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wrpll: support differential DDMTD inputs

This commit is contained in:
Sebastien Bourdeauducq 2019-12-07 18:18:57 +08:00
parent 3851a02a3a
commit da9237de53
1 changed files with 16 additions and 2 deletions
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18
artiq/gateware/drtio/wrpll/core.py
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@ -23,5 +23,19 @@ class WRPLL(Module, AutoCSR):
ddmtd_counter = Signal(N) ddmtd_counter = Signal(N)
self.sync.helper += ddmtd_counter.eq(ddmtd_counter + 1) self.sync.helper += ddmtd_counter.eq(ddmtd_counter + 1)
self.submodules.ddmtd_helper = DDMTD(ddmtd_counter, ddmtd_inputs.rec_clk) if hasattr(ddmtd_inputs, "rec_clk"):
self.submodules.ddmtd_main = DDMTD(ddmtd_counter, ddmtd_inputs.main_xo) ddmtd_input_rec_clk = ddmtd_inputs.rec_clk
else:
ddmtd_input_rec_clk = Signal()
self.specials += Instance("IBUFDS",
i_I=ddmtd_inputs.rec_clk_p, i_IB=ddmtd_inputs.rec_clk_n,
o_O=ddmtd_input_rec_clk)
if hasattr(ddmtd_inputs, "main_xo"):
ddmtd_input_main_xo = ddmtd_inputs.main_xo
else:
ddmtd_input_main_xo = Signal()
self.specials += Instance("IBUFDS",
i_I=ddmtd_inputs.main_xo_p, i_IB=ddmtd_inputs.main_xo_n,
o_O=ddmtd_input_main_xo)
self.submodules.ddmtd_helper = DDMTD(ddmtd_counter, ddmtd_input_rec_clk)
self.submodules.ddmtd_main = DDMTD(ddmtd_counter, ddmtd_input_main_xo)