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phy/s7ddrphy: fix dynamic rd/wrphase and dq/dqs_oe_delay for nphases=2.

This commit is contained in:
Florent Kermarrec 2020-10-07 18:53:52 +02:00
parent b16e9bfd5c
commit e5f4f828ad
1 changed files with 4 additions and 4 deletions
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8
litedram/phy/s7ddrphy.py
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@ -82,8 +82,8 @@ class S7DDRPHY(Module, AutoCSR):
self._wdly_dqs_rst = CSR() self._wdly_dqs_rst = CSR()
self._wdly_dqs_inc = CSR() self._wdly_dqs_inc = CSR()
self._rdphase = CSRStorage(2, reset=rdphase) self._rdphase = CSRStorage(int(math.log2(nphases)), reset=rdphase)
self._wrphase = CSRStorage(2, reset=wrphase) self._wrphase = CSRStorage(int(math.log2(nphases)), reset=wrphase)
# PHY settings ----------------------------------------------------------------------------- # PHY settings -----------------------------------------------------------------------------
self.settings = PhySettings( self.settings = PhySettings(
@ -206,7 +206,7 @@ class S7DDRPHY(Module, AutoCSR):
dqs_oe = Signal() dqs_oe = Signal()
dqs_preamble = Signal() dqs_preamble = Signal()
dqs_postamble = Signal() dqs_postamble = Signal()
dqs_oe_delay = TappedDelayLine(ntaps=2) dqs_oe_delay = TappedDelayLine(ntaps=2 if nphases == 4 else 1)
dqs_pattern = DQSPattern( dqs_pattern = DQSPattern(
preamble = dqs_preamble, preamble = dqs_preamble,
postamble = dqs_postamble, postamble = dqs_postamble,
@ -298,7 +298,7 @@ class S7DDRPHY(Module, AutoCSR):
# DQ --------------------------------------------------------------------------------------- # DQ ---------------------------------------------------------------------------------------
dq_oe = Signal() dq_oe = Signal()
dq_oe_delay = TappedDelayLine(ntaps=2) dq_oe_delay = TappedDelayLine(ntaps=2 if nphases == 4 else 1)
self.submodules += dq_oe_delay self.submodules += dq_oe_delay
self.comb += dq_oe_delay.input.eq(dqs_preamble | dq_oe | dqs_postamble) self.comb += dq_oe_delay.input.eq(dqs_preamble | dq_oe | dqs_postamble)
for i in range(databits): for i in range(databits):