Merge pull request #291 from ucb-bar/utilscaladocs

Scaladocs for utils

1 files changed, 26 insertions, 19 deletions

diff --git a/src/main/scala/chisel3/util/Arbiter.scala b/src/main/scala/chisel3/util/Arbiter.scala
index eb541977..58ba1188 100644
--- a/src/main/scala/chisel3/util/Arbiter.scala
+++ b/src/main/scala/chisel3/util/Arbiter.scala
@@ -7,16 +7,21 @@ package chisel3.util
 
 import chisel3._
 
-/** An I/O bundle for the Arbiter */
+/** IO bundle definition for an Arbiter, which takes some number of ready-valid inputs and outputs
+  * (selects) at most one.
+  *
+  * @param gen data type
+  * @param n number of inputs
+  */
 class ArbiterIO[T <: Data](gen: T, n: Int) extends Bundle {
   val in  = Vec(n, Decoupled(gen)).flip
   val out = Decoupled(gen)
   val chosen = UInt(OUTPUT, log2Up(n))
 }
 
-/** Arbiter Control determining which producer has access */
-private object ArbiterCtrl
-{
+/** Arbiter Control determining which producer has access
+  */
+private object ArbiterCtrl {
   def apply(request: Seq[Bool]): Seq[Bool] = request.length match {
     case 0 => Seq()
     case 1 => Seq(Bool(true))
@@ -81,25 +86,27 @@ class LockingArbiter[T <: Data](gen: T, n: Int, count: Int, needsLock: Option[T
 }
 
 /** Hardware module that is used to sequence n producers into 1 consumer.
-  Producers are chosen in round robin order.
-
-  Example usage:
-    val arb = new RRArbiter(2, UInt())
-    arb.io.in(0) <> producer0.io.out
-    arb.io.in(1) <> producer1.io.out
-    consumer.io.in <> arb.io.out
+  * Producers are chosen in round robin order.
+  *
+  * @example {{{
+  * val arb = new RRArbiter(2, UInt())
+  * arb.io.in(0) <> producer0.io.out
+  * arb.io.in(1) <> producer1.io.out
+  * consumer.io.in <> arb.io.out
+  * }}}
   */
 class RRArbiter[T <: Data](gen:T, n: Int) extends LockingRRArbiter[T](gen, n, 1)
 
 /** Hardware module that is used to sequence n producers into 1 consumer.
- Priority is given to lower producer
-
- Example usage:
-   val arb = Module(new Arbiter(2, UInt()))
-   arb.io.in(0) <> producer0.io.out
-   arb.io.in(1) <> producer1.io.out
-   consumer.io.in <> arb.io.out
- */
+  * Priority is given to lower producer.
+  *
+  * @example {{{
+  * val arb = Module(new Arbiter(2, UInt()))
+  * arb.io.in(0) <> producer0.io.out
+  * arb.io.in(1) <> producer1.io.out
+  * consumer.io.in <> arb.io.out
+  * }}}
+  */
 class Arbiter[T <: Data](gen: T, n: Int) extends Module {
   val io = new ArbiterIO(gen, n)