litex-boards/litex_boards/targets/hadbadge.py

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#!/usr/bin/env python3
# This file is Copyright (c) 2020 Michael Welling <mwelling@ieee.org>
# This file is Copyright (c) 2020 Sean Cross <sean@xobs.io>
# This file is Copyright (c) 2020 Drew Fustini <drew@pdp7.com>
# This file is Copyright (c) 2020 Florent Kermarrec <florent@enjoy-digital.fr>
# License: BSD
import argparse
import sys
from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from litex_boards.platforms import hadbadge
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
from litedram.modules import AS4C32M8
# 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)
# # #
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# Clk / Rst
clk8 = platform.request("clk8")
platform.add_period_constraint(clk8, 1e9/8e6)
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# PLL
self.submodules.pll = pll = ECP5PLL()
pll.register_clkin(clk8, 8e6)
pll.create_clkout(self.cd_sys, sys_clk_freq)
pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=90)
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self.specials += AsyncResetSynchronizer(self.cd_sys, ~pll.locked)
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# SDRAM clock
self.comb += platform.request("sdram_clock").eq(self.cd_sys_ps.clk)
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
def __init__(self, toolchain="trellis", sys_clk_freq=int(48e6), sdram_module_cls="AS4C32M8", **kwargs):
platform = hadbadge.Platform(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"), cl=2)
self.add_sdram("sdram",
phy = self.sdrphy,
module = AS4C32M8(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 Hackaday Badge")
parser.add_argument("--gateware-toolchain", dest="toolchain", default="trellis",
help="gateware toolchain to use, trellis (default) or diamond")
parser.add_argument("--sys-clk-freq", default=48e6,
help="system clock frequency (default=48MHz)")
builder_args(parser)
soc_sdram_args(parser)
trellis_args(parser)
args = parser.parse_args()
soc = BaseSoC(toolchain=args.toolchain,
sys_clk_freq=int(float(args.sys_clk_freq)),
**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()