M-Labs
/
artiq
mirror of https://github.com/m-labs/artiq
2
0
Fork 1
Code Issues Projects Releases Wiki Activity

kasli: disable DRTIO IBUFDS_GTE2 until Si5324 is initialized

pull/954/head
Sebastien Bourdeauducq 2018-02-19 00:48:37 +08:00
parent 94c20dfd4d
commit a93decdef2
1 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
artiq/gateware/targets/kasli.py
View File

@ -333,6 +333,8 @@ class Master(MiniSoC, AMPSoC):
sys_clk_freq=self.clk_freq,
rtio_clk_freq=rtio_clk_freq)
self.csr_devices.append("drtio_transceiver")
self.sync += self.disable_si5324_ibuf.eq(
~self.drtio_transceiver.stable_clkin.storage)
self.submodules.drtio0 = ClockDomainsRenamer({"rtio_rx": "rtio_rx0"})(
DRTIOMaster(self.drtio_transceiver.channels[0]))
@ -379,16 +381,20 @@ class Master(MiniSoC, AMPSoC):
# Never running out of stupid features, GTs on A7 make you pack
# unrelated transceiver PLLs into one GTPE2_COMMON yourself.
def create_qpll(self):
# The GTP acts up if you send any glitch to its
# clock input, even while the PLL is held in reset.
self.disable_si5324_ibuf = Signal(reset=1)
self.disable_si5324_ibuf.attr.add("keep")
si5324_clkout = self.platform.request("si5324_clkout")
si5324_clkout_buf = Signal()
self.specials += Instance("IBUFDS_GTE2",
i_CEB=0,
i_CEB=self.disable_si5324_ibuf,
i_I=si5324_clkout.p, i_IB=si5324_clkout.n,
o_O=si5324_clkout_buf)
# Note precisely the rules Xilinx made up:
# refclksel=0b001 GTREFCLK0 selected
# refclksel=0b010 GTREFCLK1 selected
# but if only one clock used, then it must be 001.
# but if only one clock is used, then it must be 001.
qpll_drtio_settings = QPLLSettings(
refclksel=0b001,
fbdiv=4,
@ -433,10 +439,12 @@ class Satellite(BaseSoC):
self.submodules.rtio_moninj = rtio.MonInj(rtio_channels)
self.csr_devices.append("rtio_moninj")
disable_si5324_ibuf = Signal(reset=1)
disable_si5324_ibuf.attr.add("keep")
si5324_clkout = platform.request("si5324_clkout")
si5324_clkout_buf = Signal()
self.specials += Instance("IBUFDS_GTE2",
i_CEB=0,
i_CEB=disable_si5324_ibuf,
i_I=si5324_clkout.p, i_IB=si5324_clkout.n,
o_O=si5324_clkout_buf)
qpll_drtio_settings = QPLLSettings(
@ -454,6 +462,9 @@ class Satellite(BaseSoC):
sys_clk_freq=self.clk_freq,
rtio_clk_freq=rtio_clk_freq)
self.csr_devices.append("drtio_transceiver")
self.sync += disable_si5324_ibuf.eq(
~self.drtio_transceiver.stable_clkin.storage)
rx0 = ClockDomainsRenamer({"rtio_rx": "rtio_rx0"})
self.submodules.drtio0 = rx0(DRTIOSatellite(
self.drtio_transceiver.channels[0], rtio_channels))