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object FibonacciLFSR

Utility for generating a pseudorandom UInt from a FibonacciLFSR.

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

val pseudoRandomNumber = FibonacciLFSR.maxPeriod(8)
Source
FibonacciLFSR.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 FibonacciLFSR.

    Return a pseudorandom UInt generated from a FibonacciLFSR.

    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 FibonacciLFSR

    Return a pseudorandom UInt generated using a maximal period FibonacciLFSR

    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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