migen/build/lattice/platform.py

   1 from migen.build.generic_platform import GenericPlatform
   2 from migen.build.lattice import common, diamond
   3
   4
   5 class LatticePlatform(GenericPlatform):
   6     bitstream_ext = ".bit"
   7
   8     def __init__(self, *args, toolchain="diamond", **kwargs):
   9         GenericPlatform.__init__(self, *args, **kwargs)
  10         if toolchain == "diamond":
  11             self.toolchain = diamond.LatticeDiamondToolchain()
  12         else:
  13             raise ValueError("Unknown toolchain")
  14
  15     def get_verilog(self, *args, special_overrides=dict(), **kwargs):
  16         so = dict(common.lattice_special_overrides)
  17         so.update(special_overrides)
  18         return GenericPlatform.get_verilog(self, *args, special_overrides=so, **kwargs)
  19
  20     def build(self, *args, **kwargs):
  21         return self.toolchain.build(self, *args, **kwargs)
  22
  23     def add_period_constraint(self, clk, period):
  24         if hasattr(clk, "p"):
  25             clk = clk.p
  26         self.toolchain.add_period_constraint(self, clk, period)