#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2021 Antmicro # SPDX-License-Identifier: BSD-2-Clause from migen import * from litex.gen import * from litex_boards.platforms import antmicro_lpddr4_test_board from litex.soc.cores.clock import * from litex.soc.integration.soc_core import * from litex.soc.integration.soc import SoCRegion from litex.soc.integration.builder import * from litex.soc.cores.led import LedChaser from litedram.modules import MT53E256M16D1 from litedram.phy import lpddr4 from liteeth.phy import LiteEthS7PHYRGMII from litex.soc.cores.hyperbus import HyperRAM # CRG ---------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq, iodelay_clk_freq): self.rst = Signal() self.cd_sys = ClockDomain() self.cd_sys2x = ClockDomain() self.cd_sys8x = ClockDomain() self.cd_idelay = ClockDomain() # # # self.pll = pll = S7PLL(speedgrade=-1) self.comb += pll.reset.eq(self.rst) pll.register_clkin(platform.request("clk100"), 100e6) pll.create_clkout(self.cd_sys, sys_clk_freq) pll.create_clkout(self.cd_sys2x, 2 * sys_clk_freq) pll.create_clkout(self.cd_sys8x, 8 * sys_clk_freq) pll.create_clkout(self.cd_idelay, iodelay_clk_freq) self.idelayctrl = S7IDELAYCTRL(self.cd_idelay) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, *, sys_clk_freq=50e6, iodelay_clk_freq=200e6, with_ethernet = False, with_etherbone = False, eth_ip = "192.168.1.50", eth_dynamic_ip = False, with_hyperram = False, with_sdcard = False, with_led_chaser = True, **kwargs): platform = antmicro_lpddr4_test_board.Platform() # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq, iodelay_clk_freq=iodelay_clk_freq) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on LPDDR4 Test Board", **kwargs) # LDDR4 SDRAM ------------------------------------------------------------------------------ if not self.integrated_main_ram_size: self.ddrphy = lpddr4.K7LPDDR4PHY(platform.request("lpddr4"), iodelay_clk_freq = iodelay_clk_freq, sys_clk_freq = sys_clk_freq, ) self.add_sdram("sdram", phy = self.ddrphy, module = MT53E256M16D1(sys_clk_freq, "1:8"), l2_cache_size = kwargs.get("l2_size", 8192), l2_cache_min_data_width = 256, ) # HyperRAM --------------------------------------------------------------------------------- if with_hyperram: self.hyperram = HyperRAM(platform.request("hyperram"), sys_clk_freq=sys_clk_freq) self.bus.add_slave("hyperram", slave=self.hyperram.bus, region=SoCRegion(origin=0x20000000, size=8*1024*1024)) # SD Card ---------------------------------------------------------------------------------- if with_sdcard: self.add_sdcard() # Ethernet / Etherbone --------------------------------------------------------------------- if with_ethernet or with_etherbone: # Traces between PHY and FPGA introduce ignorable delays of ~0.165ns +/- 0.015ns. # PHY chip does not introduce delays on TX (FPGA->PHY), however it includes 1.2ns # delay for RX CLK so we only need 0.8ns to match the desired 2ns. self.ethphy = LiteEthS7PHYRGMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth"), rx_delay = 0.8e-9, ) 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) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=antmicro_lpddr4_test_board.Platform, description="LiteX SoC on LPDDR4 Test Board.") parser.add_target_argument("--flash", action="store_true", help="Flash bitstream.") parser.add_target_argument("--sys-clk-freq", default=50e6, type=float, help="System clock frequency.") parser.add_target_argument("--iodelay-clk-freq", default=200e6, type=float, help="IODELAYCTRL frequency.") ethopts = parser.target_group.add_mutually_exclusive_group() ethopts.add_argument("--with-ethernet", action="store_true", help="Add Ethernet.") ethopts.add_argument("--with-etherbone", action="store_true", help="Add EtherBone.") parser.add_target_argument("--eth-ip", default="192.168.1.50", help="Ethernet/Etherbone IP address.") parser.add_target_argument("--eth-dynamic-ip", action="store_true", help="Enable dynamic Ethernet IP addresses setting.") parser.add_target_argument("--with-hyperram", action="store_true", help="Add HyperRAM.") parser.add_target_argument("--with-sdcard", action="store_true", help="Add SDCard.") args = parser.parse_args() assert not (args.with_etherbone and args.eth_dynamic_ip) soc = BaseSoC( sys_clk_freq = args.sys_clk_freq, iodelay_clk_freq = args.iodelay_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_hyperram = args.with_hyperram, with_sdcard = args.with_sdcard, **parser.soc_argdict) builder = Builder(soc, **parser.builder_argdict) if args.build: builder.build(**parser.toolchain_argdict) 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()