from migen.fhdl.std import * from migen.bank.description import * from migen.bank import wbgen from mibuild.generic_platform import * from misoclib.com import gpio from misoclib.mem.sdram.core.minicon import MiniconSettings from targets.ppro import BaseSoC from artiq.gateware import rtio, ad9858, nist_qc1 class _TestGen(Module): def __init__(self, pad): divc = Signal(15) ce = Signal() self.sync += Cat(divc, ce).eq(divc + 1) sr = Signal(8, reset=0b10101000) self.sync += If(ce, sr.eq(Cat(sr[1:], sr[0]))) self.comb += pad.eq(sr[0]) class _RTIOMiniCRG(Module, AutoCSR): def __init__(self, platform): self._clock_sel = CSRStorage() self.clock_domains.cd_rtio = ClockDomain() # 80MHz -> 125MHz rtio_internal_clk = Signal() self.specials += Instance("DCM_CLKGEN", p_CLKFXDV_DIVIDE=2, p_CLKFX_DIVIDE=16, p_CLKFX_MD_MAX=1.6, p_CLKFX_MULTIPLY=25, p_CLKIN_PERIOD=12.5, 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("xtrig") platform.add_period_constraint(rtio_external_clk, 8.0) 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 "{rtio_clk}" TNM_NET = "GRPrtio_clk"; NET "sys_clk" TNM_NET = "GRPsys_clk"; TIMESPEC "TSfix_ise1" = FROM "GRPrtio_clk" TO "GRPsys_clk" TIG; TIMESPEC "TSfix_ise2" = FROM "GRPsys_clk" TO "GRPrtio_clk" TIG; """, rtio_clk=rtio_internal_clk) class UP(BaseSoC): csr_map = { "rtio": None, # mapped on Wishbone instead "rtiocrg": 13 } csr_map.update(BaseSoC.csr_map) def __init__(self, platform, cpu_type="or1k", with_test_gen=False, **kwargs): BaseSoC.__init__(self, platform, cpu_type=cpu_type, sdram_controller_settings=MiniconSettings(), **kwargs) platform.add_extension(nist_qc1.papilio_adapter_io) self.submodules.leds = gpio.GPIOOut(Cat( platform.request("user_led", 0), platform.request("ext_led", 0))) fud = Signal() self.comb += [ platform.request("ttl_l_tx_en").eq(1), platform.request("ttl_h_tx_en").eq(1) ] rtio_ins = [platform.request("pmt") for i in range(2)] rtio_outs = [platform.request("ttl", i) for i in range(5)] self.add_constant("RTIO_FUD_CHANNEL", len(rtio_ins) + len(rtio_outs)) rtio_outs.append(fud) self.submodules.rtiocrg = _RTIOMiniCRG(platform) self.submodules.rtiophy = rtio.phy.SimplePHY( rtio_ins + rtio_outs, output_only_pads=set(rtio_outs)) self.submodules.rtio = rtio.RTIO(self.rtiophy, clk_freq=125000000, counter_width=32, ififo_depth=512) rtio_csrs = self.rtio.get_csrs() self.submodules.rtiowb = wbgen.Bank(rtio_csrs) self.add_wb_slave(lambda a: a[26:29] == 2, self.rtiowb.bus) self.add_csr_region("rtio", 0xa0000000, 32, rtio_csrs) if with_test_gen: self.submodules.test_gen = _TestGen(platform.request("ttl", 8)) dds_pads = platform.request("dds") self.submodules.dds = ad9858.AD9858(dds_pads) self.add_wb_slave(lambda a: a[26:29] == 3, self.dds.bus) self.comb += dds_pads.fud_n.eq(~fud) default_subtarget = UP