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111 lines
4.1 KiB
Python
111 lines
4.1 KiB
Python
from migen.fhdl.std import *
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from migen.bank.description import *
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from migen.bank import wbgen
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from mibuild.generic_platform import *
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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
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from targets.kc705 import MiniSoC
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from artiq.gateware.soc import AMPSoC
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from artiq.gateware import rtio, ad9858, nist_qc1
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from artiq.gateware.rtio.phy import ttl_simple
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from artiq.gateware.rtio.phy.wishbone import RT2WB
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class _RTIOCRG(Module, AutoCSR):
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def __init__(self, platform, rtio_internal_clk):
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self._clock_sel = CSRStorage()
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self.clock_domains.cd_rtio = ClockDomain(reset_less=True)
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rtio_external_clk = Signal()
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user_sma_clock = platform.request("user_sma_clock")
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platform.add_period_constraint(user_sma_clock.p, 8.0)
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self.specials += Instance("IBUFDS",
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i_I=user_sma_clock.p, i_IB=user_sma_clock.n,
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o_O=rtio_external_clk)
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self.specials += Instance("BUFGMUX",
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i_I0=rtio_internal_clk,
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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)
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class NIST_QC1(MiniSoC, AMPSoC):
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csr_map = {
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"rtio": None, # mapped on Wishbone instead
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"rtiocrg": 13,
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"kernel_cpu": 14
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}
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csr_map.update(MiniSoC.csr_map)
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mem_map = {
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"rtio": 0x20000000, # (shadow @0xa0000000)
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"mailbox": 0x70000000 # (shadow @0xf0000000)
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}
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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,
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cpu_type=cpu_type, with_timer=False, **kwargs)
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AMPSoC.__init__(self)
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platform.add_extension(nist_qc1.fmc_adapter_io)
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self.submodules.leds = gpio.GPIOOut(Cat(
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platform.request("user_led", 0),
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platform.request("user_led", 1)))
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self.comb += [
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platform.request("ttl_l_tx_en").eq(1),
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platform.request("ttl_h_tx_en").eq(1)
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]
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# RTIO channels
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rtio_channels = []
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for i in range(2):
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phy = ttl_simple.Inout(platform.request("pmt", i))
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self.submodules += phy
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rtio_channels.append(rtio.Channel(phy.rtlink, ififo_depth=512))
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for i in range(16):
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phy = ttl_simple.Output(platform.request("ttl", i))
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self.submodules += phy
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rtio_channels.append(rtio.Channel(phy.rtlink))
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phy = ttl_simple.Output(platform.request("user_led", 2))
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self.submodules += phy
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rtio_channels.append(rtio.Channel(phy.rtlink))
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self.add_constant("RTIO_DDS_CHANNEL", len(rtio_channels))
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self.submodules.dds = RenameClockDomains(
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ad9858.AD9858(platform.request("dds")),
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"rio")
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phy = RT2WB(7, self.dds.bus)
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self.submodules += phy
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rtio_channels.append(rtio.Channel(phy.rtlink, ififo_depth=4))
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# 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,
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clk_freq=125000000)
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self.add_constant("RTIO_FINE_TS_WIDTH", self.rtio.fine_ts_width)
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if isinstance(platform.toolchain, XilinxVivadoToolchain):
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platform.add_platform_command("""
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create_clock -name rsys_clk -period 8.0 [get_nets {rsys_clk}]
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create_clock -name rio_clk -period 8.0 [get_nets {rio_clk}]
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set_false_path -from [get_clocks rsys_clk] -to [get_clocks rio_clk]
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set_false_path -from [get_clocks rio_clk] -to [get_clocks rsys_clk]
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""", rsys_clk=self.rtio.cd_rsys.clk, rio_clk=self.rtio.cd_rio.clk)
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# CPU connections
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rtio_csrs = self.rtio.get_csrs()
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self.submodules.rtiowb = wbgen.Bank(rtio_csrs)
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self.kernel_cpu.add_wb_slave(mem_decoder(self.mem_map["rtio"]),
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self.rtiowb.bus)
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self.add_csr_region("rtio", self.mem_map["rtio"] | 0x80000000, 32,
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rtio_csrs)
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default_subtarget = NIST_QC1
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