sense_amp: Allow custom pin names

we don't want to propagate the sense amp's bl/br names out of the
sense_amp_array. Thus the sense_amp_array gets them named as
"bl"/"br" again.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>

compiler/base/custom_cell_properties.py

@@ -120,7 +120,10 @@ class cell_properties():
                                     'bl' : 'bl',
                                     'br' : 'br',
                                     'en' : 'en'})
-
+        self._sense_amp = _cell({'bl'   : 'bl',
+                                 'br'   : 'br',
+                                 'dout' : 'dout',
+                                 'en'   : 'en'})
 
     @property
     def bitcell(self):
@@ -141,3 +144,7 @@ class cell_properties():
     @property
     def write_driver(self):
         return self._write_driver
+
+    @property
+    def sense_amp(self):
+        return self._sense_amp

compiler/modules/sense_amp.py

@@ -9,6 +9,7 @@ import design
 import debug
 import utils
 from tech import GDS,layer, parameter,drc
+from tech import cell_properties as props
 from globals import OPTS
 import logical_effort
 
@@ -19,8 +20,12 @@ class sense_amp(design.design):
     the technology library.
     Sense amplifier to read a pair of bit-lines.
     """
-
-    pin_names = ["bl", "br", "dout", "en", "vdd", "gnd"]
+    pin_names = [props.sense_amp.pin.bl,
+                 props.sense_amp.pin.br,
+                 props.sense_amp.pin.dout,
+                 props.sense_amp.pin.en,
+                 props.sense_amp.pin.vdd,
+                 props.sense_amp.pin.gnd]
     type_list = ["INPUT", "INPUT", "OUTPUT", "INPUT", "POWER", "GROUND"]
     if not OPTS.netlist_only:
         (width,height) = utils.get_libcell_size("sense_amp", GDS["unit"], layer["boundary"])
@@ -30,18 +35,18 @@ class sense_amp(design.design):
         pin_map = []
 
     def get_bl_names(self):
-        return "bl"
+        return props.sense_amp.pin.bl
 
     def get_br_names(self):
-        return "br"
+        return props.sense_amp.pin.br
 
     @property
     def dout_name(self):
-        return "dout"
+        return props.sense_amp.pin.dout
 
     @property
     def en_name(self):
-        return "en"
+        return props.sense_amp.pin.en
 
     def __init__(self, name):
         design.design.__init__(self, name)

compiler/modules/sense_amp_array.py

@@ -34,11 +34,11 @@ class sense_amp_array(design.design):
             self.create_layout()
 
     def get_bl_name(self):
-        bl_name = self.amp.get_bl_names()
+        bl_name = "bl"
         return bl_name
 
     def get_br_name(self):
-        br_name = self.amp.get_br_names()
+        br_name = "br"
         return br_name
 
     @property