149 lines
6.6 KiB
Python
Executable File
149 lines
6.6 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2015-2019 Florent Kermarrec <florent@enjoy-digital.fr>
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# Copyright (c) 2020 Antmicro <www.antmicro.com>
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# SPDX-License-Identifier: BSD-2-Clause
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import os
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import argparse
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from migen import *
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from litex_boards.platforms import arty
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from litex.build.xilinx.vivado import vivado_build_args, vivado_build_argdict
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from litex.soc.cores.clock import *
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from litex.soc.integration.soc_core import *
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from litex.soc.integration.soc_sdram import *
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from litex.soc.integration.builder import *
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from litex.soc.cores.led import LedChaser
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from litedram.modules import MT41K128M16
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from litedram.phy import s7ddrphy
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from liteeth.phy.mii import LiteEthPHYMII
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# CRG ----------------------------------------------------------------------------------------------
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class _CRG(Module):
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def __init__(self, platform, sys_clk_freq):
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self.rst = Signal()
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self.clock_domains.cd_sys = ClockDomain()
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self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
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self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True)
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self.clock_domains.cd_idelay = ClockDomain()
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self.clock_domains.cd_eth = ClockDomain()
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# # #
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self.submodules.pll = pll = S7PLL(speedgrade=-1)
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self.comb += pll.reset.eq(~platform.request("cpu_reset") | self.rst)
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pll.register_clkin(platform.request("clk100"), 100e6)
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pll.create_clkout(self.cd_sys, sys_clk_freq)
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pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq)
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pll.create_clkout(self.cd_sys4x_dqs, 4*sys_clk_freq, phase=90)
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pll.create_clkout(self.cd_idelay, 200e6)
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pll.create_clkout(self.cd_eth, 25e6)
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self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay)
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self.comb += platform.request("eth_ref_clk").eq(self.cd_eth.clk)
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# BaseSoC ------------------------------------------------------------------------------------------
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class BaseSoC(SoCCore):
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def __init__(self, variant="a7-35", toolchain="vivado", sys_clk_freq=int(100e6), with_ethernet=False, with_etherbone=False, ident_version=True, **kwargs):
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platform = arty.Platform(variant=variant, toolchain=toolchain)
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, sys_clk_freq,
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ident = "LiteX SoC on Arty A7",
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ident_version = ident_version,
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**kwargs)
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# CRG --------------------------------------------------------------------------------------
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self.submodules.crg = _CRG(platform, sys_clk_freq)
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# DDR3 SDRAM -------------------------------------------------------------------------------
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if not self.integrated_main_ram_size:
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self.submodules.ddrphy = s7ddrphy.A7DDRPHY(platform.request("ddram"),
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memtype = "DDR3",
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nphases = 4,
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sys_clk_freq = sys_clk_freq)
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self.add_csr("ddrphy")
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self.add_sdram("sdram",
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phy = self.ddrphy,
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module = MT41K128M16(sys_clk_freq, "1:4"),
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origin = self.mem_map["main_ram"],
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size = kwargs.get("max_sdram_size", 0x40000000),
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l2_cache_size = kwargs.get("l2_size", 8192),
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l2_cache_min_data_width = kwargs.get("min_l2_data_width", 128),
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l2_cache_reverse = True
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)
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# Ethernet / Etherbone ---------------------------------------------------------------------
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if with_ethernet or with_etherbone:
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self.submodules.ethphy = LiteEthPHYMII(
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clock_pads = self.platform.request("eth_clocks"),
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pads = self.platform.request("eth"))
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self.add_csr("ethphy")
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if with_ethernet:
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self.add_ethernet(phy=self.ethphy)
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if with_etherbone:
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self.add_etherbone(phy=self.ethphy)
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# Leds -------------------------------------------------------------------------------------
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self.submodules.leds = LedChaser(
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pads = platform.request_all("user_led"),
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sys_clk_freq = sys_clk_freq)
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self.add_csr("leds")
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# Build --------------------------------------------------------------------------------------------
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def main():
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parser = argparse.ArgumentParser(description="LiteX SoC on Arty A7")
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parser.add_argument("--toolchain", default="vivado", help="Toolchain use to build (default: vivado)")
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parser.add_argument("--build", action="store_true", help="Build bitstream")
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parser.add_argument("--load", action="store_true", help="Load bitstream")
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parser.add_argument("--variant", default="a7-35", help="Board variant: a7-35 (default) or a7-100")
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parser.add_argument("--sys-clk-freq", default=100e6, help="System clock frequency (default: 100MHz)")
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parser.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support")
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parser.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support")
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parser.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support")
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parser.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support")
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parser.add_argument("--no-ident-version", action="store_false", help="Disable build time output")
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builder_args(parser)
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soc_sdram_args(parser)
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vivado_build_args(parser)
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args = parser.parse_args()
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assert not (args.with_ethernet and args.with_etherbone)
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soc = BaseSoC(
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variant = args.variant,
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toolchain = args.toolchain,
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sys_clk_freq = int(float(args.sys_clk_freq)),
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with_ethernet = args.with_ethernet,
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with_etherbone = args.with_etherbone,
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ident_version = args.no_ident_version,
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**soc_sdram_argdict(args)
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)
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assert not (args.with_spi_sdcard and args.with_sdcard)
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soc.platform.add_extension(arty._sdcard_pmod_io)
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if args.with_spi_sdcard:
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soc.add_spi_sdcard()
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if args.with_sdcard:
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soc.add_sdcard()
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builder = Builder(soc, **builder_argdict(args))
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builder_kwargs = vivado_build_argdict(args) if args.toolchain == "vivado" else {}
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builder.build(**builder_kwargs, run=args.build)
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if args.load:
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prog = soc.platform.create_programmer()
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prog.load_bitstream(os.path.join(builder.gateware_dir, soc.build_name + ".bit"))
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if __name__ == "__main__":
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main()
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