Package jpigpio

Class Utils

java.lang.Object
jpigpio.Utils
public class Utils
extends java.lang.Object

  • Constructor Summary

    Constructors 
    Constructor Description
    Utils()  

  • Method Summary

    Modifier and Type Method Description
    static void addShutdown​(JPigpio pigpio)
    Add a handler to perform a clean termination of pigpio on termination.
    static int bitMask​(int bit)
    Calculate a bitmask of the bit.
    static java.lang.String bitString​(boolean value)
    Return a string representation of "0" or "1" as the value of a boolean.
    static byte[] bytes2nibbles​(byte[] bytes)  
    static java.lang.String bytesToHex​(byte[] bytes)  
    static java.lang.String byteToBinary​(byte value)
    Return a binary string representation of the byte.
    static int byteWordToInt​(byte[] word)
    Given an array of 2 bytes, return an int representation using the 1st byte as the MSByte.
    static byte clearBit​(byte value, int bit)
    Clear the bit within the byte.
    static int clearBit​(int value, int bit)
    Clear the bit within the int.
    static java.lang.String dumpData​(byte[] data)
    Dump an array of bytes
    static java.lang.String int16ToBinary​(int value)
    Return a binary string representation of the first 16 bits of the integer.
    static boolean isSet​(byte value, int bit)
    Return true if the corresponding bit of the data is set.
    static boolean isSet​(int value, int bit)
    Return true if the corresponding bit of the data is set.
    static java.lang.Long LEint2Long​(byte[] bytes)  
    static int mapToInt​(int value, int sourceLow, int sourceHigh, int targetLow, int targetHigh)  
    static byte[] nibbles2bytes​(byte[] nibb)  
    static byte setBit​(byte value, int bit)
    Set the bit within the byte.
    static int setBit​(int value, int bit)
    Set the bit within the int.
    static long tickDiff​(long olderTick, long tick)
    Returns the microsecond difference between two ticks.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

  • Method Details

    • addShutdown

      public static void addShutdown​(JPigpio pigpio)
      Add a handler to perform a clean termination of pigpio on termination.
      Parameters:
      pigpio - pigpio object to terminate

    • mapToInt

      public static int mapToInt​(int value, int sourceLow, int sourceHigh, int targetLow, int targetHigh)

    • byteToBinary

      public static java.lang.String byteToBinary​(byte value)
      Return a binary string representation of the byte.
      Parameters:
      value - byte to convert
      Returns:
      A binary string representation of the byte.

    • int16ToBinary

      public static java.lang.String int16ToBinary​(int value)
      Return a binary string representation of the first 16 bits of the integer.
      Parameters:
      value - integer to convert
      Returns:
      A binary string representation of the first 16 bits of the integer.

    • byteWordToInt

      public static int byteWordToInt​(byte[] word)
      Given an array of 2 bytes, return an int representation using the 1st byte as the MSByte.
      Parameters:
      word - The 2 bytes of data.
      Returns:
      An int representation of the two bytes of data.

    • setBit

      public static int setBit​(int value, int bit)
      Set the bit within the int.
      Parameters:
      value - The value in which to set the bit.
      bit - The bit to set.
      Returns:
      The new value with the bit set.

    • setBit

      public static byte setBit​(byte value, int bit)
      Set the bit within the byte.
      Parameters:
      value - The value in which to set the bit.
      bit - The bit to set.
      Returns:
      The new value with the bit set.

    • clearBit

      public static int clearBit​(int value, int bit)
      Clear the bit within the int.
      Parameters:
      value - The value in which the bit is to be cleared.
      bit - The bit to clear.
      Returns:
      The value with the bit cleared.

    • clearBit

      public static byte clearBit​(byte value, int bit)
      Clear the bit within the byte.
      Parameters:
      value - The value in which the bit is to be cleared.
      bit - The bit to clear.
      Returns:
      The value with the bit cleared.

    • bitMask

      public static int bitMask​(int bit)
      Calculate a bitmask of the bit.
      Parameters:
      bit - The bit to be used to calculate the bitmask.
      Returns:
      The value of the bitmask.

    • isSet

      public static boolean isSet​(int value, int bit)
      Return true if the corresponding bit of the data is set.
      Parameters:
      value - The data to test.
      bit - The bit to examine.
      Returns:
      True if the corresponding bit in the data is set.

    • isSet

      public static boolean isSet​(byte value, int bit)
      Return true if the corresponding bit of the data is set.
      Parameters:
      value - The data to test.
      bit - The bit to examine.
      Returns:
      True if the corresponding bit in the data is set.

    • dumpData

      public static java.lang.String dumpData​(byte[] data)
      Dump an array of bytes
      Parameters:
      data - The data to dump
      Returns:
      A string representation of the data.

    • bitString

      public static java.lang.String bitString​(boolean value)
      Return a string representation of "0" or "1" as the value of a boolean.
      Parameters:
      value - A boolean to examine.
      Returns:
      The string "1" is the boolean is true and "0" if the boolean is false.

    • tickDiff

      public static long tickDiff​(long olderTick, long tick)
      Returns the microsecond difference between two ticks. This function handles rollover of ticks as ticks are only 32bit. ... print(pigpio.tickDiff(4294967272, 12)) 36 ...
      Parameters:
      olderTick - tick 1
      tick - tick 2
      Returns:
      difference between ticks

    • bytesToHex

      public static java.lang.String bytesToHex​(byte[] bytes)

    • bytes2nibbles

      public static byte[] bytes2nibbles​(byte[] bytes)

    • nibbles2bytes

      public static byte[] nibbles2bytes​(byte[] nibb)

    • LEint2Long

      public static java.lang.Long LEint2Long​(byte[] bytes)