68 lines
2.4 KiB
Python
68 lines
2.4 KiB
Python
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#!/usr/bin/env python3
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# This file is Copyright (c) 2020 Florent Kermarrec <florent@enjoy-digital.fr>
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# License: BSD
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import os
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import argparse
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from migen import *
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from litex_boards.platforms import forest_kitten_33
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from litex.soc.cores.clock import *
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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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# CRG ----------------------------------------------------------------------------------------------
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class _CRG(Module):
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def __init__(self, platform, sys_clk_freq):
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self.clock_domains.cd_sys = ClockDomain()
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# # #
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self.submodules.pll = pll = USMMCM(speedgrade=-2)
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pll.register_clkin(platform.request("clk200"), 200e6)
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pll.create_clkout(self.cd_sys, sys_clk_freq)
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# BaseSoC ------------------------------------------------------------------------------------------
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class BaseSoC(SoCCore):
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def __init__(self, sys_clk_freq=int(125e6), **kwargs):
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platform = forest_kitten_33.Platform()
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, clk_freq=sys_clk_freq, **kwargs)
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# CRG --------------------------------------------------------------------------------------
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self.submodules.crg = _CRG(platform, sys_clk_freq)
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# Leds -------------------------------------------------------------------------------------
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self.submodules.leds = LedChaser(
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pads = Cat(*[platform.request("user_led", i) for i in range(7)]),
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sys_clk_freq = sys_clk_freq)
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self.add_csr("leds")
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# Build --------------------------------------------------------------------------------------------
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def main():
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parser = argparse.ArgumentParser(description="LiteX SoC on Forest Kitten 33")
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parser.add_argument("--build", action="store_true", help="Build bitstream")
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parser.add_argument("--load", action="store_true", help="Load bitstream")
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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(**soc_core_argdict(args))
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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(os.path.join(builder.gateware_dir, soc.build_name + ".bit"))
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if __name__ == "__main__":
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main()
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