from fractions import Fraction from migen.fhdl.std import * from migen.bank.description import * from migen.bank import wbgen from migen.genlib.resetsync import AsyncResetSynchronizer from migen.genlib.cdc import MultiReg from misoclib.com import gpio from misoclib.soc import mem_decoder from misoclib.mem.sdram.core.minicon import MiniconSettings from targets.pipistrello import BaseSoC from artiq.gateware.soc import AMPSoC from artiq.gateware import rtio, nist_qc1 from artiq.gateware.rtio.phy import ttl_simple, ttl_serdes_spartan6, dds class _RTIOCRG(Module, AutoCSR): def __init__(self, platform, clk_freq): 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) self.clock_domains.cd_rtiox8 = ClockDomain(reset_less=True) self.rtiox4_stb = Signal() self.rtiox8_stb = Signal() rtio_f = 125*1000*1000 f = Fraction(rtio_f, clk_freq) rtio_internal_clk = Signal() rtio_external_clk = Signal() pmt2 = platform.request("pmt", 2) dcm_locked = Signal() rtio_clk = Signal() pll_locked = Signal() pll = Signal(3) pll_fb = Signal() self.specials += [ Instance("IBUFG", i_I=pmt2, o_O=rtio_external_clk), Instance("DCM_CLKGEN", p_CLKFXDV_DIVIDE=2, p_CLKFX_DIVIDE=f.denominator, p_CLKFX_MD_MAX=float(f), p_CLKFX_MULTIPLY=f.numerator, p_CLKIN_PERIOD=1e9/clk_freq, p_SPREAD_SPECTRUM="NONE", p_STARTUP_WAIT="FALSE", i_CLKIN=ClockSignal(), o_CLKFX=rtio_internal_clk, i_FREEZEDCM=0, i_RST=ResetSignal(), o_LOCKED=dcm_locked), Instance("BUFGMUX", i_I0=rtio_internal_clk, i_I1=rtio_external_clk, i_S=self._clock_sel.storage, o_O=rtio_clk), Instance("PLL_ADV", p_SIM_DEVICE="SPARTAN6", p_BANDWIDTH="OPTIMIZED", p_COMPENSATION="INTERNAL", p_REF_JITTER=.01, p_CLK_FEEDBACK="CLKFBOUT", i_DADDR=0, i_DCLK=0, i_DEN=0, i_DI=0, i_DWE=0, i_RST=self._pll_reset.storage | ~dcm_locked, i_REL=0, p_DIVCLK_DIVIDE=1, p_CLKFBOUT_MULT=8, p_CLKFBOUT_PHASE=0., i_CLKINSEL=1, i_CLKIN1=rtio_clk, i_CLKIN2=0, p_CLKIN1_PERIOD=1e9/rtio_f, p_CLKIN2_PERIOD=0., i_CLKFBIN=pll_fb, o_CLKFBOUT=pll_fb, o_LOCKED=pll_locked, o_CLKOUT0=pll[0], p_CLKOUT0_DUTY_CYCLE=.5, o_CLKOUT1=pll[1], p_CLKOUT1_DUTY_CYCLE=.5, o_CLKOUT2=pll[2], p_CLKOUT2_DUTY_CYCLE=.5, p_CLKOUT0_PHASE=0., p_CLKOUT0_DIVIDE=1, p_CLKOUT1_PHASE=0., p_CLKOUT1_DIVIDE=2, p_CLKOUT2_PHASE=0., p_CLKOUT2_DIVIDE=8), Instance("BUFPLL", p_DIVIDE=8, i_PLLIN=pll[0], i_GCLK=self.cd_rtio.clk, i_LOCKED=pll_locked, o_IOCLK=self.cd_rtiox8.clk, o_SERDESSTROBE=self.rtiox8_stb), Instance("BUFPLL", p_DIVIDE=4, i_PLLIN=pll[1], i_GCLK=self.cd_rtio.clk, i_LOCKED=pll_locked, o_IOCLK=self.cd_rtiox4.clk, o_SERDESSTROBE=self.rtiox4_stb), Instance("BUFG", i_I=pll[2], o_O=self.cd_rtio.clk), AsyncResetSynchronizer(self.cd_rtio, ~pll_locked), MultiReg(pll_locked, self._pll_locked.status), ] # ISE infers correct period constraints for cd_rtio.clk from # the internal clock. The first two TIGs target just the BUFGMUX. platform.add_platform_command(""" NET "sys_clk" TNM_NET = "GRPsys_clk"; NET "{ext_clk}" TNM_NET = "GRPext_clk"; TIMESPEC "TSfix_ise1" = FROM "GRPsys_clk" TO "GRPext_clk" TIG; NET "{int_clk}" TNM_NET = "GRPint_clk"; TIMESPEC "TSfix_ise2" = FROM "GRPsys_clk" TO "GRPint_clk" TIG; NET "{rtio_clk}" TNM_NET = "GRPrtio_clk"; TIMESPEC "TSfix_ise3" = FROM "GRPrtio_clk" TO "GRPsys_clk" TIG; TIMESPEC "TSfix_ise4" = FROM "GRPsys_clk" TO "GRPrtio_clk" TIG; """, ext_clk=rtio_external_clk, int_clk=rtio_internal_clk, rtio_clk=self.cd_rtio.clk) class NIST_QC1(BaseSoC, AMPSoC): csr_map = { "rtio": None, # mapped on Wishbone instead "rtio_crg": 13, "kernel_cpu": 14, "rtio_moninj": 15 } csr_map.update(BaseSoC.csr_map) mem_map = { "rtio": 0x20000000, # (shadow @0xa0000000) "mailbox": 0x70000000 # (shadow @0xf0000000) } mem_map.update(BaseSoC.mem_map) def __init__(self, platform, cpu_type="or1k", **kwargs): BaseSoC.__init__(self, platform, cpu_type=cpu_type, sdram_controller_settings=MiniconSettings(l2_size=64*1024), with_timer=False, **kwargs) AMPSoC.__init__(self) platform.toolchain.ise_commands += """ trce -v 12 -fastpaths -tsi {build_name}.tsi -o {build_name}.twr {build_name}.ncd {build_name}.pcf """ platform.add_extension(nist_qc1.papilio_adapter_io) self.submodules.leds = gpio.GPIOOut(Cat( platform.request("user_led", 0), platform.request("user_led", 1), platform.request("user_led", 2), platform.request("user_led", 3), )) self.comb += [ platform.request("ttl_l_tx_en").eq(1), platform.request("ttl_h_tx_en").eq(1) ] self.submodules.rtio_crg = _RTIOCRG(platform, self.clk_freq) # RTIO channels rtio_channels = [] # pmt1 can run on a 8x serdes if pmt0 is not used for i in range(2): phy = ttl_serdes_spartan6.Inout_4X(platform.request("pmt", i), self.rtio_crg.rtiox4_stb) self.submodules += phy rtio_channels.append(rtio.Channel.from_phy(phy, ififo_depth=512, ofifo_depth=4)) # ttl2 can run on a 8x serdes if xtrig is not used for i in range(15): phy = ttl_serdes_spartan6.Output_4X(platform.request("ttl", i), self.rtio_crg.rtiox4_stb) self.submodules += phy rtio_channels.append(rtio.Channel.from_phy(phy, ofifo_depth=256)) phy = ttl_simple.Output(platform.request("ext_led", 0)) self.submodules += phy rtio_channels.append(rtio.Channel.from_phy(phy, ofifo_depth=4)) phy = ttl_simple.Output(platform.request("user_led", 4)) self.submodules += phy rtio_channels.append(rtio.Channel.from_phy(phy, ofifo_depth=4)) self.add_constant("RTIO_REGULAR_TTL_COUNT", len(rtio_channels)) phy = ttl_simple.ClockGen(platform.request("ttl", 15)) self.submodules += phy rtio_channels.append(rtio.Channel.from_phy(phy)) self.add_constant("RTIO_DDS_CHANNEL", len(rtio_channels)) self.add_constant("DDS_CHANNEL_COUNT", 8) self.add_constant("DDS_AD9858") dds_pins = platform.request("dds") self.comb += dds_pins.p.eq(0) phy = dds.AD9858(dds_pins, 8) self.submodules += phy rtio_channels.append(rtio.Channel.from_phy(phy, ofifo_depth=512, ififo_depth=4)) # RTIO core self.submodules.rtio = rtio.RTIO(rtio_channels) self.add_constant("RTIO_FINE_TS_WIDTH", self.rtio.fine_ts_width) self.add_constant("DDS_RTIO_CLK_RATIO", 8 >> self.rtio.fine_ts_width) self.submodules.rtio_moninj = rtio.MonInj(rtio_channels) # CPU connections rtio_csrs = self.rtio.get_csrs() 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) default_subtarget = NIST_QC1