Android Open Source - tnc1-android-config Intel Hex Record

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License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2013 Mobilinkd LLC// w w w . j av  a2  s.  c om
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.mobilinkd.tncconfig;

import android.util.Log;

public class IntelHexRecord {

  private String record = null;
  private int length = 0;
  private int address = 0;
  private int type = 0;
  private int checksum = 0;
  private byte[] data = null;
  
  // Debugging
  private static final String TAG = "IntelHexRecord";
  private static final boolean D = false;

  
  private char parseStartCode() {
    return record.charAt(0);
  }
  
  private int parseLength() {
    return Integer.parseInt(record.substring(1, 3), 16);
  }
  
  private int parseAddress() {
    return Integer.parseInt(record.substring(3, 7), 16);
  }
  
  private int parseType() {
    return Integer.parseInt(record.substring(7, 9), 16);
  }
  
  private int parseChecksum() {
    return Integer.parseInt(record.substring(record.length() - 2), 16);
  }
  
  private byte[] parseData(int size) {
    byte[] result = new byte[size];
    for (int i = 0; i != size; i++) {
      int pos = 9 + (i * 2);
      result[i] = (byte) Integer.parseInt(
          record.substring(pos, pos + 2), 16);
    }
    assert(result.length == size);
    return result;
  }
  
  private int computeChecksum() {
    int checksum = 0;
    for (int i = 1; i != record.length() - 2; i += 2) {
      checksum += Integer.parseInt(
          record.substring(i, i + 2), 16);
    }
    checksum %= 256;
    checksum = 256 - checksum;
    checksum %=256;
    return checksum;
  }
  
  private boolean parse() {
    if (parseStartCode() != ':') return false;
    
    length = parseLength();
    address = parseAddress();
    type = parseType();
    data = parseData(length);
    checksum = parseChecksum();
    
    if (D) Log.i(TAG, "address: " + Integer.toHexString(address));
    if (D) Log.i(TAG, "length: " + Integer.toString(length));

    return checksum == computeChecksum();
  }
  
  public IntelHexRecord(String line) throws IllegalArgumentException {
    record = line;
    if (!parse()) throw new IllegalArgumentException(line);
  }
  
  public int length() {
    return length;
  }
  
  public int type() {
    return type;
  }
  
  public int address() {
    return address;
  }

  public byte[] data() {
    return data;
  }
}

Java Source Code List