Added corrections to verilog source and configurations for the openlane

macro hardening and top level synthesis.  Removed old files that corresponded
to the caravan design and not to the openframe design.

README

@@ -161,3 +161,33 @@ Build notes:
 	Chances are good that this is due to the incorrect floorplan
 	DEF (tracks and sites do not cover the entire die area as
 	they should)?  Need to look at output.
+
+	Result---The placement actually covers the area in spite of
+	the incorrect list of tracks/sites, so that doesn't seem to
+	be the underlying problem.
+
+(23) Continuing 5/9/2023 after break due to travel.  Committed all work
+	so here's a recap:
+	Do:
+	setenv PDK_ROOT /usr/share/pdk
+	setenv PDK sky130A
+	cd openlane/openframe_project_wrapper
+	~/gits/openlane/flow.tcl -ignore_mismatches
+
+	(had updated sky130A PDK and needed to redo the "/// sta-blackbox"
+	comment line in sky130_sram_2kbyte_1rw1r_32x512_8.v)
+
+(24) Continuing 8/11/2023 after the openlane team worked over this.
+	Copied over all openlane configuration files.  The openlane
+	flow has now been divided into multiple blocks (picoRV32 core,
+	clock routing, DLL, and then the top level wrapper) which are
+	hardened hierarchically.  Macros were added which connect to the
+	VCCD1/VSSD1 busses (although preferably there should be additional
+	connections to VCCD/VSSD and VCCD2/VSSD2 for robustness).
+
+	Note that I am attempting to keep the *unbuilt* sources in the
+	original "main" repository branch, while working on a build in
+	a "build" branch.  It should be possible to keep a minimum set of
+	files in the (committed) upstream repository while being able to
+	generate the final layout through a series of known repeatable
+	steps. 

lef/vccd1_connection.lef

@@ -0,0 +1,16 @@
+VERSION 5.7 ;
+  NOWIREEXTENSIONATPIN ON ;
+  DIVIDERCHAR "/" ;
+  BUSBITCHARS "[]" ;
+MACRO vccd1_connection
+  CLASS BLOCK ;
+  FOREIGN vccd1_connection ;
+  ORIGIN 0.000 0.000 ;
+  SIZE 45.400 BY 74.600 ;
+  OBS
+      LAYER met3 ;
+        RECT 0.105 0.100 45.340 74.300 ;
+  END
+END vccd1_connection
+END LIBRARY
+

lef/vssd1_connection.lef

@@ -0,0 +1,16 @@
+VERSION 5.7 ;
+  NOWIREEXTENSIONATPIN ON ;
+  DIVIDERCHAR "/" ;
+  BUSBITCHARS "[]" ;
+MACRO vssd1_connection
+  CLASS BLOCK ;
+  FOREIGN vssd1_connection ;
+  ORIGIN 0.000 0.000 ;
+  SIZE 45.400 BY 74.600 ;
+  OBS
+      LAYER met3 ;
+        RECT 0.105 0.100 45.340 74.300 ;
+  END
+END vssd1_connection
+END LIBRARY
+