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# Packages

-  package root
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    root
-  package chisel3

  This package contains the main chisel3 API.

  This package contains the main chisel3 API.

  Definition Classes
    root
-  package util

  The util package provides extensions to core chisel for common hardware components and utility functions

  The util package provides extensions to core chisel for common hardware components and utility functions

  Definition Classes
    chisel3
-  package random
  Definition Classes
    util
- FibonacciLFSR
- GaloisLFSR
- LFSR
- LFSRReduce
- MaxPeriodFibonacciLFSR
- MaxPeriodGaloisLFSR
- PRNG
- PRNGIO
- XNOR
- XOR

o

chisel3.util.random

# GaloisLFSR

###
Companion class GaloisLFSR

#### object GaloisLFSR

Utility for generating a pseudorandom UInt from a GaloisLFSR.

For example, to generate a pseudorandom 8-bit UInt that changes every cycle, you can use:

    val pseudoRandomNumber = GaloisLFSR.maxPeriod(8)

Source
  GaloisLFSR.scala

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4.  def apply(width: Int, taps: Set[Int], increment: Bool = true.B, seed: Option[BigInt] = Some(1), reduction: LFSRReduce = XOR): UInt

   Return a pseudorandom UInt generated from a GaloisLFSR.

   Return a pseudorandom UInt generated from a GaloisLFSR.

   width

     of pseudorandom output

   taps

     a set of tap points to use when constructing the LFSR

   increment

     when asserted, a new random value will be generated

   seed

     an initial value for internal LFSR state

   reduction

     the reduction operation (either XOR or XNOR)

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13.  def maxPeriod(width: Int, increment: Bool = true.B, seed: Option[BigInt] = Some(1), reduction: LFSRReduce = XOR): UInt

    Return a pseudorandom UInt generated using a maximal period GaloisLFSR

    Return a pseudorandom UInt generated using a maximal period GaloisLFSR

    width

      of pseudorandom output

    increment

      when asserted, a new random value will be generated

    seed

      an initial value for internal LFSR state

    reduction

      the reduction operation (either XOR or XNOR)

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