#!/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 # litex_server --udp # litex_term bridge import os import sys import argparse from migen import * from migen.genlib.resetsync import AsyncResetSynchronizer from litex_boards.platforms import butterstick from litex.build.lattice.trellis import trellis_args, trellis_argdict 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 litedram.modules import MT41K256M16 from litedram.phy import ECP5DDRPHY from liteeth.phy.ecp5rgmii import LiteEthPHYRGMII # CRG --------------------------------------------------------------------------------------------- class _CRG(Module): def __init__(self, platform, sys_clk_freq): self.rst = Signal() self.clock_domains.cd_init = ClockDomain() self.clock_domains.cd_por = ClockDomain(reset_less=True) self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_sys2x = ClockDomain() self.clock_domains.cd_sys2x_i = ClockDomain(reset_less=True) # # # 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 sys2x_clk_ecsout = Signal() self.submodules.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("ECLKBRIDGECS", i_CLK0 = self.cd_sys2x_i.clk, i_SEL = 0, o_ECSOUT = sys2x_clk_ecsout, ), Instance("ECLKSYNCB", i_ECLKI = sys2x_clk_ecsout, 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), AsyncResetSynchronizer(self.cd_sys2x, ~pll.locked | self.reset), ] # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, revision="1.0", device="25F", sys_clk_freq=int(60e6), toolchain="trellis", with_ethernet=False, with_etherbone=False, eth_ip="192.168.1.50", eth_dynamic_ip=False, with_spi_flash=False, with_led_chaser=True, **kwargs) : platform = butterstick.Platform(revision=revision, device=device ,toolchain=toolchain) # SoCCore ---------------------------------------------------------------------------------- if kwargs["uart_name"] == "serial": kwargs["uart_name"] = "crossover" SoCCore.__init__(self, platform, sys_clk_freq, ident = "LiteX SoC on ButterStick", ident_version = True, **kwargs) # CRG -------------------------------------------------------------------------------------- self.submodules.crg = _CRG(platform, sys_clk_freq) # DDR3 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.submodules.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 = MT41K256M16(sys_clk_freq, "1:2"), l2_cache_size = kwargs.get("l2_size", 8192) ) # Ethernet / Etherbone --------------------------------------------------------------------- if with_ethernet or with_etherbone: self.submodules.ethphy = LiteEthPHYRGMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth")) 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.submodules.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # Build -------------------------------------------------------------------------------------------- def main(): parser = argparse.ArgumentParser(description="LiteX SoC on ButterStick") parser.add_argument("--build", action="store_true", help="Build bitstream") parser.add_argument("--load", action="store_true", help="Load bitstream") parser.add_argument("--toolchain", default="trellis", help="FPGA use, trellis (default) or diamond") parser.add_argument("--sys-clk-freq", default=75e6, help="System clock frequency (default: 75MHz)") parser.add_argument("--revision", default="1.0", help="Board Revision: 1.0 (default)") parser.add_argument("--device", default="85F", help="ECP5 device (default: 85F)") ethopts = parser.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_argument("--eth-ip", default="192.168.1.50", help="Ethernet/Etherbone IP address") parser.add_argument("--eth-dynamic-ip", action="store_true", help="Enable dynamic Ethernet IP addresses setting") parser.add_argument("--with-spi-flash", action="store_true", help="Enable SPI Flash (MMAPed)") sdopts = parser.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") builder_args(parser) soc_core_args(parser) trellis_args(parser) 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, sys_clk_freq = int(float(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, **soc_core_argdict(args)) if args.with_spi_sdcard: soc.add_spi_sdcard() if args.with_sdcard: soc.add_sdcard() builder = Builder(soc, **builder_argdict(args)) builder_kargs = trellis_argdict(args) if args.toolchain == "trellis" else {} builder.build(**builder_kargs, run=args.build) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(os.path.join(builder.gateware_dir, soc.build_name + ".bit")) if __name__ == "__main__": main()