Hardware
/
litedram
mirror of https://github.com/enjoy-digital/litedram.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

phy/s7ddrphy: also add bitslip on dqs.

This commit is contained in:
Florent Kermarrec 2020-10-08 18:17:47 +02:00
parent 0ac23fde52
commit 83d70a3eb9
1 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
litedram/phy/s7ddrphy.py
View File

@ -212,8 +212,9 @@ class S7DDRPHY(Module, AutoCSR):
postamble = dqs_postamble,
wlevel_en = self._wlevel_en.storage,
wlevel_strobe = self._wlevel_strobe.re,
register = not with_odelay)
self.submodules += dqs_oe_delay, dqs_pattern
register = False) # FIXME: fix not with_odelay case.
dqs_bitslip = BitSlip(8, i=dqs_pattern.o, cycles=1)
self.submodules += dqs_oe_delay, dqs_pattern, dqs_bitslip
self.comb += dqs_oe_delay.input.eq(dqs_preamble | dqs_oe | dqs_postamble)
for i in range(databits//8):
dqs_o_no_delay = Signal()
@ -228,7 +229,7 @@ class S7DDRPHY(Module, AutoCSR):
i_RST = ResetSignal() | self._rst.storage,
i_CLK = ClockSignal(ddr_clk) if with_odelay else ClockSignal(ddr_clk+"_dqs"),
i_CLKDIV = ClockSignal(),
**{f"i_D{n+1}": dqs_pattern.o[n] for n in range(8)},
**{f"i_D{n+1}": dqs_bitslip.o[n] for n in range(8)},
i_OCE = 1,
o_OFB = dqs_o_no_delay if with_odelay else Signal(),
o_OQ = Signal() if with_odelay else dqs_o_no_delay,