X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=VHDL.hs;h=9516fdd2eb137f0bc75900e13a98df52df70b191;hb=7bb29e6c00a94229f48663afb6e128d24b3ad7f9;hp=b23e5f3117acc6481e37062d2816c28754365d46;hpb=20fbdf46508998bd11da03f3abd6e8725508b0a1;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

diff --git a/VHDL.hs b/VHDL.hs
index b23e5f3..9516fdd 100644
--- a/VHDL.hs
+++ b/VHDL.hs
@@ -15,10 +15,24 @@ import Outputable ( showSDoc, ppr )
 import qualified ForSyDe.Backend.VHDL.AST as AST
 
 import VHDLTypes
+import Flatten
 import FlattenTypes
 import TranslatorTypes
 import Pretty
 
+getDesignFile :: VHDLState AST.DesignFile
+getDesignFile = do
+  -- Extract the library units generated from all the functions in the
+  -- session.
+  funcs <- getFuncs
+  let units = concat $ map getLibraryUnits funcs
+  let context = [
+        AST.Library $ mkVHDLId "IEEE",
+        AST.Use $ (AST.NSimple $ mkVHDLId "IEEE.std_logic_1164") AST.:.: AST.All]
+  return $ AST.DesignFile 
+    context
+    units
+  
 -- | Create an entity for a given function
 createEntity ::
   HsFunction        -- | The function signature
@@ -45,9 +59,13 @@ createEntity hsfunc fdata =
       in
         setEntity hsfunc entity'
   where
-    mkMap :: Eq id => [(id, SignalInfo)] -> id -> (AST.VHDLId, AST.TypeMark)
+    mkMap :: Eq id => [(id, SignalInfo)] -> id -> Maybe (AST.VHDLId, AST.TypeMark)
     mkMap sigmap id =
-      (mkVHDLId nm, vhdl_ty ty)
+      if isPortSigUse $ sigUse info
+        then
+          Just (mkVHDLId nm, vhdl_ty ty)
+        else
+          Nothing
       where
         info = Maybe.fromMaybe
           (error $ "Signal not found in the name map? This should not happen!")
@@ -57,7 +75,7 @@ createEntity hsfunc fdata =
           (sigName info)
         ty = sigTy info
 
--- | Create the VHDL AST for an entity
+  -- | Create the VHDL AST for an entity
 createEntityAST ::
   HsFunction            -- | The signature of the function we're working with
   -> [VHDLSignalMap]    -- | The entity's arguments
@@ -70,17 +88,25 @@ createEntityAST hsfunc args res =
     vhdl_id = mkEntityId hsfunc
     ports = concatMap (mapToPorts AST.In) args
             ++ mapToPorts AST.Out res
+            ++ clk_port
     mapToPorts :: AST.Mode -> VHDLSignalMap -> [AST.IfaceSigDec] 
     mapToPorts mode m =
-      map (mkIfaceSigDec mode) (Foldable.toList m)
+      Maybe.catMaybes $ map (mkIfaceSigDec mode) (Foldable.toList m)
+    -- Add a clk port if we have state
+    clk_port = if hasState hsfunc
+      then
+        [AST.IfaceSigDec (mkVHDLId "clk") AST.In VHDL.std_logic_ty]
+      else
+        []
 
 -- | Create a port declaration
 mkIfaceSigDec ::
   AST.Mode                         -- | The mode for the port (In / Out)
-  -> (AST.VHDLId, AST.TypeMark)    -- | The id and type for the port
-  -> AST.IfaceSigDec               -- | The resulting port declaration
+  -> Maybe (AST.VHDLId, AST.TypeMark)    -- | The id and type for the port
+  -> Maybe AST.IfaceSigDec               -- | The resulting port declaration
 
-mkIfaceSigDec mode (id, ty) = AST.IfaceSigDec id mode ty
+mkIfaceSigDec mode (Just (id, ty)) = Just $ AST.IfaceSigDec id mode ty
+mkIfaceSigDec _ Nothing = Nothing
 
 -- | Generate a VHDL entity name for the given hsfunc
 mkEntityId hsfunc =
@@ -109,21 +135,44 @@ createArchitecture hsfunc fdata =
                       (getEntityId fdata)
       -- Create signal declarations for all signals that are not in args and
       -- res
-      let sig_decs = [mkSigDec info | (id, info) <- sigs, (all (id `Foldable.notElem`) (res:args)) ]
+      let sig_decs = Maybe.catMaybes $ map (mkSigDec . snd) sigs
       -- Create component instantiations for all function applications
       insts <- mapM (mkCompInsSm sigs) apps
+      let procs = map mkStateProcSm (getOwnStates hsfunc flatfunc)
       let insts' = map AST.CSISm insts
-      let arch = AST.ArchBody (mkVHDLId "structural") (AST.NSimple entity_id) (map AST.BDISD sig_decs) insts'
+      let procs' = map AST.CSPSm procs
+      let arch = AST.ArchBody (mkVHDLId "structural") (AST.NSimple entity_id) (map AST.BDISD sig_decs) (insts' ++ procs')
       setArchitecture hsfunc arch
 
-mkSigDec :: SignalInfo -> AST.SigDec
+mkStateProcSm :: (Int, SignalInfo, SignalInfo) -> AST.ProcSm
+mkStateProcSm (num, old, new) =
+  AST.ProcSm label [clk] [statement]
+  where
+    label       = mkVHDLId $ "state_" ++ (show num)
+    clk         = mkVHDLId "clk"
+    rising_edge = AST.NSimple $ mkVHDLId "rising_edge"
+    wform       = AST.Wform [AST.WformElem (AST.PrimName $ AST.NSimple $ getSignalId new) Nothing]
+    assign      = AST.SigAssign (AST.NSimple $ getSignalId old) wform
+    rising_edge_clk = AST.PrimFCall $ AST.FCall rising_edge [Nothing AST.:=>: (AST.ADName $ AST.NSimple clk)]
+    statement   = AST.IfSm rising_edge_clk [assign] [] Nothing
+
+mkSigDec :: SignalInfo -> Maybe AST.SigDec
 mkSigDec info =
-    AST.SigDec (mkVHDLId name) (vhdl_ty ty) Nothing
+  let use = sigUse info in
+  if isInternalSigUse use || isStateSigUse use then
+    Just $ AST.SigDec (getSignalId info) (vhdl_ty ty) Nothing
+  else
+    Nothing
   where
-    name = Maybe.fromMaybe
+    ty = sigTy info
+
+-- | Creates a VHDL Id from a named SignalInfo. Errors out if the SignalInfo
+--   is not named.
+getSignalId :: SignalInfo -> AST.VHDLId
+getSignalId info =
+    mkVHDLId $ Maybe.fromMaybe
       (error $ "Unnamed signal? This should not happen!")
       (sigName info)
-    ty = sigTy info
 
 -- | Transforms a flat function application to a VHDL component instantiation.
 mkCompInsSm ::
@@ -153,7 +202,7 @@ mkAssocElems ::
 
 mkAssocElems sigmap app entity =
     -- Create the actual AssocElems
-    zipWith mkAssocElem ports sigs
+    Maybe.catMaybes $ zipWith mkAssocElem ports sigs
   where
     -- Turn the ports and signals from a map into a flat list. This works,
     -- since the maps must have an identical form by definition. TODO: Check
@@ -163,7 +212,7 @@ mkAssocElems sigmap app entity =
     arg_sigs  = (concat (map Foldable.toList (appArgs app)))
     res_sigs  = Foldable.toList (appRes app)
     -- Extract the id part from the (id, type) tuple
-    ports     = (map fst (arg_ports ++ res_ports)) 
+    ports     = (map (fmap fst) (arg_ports ++ res_ports)) 
     -- Translate signal numbers into names
     sigs      = (map (lookupSigName sigmap) (arg_sigs ++ res_sigs))
 
@@ -179,8 +228,9 @@ lookupSigName sigs sig = name
       (sigName info)
 
 -- | Create an VHDL port -> signal association
-mkAssocElem :: AST.VHDLId -> String -> AST.AssocElem
-mkAssocElem port signal = Just port AST.:=>: (AST.ADName (AST.NSimple (mkVHDLId signal))) 
+mkAssocElem :: Maybe AST.VHDLId -> String -> Maybe AST.AssocElem
+mkAssocElem (Just port) signal = Just $ Just port AST.:=>: (AST.ADName (AST.NSimple (mkVHDLId signal))) 
+mkAssocElem Nothing _ = Nothing
 
 -- | Extracts the generated entity id from the given funcdata
 getEntityId :: FuncData -> Maybe AST.VHDLId
@@ -210,6 +260,10 @@ getLibraryUnits (hsfunc, fdata) =
 bit_ty :: AST.TypeMark
 bit_ty = AST.unsafeVHDLBasicId "Bit"
 
+-- | The VHDL std_logic
+std_logic_ty :: AST.TypeMark
+std_logic_ty = AST.unsafeVHDLBasicId "std_logic"
+
 -- Translate a Haskell type to a VHDL type
 vhdl_ty :: Type.Type -> AST.TypeMark
 vhdl_ty ty = Maybe.fromMaybe