diff --git a/soc/targets/artiq_pipistrello.py b/soc/targets/artiq_pipistrello.py new file mode 100644 index 000000000..5333389d9 --- /dev/null +++ b/soc/targets/artiq_pipistrello.py @@ -0,0 +1,138 @@ +from migen.fhdl.std import * +from migen.bank.description import * +from migen.bank import wbgen +from mibuild.generic_platform import * + +from misoclib.cpu.peripherals import gpio +from targets.pipistrello import BaseSoC + +from artiq.gateware import rtio, ad9858 + + +_tester_io = [ + ("ext_led", 0, Pins("B:7"), IOStandard("LVTTL")), + + ("pmt", 0, Pins("C:13"), IOStandard("LVTTL")), + ("pmt", 1, Pins("C:14"), IOStandard("LVTTL")), + ("xtrig", 0, Pins("C:12"), IOStandard("LVTTL")), + ("dds_clock", 0, Pins("C:15"), IOStandard("LVTTL")), + + ("ttl", 0, Pins("C:11"), IOStandard("LVTTL")), + ("ttl", 1, Pins("C:10"), IOStandard("LVTTL")), + ("ttl", 2, Pins("C:9"), IOStandard("LVTTL")), + ("ttl", 3, Pins("C:8"), IOStandard("LVTTL")), + ("ttl", 4, Pins("C:7"), IOStandard("LVTTL")), + ("ttl", 5, Pins("C:6"), IOStandard("LVTTL")), + ("ttl", 6, Pins("C:5"), IOStandard("LVTTL")), + ("ttl", 7, Pins("C:4"), IOStandard("LVTTL")), + ("ttl_l_tx_en", 0, Pins("A:9"), IOStandard("LVTTL")), + + ("ttl", 8, Pins("C:3"), IOStandard("LVTTL")), + ("ttl", 9, Pins("C:2"), IOStandard("LVTTL")), + ("ttl", 10, Pins("C:1"), IOStandard("LVTTL")), + ("ttl", 11, Pins("C:0"), IOStandard("LVTTL")), + ("ttl", 12, Pins("B:4"), IOStandard("LVTTL")), + ("ttl", 13, Pins("A:11"), IOStandard("LVTTL")), + ("ttl", 14, Pins("B:5"), IOStandard("LVTTL")), + ("ttl", 15, Pins("A:10"), IOStandard("LVTTL")), + ("ttl_h_tx_en", 0, Pins("B:6"), IOStandard("LVTTL")), + + ("dds", 0, + Subsignal("a", Pins("A:5 B:10 A:6 B:9 A:7 B:8")), + Subsignal("d", Pins("A:12 B:3 A:13 B:2 A:14 B:1 A:15 B:0")), + Subsignal("sel", Pins("A:2 B:14 A:1 B:15 A:0")), + Subsignal("p", Pins("A:8 B:12")), + Subsignal("fud_n", Pins("B:11")), + Subsignal("wr_n", Pins("A:4")), + Subsignal("rd_n", Pins("B:13")), + Subsignal("rst_n", Pins("A:3")), + IOStandard("LVTTL")), +] + + +class _RTIOMiniCRG(Module, AutoCSR): + def __init__(self, platform): + self._r_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("dds_clock") + 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._r_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 ARTIQMidiSoC(BaseSoC): + csr_map = { + "rtio": None, # mapped on Wishbone instead + "rtiocrg": 13 + } + csr_map.update(BaseSoC.csr_map) + + def __init__(self, platform, cpu_type="or1k", **kwargs): + BaseSoC.__init__(self, platform, cpu_type=cpu_type, **kwargs) + platform.add_extension(_tester_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), + platform.request("user_led", 4), + 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", i) for i in range(2)] + rtio_ins += [platform.request("xtrig", 0)] + rtio_outs = [platform.request("ttl", i) for i in range(16)] + rtio_outs += [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, + 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) + + 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 = ARTIQMidiSoC