mirror of https://github.com/m-labs/artiq.git
147 lines
5.7 KiB
Python
147 lines
5.7 KiB
Python
from fractions import Fraction
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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 misoclib.com import gpio
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from misoclib.soc import mem_decoder
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from misoclib.mem.sdram.core.minicon import MiniconSettings
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from targets.pipistrello import BaseSoC
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from artiq.gateware.soc import AMPSoC
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from artiq.gateware import rtio, nist_qc1
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from artiq.gateware.rtio.phy import ttl_simple, dds
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class _RTIOCRG(Module, AutoCSR):
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def __init__(self, platform, clk_freq):
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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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f = Fraction(125*1000*1000, clk_freq)
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rtio_internal_clk = Signal()
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self.specials += Instance("DCM_CLKGEN",
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p_CLKFXDV_DIVIDE=2,
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p_CLKFX_DIVIDE=f.denominator,
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p_CLKFX_MD_MAX=float(f),
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p_CLKFX_MULTIPLY=f.numerator,
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p_CLKIN_PERIOD=1e9/clk_freq,
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p_SPREAD_SPECTRUM="NONE",
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p_STARTUP_WAIT="FALSE",
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i_CLKIN=ClockSignal(),
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o_CLKFX=rtio_internal_clk,
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i_FREEZEDCM=0,
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i_RST=ResetSignal())
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rtio_external_clk = platform.request("pmt", 2)
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# ISE infers constraints for the internal clock
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# and propagates them through the BUFGMUX. Adding this:
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# platform.add_period_constraint(rtio_external_clk, 8.0)
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# seems to confuse it
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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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platform.add_platform_command("""
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NET "{int_clk}" TNM_NET = "GRPint_clk";
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NET "sys_clk" TNM_NET = "GRPsys_clk";
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TIMESPEC "TSfix_ise1" = FROM "GRPint_clk" TO "GRPsys_clk" TIG;
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TIMESPEC "TSfix_ise2" = FROM "GRPsys_clk" TO "GRPint_clk" TIG;
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""", int_clk=rtio_internal_clk, ext_clk=rtio_external_clk)
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class NIST_QC1(BaseSoC, AMPSoC):
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csr_map = {
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"rtio": None, # mapped on Wishbone instead
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"rtio_crg": 13,
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"kernel_cpu": 14,
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"rtio_moninj": 15
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}
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csr_map.update(BaseSoC.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(BaseSoC.mem_map)
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def __init__(self, platform, cpu_type="or1k", **kwargs):
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BaseSoC.__init__(self, platform,
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cpu_type=cpu_type,
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sdram_controller_settings=MiniconSettings(l2_size=64*1024),
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with_timer=False, **kwargs)
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AMPSoC.__init__(self)
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platform.toolchain.ise_commands += """
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trce -v 12 -fastpaths -tsi {build_name}.tsi -o {build_name}.twr {build_name}.ncd {build_name}.pcf
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"""
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platform.add_extension(nist_qc1.papilio_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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platform.request("user_led", 2),
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platform.request("user_led", 3),
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))
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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.from_phy(phy, ififo_depth=512,
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ofifo_depth=4))
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for i in range(15):
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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.from_phy(phy, ofifo_depth=256))
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phy = ttl_simple.Output(platform.request("ext_led", 0))
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self.submodules += phy
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rtio_channels.append(rtio.Channel.from_phy(phy, ofifo_depth=4))
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phy = ttl_simple.Output(platform.request("user_led", 4))
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self.submodules += phy
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rtio_channels.append(rtio.Channel.from_phy(phy, ofifo_depth=4))
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self.add_constant("RTIO_REGULAR_TTL_COUNT", len(rtio_channels))
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phy = ttl_simple.ClockGen(platform.request("ttl", 15))
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self.submodules += phy
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rtio_channels.append(rtio.Channel.from_phy(phy))
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self.add_constant("RTIO_DDS_CHANNEL", len(rtio_channels))
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self.add_constant("DDS_CHANNEL_COUNT", 8)
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self.add_constant("DDS_AD9858")
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phy = dds.AD9858(platform.request("dds"), 8)
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self.submodules += phy
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rtio_channels.append(rtio.Channel.from_phy(phy,
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ofifo_depth=512,
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ififo_depth=4))
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# RTIO core
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self.submodules.rtio_crg = _RTIOCRG(platform, self.clk_freq)
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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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self.add_constant("DDS_RTIO_CLK_RATIO", 8 >> self.rtio.fine_ts_width)
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self.submodules.rtio_moninj = rtio.MonInj(rtio_channels)
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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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