riscv/rocket-chip
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allow Serializer/Deserializer to work with arbitrary Chisel data types

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This commit is contained in:
Howard Mao 2016-09-03 20:41:48 -07:00
parent b9b79e4fb6
commit efe8670283
1 changed files with 10 additions and 7 deletions
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17
src/main/scala/junctions/stream.scala
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@ -148,19 +148,22 @@ object StreamUtils {
a.in <> b.out a.in <> b.out
b.in <> a.out b.in <> a.out
} }
def roundUp(n: Int, d: Int) = ((n - 1) / d + 1) * d
} }
trait Serializable { class SerialIO(w: Int) extends Bundle {
def nbits: Int val out = Decoupled(UInt(width = w))
val in = Decoupled(UInt(width = w)).flip
override def cloneType = new SerialIO(w).asInstanceOf[this.type]
} }
class Serializer[T <: Data with Serializable](w: Int, typ: T) extends Module { class Serializer[T <: Data](w: Int, typ: T) extends Module {
val io = new Bundle { val io = new Bundle {
val in = Decoupled(typ).flip val in = Decoupled(typ).flip
val out = Decoupled(Bits(width = w)) val out = Decoupled(Bits(width = w))
} }
val narrower = Module(new StreamNarrower(typ.nbits, w)) val narrower = Module(new StreamNarrower(StreamUtils.roundUp(typ.getWidth, w), w))
narrower.io.in.bits.data := io.in.bits.asUInt narrower.io.in.bits.data := io.in.bits.asUInt
narrower.io.in.bits.last := Bool(true) narrower.io.in.bits.last := Bool(true)
narrower.io.in.valid := io.in.valid narrower.io.in.valid := io.in.valid
@ -170,18 +173,18 @@ class Serializer[T <: Data with Serializable](w: Int, typ: T) extends Module {
narrower.io.out.ready := io.out.ready narrower.io.out.ready := io.out.ready
} }
class Deserializer[T <: Data with Serializable](w: Int, typ: T) extends Module { class Deserializer[T <: Data](w: Int, typ: T) extends Module {
val io = new Bundle { val io = new Bundle {
val in = Decoupled(Bits(width = w)).flip val in = Decoupled(Bits(width = w)).flip
val out = Decoupled(typ) val out = Decoupled(typ)
} }
val expander = Module(new StreamExpander(w, typ.nbits)) val expander = Module(new StreamExpander(w, StreamUtils.roundUp(typ.getWidth, w)))
expander.io.in.valid := io.in.valid expander.io.in.valid := io.in.valid
expander.io.in.bits.data := io.in.bits expander.io.in.bits.data := io.in.bits
expander.io.in.bits.last := Bool(true) expander.io.in.bits.last := Bool(true)
io.in.ready := expander.io.in.ready io.in.ready := expander.io.in.ready
io.out.valid := expander.io.out.valid io.out.valid := expander.io.out.valid
io.out.bits := typ.cloneType.fromBits(expander.io.out.bits.data) io.out.bits := typ.fromBits(expander.io.out.bits.data)
expander.io.out.ready := io.out.ready expander.io.out.ready := io.out.ready
} }