#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2020 Florent Kermarrec # Copyright (c) 2022 Sylvain Munaut # SPDX-License-Identifier: BSD-2-Clause import os from migen import * from litex_boards.platforms import adi_adrv2crr_fmc from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.cores.clock import * from litex.soc.cores.led import LedChaser from litex.soc.cores.pwm import PWM from litex.soc.cores.xadc import ZynqUSPSystemMonitor from litedram.modules import MT40A512M16 from litedram.phy import usddrphy from litepcie.phy.usppciephy import USPPCIEPHY from litepcie.software import generate_litepcie_software # CRG ---------------------------------------------------------------------------------------------- class CRG(Module): def __init__(self, platform, sys_clk_freq, ddram_channel): self.rst = Signal() self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_sys4x = ClockDomain(reset_less=True) self.clock_domains.cd_pll4x = ClockDomain(reset_less=True) self.clock_domains.cd_idelay = ClockDomain() # # # self.submodules.pll = pll = USPMMCM(speedgrade=-1) self.comb += pll.reset.eq(self.rst) pll.register_clkin(platform.request("ddram_refclk", ddram_channel), 300e6) pll.create_clkout(self.cd_pll4x, sys_clk_freq*4, buf=None, with_reset=False) pll.create_clkout(self.cd_idelay, 400e6) platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. self.specials += [ Instance("BUFGCE_DIV", name="main_bufgce_div", p_BUFGCE_DIVIDE=4, i_CE=1, i_I=self.cd_pll4x.clk, o_O=self.cd_sys.clk), Instance("BUFGCE", name="main_bufgce", i_CE=1, i_I=self.cd_pll4x.clk, o_O=self.cd_sys4x.clk), ] self.submodules.idelayctrl = USPIDELAYCTRL(cd_ref=self.cd_idelay, cd_sys=self.cd_sys) # BaseSoC ----------------------------------------------------------------------------------------- class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=int(150e6), ddram_channel=0, with_led_chaser=True, with_pcie=False, **kwargs): platform = adi_adrv2crr_fmc.Platform() # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident = "LiteX SoC on ADI ADRV2CRR-FMC", **kwargs) # CRG -------------------------------------------------------------------------------------- self.submodules.crg = CRG(platform, sys_clk_freq, ddram_channel) # DDR4 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.submodules.ddrphy = usddrphy.USPDDRPHY( pads = platform.request("ddram", ddram_channel), memtype = "DDR4", sys_clk_freq = sys_clk_freq, iodelay_clk_freq = 400e6) self.add_sdram("sdram", phy = self.ddrphy, module = MT40A512M16(sys_clk_freq, "1:4"), size = 0x40000000, l2_cache_size = kwargs.get("l2_size", 8192) ) # PCIe ------------------------------------------------------------------------------------- if with_pcie: assert self.csr_data_width == 32 self.submodules.pcie_phy = USPPCIEPHY(platform, platform.request("pcie_x4"), speed = "gen3", data_width = 128, bar0_size = 0x20000) self.add_pcie(phy=self.pcie_phy, ndmas=1) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.submodules.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # Fan -------------------------------------------------------------------------------------- # Full speed is _really_ loud and with this demo bitstream which is almost # empty, we can slow it way down and still keep the FPGA < 10C above ambient self.submodules.fan = PWM( default_enable = 1, default_period = 2500, default_width = 500 ) self.comb += platform.request("fan").pwm_n.eq(~self.fan.pwm) # SYSMON ----------------------------------------------------------------------------------- self.submodules.sysmon = ZynqUSPSystemMonitor() # JTAG ------------------------------------------------------------------------------------- self.add_jtagbone() # Build -------------------------------------------------------------------------------------------- def main(): from litex.soc.integration.soc import LiteXSoCArgumentParser parser = LiteXSoCArgumentParser(description="LiteX SoC on ADI ADRV2CRR-FMC") target_group = parser.add_argument_group(title="Target options") 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("--sys-clk-freq", default=150e6, help="System clock frequency (default: 150 MHz)") target_group.add_argument("--with-pcie", action="store_true", help="Enable PCIe support") target_group.add_argument("--driver", action="store_true", help="Generate PCIe driver") builder_args(parser) soc_core_args(parser) args = parser.parse_args() soc = BaseSoC( sys_clk_freq = int(float(args.sys_clk_freq)), with_pcie = args.with_pcie, **soc_core_argdict(args) ) builder = Builder(soc, **builder_argdict(args)) builder.build(run=args.build) if args.driver: generate_litepcie_software(soc, os.path.join(builder.output_dir, "driver")) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if __name__ == "__main__": main()