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vendor.lattice_ecp5: don't leave LUT inputs disconnected.

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This causes YosysHQ/nextpnr#301.

Fixes #136.
This commit is contained in:
whitequark 2019-07-07 02:30:56 +00:00
parent da1f58b7ae
commit cb02a452e9
1 changed files with 6 additions and 0 deletions
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6
nmigen/vendor/lattice_ecp5.py vendored
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@ -192,6 +192,9 @@ class LatticeECP5Platform(TemplatedPlatform):
m.submodules += Instance("LUT4",
p_INIT=0x5555 if invert else 0xaaaa,
i_A=a[bit],
i_B=Const(0),
i_C=Const(0),
i_D=Const(0),
o_Z=z[bit]
)
return a
@ -205,6 +208,9 @@ class LatticeECP5Platform(TemplatedPlatform):
m.submodules += Instance("LUT4",
p_INIT=0x5555 if invert else 0xaaaa,
i_A=a[bit],
i_B=Const(0),
i_C=Const(0),
i_D=Const(0),
o_Z=z[bit]
)
return z