import java.util.Scanner;

import de.beckhoff.jni.Convert;
import de.beckhoff.jni.JNIByteBuffer;
import de.beckhoff.jni.tcads.AmsAddr;
import de.beckhoff.jni.tcads.AdsCallDllFunction;

public class ads {

	  public static void main(String[] args) throws Exception
	    {	
	        long nPort, nErr;
	        AmsAddr addr = new AmsAddr();
	       double lreal;
	  
	       byte[] dataVal1=new byte[8];
	    
	      
	       JNIByteBuffer hdlBuff = new JNIByteBuffer(4);
	       JNIByteBuffer symBuff = new JNIByteBuffer(Convert.StringToByteArr(
           "MAIN.PLCVar"));
	        // Open communication
	        nPort = AdsCallDllFunction.adsPortOpen();
	        nErr = AdsCallDllFunction.getLocalAddress(addr);
	        addr.setPort(801);
	   	Scanner Scan=new Scanner(System.in);
         
            	
      	        lreal=Scan.nextDouble();
      	        dataVal1=doubleToByte(lreal);
      	      JNIByteBuffer dataBuff=new JNIByteBuffer(8);
      	      dataBuff.setByteArray(dataVal1);
      	 
            nErr = AdsCallDllFunction.adsSyncReadWriteReq(addr,
                    0xF003,
                    0x0,
                    hdlBuff.getUsedBytesCount(),
                    hdlBuff,
                    symBuff.getUsedBytesCount(),
                    symBuff);
            if(nErr!=0) { System.out.println("Error: Get handle: 0x"
                    + Long.toHexString(nErr)); }
            int hdlBuffToInt = Convert.ByteArrToInt(hdlBuff.getByteArray());
            nErr = AdsCallDllFunction.adsSyncWriteReq(addr,
                    0xF005,
                    hdlBuffToInt,
                    0x8,
                    dataBuff);
            nErr = AdsCallDllFunction.adsPortClose();
            if(nErr!=0) { System.out.println("Error: Close Communication: 0x"
                                                + Long.toHexString(nErr)); }

            try{
                System.in.read();
            }
            catch (Exception e){
                System.out.println("Error: Close program");
            }
    
	    }
	  public static double byteToDouble(byte[] b)
      {
      	  long l;
      	  l=b[0];
      	  l&=0xff;
      	  l|=((long)b[1]<<8);
      	  l&=0xffff;
      	  l|=((long)b[2]<<16);
      	  l&=0xffffff;
      	  l|=((long)b[3]<<24);
      	  l&=0xffffffffl;
      	  l|=((long)b[4]<<32);
      	  l&=0xffffffffffl;
      	  l|=((long)b[5]<<40);
      	  l&=0xffffffffffffl;
      	  l|=((long)b[6]<<48);
      	  l|=((long)b[7]<<56);
      	  return Double.longBitsToDouble(l);
      	 }
	  public static byte[] doubleToByte(double d){  
		    byte[] b=new byte[8];  
		    long l=Double.doubleToLongBits(d);  
		    for(int i=0;i<b.length;i++){  
		    	b[i]=0;
		      b[i]=new Long(l).byteValue();  
		      l=l>>8;  
		    }  
		    return b;  
		    }
}