litex-boards/litex_boards/targets/myminieye_runber.py

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#!/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.gen import *
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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 myminieye_runber
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# CRG ----------------------------------------------------------------------------------------------
class _CRG(LiteXModule):
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def __init__(self, platform, sys_clk_freq):
self.rst = Signal()
self.cd_sys = ClockDomain()
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# # #
# 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=12e6, with_led_chaser=True, **kwargs):
platform = myminieye_runber.Platform()
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# CRG --------------------------------------------------------------------------------------
self.crg = _CRG(platform, sys_clk_freq)
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# SoCCore ----------------------------------------------------------------------------------
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# Disable CPU for now.
kwargs["cpu_type"] = None
kwargs["integrated_sram_size"] = 0
SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Runber", **kwargs)
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# Leds -------------------------------------------------------------------------------------
if with_led_chaser:
self.leds = LedChaser(
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pads = platform.request_all("user_led"),
sys_clk_freq = sys_clk_freq)
# Build --------------------------------------------------------------------------------------------
def main():
from litex.build.parser import LiteXArgumentParser
parser = LiteXArgumentParser(platform=myminieye_runber.Platform, description="LiteX SoC on Runber.")
parser.add_target_argument("--flash", action="store_true", help="Flash Bitstream.")
parser.add_target_argument("--sys-clk-freq",default=12e6, type=float, help="System clock frequency.")
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args = parser.parse_args()
soc = BaseSoC(
sys_clk_freq = args.sys_clk_freq,
**parser.soc_argdict
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)
builder = Builder(soc, **parser.builder_argdict)
if args.build:
builder.build(**parser.toolchain_argdict)
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if args.load:
prog = soc.platform.create_programmer()
prog.load_bitstream(builder.get_bitstream_filename(mode="sram"))
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if args.flash:
prog = soc.platform.create_programmer()
prog.flash(0, builder.get_bitstream_filename(mode="flash", ext=".fs")) # FIXME
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if __name__ == "__main__":
main()