Add serialization support for LoadMemoryFileType in LoadMemoryAnnotation (#1056)

* Add serialization support for LoadMemoryFileType in LoadMemoryAnnotation
Add custom LoadMemoryFileTypeSerializer.
Add test to verify LoadMemoryAnnotation can be correctly serialized/deserialized.

* Simplify and focus LoadMemoryAnnotation serialization/deserialization.
Respond to comments on earlier implementations.

* Add type FileType definition for current chisel3 code.

1 files changed, 13 insertions, 1 deletions

diff --git a/src/test/scala/firrtlTests/annotationTests/LoadMemoryAnnotationSpec.scala b/src/test/scala/firrtlTests/annotationTests/LoadMemoryAnnotationSpec.scala
index 15b12d52..c702df13 100644
--- a/src/test/scala/firrtlTests/annotationTests/LoadMemoryAnnotationSpec.scala
+++ b/src/test/scala/firrtlTests/annotationTests/LoadMemoryAnnotationSpec.scala
@@ -2,7 +2,7 @@
 
 package firrtlTests.annotationTests
 
-import firrtl.annotations.{CircuitName, ComponentName, LoadMemoryAnnotation, ModuleName}
+import firrtl.annotations._
 import org.scalatest.{FreeSpec, Matchers}
 
 class LoadMemoryAnnotationSpec extends FreeSpec with Matchers {
@@ -26,4 +26,16 @@ class LoadMemoryAnnotationSpec extends FreeSpec with Matchers {
       lma.getFileName should be("./target/scala-2.12/test-classes/init_mem_subdata")
     }
   }
+  "LoadMemoryAnnotation should be correctly parsed from a string" in {
+    val lma = new LoadMemoryAnnotation(
+      ComponentName("ram", ModuleName("ModuleMem", CircuitName("CircuitMem"))),
+      "CircuitMem.ModuleMem.ram.dat",
+      hexOrBinary = MemoryLoadFileType.Binary,
+      originalMemoryNameOpt = Some("memory")
+    )
+
+    val annoString = JsonProtocol.serializeTry(Seq(lma)).get
+    val loadedAnnos = JsonProtocol.deserializeTry(annoString).get
+    lma should equal(loadedAnnos.head)
+  }
 }