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build/lattice/common.py: added Tristate support for ECP5 when build with diamond

This commit is contained in:
Gwenhael Goavec-Merou 2024-11-17 11:32:33 +01:00
parent 8041969e00
commit 211ce59df4
1 changed files with 19 additions and 0 deletions
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19
litex/build/lattice/common.py
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@ -137,10 +137,29 @@ class LatticeECP5DifferentialOutput:
def lower(dr):
return LatticeECP5DifferentialOutputImpl(dr.i, dr.o_p, dr.o_n)
# ECP5 Special Tristate ----------------------------------------------------------------------------
class LatticeECP5TristateImpl(Module):
def __init__(self, io, o, oe, i):
nbits, sign = value_bits_sign(io)
for bit in range(nbits):
self.specials += Instance("BB",
io_B = io[bit] if nbits > 1 else io,
i_I = o[bit] if nbits > 1 else o,
o_O = i[bit] if nbits > 1 else i,
i_T = ~oe
)
class LatticeECP5Tristate(Module):
@staticmethod
def lower(dr):
return LatticeECP5TristateImpl(dr.target, dr.o, dr.oe, dr.i)
# ECP5 Special Overrides ---------------------------------------------------------------------------
lattice_ecp5_special_overrides = {
AsyncResetSynchronizer: LatticeECP5AsyncResetSynchronizer,
Tristate: LatticeECP5Tristate,
SDRInput: LatticeECP5SDRInput,
SDROutput: LatticeECP5SDROutput,
DDRInput: LatticeECP5DDRInput,