object Valid
Factory for generating "valid" interfaces. A "valid" interface is a data-communicating interface between a producer and a consumer where the producer does not wait for the consumer. Concretely, this means that one additional bit is added to the data indicating its validity.
As an example, consider the following Bundle, MyBundle
:
class MyBundle extends Bundle { val foo = Output(UInt(8.W)) }
To convert this to a "valid" interface, you wrap it with a call to the Valid
companion object's
apply method:
val bar = Valid(new MyBundle)
The resulting interface is structurally equivalent to the following:
class MyValidBundle extends Bundle { val valid = Output(Bool()) val bits = Output(new MyBundle) }
In addition to adding the valid
bit, a Valid.fire method is also added that returns the valid
bit. This
provides a similarly named interface to DecoupledIO's fire.
- Source
- Valid.scala
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def
apply[T <: Data](gen: T): Valid[T]
Wrap some Data in a valid interface
Wrap some Data in a valid interface
- T
the type of the data to wrap
- gen
the data to wrap
- returns
the wrapped input data
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This is the documentation for Chisel.
Package structure
The chisel3 package presents the public API of Chisel. It contains the concrete core types
UInt
,SInt
,Bool
,FixedPoint
,Clock
, andReg
, the abstract typesBits
,Aggregate
, andData
, and the aggregate typesBundle
andVec
.The Chisel package is a compatibility layer that attempts to provide chisel2 compatibility in chisel3.
Utility objects and methods are found in the
util
package.The
testers
package defines the basic interface for chisel testers.