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mark RTIO clock as asychronous to system clock

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Sebastien Bourdeauducq 2020-07-08 20:37:53 +08:00
parent 7ee67db8e3
commit 68045ce0c5
1 changed files with 4 additions and 0 deletions
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4
src/zc706.py
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@ -71,6 +71,10 @@ class ZC706(SoCCore):
self.submodules.rtio_crg = RTIOCRG(self.platform, self.ps7.cd_sys.clk) self.submodules.rtio_crg = RTIOCRG(self.platform, self.ps7.cd_sys.clk)
self.csr_devices.append("rtio_crg") self.csr_devices.append("rtio_crg")
self.platform.add_period_constraint(self.rtio_crg.cd_rtio.clk, 8.)
self.platform.add_false_path_constraints(
self.ps7.cd_sys.clk,
self.rtio_crg.cd_rtio.clk)
def add_rtio(self, rtio_channels): def add_rtio(self, rtio_channels):
self.submodules.rtio_tsc = rtio.TSC("async", glbl_fine_ts_width=3) self.submodules.rtio_tsc = rtio.TSC("async", glbl_fine_ts_width=3)