#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2020 Florent Kermarrec # SPDX-License-Identifier: BSD-2-Clause # Build/Use ---------------------------------------------------------------------------------------- # Build/Load bitstream: # ./siglent_ds1104xe.py --with-etherbone --uart-name=crossover --csr-csv=csr.csv --build --load # # Test Ethernet: # ping 192.168.1.50 # # Test Console: # litex_server --udp # litex_term crossover # -------------------------------------------------------------------------------------------------- from migen import * from litex.gen import LiteXModule from litex_boards.platforms import siglent_sds1104xe from litex.soc.cores.clock import * from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.cores.video import VideoVGAPHY from litedram.common import PHYPadsReducer from litedram.modules import MT41K64M16 from litedram.phy import s7ddrphy from liteeth.phy.mii import LiteEthPHYMII # CRG ---------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq, with_ethernet=False): self.rst = Signal() self.cd_sys = ClockDomain() self.cd_sys4x = ClockDomain() self.cd_sys4x_dqs = ClockDomain() self.cd_idelay = ClockDomain() self.cd_dvi = ClockDomain() # # # # Clk / Rst clk25 = ClockSignal("eth_tx") if with_ethernet else platform.request("eth_clocks").rx # PLL self.pll = pll = S7PLL(speedgrade=-1) pll.register_clkin(clk25, 25e6) pll.create_clkout(self.cd_sys, sys_clk_freq) 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) pll.create_clkout(self.cd_dvi, 33.3e6) platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. self.idelayctrl = S7IDELAYCTRL(self.cd_idelay) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=100e6, with_etherbone=True, eth_ip="192.168.1.50", with_video_terminal=False, with_video_framebuffer=False, **kwargs): platform = siglent_sds1104xe.Platform() # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq, with_ethernet=with_etherbone) # SoCCore ---------------------------------------------------------------------------------- if kwargs.get("uart_name", "serial") == "serial": kwargs["uart_name"] = "crossover" # Defaults to Crossover UART. SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Siglent SDS1104X-E", **kwargs) # DDR3 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.ddrphy = s7ddrphy.A7DDRPHY( pads = PHYPadsReducer(platform.request("ddram"), [0, 1, 2, 3]), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq) self.add_sdram("sdram", phy = self.ddrphy, module = MT41K64M16(sys_clk_freq, "1:4"), l2_cache_size = kwargs.get("l2_size", 8192) ) # Etherbone -------------------------------------------------------------------------------- if with_etherbone: # FIXME: Simplify LiteEth Hybrid MAC integration. from liteeth.common import convert_ip from liteeth.mac import LiteEthMAC from liteeth.core.arp import LiteEthARP from liteeth.core.ip import LiteEthIP from liteeth.core.udp import LiteEthUDP from liteeth.core.icmp import LiteEthICMP from liteeth.core import LiteEthUDPIPCore from liteeth.frontend.etherbone import LiteEthEtherbone # Ethernet PHY self.ethphy = LiteEthPHYMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth")) etherbone_ip_address = convert_ip("192.168.1.51") etherbone_mac_address = 0x10e2d5000001 # Ethernet MAC self.ethmac = LiteEthMAC(phy=self.ethphy, dw=8, interface = "hybrid", endianness = self.cpu.endianness, hw_mac = etherbone_mac_address) # Software Interface. self.add_memory_region("ethmac", getattr(self.mem_map, "ethmac", None), 0x2000, type="io") self.add_wb_slave(self.mem_regions["ethmac"].origin, self.ethmac.bus, 0x2000) if self.irq.enabled: self.irq.add("ethmac", use_loc_if_exists=True) # Hardware Interface. self.arp = LiteEthARP(self.ethmac, etherbone_mac_address, etherbone_ip_address, sys_clk_freq, dw=8) self.ip = LiteEthIP(self.ethmac, etherbone_mac_address, etherbone_ip_address, self.arp.table, dw=8) self.icmp = LiteEthICMP(self.ip, etherbone_ip_address, dw=8) self.udp = LiteEthUDP(self.ip, etherbone_ip_address, dw=8) self.add_constant("ETH_PHY_NO_RESET") # Disable reset from BIOS to avoid disabling Hardware Interface. # Etherbone self.etherbone = LiteEthEtherbone(self.udp, 1234, mode="master") self.bus.add_master(master=self.etherbone.wishbone.bus) # Timing constraints eth_rx_clk = self.ethphy.crg.cd_eth_rx.clk eth_tx_clk = self.ethphy.crg.cd_eth_tx.clk self.platform.add_period_constraint(eth_rx_clk, 1e9/self.ethphy.rx_clk_freq) self.platform.add_period_constraint(eth_tx_clk, 1e9/self.ethphy.tx_clk_freq) self.platform.add_false_path_constraints(self.crg.cd_sys.clk, eth_rx_clk, eth_tx_clk) # Video ------------------------------------------------------------------------------------ video_timings = ("800x480@60Hz", { "pix_clk" : 33.3e6, "h_active" : 800, "h_blanking" : 256, "h_sync_offset" : 210, "h_sync_width" : 1, "v_active" : 480, "v_blanking" : 45, "v_sync_offset" : 22, "v_sync_width" : 1, }) if with_video_terminal or with_video_framebuffer: self.videophy = VideoVGAPHY(platform.request("lcd"), clock_domain="dvi") if with_video_terminal: self.add_video_terminal(phy=self.videophy, timings=video_timings, clock_domain="dvi") if with_video_framebuffer: self.add_video_framebuffer(phy=self.videophy, timings=video_timings, clock_domain="dvi") # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=siglent_sds1104xe.Platform, description="LiteX SoC on SDS1104X-E.") parser.add_target_argument("--sys-clk-freq", default=100e6, type=float, help="System clock frequency.") parser.add_target_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.") parser.add_target_argument("--eth-ip", default="192.168.1.50", help="Ethernet/Etherbone IP address.") viopts = parser.target_group.add_mutually_exclusive_group() viopts.add_argument("--with-video-terminal", action="store_true", help="Enable Video Terminal (HDMI).") viopts.add_argument("--with-video-framebuffer", action="store_true", help="Enable Video Framebuffer (HDMI).") args = parser.parse_args() soc = BaseSoC( sys_clk_freq = args.sys_clk_freq, with_etherbone = args.with_etherbone, eth_ip = args.eth_ip, with_video_terminal = args.with_video_terminal, with_video_framebuffer = args.with_video_framebuffer, **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"), device=1) if __name__ == "__main__": main()