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fhdl.specials: add compatibility shim for Tristate.

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whitequark 2019-01-19 02:19:06 +00:00
parent 3ed519383c
commit e3b5b2acc8
1 changed files with 16 additions and 3 deletions
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19
nmigen/compat/fhdl/specials.py
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@ -4,7 +4,7 @@ from ...tools import deprecated, extend
from ...hdl.ast import * from ...hdl.ast import *
from ...hdl.mem import Memory as NativeMemory from ...hdl.mem import Memory as NativeMemory
from ...hdl.ir import Fragment from ...hdl.ir import Fragment
from ...lib.io import TSTriple as NativeTSTriple from ...lib.io import TSTriple as NativeTSTriple, Tristate as NativeTristate
from .module import Module as CompatModule from .module import Module as CompatModule
@ -18,11 +18,24 @@ class CompatTSTriple(NativeTSTriple):
reset_o=reset_o, reset_oe=reset_oe, reset_i=reset_i, reset_o=reset_o, reset_oe=reset_oe, reset_i=reset_i,
name=name) name=name)
def get_tristate(self, target):
raise NotImplementedError("TODO") class CompatTristate(NativeTristate):
def __init__(self, target, o, oe, i=None):
triple = TSTriple()
triple.o = o
triple.oe = oe
if i is not None:
triple.i = i
super().__init__(triple, target)
@property
@deprecated("instead of `Tristate.target`, use `Tristate.io`")
def target(self):
return self.io
TSTriple = CompatTSTriple TSTriple = CompatTSTriple
Tristate = CompatTristate
(READ_FIRST, WRITE_FIRST, NO_CHANGE) = range(3) (READ_FIRST, WRITE_FIRST, NO_CHANGE) = range(3)