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sdramphy/gensdrphy: fix rddata_en generation

This commit is contained in:
Sebastien Bourdeauducq 2014-08-08 21:41:07 +08:00
parent a2c7ff4c0c
commit 777ebb7875
1 changed files with 8 additions and 7 deletions
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15
misoclib/sdramphy/gensdrphy.py
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@ -72,11 +72,12 @@ class GENSDRPHY(Module):
drive_dq = Signal() drive_dq = Signal()
self.sync += sd_dq_out.eq(self.dfi.p0.wrdata), self.sync += sd_dq_out.eq(self.dfi.p0.wrdata),
self.specials += Tristate(pads.dq, sd_dq_out, drive_dq) self.specials += Tristate(pads.dq, sd_dq_out, drive_dq)
self.sync += If(self.dfi.p0.wrdata_en, self.sync += \
pads.dm.eq(self.dfi.p0.wrdata_mask) If(self.dfi.p0.wrdata_en,
).Else( pads.dm.eq(self.dfi.p0.wrdata_mask)
pads.dm.eq(0) ).Else(
) pads.dm.eq(0)
)
sd_dq_in_ps = Signal(d) sd_dq_in_ps = Signal(d)
self.sync.sys_ps += sd_dq_in_ps.eq(pads.dq) self.sync.sys_ps += sd_dq_in_ps.eq(pads.dq)
self.sync += self.dfi.p0.rddata.eq(sd_dq_in_ps) self.sync += self.dfi.p0.rddata.eq(sd_dq_in_ps)
@ -89,5 +90,5 @@ class GENSDRPHY(Module):
self.comb += drive_dq.eq(d_dfi_wrdata_en) self.comb += drive_dq.eq(d_dfi_wrdata_en)
rddata_sr = Signal(4) rddata_sr = Signal(4)
self.comb += self.dfi.p0.rddata_valid.eq(rddata_sr[0]) self.comb += self.dfi.p0.rddata_valid.eq(rddata_sr[3])
self.sync += rddata_sr.eq(Cat(self.dfi.p0.rddata_en, rddata_sr[1:])) self.sync += rddata_sr.eq(Cat(self.dfi.p0.rddata_en, rddata_sr[:3]))