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sma_spi: free up user_sma pins

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This commit is contained in:
Robert Jördens 2017-04-07 14:42:41 +02:00
parent 2c7c6143ab
commit 555b3c38c1
1 changed files with 78 additions and 0 deletions
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78
artiq/gateware/targets/kc705_sma_spi.py
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@ -5,8 +5,11 @@ import argparse
from migen import *
from migen.build.generic_platform import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from migen.genlib.cdc import MultiReg
from misoc.targets.kc705 import soc_kc705_args, soc_kc705_argdict
from misoc.integration.builder import builder_args, builder_argdict
from misoc.interconnect.csr import *
from artiq.gateware.amp import build_artiq_soc
from artiq.gateware import rtio
@ -16,6 +19,56 @@ from artiq.gateware.rtio.phy import ttl_simple, spi
from .kc705_dds import _NIST_Ions
class _RTIOCRG(Module, AutoCSR):
def __init__(self, platform, rtio_internal_clk):
self._clock_sel = CSRStorage()
self._pll_reset = CSRStorage(reset=1)
self._pll_locked = CSRStatus()
self.clock_domains.cd_rtio = ClockDomain()
self.clock_domains.cd_rtiox4 = ClockDomain(reset_less=True)
# 10 MHz when using 125MHz input
self.clock_domains.cd_ext_clkout = ClockDomain(reset_less=True)
rtio_external_clk = Signal()
pll_locked = Signal()
rtio_clk = Signal()
rtiox4_clk = Signal()
ext_clkout_clk = Signal()
self.specials += [
Instance("PLLE2_ADV",
p_STARTUP_WAIT="FALSE", o_LOCKED=pll_locked,
p_REF_JITTER1=0.01,
p_CLKIN1_PERIOD=8.0, p_CLKIN2_PERIOD=8.0,
i_CLKIN1=rtio_internal_clk, i_CLKIN2=rtio_external_clk,
# Warning: CLKINSEL=0 means CLKIN2 is selected
i_CLKINSEL=~self._clock_sel.storage,
# VCO @ 1GHz when using 125MHz input
p_CLKFBOUT_MULT=8, p_DIVCLK_DIVIDE=1,
i_CLKFBIN=self.cd_rtio.clk,
i_RST=self._pll_reset.storage,
o_CLKFBOUT=rtio_clk,
p_CLKOUT0_DIVIDE=2, p_CLKOUT0_PHASE=0.0,
o_CLKOUT0=rtiox4_clk,
p_CLKOUT1_DIVIDE=50, p_CLKOUT1_PHASE=0.0,
o_CLKOUT1=ext_clkout_clk),
Instance("BUFG", i_I=rtio_clk, o_O=self.cd_rtio.clk),
Instance("BUFG", i_I=rtiox4_clk, o_O=self.cd_rtiox4.clk),
Instance("BUFG", i_I=ext_clkout_clk, o_O=self.cd_ext_clkout.clk),
AsyncResetSynchronizer(self.cd_rtio, ~pll_locked),
MultiReg(pll_locked, self._pll_locked.status)
]
_sma_spi = [
("sma_spi", 0,
Subsignal("clk", Pins("Y23")), # user_sma_gpio_p
@ -63,6 +116,31 @@ class SMA_SPI(_NIST_Ions):
self.add_rtio(rtio_channels)
def add_rtio(self, rtio_channels):
self.submodules.rtio_crg = _RTIOCRG(self.platform, self.crg.cd_sys.clk)
self.csr_devices.append("rtio_crg")
self.submodules.rtio_core = rtio.Core(rtio_channels)
self.csr_devices.append("rtio_core")
self.submodules.rtio = rtio.KernelInitiator()
self.submodules.rtio_dma = rtio.DMA(self.get_native_sdram_if())
self.register_kernel_cpu_csrdevice("rtio")
self.register_kernel_cpu_csrdevice("rtio_dma")
self.submodules.cri_con = rtio.CRIInterconnectShared(
[self.rtio.cri, self.rtio_dma.cri],
[self.rtio_core.cri])
self.submodules.rtio_moninj = rtio.MonInj(rtio_channels)
self.csr_devices.append("rtio_moninj")
self.rtio_crg.cd_rtio.clk.attr.add("keep")
self.platform.add_period_constraint(self.rtio_crg.cd_rtio.clk, 8.)
self.platform.add_false_path_constraints(
self.crg.cd_sys.clk,
self.rtio_crg.cd_rtio.clk)
self.submodules.rtio_analyzer = rtio.Analyzer(self.rtio_core.cri,
self.get_native_sdram_if())
self.csr_devices.append("rtio_analyzer")
def main():
parser = argparse.ArgumentParser(