Fixes freechipsproject#151: assert ready for arbiter inputs

Author: wunderabt

3.2_interlude.ipynb

@@ -171,11 +171,13 @@
     "  }) { c =>\n",
     "    c.io.in(0).valid.poke(false.B)\n",
     "    c.io.in(1).valid.poke(false.B)\n",
+    "    c.io.out.ready.poke(false.B)\n",
     "    println(s\"Start:\")\n",
     "    println(s\"\\tin(0).ready=${c.io.in(0).ready.peek().litValue}, in(1).ready=${c.io.in(1).ready.peek().litValue}\")\n",
     "    println(s\"\\tout.valid=${c.io.out.valid.peek().litValue}, out.bits=${c.io.out.bits.peek().litValue}\")\n",
     "    c.io.in(1).valid.poke(true.B)  // Valid input 1\n",
     "    c.io.in(1).bits.poke(42.U)\n",
+    "    c.io.out.ready.poke(true.B)\n",
     "    // What do you think the output will be?\n",
     "    println(s\"valid input 1:\")\n",
     "    println(s\"\\tin(0).ready=${c.io.in(0).ready.peek().litValue}, in(1).ready=${c.io.in(1).ready.peek().litValue}\")\n",
@@ -509,4 +511,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 1
-}
+}