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targets/artiq_kc705: add false path between rsys_clk and rio_clk (reduce P&R on AMP from 40 minutes to 5 minutes :)

This commit is contained in:
Florent Kermarrec 2015-04-11 13:15:59 +02:00 committed by Sebastien Bourdeauducq
parent 24b2bd7b6f
commit bdd02a064e
1 changed files with 8 additions and 0 deletions
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8
soc/targets/artiq_kc705.py
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@ -2,6 +2,7 @@ from migen.fhdl.std import *
from migen.bank.description import * from migen.bank.description import *
from migen.bank import wbgen from migen.bank import wbgen
from mibuild.generic_platform import * from mibuild.generic_platform import *
from mibuild.xilinx.vivado import XilinxVivadoToolchain
from misoclib.com import gpio from misoclib.com import gpio
from misoclib.soc import mem_decoder from misoclib.soc import mem_decoder
@ -72,6 +73,13 @@ class _Peripherals(MiniSoC):
self.submodules.dds = ad9858.AD9858(dds_pads) self.submodules.dds = ad9858.AD9858(dds_pads)
self.comb += dds_pads.fud_n.eq(~fud) self.comb += dds_pads.fud_n.eq(~fud)
if isinstance(platform.toolchain, XilinxVivadoToolchain):
platform.add_platform_command("""
create_clock -name rsys_clk -period 8.0 [get_nets rsys_clk]
create_clock -name rio_clk -period 8.0 [get_nets rio_clk]
set_false_path -from [get_clocks rsys_clk] -to [get_clocks rio_clk]
set_false_path -from [get_clocks rio_clk] -to [get_clocks rsys_clk]
""")
class UP(_Peripherals): class UP(_Peripherals):
def __init__(self, *args, **kwargs): def __init__(self, *args, **kwargs):