107 lines
4.3 KiB
Python
Executable File
107 lines
4.3 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
# This file is Copyright (c) 2018-2019 Florent Kermarrec <florent@enjoy-digital.fr>
|
|
# This file is Copyright (c) 2018 David Shah <dave@ds0.me>
|
|
# License: BSD
|
|
|
|
import argparse
|
|
import sys
|
|
|
|
from migen import *
|
|
from migen.genlib.resetsync import AsyncResetSynchronizer
|
|
|
|
from litex_boards.platforms import ulx3s
|
|
|
|
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.soc_sdram import *
|
|
from litex.soc.integration.builder import *
|
|
|
|
from litedram import modules as litedram_modules
|
|
from litedram.phy import GENSDRPHY
|
|
|
|
# CRG ----------------------------------------------------------------------------------------------
|
|
|
|
class _CRG(Module):
|
|
def __init__(self, platform, sys_clk_freq):
|
|
self.clock_domains.cd_sys = ClockDomain()
|
|
self.clock_domains.cd_sys_ps = ClockDomain(reset_less=True)
|
|
|
|
# # #
|
|
|
|
# Clk / Rst
|
|
clk25 = platform.request("clk25")
|
|
rst = platform.request("rst")
|
|
platform.add_period_constraint(clk25, 1e9/25e6)
|
|
|
|
# PLL
|
|
self.submodules.pll = pll = ECP5PLL()
|
|
self.comb += pll.reset.eq(rst)
|
|
pll.register_clkin(clk25, 25e6)
|
|
pll.create_clkout(self.cd_sys, sys_clk_freq)
|
|
pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=90)
|
|
self.specials += AsyncResetSynchronizer(self.cd_sys, ~pll.locked | rst)
|
|
|
|
# SDRAM clock
|
|
self.comb += platform.request("sdram_clock").eq(self.cd_sys_ps.clk)
|
|
|
|
# Prevent ESP32 from resetting FPGA
|
|
self.comb += platform.request("wifi_gpio0").eq(1)
|
|
|
|
# BaseSoC ------------------------------------------------------------------------------------------
|
|
|
|
class BaseSoC(SoCCore):
|
|
def __init__(self, device="LFE5U-45F", toolchain="trellis",
|
|
sys_clk_freq=int(50e6), sdram_module_cls="MT48LC16M16", **kwargs):
|
|
|
|
platform = ulx3s.Platform(device=device, toolchain=toolchain)
|
|
|
|
# SoCCore ----------------------------------------------------------------------------------
|
|
SoCCore.__init__(self, platform, clk_freq=sys_clk_freq, **kwargs)
|
|
|
|
# CRG --------------------------------------------------------------------------------------
|
|
self.submodules.crg = _CRG(platform, sys_clk_freq)
|
|
|
|
# SDR SDRAM --------------------------------------------------------------------------------
|
|
if not self.integrated_main_ram_size:
|
|
self.submodules.sdrphy = GENSDRPHY(platform.request("sdram"))
|
|
self.add_sdram("sdram",
|
|
phy = self.sdrphy,
|
|
module = getattr(litedram_modules, sdram_module_cls)(sys_clk_freq, "1:1"),
|
|
origin = self.mem_map["main_ram"],
|
|
size = kwargs.get("max_sdram_size", 0x40000000),
|
|
l2_cache_size = kwargs.get("l2_size", 8192),
|
|
l2_cache_min_data_width = kwargs.get("min_l2_data_width", 128),
|
|
l2_cache_reverse = True
|
|
)
|
|
|
|
# Build --------------------------------------------------------------------------------------------
|
|
|
|
def main():
|
|
parser = argparse.ArgumentParser(description="LiteX SoC on ULX3S")
|
|
parser.add_argument("--gateware-toolchain", dest="toolchain", default="trellis",
|
|
help="gateware toolchain to use, trellis (default) or diamond")
|
|
parser.add_argument("--device", dest="device", default="LFE5U-45F",
|
|
help="FPGA device, ULX3S can be populated with LFE5U-45F (default) or LFE5U-85F")
|
|
parser.add_argument("--sys-clk-freq", default=50e6,
|
|
help="system clock frequency (default=50MHz)")
|
|
parser.add_argument("--sdram-module", default="MT48LC16M16",
|
|
help="SDRAM module: MT48LC16M16, AS4C32M16 or AS4C16M16 (default=MT48LC16M16)")
|
|
builder_args(parser)
|
|
soc_sdram_args(parser)
|
|
trellis_args(parser)
|
|
args = parser.parse_args()
|
|
|
|
soc = BaseSoC(device=args.device, toolchain=args.toolchain,
|
|
sys_clk_freq=int(float(args.sys_clk_freq)),
|
|
sdram_module_cls=args.sdram_module,
|
|
**soc_sdram_argdict(args))
|
|
builder = Builder(soc, **builder_argdict(args))
|
|
builder_kargs = trellis_argdict(args) if args.toolchain == "trellis" else {}
|
|
builder.build(**builder_kargs)
|
|
|
|
if __name__ == "__main__":
|
|
main()
|