Package com.dalsemi.onewire.utils

Class CRC8

java.lang.Object
com.dalsemi.onewire.utils.CRC8
public class CRC8 extends Object
CRC8 is a class to contain an implementation of the Cyclic-Redundency-Check CRC8 for the iButton. The CRC8 is used in the 1-Wire Network address of all iButtons and 1-Wire devices.

CRC8 is based on the polynomial = X^8 + X^5 + X^4 + 1.

  • Method Summary

    Modifier and Type
    Method
    Description
    static int
    compute(byte[] dataToCrc)
    Perform the CRC8 on an array of data elements based on a zero seed.
    static int
    compute(byte[] dataToCrc, int seed)
    Perform the CRC8 on an array of data elements based on the provided seed.
    static int
    compute(byte[] dataToCrc, int off, int len)
    Perform the CRC8 on an array of data elements based on a zero seed.
    static int
    compute(byte[] dataToCrc, int off, int len, int seed)
    Perform the CRC8 on an array of data elements based on the provided seed.
    static int
    compute(int dataToCRC)
    Perform the CRC8 on the data element based on a zero seed.
    static int
    compute(int dataToCRC, int seed)
    Perform the CRC8 on the data element based on the provided seed.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • compute

      public static int compute(int dataToCRC, int seed)
      Perform the CRC8 on the data element based on the provided seed.

      CRC8 is based on the polynomial = X^8 + X^5 + X^4 + 1.

      Parameters:
      seed - seed the CRC8 with this value
      dataToCrc - data element on which to perform the CRC8
      Returns:
      CRC8 value

    • compute

      public static int compute(int dataToCRC)
      Perform the CRC8 on the data element based on a zero seed.

      CRC8 is based on the polynomial = X^8 + X^5 + X^4 + 1.

      Parameters:
      dataToCrc - data element on which to perform the CRC8
      Returns:
      CRC8 value

    • compute

      public static int compute(byte[] dataToCrc)
      Perform the CRC8 on an array of data elements based on a zero seed.

      CRC8 is based on the polynomial = X^8 + X^5 + X^4 + 1.

      Parameters:
      dataToCrc - array of data elements on which to perform the CRC8
      Returns:
      CRC8 value

    • compute

      public static int compute(byte[] dataToCrc, int off, int len)
      Perform the CRC8 on an array of data elements based on a zero seed.

      CRC8 is based on the polynomial = X^8 + X^5 + X^4 + 1.

      Parameters:
      dataToCrc - array of data elements on which to perform the CRC8
      off - offset into array
      len - length of data to crc
      Returns:
      CRC8 value

    • compute

      public static int compute(byte[] dataToCrc, int off, int len, int seed)
      Perform the CRC8 on an array of data elements based on the provided seed.

      CRC8 is based on the polynomial = X^8 + X^5 + X^4 + 1.

      Parameters:
      dataToCrc - array of data elements on which to perform the CRC8
      off - offset into array
      len - length of data to crc
      seed - seed to use for CRC8
      Returns:
      CRC8 value

    • compute

      public static int compute(byte[] dataToCrc, int seed)
      Perform the CRC8 on an array of data elements based on the provided seed.

      CRC8 is based on the polynomial = X^8 + X^5 + X^4 + 1.

      Parameters:
      dataToCrc - array of data elements on which to perform the CRC8
      seed - seed to use for CRC8
      Returns:
      CRC8 value