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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 circt
  Definition Classes
    util
-  package experimental
  Definition Classes
    util
-  package random
  Definition Classes
    util
- Arbiter
- ArbiterIO
- BinaryMemoryFile
- BinaryToGray
- BitPat
- Cat
- Counter
- Decoupled
- DecoupledIO
- DeqIO
- EnqIO
- Enum
- Fill
- FillInterleaved
- GrayToBinary
- HasBlackBoxInline
- HasBlackBoxPath
- HasBlackBoxResource
- HasExtModuleInline
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- HasExtModuleResource
- HexMemoryFile
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- IrrevocableIO
- ListLookup
- LockingArbiter
- LockingArbiterLike
- LockingRRArbiter
- Log2
- Lookup
- MemoryFile
- MemoryReadPort
- MemoryReadWritePort
- MemoryWritePort
- MixedVec
- MixedVecInit
- Mux1H
- MuxCase
- MuxLookup
- OHToUInt
- Pipe
- PopCount
- PriorityEncoder
- PriorityEncoderOH
- PriorityMux
- Queue
- QueueIO
- RRArbiter
- ReadyValidIO
- RegEnable
- Reverse
- SRAM
- SRAMInterface
- ShiftRegister
- ShiftRegisters
- SparseVec
- SwitchContext
- UIntToOH
- Valid
- is
- isPow2
- log2Ceil
- log2Down
- log2Floor
- log2Up
- pla
- scanLeftOr
- scanRightOr
- signedBitLength
- simpleClassName
- switch
- unsignedBitLength

o

chisel3.util

# Counter

###
Companion class Counter

#### object Counter

Source
  Counter.scala

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4.  def apply(r: Range, enable: Bool = true.B, reset: Bool = false.B): (UInt, Bool)

   Creates a counter that steps through a specified range of values.

   Creates a counter that steps through a specified range of values.

   r

     the range of counter values

   enable

     controls whether the counter increments this cycle

   reset

     resets the counter to its initial value during this cycle

   returns

     tuple of the counter value and whether the counter will wrap (the value is at maximum and the condition is true).

5.  def apply(cond: Bool, n: Int): (UInt, Bool)

   Instantiate a counter with the specified number of counts and a gate.

   Instantiate a counter with the specified number of counts and a gate.

   cond

     condition that controls whether the counter increments this cycle

   n

     number of counts before the counter resets

   returns

     tuple of the counter value and whether the counter will wrap (the value is at maximum and the condition is true).

6.  def apply(n: Int): Counter

   Instantiate a counter with the specified number of counts.

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