from fractions import Fraction from migen.fhdl.std import * from migen.bank.description import * from migen.bank import wbgen 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, dds class _RTIOCRG(Module, AutoCSR): def __init__(self, platform, clk_freq): self._clock_sel = CSRStorage() self.clock_domains.cd_rtio = ClockDomain(reset_less=True) f = Fraction(125*1000*1000, clk_freq) rtio_internal_clk = Signal() self.specials += 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()) rtio_external_clk = platform.request("pmt", 2) # ISE infers constraints for the internal clock # and propagates them through the BUFGMUX. Adding this: # platform.add_period_constraint(rtio_external_clk, 8.0) # seems to confuse it self.specials += Instance("BUFGMUX", i_I0=rtio_internal_clk, i_I1=rtio_external_clk, i_S=self._clock_sel.storage, o_O=self.cd_rtio.clk) platform.add_platform_command(""" NET "{int_clk}" TNM_NET = "GRPint_clk"; NET "sys_clk" TNM_NET = "GRPsys_clk"; TIMESPEC "TSfix_ise1" = FROM "GRPint_clk" TO "GRPsys_clk" TIG; TIMESPEC "TSfix_ise2" = FROM "GRPsys_clk" TO "GRPint_clk" TIG; """, int_clk=rtio_internal_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) ] # 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.from_phy(phy, ififo_depth=512, ofifo_depth=4)) for i in range(15): phy = ttl_simple.Output(platform.request("ttl", i)) 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_crg = _RTIOCRG(platform, self.clk_freq) 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