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siphaser: add false path between sys_clk and mmcm_freerun_output

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This commit is contained in:
Sebastien Bourdeauducq 2018-03-29 10:55:41 +08:00
parent 4229c045f4
commit 493d2a653f
2 changed files with 6 additions and 4 deletions
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5
artiq/gateware/targets/kasli.py
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@ -791,8 +791,9 @@ class _SatelliteBase(BaseSoC):
self.config["RTIO_FREQUENCY"] = str(rtio_clk_freq/1e6)
self.submodules.siphaser = SiPhaser7Series(
si5324_clkin=platform.request("si5324_clkin"),
si5324_clkout_fabric=platform.request("si5324_clkout_fabric")
)
si5324_clkout_fabric=platform.request("si5324_clkout_fabric"))
platform.add_false_path_constraints(
self.crg.cd_sys.clk, self.siphaser.mmcm_freerun_output)
self.csr_devices.append("siphaser")
i2c = self.platform.request("i2c")
self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])

5
artiq/gateware/targets/sayma_amc.py
View File

@ -439,10 +439,11 @@ class Satellite(BaseSoC):
self.config["RTIO_FREQUENCY"] = str(rtio_clk_freq/1e6)
self.submodules.siphaser = SiPhaser7Series(
si5324_clkin=platform.request("si5324_clkin"),
si5324_clkout_fabric=platform.request("si5324_clkout_fabric")
)
si5324_clkout_fabric=platform.request("si5324_clkout_fabric"))
platform.add_platform_command("set_property CLOCK_DEDICATED_ROUTE FALSE [get_nets {mmcm_ps}]",
mmcm_ps=self.siphaser.mmcm_ps_output)
platform.add_false_path_constraints(
self.crg.cd_sys.clk, self.siphaser.mmcm_freerun_output)
self.csr_devices.append("siphaser")
self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324").rst_n)
self.csr_devices.append("si5324_rst_n")