//License
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/***
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* Java Modbus Library (jamod)
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* Copyright (c) 2002-2004, jamod development team
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS
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* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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***/
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package tbDataModel_Dell;
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/**
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* Helper class that provides utility methods.
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* ¸¨ÖúÀà ÌṩmodbusUtil
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* @author Dieter Wimberger
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* @author John Charlton
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*
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* @version 1.2rc1 (09/11/2004)
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*/
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public final class ModbusUtil {
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public static final String toHex(byte[] data) {
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return toHex(data, 0, data.length);
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}//toHex
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public static final String toHex(byte[] data, int off, int length) {
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//double size, two bytes (hex range) for one byte
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StringBuffer buf = new StringBuffer(data.length * 2);
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for (int i = off; i < length; i++) {
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//don't forget the second hex digit
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if (((int) data[i] & 0xff) < 0x10) {
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buf.append("0");
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}
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buf.append(Long.toString((int) data[i] & 0xff, 16));
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if (i < data.length - 1) {
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buf.append(" ");
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}
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}
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return buf.toString();
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}//toHex
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public static final byte[] toHex(int i) {
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StringBuffer buf = new StringBuffer(2);
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//don't forget the second hex digit
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if (((int) i & 0xff) < 0x10) {
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buf.append("0");
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}
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buf.append(Long.toString((int) i & 0xff, 16).toUpperCase());
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return buf.toString().getBytes();
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}//toHex
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public static final int registerToUnsignedShort(byte[] bytes) {
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return ((bytes[0] & 0xff) << 8 | (bytes[1] & 0xff));
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}//registerToUnsignedShort
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/**
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* Converts the given unsigned short into a register
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* (2 bytes).
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* The byte values in the register, in the order
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* shown, are:
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* <p/>
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* <pre><code>
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* (byte)(0xff & (v >> 8))
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* (byte)(0xff & v)
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* </code></pre>
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* <p/>
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* This conversion has been taken from the documentation of
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* the <tt>DataOutput</tt> interface.
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*
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* @param v
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* @return the register as <tt>byte[2]</tt>.
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* @see java.io.DataOutput
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*/
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public static final byte[] unsignedShortToRegister(int v) {
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byte[] register = new byte[2];
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register[0] = (byte) (0xff & (v >> 8));
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register[1] = (byte) (0xff & v);
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return register;
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}//unsignedShortToRegister
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/**
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* Converts the given register (16-bit value) into
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* a <tt>short</tt>.
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* The value returned is:
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* <p/>
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* <pre><code>
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* (short)((a << 8) | (b & 0xff))
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* </code></pre>
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* <p/>
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* This conversion has been taken from the documentation of
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* the <tt>DataInput</tt> interface.
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*
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* @param bytes bytes a register as <tt>byte[2]</tt>.
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* @return the signed short as <tt>short</tt>.
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*/
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public static final short registerToShort(byte[] bytes) {
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return (short) ((bytes[0] << 8) | (bytes[1] & 0xff));
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}//registerToShort
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/**
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* Converts the register (16-bit value) at the given index
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* into a <tt>short</tt>.
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* The value returned is:
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* <p/>
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* <pre><code>
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* (short)((a << 8) | (b & 0xff))
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* </code></pre>
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* <p/>
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* This conversion has been taken from the documentation of
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* the <tt>DataInput</tt> interface.
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*
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* @param bytes a <tt>byte[]</tt> containing a short value.
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* @param idx an offset into the given byte[].
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* @return the signed short as <tt>short</tt>.
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*/
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public static final short registerToShort(byte[] bytes, int idx) {
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return (short) ((bytes[idx] << 8) | (bytes[idx + 1] & 0xff));
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}//registerToShort
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/**
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* Converts the given <tt>short</tt> into a register
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* (2 bytes).
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* The byte values in the register, in the order
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* shown, are:
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* <p/>
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* <pre><code>
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* (byte)(0xff & (v >> 8))
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* (byte)(0xff & v)
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* </code></pre>
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*
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* @param s
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* @return a register containing the given short value.
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*/
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public static final byte[] shortToRegister(short s) {
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byte[] register = new byte[2];
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register[0] = (byte) (0xff & (s >> 8));
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register[1] = (byte) (0xff & s);
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return register;
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}//shortToRegister
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/**
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* Converts a byte[4] binary int value to a primitive int.<br>
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* The value returned is:
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* <p><pre>
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* <code>
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* (((a & 0xff) << 24) | ((b & 0xff) << 16) |
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*  ((c & 0xff) << 8) | (d & 0xff))
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* </code></pre>
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*
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* @param bytes registers as <tt>byte[4]</tt>.
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* @return the integer contained in the given register bytes.
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*/
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public static final int registersToInt(byte[] bytes,int idx) {
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return (
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((bytes[idx] & 0xff) << 24) |
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((bytes[idx+1] & 0xff) << 16) |
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((bytes[idx+2] & 0xff) << 8) |
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(bytes[idx+3] & 0xff)
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);
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}//registersToInt
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public static final int registersToInt(byte[] bytes) {
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return (
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((bytes[0] & 0xff) << 24) |
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((bytes[1] & 0xff) << 16) |
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((bytes[2] & 0xff) << 8) |
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(bytes[3] & 0xff)
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);
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}//registersToInt
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/**
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* Converts an int value to a byte[4] array.
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*
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* @param v the value to be converted.
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* @return a byte[4] containing the value.
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*/
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public static final byte[] intToRegisters(int v) {
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byte[] registers = new byte[4];
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registers[0] = (byte) (0xff & (v >> 24));
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registers[1] = (byte) (0xff & (v >> 16));
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registers[2] = (byte) (0xff & (v >> 8));
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registers[3] = (byte) (0xff & v);
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return registers;
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}//intToRegisters
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/**
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* Converts a byte[8] binary long value into a long
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* primitive.
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*
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* @param bytes a byte[8] containing a long value.
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* @return a long value.
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*/
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public static final long registersToLong(byte[] bytes) {
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return (
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(((long) (bytes[0] & 0xff) << 56) |
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((long) (bytes[1] & 0xff) << 48) |
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((long) (bytes[2] & 0xff) << 40) |
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((long) (bytes[3] & 0xff) << 32) |
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((long) (bytes[4] & 0xff) << 24) |
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((long) (bytes[5] & 0xff) << 16) |
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((long) (bytes[6] & 0xff) << 8) |
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((long) (bytes[7] & 0xff)))
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);
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}//registersToLong
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/**
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* Converts a long value to a byte[8].
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*
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* @param v the value to be converted.
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* @return a byte[8] containing the long value.
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*/
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public static final byte[] longToRegisters(long v) {
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byte[] registers = new byte[8];
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registers[0] = (byte) (0xff & (v >> 56));
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registers[1] = (byte) (0xff & (v >> 48));
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registers[2] = (byte) (0xff & (v >> 40));
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registers[3] = (byte) (0xff & (v >> 32));
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registers[4] = (byte) (0xff & (v >> 24));
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registers[5] = (byte) (0xff & (v >> 16));
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registers[6] = (byte) (0xff & (v >> 8));
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registers[7] = (byte) (0xff & v);
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return registers;
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}//longToRegisters
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/**
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* Converts a byte[4] binary float value to a float primitive.
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*
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* @param bytes the byte[4] containing the float value.
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* @return a float value.
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*/
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public static final float registersToFloat(byte[] bytes) {
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return Float.intBitsToFloat((
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((bytes[0] & 0xff) << 24) |
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((bytes[1] & 0xff) << 16) |
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((bytes[2] & 0xff) << 8) |
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(bytes[3] & 0xff)
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));
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}//registersToFloat
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/**
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* Converts a float value to a byte[4] binary float value.
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*
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* @param f the float to be converted.
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* @return a byte[4] containing the float value.
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*/
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public static final byte[] floatToRegisters(float f) {
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return intToRegisters(Float.floatToIntBits(f));
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}//floatToRegisters
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/**
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* Converts a byte[8] binary double value into a double primitive.
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*
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* @param bytes a byte[8] to be converted.
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* @return a double value.
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*/
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public static final double registersToDouble(byte[] bytes) {
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return Double.longBitsToDouble((
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(((long) (bytes[0] & 0xff) << 56) |
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((long) (bytes[1] & 0xff) << 48) |
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((long) (bytes[2] & 0xff) << 40) |
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((long) (bytes[3] & 0xff) << 32) |
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((long) (bytes[4] & 0xff) << 24) |
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((long) (bytes[5] & 0xff) << 16) |
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((long) (bytes[6] & 0xff) << 8) |
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((long) (bytes[7] & 0xff)))
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));
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}//registersToDouble
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/**
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* Converts a double value to a byte[8].
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*
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* @param d the double to be converted.
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* @return a byte[8].
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*/
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public static final byte[] doubleToRegisters(double d) {
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return longToRegisters(Double.doubleToLongBits(d));
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}//doubleToRegisters
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/**
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* Converts an unsigned byte to an integer.
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*
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* @param b the byte to be converted.
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* @return an integer containing the unsigned byte value.
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*/
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public static final int unsignedByteToInt(byte b) {
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return (int) b & 0xFF;
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}//unsignedByteToInt
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/**
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* Returns the broadcast address for the subnet of the host the code
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* is executed on.
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*
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* @return the broadcast address as <tt>InetAddress</tt>.
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* <p/>
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* public static final InetAddress getBroadcastAddress() {
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* byte[] addr = new byte[4];
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* try {
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* addr = InetAddress.getLocalHost().getAddress();
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* addr[3] = -1;
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* return getAddressFromBytes(addr);
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* } catch (Exception ex) {
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* ex.printStackTrace();
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* return null;
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* }
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* }//getBroadcastAddress
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*/
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/*
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public static final InetAddress getAddressFromBytes(byte[] addr) throws Exception {
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StringBuffer sbuf = new StringBuffer();
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for (int i = 0; i < addr.length; i++) {
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if (addr[i] < 0) {
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sbuf.append(256 + addr[i]);
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} else {
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sbuf.append(addr[i]);
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}
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if (i < (addr.length - 1)) {
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sbuf.append('.');
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}
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}
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//DEBUG:System.out.println(sbuf.toString());
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return InetAddress.getByName(sbuf.toString());
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}//getAddressFromBytes
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*/
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//TODO: John description.
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/**
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* Returs the low byte of an integer word.
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*
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* @param wd
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* @return
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*/
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public static final byte lowByte(int wd) {
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return (new Integer(0xff & wd).byteValue());
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}// lowByte
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//TODO: John description.
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/**
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*
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* @param wd
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* @return
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*/
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public static final byte hiByte(int wd) {
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return (new Integer(0xff & (wd >> 8)).byteValue());
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}// hiByte
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//TODO: John description.
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/**
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*
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* @param hibyte
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* @param lowbyte
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* @return
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*/
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public static final int makeWord(int hibyte, int lowbyte) {
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int hi = 0xFF & hibyte;
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int low = 0xFF & lowbyte;
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return ((hi << 8) | low);
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}// makeWord
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public static byte convertStringToHex(String str){
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char[] chars = str.toCharArray();
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StringBuffer hex = new StringBuffer();
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int size=chars.length;
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for(int i = 0; i <size ; i++){
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hex.append(Integer.toHexString((int)chars[i]));
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}
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return (byte) Integer.parseInt(hex.toString());
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}
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public static final int[] calculateCRC(byte[] data, int offset, int len) {
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int[] crc = {0xFF, 0xFF};
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int nextByte = 0;
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int uIndex; /* will index into CRC lookup*/ /* table */
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/* pass through message buffer */
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for (int i = offset; i < len && i < data.length; i++) {
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nextByte = 0xFF & ((int) data[i]);
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uIndex = crc[0] ^ nextByte; //*puchMsg++; /* calculate the CRC */
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crc[0] = crc[1] ^ auchCRCHi[uIndex];
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crc[1] = auchCRCLo[uIndex];
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}
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return crc;
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}//getCRC
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/* Table of CRC values for high-order byte */
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private final static short[] auchCRCHi = {
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
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0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
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0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
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0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
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0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
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0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
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0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
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0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
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0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
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0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40
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};
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/* Table of CRC values for low-order byte */
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private final static short[] auchCRCLo = {
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0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
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0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
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0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
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0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
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0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
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0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
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0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
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0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
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0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
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0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
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0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
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0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
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0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
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0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
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0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
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0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
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0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
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0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
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0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
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0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
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0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
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0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
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0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
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0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
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0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
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0x43, 0x83, 0x41, 0x81, 0x80, 0x40
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};
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}//class ModBusUtil
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