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drtio: fix GTH clock domains

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This commit is contained in:
Sebastien Bourdeauducq 2017-12-23 07:21:44 +08:00
parent 1af21c0b29
commit f8c8f3fe26
1 changed files with 7 additions and 10 deletions
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17
artiq/gateware/drtio/transceiver/gth_ultrascale.py
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@ -1,3 +1,6 @@
from functools import reduce
from operator import or_
from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from migen.genlib.cdc import MultiReg
@ -237,16 +240,10 @@ class GTH(Module, TransceiverInterface):
TransceiverInterface.__init__(self, channel_interfaces)
# rtio clock domain (clock from gth tx0, ored reset from all gth txs)
self.comb += self.cd_rtio.clk.eq(ClockSignal("gth0_rtio_tx"))
rtio_rst = Signal()
for i in range(nchannels):
rtio_rst.eq(rtio_rst | ResetSignal("gth" + str(i) + "rtio_tx"))
new_rtio_rst = Signal()
rtio_rst = new_rtio_rst
self.comb += self.cd_rtio.rst.eq(rtio_rst)
# rtio_rx clock domains
self.comb += [
self.cd_rtio.clk.eq(self.gths[master].cd_rtio_tx.clk),
self.cd_rtio.rst.eq(reduce(or_, [gth.cd_rtio_tx.rst for gth in self.gths]))
]
for i in range(nchannels):
self.comb += [
getattr(self, "cd_rtio_rx" + str(i)).clk.eq(self.gths[i].cd_rtio_rx.clk),