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