artiq/soc/targets/artiq_kc705.py

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from migen.fhdl.std import *
from migen.bank.description import *
from migen.bank import wbgen
from mibuild.generic_platform import *
from mibuild.xilinx.vivado import XilinxVivadoToolchain
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from misoclib.com import gpio
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from misoclib.soc import mem_decoder
from misoclib.cpu.peripherals import timer
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from targets.kc705 import MiniSoC
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from artiq.gateware.soc import AMPSoC
from artiq.gateware import rtio, ad9858, nist_qc1
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from artiq.gateware.rtio.phy import ttl_simple
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class _RTIOCRG(Module, AutoCSR):
def __init__(self, platform, rtio_internal_clk):
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self._clock_sel = CSRStorage()
self.clock_domains.cd_rtio = ClockDomain(reset_less=True)
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rtio_external_clk = Signal()
user_sma_clock = platform.request("user_sma_clock")
platform.add_period_constraint(user_sma_clock.p, 8.0)
self.specials += Instance("IBUFDS",
i_I=user_sma_clock.p, i_IB=user_sma_clock.n,
o_O=rtio_external_clk)
self.specials += Instance("BUFGMUX",
i_I0=rtio_internal_clk,
i_I1=rtio_external_clk,
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i_S=self._clock_sel.storage,
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o_O=self.cd_rtio.clk)
class NIST_QC1(MiniSoC, AMPSoC):
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csr_map = {
"rtio": None, # mapped on Wishbone instead
"rtiocrg": 13,
"kernel_cpu": 14
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}
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csr_map.update(MiniSoC.csr_map)
mem_map = {
"rtio": 0x20000000, # (shadow @0xa0000000)
"dds": 0x50000000, # (shadow @0xd0000000)
"mailbox": 0x70000000 # (shadow @0xf0000000)
}
mem_map.update(MiniSoC.mem_map)
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def __init__(self, platform, cpu_type="or1k", **kwargs):
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MiniSoC.__init__(self, platform,
cpu_type=cpu_type, with_timer=False, **kwargs)
AMPSoC.__init__(self)
platform.add_extension(nist_qc1.fmc_adapter_io)
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self.submodules.leds = gpio.GPIOOut(Cat(
platform.request("user_led", 0),
platform.request("user_led", 1)))
self.comb += [
platform.request("ttl_l_tx_en").eq(1),
platform.request("ttl_h_tx_en").eq(1)
]
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# RTIO channels
rtio_channels = []
for i in range(2):
phy = ttl_simple.Inout(platform.request("pmt", i))
self.submodules += phy
rtio_channels.append(rtio.Channel(phy.rtlink, ififo_depth=512))
for i in range(16):
phy = ttl_simple.Output(platform.request("ttl", i))
self.submodules += phy
rtio_channels.append(rtio.Channel(phy.rtlink))
phy = ttl_simple.Output(platform.request("user_led", 2))
self.submodules += phy
rtio_channels.append(rtio.Channel(phy.rtlink))
fud = Signal()
self.add_constant("RTIO_FUD_CHANNEL", len(rtio_channels))
phy = ttl_simple.Output(fud)
self.submodules += phy
rtio_channels.append(rtio.Channel(phy.rtlink))
# RTIO core
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self.submodules.rtiocrg = _RTIOCRG(platform, self.crg.pll_sys)
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self.submodules.rtio = rtio.RTIO(rtio_channels,
clk_freq=125000000)
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dds_pads = platform.request("dds")
self.submodules.dds = ad9858.AD9858(dds_pads)
self.comb += dds_pads.fud_n.eq(~fud)
if isinstance(platform.toolchain, XilinxVivadoToolchain):
platform.add_platform_command("""
create_clock -name rsys_clk -period 8.0 [get_nets {rsys_clk}]
create_clock -name rio_clk -period 8.0 [get_nets {rio_clk}]
set_false_path -from [get_clocks rsys_clk] -to [get_clocks rio_clk]
set_false_path -from [get_clocks rio_clk] -to [get_clocks rsys_clk]
""", rsys_clk=self.rtio.cd_rsys.clk, rio_clk=self.rtio.cd_rio.clk)
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# CPU connections
rtio_csrs = self.rtio.get_csrs()
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self.submodules.rtiowb = wbgen.Bank(rtio_csrs)
self.kernel_cpu.add_wb_slave(mem_decoder(self.mem_map["rtio"]),
self.rtiowb.bus)
self.add_csr_region("rtio", self.mem_map["rtio"] | 0x80000000, 32,
rtio_csrs)
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self.kernel_cpu.add_wb_slave(mem_decoder(self.mem_map["dds"]),
self.dds.bus)
self.add_memory_region("dds", self.mem_map["dds"] | 0x80000000, 64*4)
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default_subtarget = NIST_QC1