Working on methodology of blockages, pins, and routing multiple pins.

compiler/router/grid.py

@@ -65,7 +65,7 @@ class grid:
             self.map[n].path=value
 
     def set_blockages(self,block_list,value=True):
-        debug.info(2,"Adding blockage list={0}".format(str(block_list)))
+        debug.info(3,"Adding blockage list={0}".format(str(block_list)))
         for n in block_list:
             self.set_blocked(n,value)
 
@@ -94,17 +94,17 @@ class grid:
 
         
     def add_source(self,track_list):
-        debug.info(2,"Adding source list={0}".format(str(track_list)))
+        debug.info(3,"Adding source list={0}".format(str(track_list)))
         for n in track_list:
-            debug.info(3,"Adding source ={0}".format(str(n)))
+            debug.info(4,"Adding source ={0}".format(str(n)))
             self.set_source(n)
             self.set_blocked(n,False)
 
 
     def add_target(self,track_list):
-        debug.info(2,"Adding target list={0}".format(str(track_list)))
+        debug.info(3,"Adding target list={0}".format(str(track_list)))
         for n in track_list:
-            debug.info(3,"Adding target ={0}".format(str(n)))                                
+            debug.info(4,"Adding target ={0}".format(str(n)))                                
             self.set_target(n)
             self.set_blocked(n,False)            
 

compiler/router/router.py

@@ -57,7 +57,6 @@ class router:
         self.ll = vector(self.boundary[0][0], self.boundary[0][1])
         self.ur = vector(self.boundary[1][0], self.boundary[1][1])
 
-            
     def clear_pins(self):
         """
         Convert the routed path to blockages.
@@ -67,7 +66,7 @@ class router:
         self.pin_groups = {}        
         self.pin_grids = {}
         self.pin_blockages = {}        
-        self.rg.reinit()
+        self.reinit()
         
     def set_top(self,top_name):
         """ If we want to route something besides the top-level cell."""
@@ -165,7 +164,7 @@ class router:
             
         self.convert_blockages()
             
-    def clear_pins(self):
+    def reinit(self):
         """
         Reset the source and destination pins to start a new routing.
         Convert the source/dest pins to blockages.
@@ -742,7 +741,22 @@ class router:
         for path in self.paths:
             self.rg.block_path(path)
             
-
+    def run_router(self, detour_scale):
+        """
+        This assumes the blockages, source, and target are all set up. 
+        """
+        # returns the path in tracks
+        (path,cost) = self.rg.route(detour_scale)
+        if path:
+            debug.info(1,"Found path: cost={0} ".format(cost))
+            debug.info(2,str(path))
+            self.add_route(path)
+        else:
+            self.write_debug_gds()
+            # clean up so we can try a reroute
+            self.reinit()
+            return False
+        return True
         
 # FIXME: This should be replaced with vector.snap_to_grid at some point
 

compiler/router/signal_router.py

@@ -78,17 +78,7 @@ class signal_router(router):
         self.add_pin(src,True)
         self.add_pin(dest,False)
 
-            
+        if not self.run_router(detour_scale):
-        # returns the path in tracks
-        (path,cost) = self.rg.route(detour_scale)
-        if path:
-            debug.info(1,"Found path: cost={0} ".format(cost))
-            debug.info(2,str(path))
-            self.add_route(path)
-        else:
-            self.write_debug_gds()
-            # clean up so we can try a reroute
-            self.clear_pins()
             return False
         
         self.write_debug_gds()

compiler/router/supply_grid.py

@@ -1,19 +1,22 @@
 import debug
 from vector3d import vector3d
 from grid import grid
+from signal_grid import signal_grid
 from grid_path import grid_path
 from direction import direction
 
 
-class supply_grid(grid):
+class supply_grid(signal_grid):
     """
-    A two layer routing map. Each cell can be blocked in the vertical
+    This routes a supply grid. It is derived from a signal grid because it still
-    or horizontal layer.
+    routes the pins to the supply rails using the same routines.
+    It has a few extra routines to support "waves" which are multiple track wide
+    directional routes (no bends).
     """
 
     def __init__(self, ll, ur, track_width):
         """ Create a routing map of width x height cells and 2 in the z-axis. """
-        grid.__init__(self, ll, ur, track_width)
+        signal_grid.__init__(self, ll, ur, track_width)
         
     def reinit(self):
         """ Reinitialize everything for a new route. """

compiler/router/supply_router.py

@@ -72,7 +72,10 @@ class supply_router(router):
         self.connect_supply_rail(gnd_name)
         self.route_pins_to_rails(gnd_name)
 
+        # Start fresh. Not the best for run-time, but simpler.
         self.clear_blockages()
+        
+        self.add_blockages()
         self.add_pin_blockages(gnd_name)
         self.route_supply_rails(vdd_name,1)
         self.connect_supply_rail(vdd_name)
@@ -175,67 +178,29 @@ class supply_router(router):
         This will route each of the pin components to the supply rails. 
         After it is done, the cells are added to the pin blockage list.
         """
+
+        # For every component
         for index in range(self.num_pin_components(pin_name)):
-            # Block all pin components first
+            
+            # Block all the pin components first
             self.add_component_blockages(pin_name)
-            # Add the single component of the pin as the source (unmarks it as a blockage too)
+            
+            # Add the single component of the pin as the source
+            # which unmarks it as a blockage too
             self.add_pin_component(pin_name,index,is_source=True)
+            
             # Add all of the rails as targets
+            # Don't add the other pins, but we could?
             self.add_supply_rail_target(pin_name)
-            #route_supply_pin(pin)
 
-
+            # Actually run the A* router
-
+            self.run_router(detour_scale=5)
-    def route_supply_pin(self, pin):
+            
-        """
+
-        This will take a single pin and route it to the appropriate supply rail.
+            
-        Do not allow other pins to be destinations so that everything is connected 
+
-        to the rails.
+                
-        """
+    
-
-        # source pin will be a specific layout pin
-        # target pin will be the rails only
-            
-        # returns the path in tracks
-        # (path,cost) = self.rg.route(detour_scale)
-        # if path:
-        #     debug.info(1,"Found path: cost={0} ".format(cost))
-        #     debug.info(2,str(path))
-        #     self.add_route(path)
-        #     return True
-        # else:
-        #     self.write_debug_gds()
-        #     # clean up so we can try a reroute
-        #     self.clear_pins()
-            
-        pass
-    
-        
-    # def add_route(self,path):
-    #     """ 
-    #     Add the current wire route to the given design instance.
-    #     """
-    #     debug.info(3,"Set path: " + str(path))
-
-    #     # Keep track of path for future blockages
-    #     self.paths.append(path)
-        
-    #     # This is marked for debug
-    #     self.rg.add_path(path)
-
-    #     # For debugging... if the path failed to route.
-    #     if False or path==None:
-    #         self.write_debug_gds()
-
-    #     # First, simplify the path for
-    #     #debug.info(1,str(self.path))        
-    #     contracted_path = self.contract_path(path)
-    #     debug.info(1,str(contracted_path))
-
-    #     # convert the path back to absolute units from tracks
-    #     abs_path = map(self.convert_point_to_units,contracted_path)
-    #     debug.info(1,str(abs_path))
-    #     self.cell.add_route(self.layers,abs_path)