litex-boards/litex_boards/targets/myminieye_runber.py

89 lines
3.2 KiB
Python
Executable File

#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2021 Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
# SPDX-License-Identifier: BSD-2-Clause
from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from litex.soc.integration.soc_core import *
from litex.soc.integration.builder import *
from litex.soc.cores.led import LedChaser
from litex_boards.platforms import runber
# CRG ----------------------------------------------------------------------------------------------
class _CRG(Module):
def __init__(self, platform, sys_clk_freq):
self.rst = Signal()
self.clock_domains.cd_sys = ClockDomain()
# # #
# Clk / Rst
clk12 = platform.request("clk12")
rst_n = platform.request("user_btn", 0)
self.comb += self.cd_sys.clk.eq(clk12)
self.specials += AsyncResetSynchronizer(self.cd_sys, ~rst_n)
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
def __init__(self, sys_clk_freq=int(12e6), with_led_chaser=True, **kwargs):
platform = runber.Platform()
# Disable CPU for now.
kwargs["cpu_type"] = None
kwargs["integrated_sram_size"] = 0
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self, platform, sys_clk_freq,
ident = "LiteX SoC on Runber",
**kwargs)
# CRG --------------------------------------------------------------------------------------
self.submodules.crg = _CRG(platform, sys_clk_freq)
# Leds -------------------------------------------------------------------------------------
if with_led_chaser:
self.submodules.leds = LedChaser(
pads = platform.request_all("user_led"),
sys_clk_freq = sys_clk_freq)
# Build --------------------------------------------------------------------------------------------
def main():
from litex.soc.integration.soc import LiteXSoCArgumentParser
parser = LiteXSoCArgumentParser(description="LiteX SoC on Runber")
target_group = parser.add_argument_group(title="Target options")
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("--flash", action="store_true", help="Flash Bitstream.")
target_group.add_argument("--sys-clk-freq",default=12e6, help="System clock frequency.")
builder_args(parser)
soc_core_args(parser)
args = parser.parse_args()
soc = BaseSoC(
sys_clk_freq = int(float(args.sys_clk_freq)),
**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 args.flash:
prog = soc.platform.create_programmer()
prog.flash(0, builder.get_bitstream_filename(mode="flash", ext=".fs")) # FIXME
if __name__ == "__main__":
main()