48 lines
1.3 KiB
Python
48 lines
1.3 KiB
Python
from .. import *
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__all__ = ["TSTriple", "Tristate"]
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class TSTriple:
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def __init__(self, shape=None, min=None, max=None, reset_o=0, reset_oe=0, reset_i=0,
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name=None):
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self.o = Signal(shape, min=min, max=max, reset=reset_o,
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name=None if name is None else name + "_o")
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self.oe = Signal(reset=reset_oe,
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name=None if name is None else name + "_oe")
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self.i = Signal(shape, min=min, max=max, reset=reset_i,
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name=None if name is None else name + "_i")
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def __len__(self):
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return len(self.o)
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def get_fragment(self, platform):
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return Fragment()
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def get_tristate(self, io):
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return Tristate(self, io)
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class Tristate:
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def __init__(self, triple, io):
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self.triple = triple
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self.io = io
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def get_fragment(self, platform):
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if hasattr(platform, "get_tristate"):
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return platform.get_tristate(self.triple, self.io)
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m = Module()
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m.d.comb += self.triple.i.eq(self.io)
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m.submodules += Instance("$tribuf",
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p_WIDTH=len(self.io),
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i_EN=self.triple.oe,
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i_A=self.triple.o,
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o_Y=self.io,
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)
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f = m.lower(platform)
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f.flatten = True
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return f
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