#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2022-2023 Icenowy Zheng # Copyright (c) 2022 Florent Kermarrec # SPDX-License-Identifier: BSD-2-Clause from migen import * from migen.genlib.resetsync import AsyncResetSynchronizer from litex.gen import * from litex.soc.cores.clock.gowin_gw5a import GW5APLL 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, WS2812 from litex.soc.cores.video import * from liteeth.phy.gw5rgmii import LiteEthPHYRGMII from litedram.modules import AS4C32M16, MT41K64M16 from litedram.phy import GENSDRPHY, HalfRateGENSDRPHY from litedram.phy import GW5DDRPHY from litex.build.io import DDROutput from litex_boards.platforms import sipeed_tang_mega_138k # CRG ---------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq, with_sdram=False, sdram_rate="1:2", with_ddr3=False, with_video_pll=False): self.rst = Signal() self.cd_sys = ClockDomain() self.cd_por = ClockDomain() if with_sdram: if sdram_rate == "1:2": self.cd_sys2x = ClockDomain() self.cd_sys2x_ps = ClockDomain() else: self.cd_sys_ps = ClockDomain() if with_ddr3: self.cd_init = ClockDomain() self.cd_sys2x = ClockDomain() self.cd_sys2x_i = ClockDomain() self.stop = Signal() self.reset = Signal() # Clk self.clk50 = platform.request("clk50") rst = platform.request("rst") # Power on reset por_count = Signal(16, reset=2**16-1) por_done = Signal() self.comb += self.cd_por.clk.eq(self.clk50) self.comb += por_done.eq(por_count == 0) self.sync.por += If(~por_done, por_count.eq(por_count - 1)) # PLL self.pll = pll = GW5APLL(devicename=platform.devicename, device=platform.device) self.comb += pll.reset.eq(~por_done | self.rst | rst) pll.register_clkin(self.clk50, 50e6) pll.create_clkout(self.cd_sys, sys_clk_freq, with_reset=not with_ddr3) # SDRAM clock if with_sdram: if sdram_rate == "1:2": pll.create_clkout(self.cd_sys2x, 2*sys_clk_freq) pll.create_clkout(self.cd_sys2x_ps, 2*sys_clk_freq, phase=180) sdram_clk = ClockSignal("sys2x_ps") else: pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=90) sdram_clk = ClockSignal("sys_ps") self.specials += DDROutput(1, 0, platform.request("sdram_clock"), sdram_clk) # DDR3 clock if with_ddr3: pll.create_clkout(self.cd_sys2x_i, 2*sys_clk_freq) self.specials += [ Instance("DHCE", i_CLKIN = self.cd_sys2x_i.clk, i_CEN = self.stop, o_CLKOUT = self.cd_sys2x.clk ), AsyncResetSynchronizer(self.cd_sys, ~pll.locked | self.rst | self.reset), ] # Init clock domain self.comb += self.cd_init.clk.eq(self.clk50) self.comb += self.cd_init.rst.eq(pll.reset) if with_video_pll: self.cd_hdmi = ClockDomain() self.cd_hdmi5x = ClockDomain() pll.create_clkout(self.cd_hdmi5x, 125e6, margin=1e-3) self.specials += Instance("CLKDIV", p_DIV_MODE = "5", i_HCLKIN = self.cd_hdmi5x.clk, i_RESETN = 1, # Disable reset signal. i_CALIB = 0, # No calibration. o_CLKOUT = self.cd_hdmi.clk ) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=50e6, with_ethernet = True, with_etherbone = False, local_ip = "192.168.1.50", remote_ip = "", eth_dynamic_ip = False, with_video_terminal = False, with_ddr3 = False, with_sdram = False, sdram_rate = "1:2", with_led_chaser = True, with_rgb_led = False, with_buttons = True, **kwargs): platform = sipeed_tang_mega_138k.Platform(toolchain="gowin") # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq, with_sdram = with_sdram, with_ddr3 = with_ddr3, with_video_pll = with_video_terminal) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Tang Mega 138K", **kwargs) # DDR3 SDRAM ------------------------------------------------------------------------------- if with_ddr3 and not self.integrated_main_ram_size: self.ddrphy = GW5DDRPHY( pads = platform.request("ddram"), sys_clk_freq = sys_clk_freq ) self.ddrphy.settings.rtt_nom = "disabled" self.comb += self.crg.stop.eq(self.ddrphy.init.stop) self.comb += self.crg.reset.eq(self.ddrphy.init.reset) self.add_sdram("sdram", phy = self.ddrphy, module = MT41K64M16(sys_clk_freq, "1:2"), l2_cache_size = 0#kwargs.get("l2_size", 8192) ) # Video ------------------------------------------------------------------------------------ if with_video_terminal: hdmi_pads = platform.request("hdmi_in") # yes DVI_RX because DVI_TX seems not working self.comb += hdmi_pads.hdp.eq(1) self.videophy = VideoGowinHDMIPHY(hdmi_pads, clock_domain="hdmi") #self.add_video_colorbars(phy=self.videophy, timings="640x480@60Hz", clock_domain="hdmi") self.add_video_terminal(phy=self.videophy, timings="640x480@75Hz", clock_domain="hdmi") # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.leds = LedChaser( pads = platform.request_all("led_n"), sys_clk_freq = sys_clk_freq ) # Ethernet / Etherbone --------------------------------------------------------------------- if with_ethernet or with_etherbone: self.ethphy = LiteEthPHYRGMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth"), tx_delay = 2e-9, rx_delay = 2e-9) self.clk50_half = Signal() self.specials += Instance("CLKDIV", p_DIV_MODE = "2", i_HCLKIN = self.crg.clk50, i_RESETN = 1, i_CALIB = 0, o_CLKOUT = self.clk50_half) self.specials += DDROutput(1, 0, platform.request("ephy_clk"), self.clk50_half) if with_ethernet: self.add_ethernet(phy=self.ethphy, dynamic_ip=eth_dynamic_ip, data_width=32, software_debug=True) if with_etherbone: self.add_etherbone(phy=self.ethphy, data_width=32) if local_ip: local_ip = local_ip.split(".") self.add_constant("LOCALIP1", int(local_ip[0])) self.add_constant("LOCALIP2", int(local_ip[1])) self.add_constant("LOCALIP3", int(local_ip[2])) self.add_constant("LOCALIP4", int(local_ip[3])) if remote_ip: remote_ip = remote_ip.split(".") self.add_constant("REMOTEIP1", int(remote_ip[0])) self.add_constant("REMOTEIP2", int(remote_ip[1])) self.add_constant("REMOTEIP3", int(remote_ip[2])) self.add_constant("REMOTEIP4", int(remote_ip[3])) # SDR SDRAM -------------------------------------------------------------------------------- if with_sdram and not self.integrated_main_ram_size: if sdram_rate == "1:2": sdrphy_cls = HalfRateGENSDRPHY else: sdrphy_cls = GENSDRPHY self.sdrphy = sdrphy_cls(platform.request("sdram"), sys_clk_freq) self.add_sdram("sdram", phy = self.sdrphy, module = AS4C32M16(sys_clk_freq, sdram_rate), l2_cache_size = kwargs.get("l2_size", 8192) ) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=sipeed_tang_mega_138k.Platform, description="LiteX SoC on Tang Mega 138K.") 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("--with-sdram", action="store_true", help="Enable optional SDRAM module.") parser.add_target_argument("--with-ddr3", action="store_true", help="Enable optional DDR3 module.") parser.add_target_argument("--with-video-terminal", action="store_true", help="Enable Video Terminal (HDMI).") ethopts = parser.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.") parser.add_target_argument("--eth-dynamic-ip", action="store_true", help="Enable dynamic Ethernet IP addresses setting.") parser.add_target_argument("--remote-ip", default="192.168.1.100", help="Remote IP address of TFTP server.") parser.add_target_argument("--local-ip", default="192.168.1.50", help="Local IP address.") args = parser.parse_args() assert not (args.with_etherbone and args.eth_dynamic_ip) soc = BaseSoC( sys_clk_freq = args.sys_clk_freq, with_video_terminal = args.with_video_terminal, with_ddr3 = args.with_ddr3, with_sdram = args.with_sdram, with_ethernet = args.with_ethernet, with_etherbone = args.with_etherbone, local_ip = args.local_ip, remote_ip = args.remote_ip, eth_dynamic_ip = args.eth_dynamic_ip, **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", ext=".fs"), external=True) if __name__ == "__main__": main()