172 lines
7.5 KiB
Python
Executable File
172 lines
7.5 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) 2020 Florent Kermarrec <florent@enjoy-digital.fr>
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# SPDX-License-Identifier: BSD-2-Clause
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# Build/Use ----------------------------------------------------------------------------------------
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# Build/Load bitstream:
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# ./sds1104xe.py --with-etherbone --uart-name=crossover --csr-csv=csr.csv --build --load
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#
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# Test Ethernet:
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# ping 192.168.1.50
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#
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# Test Console:
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# litex_server --udp
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# litex_term crossover
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# --------------------------------------------------------------------------------------------------
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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 sds1104xe
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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.builder import *
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from litedram.modules import MT41K64M16
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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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# # #
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self.submodules.pll = pll = S7PLL(speedgrade=-1)
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pll.register_clkin(ClockSignal("eth_tx"), 25e6)
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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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platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst.
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self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay)
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# BaseSoC ------------------------------------------------------------------------------------------
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class BaseSoC(SoCCore):
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def __init__(self, sys_clk_freq=int(100e6), with_etherbone=True, eth_ip="192.168.1.50", **kwargs):
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platform = sds1104xe.Platform()
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# SoCCore ----------------------------------------------------------------------------------
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if kwargs.get("uart_name", "serial") == "serial":
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kwargs["uart_name"] = "crossover" # Defaults to Crossover UART.
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SoCCore.__init__(self, platform, sys_clk_freq,
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ident = "LiteX SoC on Siglent SDS1104X-E",
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ident_version = True,
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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_sdram("sdram",
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phy = self.ddrphy,
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module = MT41K64M16(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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# Etherbone --------------------------------------------------------------------------------
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if with_etherbone:
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# FIXME: Simplify LiteEth Hybrid MAC integration.
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from liteeth.common import convert_ip
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from liteeth.mac import LiteEthMAC
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from liteeth.core.arp import LiteEthARP
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from liteeth.core.ip import LiteEthIP
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from liteeth.core.udp import LiteEthUDP
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from liteeth.core.icmp import LiteEthICMP
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from liteeth.core import LiteEthUDPIPCore
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from liteeth.frontend.etherbone import LiteEthEtherbone
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# Ethernet PHY
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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.submodules += ethphy
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etherbone_ip_address = convert_ip("192.168.1.51")
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etherbone_mac_address = 0x10e2d5000001
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# Ethernet MAC
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self.submodules.ethmac = LiteEthMAC(phy=ethphy, dw=8,
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interface = "hybrid",
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endianness = self.cpu.endianness,
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hw_mac = etherbone_mac_address)
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# Software Interface.
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self.add_memory_region("ethmac", self.mem_map["ethmac"], 0x2000, type="io")
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self.add_wb_slave(self.mem_regions["ethmac"].origin, self.ethmac.bus, 0x2000)
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if self.irq.enabled:
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self.irq.add("ethmac", use_loc_if_exists=True)
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# Hardware Interface.
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self.submodules.arp = LiteEthARP(self.ethmac, etherbone_mac_address, etherbone_ip_address, sys_clk_freq, dw=8)
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self.submodules.ip = LiteEthIP(self.ethmac, etherbone_mac_address, etherbone_ip_address, self.arp.table, dw=8)
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self.submodules.icmp = LiteEthICMP(self.ip, etherbone_ip_address, dw=8)
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self.submodules.udp = LiteEthUDP(self.ip, etherbone_ip_address, dw=8)
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# Etherbone
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self.submodules.etherbone = LiteEthEtherbone(self.udp, 1234, mode="master")
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self.add_wb_master(self.etherbone.wishbone.bus)
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# Timing constraints
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eth_rx_clk = ethphy.crg.cd_eth_rx.clk
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eth_tx_clk = ethphy.crg.cd_eth_tx.clk
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self.platform.add_period_constraint(eth_rx_clk, 1e9/ethphy.rx_clk_freq)
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self.platform.add_period_constraint(eth_tx_clk, 1e9/ethphy.tx_clk_freq)
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self.platform.add_false_path_constraints(self.crg.cd_sys.clk, eth_rx_clk, eth_tx_clk)
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# Build --------------------------------------------------------------------------------------------
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def main():
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parser = argparse.ArgumentParser(description="LiteX SoC on SDS1104X-E")
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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("--sys-clk-freq", default=100e6, help="System clock frequency (default: 100MHz)")
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parser.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support")
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parser.add_argument("--eth-ip", default="192.168.1.50", type=str, help="Ethernet/Etherbone IP address")
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builder_args(parser)
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soc_core_args(parser)
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vivado_build_args(parser)
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args = parser.parse_args()
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soc = BaseSoC(
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sys_clk_freq = int(float(args.sys_clk_freq)),
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with_etherbone = args.with_etherbone,
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eth_ip = args.eth_ip,
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**soc_core_argdict(args)
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)
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builder = Builder(soc, **builder_argdict(args))
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builder.build(**vivado_build_argdict(args), 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"), device=1)
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if __name__ == "__main__":
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main()
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