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sayma_amc: constrain pin, remove keep

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This commit is contained in:
Robert Jördens 2018-01-23 15:42:14 +00:00
parent ee14912042
commit e0e795f11c
1 changed files with 1 additions and 3 deletions
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4
artiq/gateware/targets/sayma_amc.py
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@ -55,6 +55,7 @@ class AD9154CRG(Module, AutoCSR):
self.clock_domains.cd_jesd = ClockDomain()
refclk_pads = platform.request("dac_refclk", 0)
platform.add_period_constraint(refclk_pads.p, 1e9/self.refclk_freq)
self.specials += [
Instance("IBUFDS_GTE3", i_CEB=0, p_REFCLK_HROW_CK_SEL=0b00,
i_I=refclk_pads.p, i_IB=refclk_pads.n,
@ -62,8 +63,6 @@ class AD9154CRG(Module, AutoCSR):
Instance("BUFG_GT", i_I=refclk2, o_O=self.cd_jesd.clk),
AsyncResetSynchronizer(self.cd_jesd, self.jreset.storage),
]
self.cd_jesd.clk.attr.add("keep")
platform.add_period_constraint(self.cd_jesd.clk, 1e9/self.refclk_freq)
jref = platform.request("dac_sysref")
self.specials += DifferentialInput(jref.p, jref.n, self.jref)
@ -85,7 +84,6 @@ class AD9154JESD(Module, AutoCSR):
phy = JESD204BPhyTX(
cpll, PhyPads(jesd_pads.txp[i], jesd_pads.txn[i]),
jesd_crg.fabric_freq, transceiver="gth")
phy.transmitter.cd_tx.clk.attr.add("keep")
platform.add_period_constraint(phy.transmitter.cd_tx.clk,
40*1e9/jesd_crg.linerate)
platform.add_false_path_constraints(