#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2021 Florent Kermarrec # Copyright (c) 2021 Greg Davill # SPDX-License-Identifier: BSD-2-Clause # Build/Use: # ./gsd_butterstick.py --uart-name=crossover --with-etherbone --csr-csv=csr.csv --build --load --programmer (jtag / dfu) # litex_server --udp # litex_term crossover from migen import * from migen.genlib.resetsync import AsyncResetSynchronizer from litex.gen import * from litex_boards.platforms import gsd_butterstick from litex.soc.cores.clock import * from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.cores.led import LedChaser from litex.soc.cores.gpio import GPIOTristate from litedram.modules import MT41K64M16,MT41K128M16,MT41K256M16,MT41K512M16 from litedram.phy import ECP5DDRPHY from liteeth.phy.ecp5rgmii import LiteEthPHYRGMII # CRG --------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq): self.rst = Signal() self.cd_init = ClockDomain() self.cd_por = ClockDomain() self.cd_sys = ClockDomain() self.cd_sys2x = ClockDomain() self.cd_sys2x_i = ClockDomain() # # # self.stop = Signal() self.reset = Signal() # Clk / Rst clk30 = platform.request("clk30") rst_n = platform.request("user_btn", 0) # Power on reset por_count = Signal(16, reset=2**16-1) por_done = Signal() self.comb += self.cd_por.clk.eq(clk30) self.comb += por_done.eq(por_count == 0) self.sync.por += If(~por_done, por_count.eq(por_count - 1)) # PLL self.pll = pll = ECP5PLL() self.comb += pll.reset.eq(~por_done | ~rst_n | self.rst) pll.register_clkin(clk30, 30e6) pll.create_clkout(self.cd_sys2x_i, 2*sys_clk_freq) pll.create_clkout(self.cd_init, 25e6) self.specials += [ Instance("ECLKSYNCB", i_ECLKI = self.cd_sys2x_i.clk, i_STOP = self.stop, o_ECLKO = self.cd_sys2x.clk), Instance("CLKDIVF", p_DIV = "2.0", i_ALIGNWD = 0, i_CLKI = self.cd_sys2x.clk, i_RST = self.reset, o_CDIVX = self.cd_sys.clk), AsyncResetSynchronizer(self.cd_sys, ~pll.locked | self.reset), ] # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, revision="1.0", device="85F", sys_clk_freq=60e6, toolchain="trellis", sdram_device = "MT41K64M16", with_ethernet = False, with_etherbone = False, eth_ip = "192.168.1.50", eth_dynamic_ip = False, with_spi_flash = False, with_led_chaser = True, with_syzygy_gpio = True, **kwargs) : platform = gsd_butterstick.Platform(revision=revision, device=device ,toolchain=toolchain) # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq) # SoCCore ---------------------------------------------------------------------------------- if kwargs["uart_name"] == "serial": kwargs["uart_name"] = "crossover" SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on ButterStick", **kwargs) # DDR3 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: available_sdram_modules = { "MT41K64M16": MT41K64M16, "MT41K128M16": MT41K128M16, "MT41K256M16": MT41K256M16, "MT41K512M16": MT41K512M16, } sdram_module = available_sdram_modules.get(sdram_device) self.ddrphy = ECP5DDRPHY( platform.request("ddram"), sys_clk_freq=sys_clk_freq) 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 = sdram_module(sys_clk_freq, "1:2"), l2_cache_size = kwargs.get("l2_size", 8192) ) # Ethernet / Etherbone --------------------------------------------------------------------- if with_ethernet or with_etherbone: self.ethphy = LiteEthPHYRGMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth"), rx_delay = 0e-9, # KSZ9031RNX phy adds a 1.2ns RX delay ) 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) # SPI Flash -------------------------------------------------------------------------------- if with_spi_flash: from litespi.modules import W25Q128JV from litespi.opcodes import SpiNorFlashOpCodes as Codes self.add_spi_flash(mode="4x", module=W25Q128JV(Codes.READ_1_1_4), with_master=False) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.comb += platform.request("user_led_color").eq(0b010) # Blue. self.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # GPIOs ------------------------------------------------------------------------------------ if with_syzygy_gpio: platform.add_extension(gsd_butterstick.raw_syzygy_io("SYZYGY0")) self.gpio = GPIOTristate(platform.request("SYZYGY0")) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=gsd_butterstick.Platform, description="LiteX SoC on ButterStick.") parser.add_target_argument("--programmer", default="jtag", help="Programming interface (jtag or dfu).") parser.add_target_argument("--sys-clk-freq", default=75e6, type=float, help="System clock frequency.") parser.add_target_argument("--revision", default="1.0", help="Board Revision (1.0).") parser.add_target_argument("--device", default="85F", help="ECP5 device (25F, 45F, 85F).") parser.add_target_argument("--sdram-device", default="MT41K64M16", help="SDRAM device (MT41K64M16, MT41K128M16, MT41K256M16 or MT41K512M16).") 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-spi-flash", action="store_true", help="Enable SPI Flash (MMAPed).") sdopts = parser.target_group.add_mutually_exclusive_group() sdopts.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.") sdopts.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support.") parser.add_target_argument("--with-syzygy-gpio",action="store_true", help="Enable GPIOs through SYZYGY Breakout on Port-A.") args = parser.parse_args() assert not (args.with_etherbone and args.eth_dynamic_ip) soc = BaseSoC( toolchain = args.toolchain, revision = args.revision, device = args.device, sdram_device = args.sdram_device, sys_clk_freq = args.sys_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_spi_flash = args.with_spi_flash, with_syzygy_gpio = args.with_syzygy_gpio, **parser.soc_argdict) if args.with_spi_sdcard: soc.add_spi_sdcard() if args.with_sdcard: soc.add_sdcard() builder = Builder(soc, **parser.builder_argdict) if args.build: builder.build(**parser.toolchain_argdict) if args.load: prog = soc.platform.create_programmer(args.programmer) prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if __name__ == "__main__": main()