# DpgenConst
Keywords: dpgen

- Name : DpgenConst - Constant Macro-Generator
- Synopsys :

      Generate ( 'DpgenConst', modelname
               , param = { 'nbit'       : n
                         , 'const'      : constVal
                         , 'physical'   : True
                         , 'behavioral' : True
                         }
               )

- Description : Generates a `n` bits constant named `modelname`.
- Terminal Names :
  - q : the constant (output, `n` bit)
  - vdd : power
  - vss : ground
- Parameters : Parameters are given in the map `param`.
  - nbit (mandatory) : Defines the size of the generator
  - const (mandatory) : Defines the constant (string beginning with 0b, 0x or 0o functions of the basis)
  - physical (optional, default value : False) : In order to generate a layout
  - behavioral (optional, default value : False) : In order to generate a behavior
- Behavior :

      q <= constVal

- Example :

      from stratus import *

      class inst_const ( Model ) :

        def Interface ( self ) :
          self.o = SignalOut ( "o", 32 )

          self.vdd = VddIn ( "vdd" )
          self.vss = VssIn ( "vss" )

        def Netlist ( self ) :
          Generate ( 'DpgenConst', 'const_0x0000ffff'
                   , param = { 'nbit'     : 32
                             , 'const'    : "0x0000FFFF"
                             , 'physical' : True
                             }
                   )
          self.I = Inst ( 'const_0x0000ffff', 'inst'
                        , map = { 'q'   : self.o
                                , 'vdd' : self.vdd
                                , 'vss' : self.vss
                                }
                        )

        def Layout ( self ) :
          Place ( self.I, NOSYM, Ref(0, 0) )