197 lines
7.7 KiB
Python
Executable File
197 lines
7.7 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
#
|
|
# This file is part of LiteX-Boards.
|
|
#
|
|
# Copyright (c) 2019 David Shah <dave@ds0.me>
|
|
# SPDX-License-Identifier: BSD-2-Clause
|
|
|
|
import os
|
|
import argparse
|
|
|
|
from migen import *
|
|
from migen.genlib.resetsync import AsyncResetSynchronizer
|
|
|
|
from litex_boards.platforms import trellisboard
|
|
|
|
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 litex.soc.cores.gpio import GPIOTristate
|
|
|
|
from litedram.modules import MT41J256M16
|
|
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_por = ClockDomain(reset_less=True)
|
|
self.clock_domains.cd_sys = ClockDomain()
|
|
|
|
# # #
|
|
|
|
# Clk / Rst
|
|
clk12 = platform.request("clk12")
|
|
rst = 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(clk12)
|
|
self.comb += por_done.eq(por_count == 0)
|
|
self.sync.por += If(~por_done, por_count.eq(por_count - 1))
|
|
|
|
# PLL
|
|
self.submodules.pll = pll = ECP5PLL()
|
|
self.comb += pll.reset.eq(~por_done | rst | self.rst)
|
|
pll.register_clkin(clk12, 12e6)
|
|
pll.create_clkout(self.cd_sys, sys_clk_freq)
|
|
|
|
|
|
class _CRGSDRAM(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
|
|
clk12 = platform.request("clk12")
|
|
rst = 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(clk12)
|
|
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 | self.rst)
|
|
pll.register_clkin(clk12, 12e6)
|
|
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),
|
|
]
|
|
|
|
self.comb += platform.request("dram_vtt_en").eq(1)
|
|
|
|
# BaseSoC ------------------------------------------------------------------------------------------
|
|
|
|
class BaseSoC(SoCCore):
|
|
def __init__(self, sys_clk_freq=int(75e6), toolchain="trellis", with_ethernet=False,
|
|
with_led_chaser=True, with_pmod_gpio=False, **kwargs):
|
|
platform = trellisboard.Platform(toolchain=toolchain)
|
|
|
|
# SoCCore ----------------------------------------------------------------------------------
|
|
SoCCore.__init__(self, platform, sys_clk_freq,
|
|
ident = "LiteX SoC on Trellis Board",
|
|
**kwargs)
|
|
|
|
# CRG --------------------------------------------------------------------------------------
|
|
crg_cls = _CRGSDRAM if not self.integrated_main_ram_size else _CRG
|
|
self.submodules.crg = crg_cls(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 = MT41J256M16(sys_clk_freq, "1:2"),
|
|
l2_cache_size = kwargs.get("l2_size", 8192),
|
|
)
|
|
|
|
# Ethernet ---------------------------------------------------------------------------------
|
|
if with_ethernet:
|
|
self.submodules.ethphy = LiteEthPHYRGMII(
|
|
clock_pads = self.platform.request("eth_clocks"),
|
|
pads = self.platform.request("eth"))
|
|
self.add_ethernet(phy=self.ethphy)
|
|
|
|
# Leds -------------------------------------------------------------------------------------
|
|
if with_led_chaser:
|
|
self.submodules.leds = LedChaser(
|
|
pads = platform.request_all("user_led"),
|
|
sys_clk_freq = sys_clk_freq)
|
|
|
|
# GPIOs ------------------------------------------------------------------------------------
|
|
if with_pmod_gpio:
|
|
platform.add_extension(trellisboard.raw_pmod_io("pmoda"))
|
|
self.submodules.gpio = GPIOTristate(platform.request("pmoda"))
|
|
|
|
# Build --------------------------------------------------------------------------------------------
|
|
|
|
def main():
|
|
parser = argparse.ArgumentParser(description="LiteX SoC on Trellis Board")
|
|
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 toolchain (trellis or diamond).")
|
|
parser.add_argument("--sys-clk-freq", default=75e6, help="System clock frequency.")
|
|
parser.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support.")
|
|
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.")
|
|
parser.add_argument("--with-pmod-gpio", action="store_true", help="Enable GPIOs through PMOD.") # FIXME: Temporary test.
|
|
builder_args(parser)
|
|
soc_core_args(parser)
|
|
trellis_args(parser)
|
|
args = parser.parse_args()
|
|
|
|
soc = BaseSoC(
|
|
sys_clk_freq = int(float(args.sys_clk_freq)),
|
|
with_ethernet = args.with_ethernet,
|
|
with_pmod_gpio = args.with_pmod_gpio,
|
|
**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 + ".svf"))
|
|
|
|
if __name__ == "__main__":
|
|
main()
|