Making pdkname a variable in simple example
Encourage experimentation at top of file
import siliconcompiler # import python package
+pdkname = "freepdk45" # name of predefined pdk
chip = siliconcompiler.Chip() # create chip object
-chip.target("freepdk45") # load predefined target pdk
+chip.target(pdkname) # load predefined pdk settings
chip.node('import', 'surelog') # create import task
chip.node('syn', 'yosys') # create synthesis task
chip.node('floorplan', 'openroad') # create floorplan task
