus = jVisa.openInstrument(instrumentString);
            if (viStatus != VisatypeLibrary.VI_SUCCESS) {
                throw new JVisaException(String.format("Could not open instrument session for %s.", instrumentString));
            }
            System.out.println("Success.\r\n");
            try{	            	
	            System.out.println ("Resetting the Device");
	            long result = jVisa.write("*RST");            
	            System.out.println(result);
	            Thread.currentThread().sleep(50);
				System.out.println ("Disable The output");
				//long result1 = jVisa.write(":OUTP:STAT 0");            
				//System.out.println(result1);
				Thread.currentThread().sleep(50);
				System.out.println ("Setting Freqency");
				long result2 = jVisa.write(":SOUR:FREQ:CW 1.1512 MHZ");            
				System.out.println(result2);
				Thread.currentThread().sleep(50);
				System.out.println ("Setting Amplitude");
				long result3 = jVisa.write(":SOUR:VOLT:LEV:IMM:AMPL 0.1 VPP");            
				System.out.println(result3);
				Thread.currentThread().sleep(50);
				System.out.println ("Setting Cycle Phase");
				long result4 = jVisa.write(":SOUR:BURS:PHAS 0 ");            
				System.out.println(result4);
				Thread.currentThread().sleep(50);
				System.out.println ("Setting Burst State");
				long result5 = jVisa.write(":SOUR:BURS:STAT 1");            
				System.out.println(result5);
				Thread.currentThread().sleep(50);
				System.out.println ("Setting Burst Cycles");
				long result6 = jVisa.write(":SOUR:BURS:NCYC 50000");            
				System.out.println(result6);
				Thread.currentThread().sleep(50);
				System.out.println ("Setting Burst Cycles");
				long result7 = jVisa.write(":SOUR:BURS:NCYC 50000");            
				System.out.println(result7);
				Thread.currentThread().sleep(50);
				System.out.println ("Setting Period to "+ period);
				long result8 = jVisa.write(":SOUR:BURS:INT:PER "+ period +" S");            
				System.out.println(result8);
				Thread.currentThread().sleep(50);
				System.out.println ("Enable The output");
				long result9 = jVisa.write(":OUTP:STAT 1");            
				System.out.println(result9);
				Thread.currentThread().sleep(12000);
        	}
			catch(Exception e)
            {
               System.out.println("Exception caught-Reset");
            }

            //print(jVisa.setAttribute(":OUTP:STAT", 0));//  ("*RST"));     
            /*
            System.out.println ("Disable the Output");
            print(inst_33220A.write(":OUTP:STAT 0")); 
            System.out.println("Setting Frequency");
            Thread.sleep(50);
            print(inst_33220A.write(":SOUR:FREQ:CW 1.1512 MHZ"));     
            System.out.println("Setting Amplitude");
            Thread.sleep(50);
            print(inst_33220A.write(":SOUR:VOLT:LEV:IMM:AMPL 0.1 VPP"));        //#:SOUR:VOLT:LEV:IMM:AMPL 0.1
            System.out.println ("Setting Cycle Phase");
            Thread.sleep(50);
            print (inst_33220A.write(":SOUR:BURS:PHAS 0 "));
            System.out.println ("Enable Burst State");
            Thread.sleep(50);
            print(inst_33220A.write(":SOUR:BURS:STAT 1"));  
            System.out.println ("Setting Burst Cycles");
            Thread.sleep(50);      
            print (inst_33220A.write(":SOUR:BURS:NCYC 50000"));
            System.out.println ("Setting Period to %.2f S" %float(period));
            Thread.sleep(50);
            print (inst_33220A.write(":SOUR:BURS:INT:PER %f S" %float(period)));       
            System.out.println ("Enable the Output");
            Thread.sleep(50);
            print(inst_33220A.write(":OUTP:STAT 1"));
            */
            System.out.println("Close resource manager session.");
            viStatus = jVisa.closeResourceManager();
            if (viStatus != VisatypeLibrary.VI_SUCCESS) {
                System.err.println(rmError);
            }
            System.out.println("Success.\r\n");
          }
          catch (JVisaException e) {
              System.err.println(e.toString());
              if (resourceManager != -1 && jVisa != null) {
                  jVisa.closeResourceManager();
              }
          }
          finally {
            System.out.println("Finished testing JVisa.");
          }
    }   // End of For Loop        
  }

}