migen/build/altera/common.py

   1 from migen.fhdl.module import Module
   2 from migen.fhdl.specials import Instance
   3 from migen.genlib.io import DifferentialInput, DifferentialOutput
   4
   5
   6 class AlteraDifferentialInputImpl(Module):
   7     def __init__(self, i_p, i_n, o):
   8         self.specials += Instance("ALT_INBUF_DIFF",
   9                                   name="ibuf_diff",
  10                                   i_i=i_p,
  11                                   i_ibar=i_n,
  12                                   o_o=o)
  13
  14
  15 class AlteraDifferentialInput:
  16     @staticmethod
  17     def lower(dr):
  18         return AlteraDifferentialInputImpl(dr.i_p, dr.i_n, dr.o)
  19
  20
  21 class AlteraDifferentialOutputImpl(Module):
  22     def __init__(self, i, o_p, o_n):
  23         self.specials += Instance("ALT_OUTBUF_DIFF",
  24                                   name="obuf_diff",
  25                                   i_i=i,
  26                                   o_o=o_p,
  27                                   o_obar=o_n)
  28
  29
  30 class AlteraDifferentialOutput:
  31     @staticmethod
  32     def lower(dr):
  33         return AlteraDifferentialOutputImpl(dr.i, dr.o_p, dr.o_n)
  34
  35
  36 altera_special_overrides = {
  37     DifferentialInput: AlteraDifferentialInput,
  38     DifferentialOutput: AlteraDifferentialOutput
  39 }