Added pins to the ptx class. Modified pin class to do lazy write of GDS shapes to allow removal of pins.

compiler/hierarchy_layout.py

@@ -172,6 +172,9 @@ class layout:
         
         self.add_layout_pin(text, layer, ll_offset, width, height)
         
+    def remove_layout_pin(self, text):
+        """Delete a labeled pin (or all pins of the same name)"""
+        self.pin_map[text]=[]
         
     def add_layout_pin(self, text, layer, offset, width=None, height=None):
         """Create a labeled pin """
@@ -179,14 +182,7 @@ class layout:
             width=drc["minwidth_{0}".format(layer)]
         if height==None:
             height=drc["minwidth_{0}".format(layer)]
-        self.add_rect(layer=layer,
+        
-                      offset=offset,
-                      width=width,
-                      height=height)
-        self.add_label(text=text,
-                       layer=layer,
-                       offset=offset)
-
         new_pin = pin_layout(text, [offset,offset+vector(width,height)], layer)
 
         try:
@@ -384,6 +380,9 @@ class layout:
             i.gds_write_file(newLayout)
         for i in self.objs:
             i.gds_write_file(newLayout)
+        for pin_name in self.pin_map.keys():
+            for pin in self.pin_map[pin_name]:
+                pin.gds_write_file(newLayout)
         self.visited = True
 
     def gds_write(self, gds_name):

compiler/path.py

@@ -4,6 +4,20 @@ import debug
 from vector import vector
 from utils import snap_to_grid
 
+def create_rectilinear_route(my_list):
+    """ Add intermediate nodes if it isn't rectilinear. Also skip
+        repeated nodes. Also, convert to vector if the aren't."""
+    pl = [snap_to_grid(x) for x in my_list]
+    
+    my_list = []
+    for index in range(len(pl) - 1):
+        if pl[index] != pl[index + 1]:
+            my_list.append(vector(pl[index]))
+        if (pl[index][0] != pl[index + 1][0]) and (pl[index][1] != pl[index + 1][1]):
+            my_list.append(vector(pl[index][0], pl[index + 1][1]))
+    my_list.append(vector(pl[-1]))
+    return my_list
+        
 class path():
     """
     Object metal path; given the layer type
@@ -27,23 +41,15 @@ class path():
 
 
     def create_layout(self):
-        self.create_rectilinear_route()
+        self.create_rectilinear()
         self.connect_corner()
         self.create_rectangles()
         # wires and paths should not be offset to (0,0)
 
-    def create_rectilinear_route(self):
+    def create_rectilinear(self):
         """ Add intermediate nodes if it isn't rectilinear. Also skip
         repeated nodes. Also, convert to vector if the aren't."""
-        pl = [snap_to_grid(x) for x in self.position_list]
+        self.position_list = create_rectilinear_route(self.position_list)
-
-        self.position_list = []
-        for index in range(len(pl) - 1):
-            if pl[index] != pl[index + 1]:
-                self.position_list.append(vector(pl[index]))
-            if (pl[index][0] != pl[index + 1][0]) and (pl[index][1] != pl[index + 1][1]):
-                self.position_list.append(vector(pl[index][0], pl[index + 1][1]))
-        self.position_list.append(vector(pl[-1]))
 
     def connect_corner(self):
         """ Add a corner square at every corner of the path."""

compiler/pin_layout.py

@@ -1,3 +1,5 @@
+import debug
+from tech import GDS
 from vector import vector
 from tech import layer
 
@@ -142,3 +144,21 @@ class pin_layout:
         """ Bottom center point """
         return vector(0.5*(self.rect[0].x+self.rect[1].x),self.rect[0].y)
 
+
+    def gds_write_file(self, newLayout):
+        """Writes the pin shape and label to GDS"""
+        debug.info(4, "writing pin (" + str(self.layer) + "):" 
+                   + str(self.width()) + "x" + str(self.height()) + " @ " + str(self.ll()))
+        newLayout.addBox(layerNumber=layer[self.layer],
+                         purposeNumber=0,
+                         offsetInMicrons=self.ll(),
+                         width=self.width(),
+                         height=self.height(),
+                         center=False)
+        newLayout.addText(text=self.name,
+                          layerNumber=layer[self.layer],
+                          purposeNumber=0,
+                          offsetInMicrons=self.ll(),
+                          magnification=GDS["zoom"],
+                          rotate=None)
+    

compiler/ptx.py

@@ -3,6 +3,7 @@ import debug
 from tech import drc, info, spice
 from vector import vector
 from contact import contact
+import path
 import re
 
 class ptx(design.design):
@@ -146,10 +147,13 @@ class ptx(design.design):
                               - self.poly_positions[0].x
         poly_connect_position = self.poly_positions[0] - vector(0, self.poly_width)
         if len(self.poly_positions) > 1:
-            self.add_rect(layer="poly",
+            self.remove_layout_pin("G") # only keep the main pin
-                           offset=poly_connect_position,
+            self.add_layout_pin(text="G",
-                           width=poly_connect_length,
+                                layer="poly",
-                           height=drc["minwidth_poly"])
+                                offset=poly_connect_position,
+                                width=poly_connect_length,
+                                height=drc["minwidth_poly"])
+
             self.poly_connect_index = len(self.objs) - 1
 
         # change the name so it is unique and specifies drain/srouce (p) routed
@@ -204,11 +208,27 @@ class ptx(design.design):
         # allows one to connect the source and drains
         self.source_connect_index = None
         if self.source_positions:
+            self.remove_layout_pin("S") # remove the individual connections
+            self.source_positions = path.create_rectilinear_route(self.source_positions)
             self.add_path(("metal1"), self.source_positions)
+            # The source positions are odd since the second one is always redundant
+            # so we must use the THIRD one
+            self.add_center_layout_pin(text="S",
+                                       layer="metal1",
+                                       start=self.source_positions[2]-vector(0.5*drc["minwidth_metal1"],0),
+                                       end=self.source_positions[-2]+vector(0.5*drc["minwidth_metal1"],0))
             self.source_connect_index = len(self.insts) - 1
         self.drain_connect_index = None
         if self.drain_positions:
+            self.remove_layout_pin("D") # remove the individual connections
+            self.drain_positions = path.create_rectilinear_route(self.drain_positions)
             self.add_path(("metal1"), self.drain_positions)
+            # The source positions are odd since the second one is always redundant            
+            # so we must use the THIRD one
+            self.add_center_layout_pin(text="D",
+                                       layer="metal1",
+                                       start=self.drain_positions[2]-vector(0.5*drc["minwidth_metal1"],0),
+                                       end=self.drain_positions[-2]+vector(0.5*drc["minwidth_metal1"],0))
             self.drain_connect_index = len(self.insts) - 1
             
     def add_poly(self):
@@ -219,10 +239,11 @@ class ptx(design.design):
         self.poly_positions = []
         # following poly(s)
         for i in range(0, self.mults):
-            self.add_rect(layer="poly",
+            self.add_layout_pin(text="G",
-                          offset=[poly_xoffset, poly_yoffset],
+                                layer="poly",
-                          width=self.poly_width,
+                                offset=[poly_xoffset, poly_yoffset],
-                          height=self.poly_height)
+                                width=self.poly_width,
+                                height=self.poly_height)
             self.poly_positions.append(vector(poly_xoffset, poly_yoffset))
             poly_xoffset += self.mults_poly_to_poly + drc["minwidth_poly"]
 
@@ -294,9 +315,15 @@ class ptx(design.design):
         contact_xoffset = 0
         contact_yoffset = (self.active_height - self.active_contact.height) / 2
         offset = vector(contact_xoffset, contact_yoffset)
-        self.add_contact(layers=("active", "contact", "metal1"),
+        contact=self.add_contact(layers=("active", "contact", "metal1"),
-                         offset=offset,
+                                 offset=offset,
-                         size=(1, self.num_contacts))
+                                 size=(1, self.num_contacts))
+        # source are even
+        self.add_layout_pin(text="S",
+                            layer="metal1",
+                            offset=offset+contact.second_layer_position,
+                            width=contact.second_layer_width,
+                            height=contact.second_layer_height)
         self.active_contact_positions.append(offset)
 
         # middle contact columns
@@ -306,9 +333,16 @@ class ptx(design.design):
                               - (drc["minwidth_contact"] / 2) - \
                               self.active_contact.via_layer_position.x
             offset = vector(contact_xoffset, contact_yoffset)
-            self.add_contact(layers=("active", "contact", "metal1"),
+            contact=self.add_contact(layers=("active", "contact", "metal1"),
-                             offset=offset,
+                                     offset=offset,
-                             size=(1, self.num_contacts))
+                                     size=(1, self.num_contacts))
+            # source are even, drain are odd
+            name = "S" if i%2==1 else "D"
+            self.add_layout_pin(text=name,
+                                layer="metal1",
+                                offset=offset+contact.second_layer_position,
+                                width=contact.second_layer_width,
+                                height=contact.second_layer_height)
 
             self.active_contact_positions.append(offset)
 
@@ -317,9 +351,16 @@ class ptx(design.design):
                           + self.poly_width + drc["contact_to_poly"] - \
                           self.active_contact.via_layer_position.x
         offset = vector(contact_xoffset, contact_yoffset)
-        self.add_contact(layers=("active", "contact", "metal1"),
+        contact=self.add_contact(layers=("active", "contact", "metal1"),
-                         offset=offset,
+                                 offset=offset,
-                         size=(1, self.num_contacts))
+                                 size=(1, self.num_contacts))
+        # source are even, drain are odd
+        name = "D" if self.mults%2==1 else "S" 
+        self.add_layout_pin(text=name,
+                            layer="metal1",
+                            offset=offset+contact.second_layer_position,
+                            width=contact.second_layer_width,
+                            height=contact.second_layer_height)
         self.active_contact_positions.append(offset)
 
 

compiler/tests/03_ptx_3finger_nmos_test.py

@@ -27,7 +27,9 @@ class ptx_test(unittest.TestCase):
         debug.info(2, "Checking three fingers NMOS")
         fet = ptx.ptx(width=tech.drc["minwidth_tx"],
                       mults=3,
-                      tx_type="nmos")
+                      tx_type="nmos",
+                      connect_active=True,
+                      connect_poly=True)
         self.local_check(fet)
 
         OPTS.check_lvsdrc = True

compiler/tests/03_ptx_3finger_pmos_test.py

@@ -27,7 +27,9 @@ class ptx_test(unittest.TestCase):
         debug.info(2, "Checking three fingers PMOS")
         fet = ptx.ptx(width=tech.drc["minwidth_tx"],
                       mults=3,
-                      tx_type="pmos")
+                      tx_type="pmos",
+                      connect_active=True,
+                      connect_poly=True)
         self.local_check(fet)
 
         OPTS.check_lvsdrc = True