litex-boards/litex_boards/targets/simple.py

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#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2014-2020 Florent Kermarrec <florent@enjoy-digital.fr>
# Copyright (c) 2013-2014 Sebastien Bourdeauducq <sb@m-labs.hk>
# SPDX-License-Identifier: BSD-2-Clause
import importlib
from migen import *
from litex.build.io import CRG
from litex.soc.integration.soc_core import *
from litex.soc.integration.builder import *
from litex.soc.cores.led import LedChaser
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
def __init__(self, platform, with_ethernet=False, with_led_chaser=True, **kwargs):
sys_clk_freq = int(1e9/platform.default_clk_period)
# CRG --------------------------------------------------------------------------------------
self.submodules.crg = CRG(platform.request(platform.default_clk_name))
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX Simple SoC", **kwargs)
# Leds -------------------------------------------------------------------------------------
try:
if with_led_chaser:
self.submodules.leds = LedChaser(
pads = platform.request_all("user_led"),
sys_clk_freq = sys_clk_freq)
except:
pass
# Build --------------------------------------------------------------------------------------------
def main():
from litex.soc.integration.soc import LiteXSoCArgumentParser
parser = LiteXSoCArgumentParser(description="Generic LiteX SoC")
target_group = parser.add_argument_group(title="Target options")
target_group.add_argument("platform", help="Module name of the platform to build for.")
target_group.add_argument("--build", action="store_true", help="Build bitstream.")
target_group.add_argument("--load", action="store_true", help="Load bitstream.")
target_group.add_argument("--toolchain", default=None, help="FPGA toolchain.")
builder_args(parser)
soc_core_args(parser)
args = parser.parse_args()
platform_module = importlib.import_module(args.platform)
platform_kwargs = {}
if args.toolchain is not None:
platform_kwargs["toolchain"] = args.toolchain
platform = platform_module.Platform(**platform_kwargs)
soc = BaseSoC(platform,**soc_core_argdict(args))
builder = Builder(soc, **builder_argdict(args))
builder.build(run=args.build)
if args.load:
prog = soc.platform.create_programmer()
prog.load_bitstream(builder.get_bitstream_filename(mode="sram"))
if __name__ == "__main__":
main()