Skip to content

Commit

Permalink
kc705: add period constraints on false path clocks
Browse files Browse the repository at this point in the history
sbourdeauducq committed Oct 30, 2016
1 parent 9b9933d commit ad414a7
Showing 1 changed file with 3 additions and 0 deletions.
3 changes: 3 additions & 0 deletions misoc/targets/kc705.py
Original file line number Diff line number Diff line change
@@ -124,6 +124,9 @@ def __init__(self, *args, **kwargs):

self.crg.cd_sys.clk.attr.add("keep")
self.ethphy.crg.cd_eth_tx.clk.attr.add("keep")
# period constraints are required here because of vivado
self.platform.add_period_constraint(self.crg.cd_sys.clk, 8.0)
self.platform.add_period_constraint(self.ethphy.crg.cd_eth_tx.clk, 8.0)
self.platform.add_false_path_constraints(
self.crg.cd_sys.clk,
self.ethphy.crg.cd_eth_tx.clk, eth_clocks.rx)

0 comments on commit ad414a7

Please sign in to comment.