109 lines
3.8 KiB
Python
Executable File
109 lines
3.8 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) 2024 Enjoy-Digital <enjoy-digital.fr>
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#
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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.gen import *
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from litex_boards.platforms import lattice_certuspro_nx_evn
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from litex.build.io import CRG
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from litex.build.generic_platform import *
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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.soc import SoCRegion
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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(LiteXModule):
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def __init__(self, platform, sys_clk_freq):
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self.rst = Signal()
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self.cd_sys = ClockDomain()
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self.cd_por = ClockDomain()
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# # #
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# Clk / Rst
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self.clk125 = platform.request("clk125")
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self.rst_n = platform.request("user_btn", 0)
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# Clocking
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self.hf_clk = NXOSCA(platform)
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hf_clk_freq = 25e6
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self.hf_clk.create_hf_clk(self.cd_por, hf_clk_freq)
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# Power on reset
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por_count = Signal(16, reset=2**16-1)
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por_done = Signal()
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self.comb += por_done.eq(por_count == 0)
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self.sync.por += If(~por_done, por_count.eq(por_count - 1))
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self.specials += AsyncResetSynchronizer(self.cd_por, ~self.rst_n)
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# PLL
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self.sys_pll = sys_pll = NXPLL(platform=platform, create_output_port_clocks=True)
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self.comb += sys_pll.reset.eq(self.rst | ~por_done)
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sys_pll.register_clkin(self.clk125, 125e6)
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sys_pll.create_clkout(self.cd_sys, sys_clk_freq)
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self.specials += AsyncResetSynchronizer(self.cd_sys, ~self.sys_pll.locked)
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# BaseSoC ------------------------------------------------------------------------------------------
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class BaseSoC(SoCCore):
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def __init__(self, sys_clk_freq=75e6, toolchain="radiant",
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with_led_chaser = True,
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**kwargs):
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platform = lattice_certuspro_nx_evn.Platform(toolchain=toolchain)
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# CRG --------------------------------------------------------------------------------------
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self.crg = _CRG(platform, sys_clk_freq)
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# SoCCore -----------------------------------------_----------------------------------------
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SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on CertusPro-NX Eval Board", **kwargs)
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# Leds -------------------------------------------------------------------------------------
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if with_led_chaser:
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self.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.build.parser import LiteXArgumentParser
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parser = LiteXArgumentParser(platform=lattice_certuspro_nx_evn.Platform, description="LiteX SoC on CertusPro-NX EVN Board.")
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parser.add_target_argument("--sys-clk-freq", default=75e6, type=float, help="System clock frequency.")
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parser.add_target_argument("--flash", action="store_true", help="Flash bitstream to SPI Flash.")
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args = parser.parse_args()
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soc = BaseSoC(
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sys_clk_freq = args.sys_clk_freq,
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**parser.soc_argdict
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)
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builder = Builder(soc, **parser.builder_argdict)
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if args.build:
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builder.build(**parser.toolchain_argdict)
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if args.load:
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prog = soc.platform.create_programmer(args.prog_target)
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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(args.prog_target)
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prog.load_bitstream(0, builder.get_bitstream_filename(mode="flash"))
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if __name__ == "__main__":
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main()
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