#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2015-2019 Florent Kermarrec # Copyright (c) 2020 Antmicro # Copyright (c) 2022 Victor Suarez Rovere # SPDX-License-Identifier: BSD-2-Clause # Note: For now, with --toolchain=yosys+nextpnr, DDR3 should be disabled and sys_clk_freq lowered, ex: # python3 -m litex_boards.targets.digilent_arty.py --sys-clk-freq=50e6 --integrated-main-ram-size=8192 --toolchain=yosys+nextpnr --build from migen import * from litex_boards.platforms import arty from litex.build.xilinx.vivado import vivado_build_args, vivado_build_argdict from litex.soc.cores.clock import * from litex.soc.integration.soc import SoCRegion from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.cores.led import LedChaser from litex.soc.cores.gpio import GPIOTristate from litedram.modules import MT41K128M16 from litedram.phy import s7ddrphy from liteeth.phy.mii import LiteEthPHYMII # CRG ---------------------------------------------------------------------------------------------- class _CRG(Module): def __init__(self, platform, sys_clk_freq, with_dram=True, with_rst=True): self.rst = Signal() self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_eth = ClockDomain() if with_dram: self.clock_domains.cd_sys4x = ClockDomain(reset_less=True) self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True) self.clock_domains.cd_idelay = ClockDomain() # # # # Clk/Rst. clk100 = platform.request("clk100") rst = ~platform.request("cpu_reset") if with_rst else 0 # PLL. self.submodules.pll = pll = S7PLL(speedgrade=-1) self.comb += pll.reset.eq(rst | self.rst) pll.register_clkin(clk100, 100e6) pll.create_clkout(self.cd_sys, sys_clk_freq) pll.create_clkout(self.cd_eth, 25e6) self.comb += platform.request("eth_ref_clk").eq(self.cd_eth.clk) platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. if with_dram: pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq) pll.create_clkout(self.cd_sys4x_dqs, 4*sys_clk_freq, phase=90) pll.create_clkout(self.cd_idelay, 200e6) # IdelayCtrl. if with_dram: self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, variant="a7-35", toolchain="vivado", sys_clk_freq=int(100e6), with_ethernet=False, with_etherbone=False, eth_ip="192.168.1.50", eth_dynamic_ip=False, with_led_chaser=True, with_jtagbone=True, with_spi_flash=False, with_pmod_gpio=False, **kwargs): platform = arty.Platform(variant=variant, toolchain=toolchain) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident = "LiteX SoC on Arty A7", **kwargs) # CRG -------------------------------------------------------------------------------------- self.submodules.crg = _CRG(platform, sys_clk_freq, with_dram=not self.integrated_main_ram_size) # DDR3 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.submodules.ddrphy = s7ddrphy.A7DDRPHY(platform.request("ddram"), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq) self.add_sdram("sdram", phy = self.ddrphy, module = MT41K128M16(sys_clk_freq, "1:4"), l2_cache_size = kwargs.get("l2_size", 8192) ) # Ethernet / Etherbone --------------------------------------------------------------------- if with_ethernet or with_etherbone: self.submodules.ethphy = LiteEthPHYMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth")) if with_ethernet: self.add_ethernet(phy=self.ethphy, dynamic_ip=eth_dynamic_ip) if with_etherbone: self.add_etherbone(phy=self.ethphy, ip_address=eth_ip) # Jtagbone --------------------------------------------------------------------------------- if with_jtagbone: self.add_jtagbone() # SPI Flash -------------------------------------------------------------------------------- if with_spi_flash: from litespi.modules import S25FL128L from litespi.opcodes import SpiNorFlashOpCodes as Codes self.add_spi_flash(mode="4x", module=S25FL128L(Codes.READ_1_1_4), rate="1:2", with_master=True) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.submodules.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # GPIOs ------------------------------------------------------------------------------------ if with_pmod_gpio: platform.add_extension(arty.raw_pmod_io("pmoda")) self.submodules.gpio = GPIOTristate(platform.request("pmoda")) # Build -------------------------------------------------------------------------------------------- def main(): from litex.soc.integration.soc import LiteXSoCArgumentParser parser = LiteXSoCArgumentParser(description="LiteX SoC on Arty A7") target_group = parser.add_argument_group(title="Target options") target_group.add_argument("--toolchain", default="vivado", help="FPGA toolchain (vivado, symbiflow or yosys+nextpnr).") target_group.add_argument("--build", action="store_true", help="Build bitstream.") target_group.add_argument("--load", action="store_true", help="Load bitstream.") target_group.add_argument("--flash", action="store_true", help="Flash bitstream.") target_group.add_argument("--variant", default="a7-35", help="Board variant (a7-35 or a7-100).") target_group.add_argument("--sys-clk-freq", default=100e6, help="System clock frequency.") ethopts = target_group.add_mutually_exclusive_group() ethopts.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support.") ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.") target_group.add_argument("--eth-ip", default="192.168.1.50", type=str, help="Ethernet/Etherbone IP address.") target_group.add_argument("--eth-dynamic-ip", action="store_true", help="Enable dynamic Ethernet IP addresses setting.") sdopts = target_group.add_mutually_exclusive_group() sdopts.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.") sdopts.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support.") target_group.add_argument("--sdcard-adapter", type=str, help="SDCard PMOD adapter (digilent or numato).") target_group.add_argument("--with-jtagbone", action="store_true", help="Enable JTAGbone support.") target_group.add_argument("--with-spi-flash", action="store_true", help="Enable SPI Flash (MMAPed).") target_group.add_argument("--with-pmod-gpio", action="store_true", help="Enable GPIOs through PMOD.") # FIXME: Temporary test. builder_args(parser) soc_core_args(parser) vivado_build_args(parser) args = parser.parse_args() assert not (args.with_etherbone and args.eth_dynamic_ip) soc = BaseSoC( variant = args.variant, toolchain = args.toolchain, sys_clk_freq = int(float(args.sys_clk_freq)), with_ethernet = args.with_ethernet, with_etherbone = args.with_etherbone, eth_ip = args.eth_ip, eth_dynamic_ip = args.eth_dynamic_ip, with_jtagbone = args.with_jtagbone, with_spi_flash = args.with_spi_flash, with_pmod_gpio = args.with_pmod_gpio, **soc_core_argdict(args) ) if args.sdcard_adapter == "numato": soc.platform.add_extension(arty._numato_sdcard_pmod_io) else: soc.platform.add_extension(arty._sdcard_pmod_io) if args.with_spi_sdcard: soc.add_spi_sdcard() if args.with_sdcard: soc.add_sdcard() builder = Builder(soc, **builder_argdict(args)) builder_kwargs = vivado_build_argdict(args) if args.toolchain == "vivado" else {} builder.build(**builder_kwargs, run=args.build) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if args.flash: prog = soc.platform.create_programmer() prog.flash(0, builder.get_bitstream_filename(mode="flash")) if __name__ == "__main__": main()