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prepared for rtioclkmultiplier/serdes in artiq

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pull/140/head
mwojcik 1 year ago
parent 0f8a7f3a4c
commit df5436409d
2 changed files with 7 additions and 78 deletions
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  1. 36
      src/gateware/kasli_soc.py
  2. 49
      src/gateware/zc706.py

36
src/gateware/kasli_soc.py
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@ -15,7 +15,7 @@ from misoc.integration import cpu_interface
from artiq.coredevice import jsondesc
from artiq.gateware import rtio, eem_7series
from artiq.gateware.rtio.phy import ttl_simple
from artiq.gateware.rtio.xilinx_clocking import RTIOClockMultiplier
from artiq.gateware.drtio.transceiver import gtx_7series
from artiq.gateware.drtio.siphaser import SiPhaser7Series
from artiq.gateware.drtio.rx_synchronizer import XilinxRXSynchronizer
@ -75,36 +75,6 @@ class RTIOCRG(Module, AutoCSR):
MultiReg(pll_locked, self.pll_locked.status)
]
class _RTIOClockMultiplier(Module, AutoCSR):
def __init__(self, rtio_clk_freq):
self.pll_reset = CSRStorage(reset=1)
self.pll_locked = CSRStatus()
self.clock_domains.cd_rtiox4 = ClockDomain(reset_less=True)
# See "Global Clock Network Deskew Using Two BUFGs" in ug472.
clkfbout = Signal()
clkfbin = Signal()
rtiox4_clk = Signal()
pll_locked = Signal()
self.specials += [
Instance("MMCME2_BASE",
p_CLKIN1_PERIOD=1e9/rtio_clk_freq,
i_CLKIN1=ClockSignal("rtio"),
i_RST=self.pll_reset.storage,
o_LOCKED=pll_locked,
p_CLKFBOUT_MULT_F=8.0, p_DIVCLK_DIVIDE=1,
o_CLKFBOUT=clkfbout, i_CLKFBIN=clkfbin,
p_CLKOUT0_DIVIDE_F=2.0, o_CLKOUT0=rtiox4_clk,
),
Instance("BUFG", i_I=clkfbout, o_O=clkfbin),
Instance("BUFG", i_I=rtiox4_clk, o_O=self.cd_rtiox4.clk),
MultiReg(pll_locked, self.pll_locked.status)
]
eem_iostandard_dict = {
0: "LVDS_25",
@ -238,7 +208,7 @@ class GenericMaster(SoCCore):
self.csr_devices.append("drtio_transceiver")
self.crg = self.ps7 # HACK for eem_7series to find the clock
self.submodules.rtio_crg = _RTIOClockMultiplier(rtio_clk_freq)
self.submodules.rtio_crg = RTIOClockMultiplier(rtio_clk_freq)
self.csr_devices.append("rtio_crg")
self.rtio_channels = []
@ -350,7 +320,7 @@ class GenericSatellite(SoCCore):
platform.add_platform_command("set_input_jitter clk_fpga_0 0.24")
self.crg = self.ps7 # HACK for eem_7series to find the clock
self.submodules.rtio_crg = _RTIOClockMultiplier(rtio_clk_freq)
self.submodules.rtio_crg = RTIOClockMultiplier(rtio_clk_freq)
self.csr_devices.append("rtio_crg")
data_pads = [platform.request("sfp", i) for i in range(4)]

49
src/gateware/zc706.py
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@ -15,7 +15,7 @@ from misoc.cores import gpio
from artiq.gateware import rtio, nist_clock, nist_qc2
from artiq.gateware.rtio.phy import ttl_simple, ttl_serdes_7series, dds, spi2
from artiq.gateware.rtio.xilinx_clocking import RTIOClockMultiplier, fix_serdes_timing_path
from artiq.gateware.drtio.transceiver import gtx_7series
from artiq.gateware.drtio.siphaser import SiPhaser7Series
from artiq.gateware.drtio.rx_synchronizer import XilinxRXSynchronizer
@ -26,6 +26,7 @@ import analyzer
import acpki
import drtio_aux_controller
class RTIOCRG(Module, AutoCSR):
def __init__(self, platform, rtio_internal_clk):
self.clock_sel = CSRStorage()
@ -70,48 +71,6 @@ class RTIOCRG(Module, AutoCSR):
]
class _RTIOClockMultiplier(Module, AutoCSR):
def __init__(self, rtio_clk_freq):
self.pll_reset = CSRStorage(reset=1)
self.pll_locked = CSRStatus()
self.clock_domains.cd_rtiox4 = ClockDomain(reset_less=True)
# See "Global Clock Network Deskew Using Two BUFGs" in ug472.
clkfbout = Signal()
clkfbin = Signal()
rtiox4_clk = Signal()
pll_locked = Signal()
self.specials += [
Instance("MMCME2_BASE",
p_CLKIN1_PERIOD=1e9/rtio_clk_freq,
i_CLKIN1=ClockSignal("rtio"),
i_RST=self.pll_reset.storage,
o_LOCKED=pll_locked,
p_CLKFBOUT_MULT_F=8.0, p_DIVCLK_DIVIDE=1,
o_CLKFBOUT=clkfbout, i_CLKFBIN=clkfbin,
p_CLKOUT0_DIVIDE_F=2.0, o_CLKOUT0=rtiox4_clk,
),
Instance("BUFG", i_I=clkfbout, o_O=clkfbin),
Instance("BUFG", i_I=rtiox4_clk, o_O=self.cd_rtiox4.clk),
MultiReg(pll_locked, self.pll_locked.status)
]
def fix_serdes_timing_path(platform):
# ignore timing of path from OSERDESE2 through the pad to ISERDESE2
platform.add_platform_command(
"set_false_path -quiet "
"-through [get_pins -filter {{REF_PIN_NAME == OQ || REF_PIN_NAME == TQ}} "
"-of [get_cells -filter {{REF_NAME == OSERDESE2}}]] "
"-to [get_pins -filter {{REF_PIN_NAME == D}} "
"-of [get_cells -filter {{REF_NAME == ISERDESE2}}]]"
)
# The NIST backplanes require setting VADJ to 3.3V by reprogramming the power supply.
# This also changes the I/O standard for some on-board LEDs.
leds_fmc33 = [
@ -288,7 +247,7 @@ class _MasterBase(SoCCore):
platform.add_false_path_constraints(
self.ps7.cd_sys.clk, gtx0.txoutclk, gtx.rxoutclk)
self.submodules.rtio_crg = _RTIOClockMultiplier(self.sys_clk_freq)
self.submodules.rtio_crg = RTIOClockMultiplier(self.sys_clk_freq)
self.csr_devices.append("rtio_crg")
fix_serdes_timing_path(self.platform)
@ -437,7 +396,7 @@ class _SatelliteBase(SoCCore):
platform.add_false_path_constraints(
self.ps7.cd_sys.clk, gtx.rxoutclk)
self.submodules.rtio_crg = _RTIOClockMultiplier(self.sys_clk_freq)
self.submodules.rtio_crg = RTIOClockMultiplier(self.sys_clk_freq)
self.csr_devices.append("rtio_crg")
fix_serdes_timing_path(self.platform)

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