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artiq/soc/targets/artiq_pipistrello.py

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from migen.fhdl.std import *
from migen.bank.description import *
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 targets.pipistrello import BaseSoC
from artiq.gateware import amp, rtio, ad9858, nist_qc1
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class _RTIOCRG(Module, AutoCSR):
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def __init__(self, platform):
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self._clock_sel = CSRStorage()
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self.clock_domains.cd_rtio = ClockDomain()
# 75MHz -> 125MHz
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rtio_internal_clk = Signal()
self.specials += Instance("DCM_CLKGEN",
p_CLKFXDV_DIVIDE=2,
p_CLKFX_DIVIDE=3,
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p_CLKFX_MD_MAX=1.6,
p_CLKFX_MULTIPLY=5,
p_CLKIN_PERIOD=1e3/75,
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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,
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i_S=self._clock_sel.storage,
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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 _Peripherals(BaseSoC):
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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(nist_qc1.papilio_adapter_io)
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self.submodules.leds = gpio.GPIOOut(Cat(
platform.request("user_led", 0),
platform.request("user_led", 1),
))
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 += [platform.request("ext_led", 0)]
rtio_outs += [platform.request("user_led", i) for i in range(2, 5)]
self.add_constant("RTIO_FUD_CHANNEL", len(rtio_ins) + len(rtio_outs))
rtio_outs.append(fud)
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self.submodules.rtiocrg = _RTIOCRG(platform)
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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)
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dds_pads = platform.request("dds")
self.submodules.dds = ad9858.AD9858(dds_pads)
self.comb += dds_pads.fud_n.eq(~fud)
class UP(_Peripherals):
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def __init__(self, platform, **kwargs):
_Peripherals.__init__(self, platform, **kwargs)
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rtio_csrs = self.rtio.get_csrs()
self.submodules.rtiowb = wbgen.Bank(rtio_csrs)
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self.add_wb_slave(mem_decoder(0xa0000000), self.rtiowb.bus)
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self.add_csr_region("rtio", 0xa0000000, 32, rtio_csrs)
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self.add_wb_slave(mem_decoder(0xb0000000), self.dds.bus)
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class AMP(_Peripherals):
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csr_map = {
"kernel_cpu": 14
}
csr_map.update(_Peripherals.csr_map)
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def __init__(self, platform, *args, **kwargs):
_Peripherals.__init__(self, platform, **kwargs)
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self.submodules.kernel_cpu = amp.KernelCPU(
platform, self.sdram.crossbar.get_master())
self.submodules.mailbox = amp.Mailbox()
self.add_wb_slave(mem_decoder(0xd0000000), self.mailbox.i1)
self.kernel_cpu.add_wb_slave(mem_decoder(0xd0000000), self.mailbox.i2)
rtio_csrs = self.rtio.get_csrs()
self.submodules.rtiowb = wbgen.Bank(rtio_csrs)
self.kernel_cpu.add_wb_slave(mem_decoder(0xa0000000), self.rtiowb.bus)
self.add_csr_region("rtio", 0xa0000000, 32, rtio_csrs)
self.kernel_cpu.add_wb_slave(mem_decoder(0xb0000000), self.dds.bus)
default_subtarget = UP