HalfAdder example in Chisel

build.sbt

scalaVersion := "2.11.8"
libraryDependencies += "edu.berkeley.cs" %% "chisel" % "latest.release"
libraryDependencies += "org.scalatest" %% "scalatest" % "2.2.6" % "test"

HalfAdder.scala

package com.example.adder

import Chisel._

class HalfAdder extends Module {
  val io = new Bundle {
    val a = Bool(INPUT)
    val b = Bool(INPUT)
    val s = Bool(OUTPUT)
    val c = Bool(OUTPUT)
  }
  io.s := io.a ^ io.b
  io.c := io.a & io.b
}

class HalfAdderTester(c: HalfAdder) extends Tester(c) {
  for (i <- 0 to 1) {
    for (j <- 0 to 1) {
      poke(c.io.a, i)
      poke(c.io.b, j)
      expect(c.io.s, (i ^ j) == 1)
      expect(c.io.c, (i & j) == 1)
      step(1)
    }
  }
}

object HalfAdderBuilder {
  def s = Array[String]("--backend", "v", "--genHarness")
  def t = Array[String]("--backend", "c", "--compile", "--test", "--genHarness")

  def main(args: Array[String]): Unit = {
    chiselMain(s, () => Module(new HalfAdder))
    // chiselMainTest(t, () => Module(new HalfAdder)) { c => new HalfAdderTester(c) }
  }
}