use ram for Sum

diff --git a/migScope/__init__.py b/migScope/__init__.py
index f96a03acde9c80f0f7f9ca0b1449a4e29918ecd5..e0d740556c45c5b18bcc325f6f42279a0c2be6a0 100644 (file)
--- a/migScope/__init__.py
+++ b/migScope/__init__.py
@@ -144,25 +144,31 @@ class Timer:
                return Fragment(comb, sync)
 
 class Sum:
-       def __init__(self,size=4,pipe=False):
-               self.size = size
+       def __init__(self,width=4,pipe=False):
+               self.width = width
                self.pipe = pipe
-               self.i = Array(Signal() for j in range(self.size))
+               
+               self.i = Signal(BV(self.width))
                self._o = Signal()
                self.o = Signal()
-
+               self._lut_port = MemoryPort(adr=self.i, dat_r=self._o)
+               
                self.prog = Signal()
-               self.prog_dat = Signal(BV(16))
+               self.prog_adr = Signal(BV(width))
+               self.prog_dat = Signal()
+               self._prog_port = MemoryPort(adr=self.prog_adr, we=self.prog, dat_w=self.prog_dat)
+               
+               self._mem = Memory(1, 2**self.width, self._lut_port, self._prog_port)
                
        def get_fragment(self):
                comb = []
                sync = []
-               comb +=[self.o.eq(optree("|", [self.i[j] for j in range(self.size)]))]
+               memories = [self._mem]
                if self.pipe:
                        sync += [self.o.eq(self._o)]
                else:
                        comb += [self.o.eq(self._o)]
-               return Fragment(comb=comb,sync=sync)
+               return Fragment(comb=comb,sync=sync,memories=memories)
                
 
 class Trigger: