104 lines
3.9 KiB
Python
Executable File
104 lines
3.9 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) 2020 Mark Standke <mstandke@cern.ch>
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# SPDX-License-Identifier: BSD-2-Clause
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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 kx2
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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_sdram 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 litedram.modules import H5TC4G63CFR
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from litedram.phy import s7ddrphy
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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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self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
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self.clock_domains.cd_clk200 = ClockDomain()
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# # #
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self.submodules.pll = pll = S7MMCM(speedgrade=-2)
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self.comb += pll.reset.eq(~platform.request("cpu_reset_n"))
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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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pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq)
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pll.create_clkout(self.cd_clk200, 200e6)
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self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_clk200)
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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 = kx2.Platform()
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, sys_clk_freq,
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ident = "LiteX SoC on KX2",
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ident_version = True,
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**kwargs)
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# CRG --------------------------------------------------------------------------------------
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self.submodules.crg = _CRG(platform, sys_clk_freq)
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# DDR3 SDRAM -------------------------------------------------------------------------------
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if not self.integrated_main_ram_size:
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self.submodules.ddrphy = s7ddrphy.K7DDRPHY(platform.request("ddram"),
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memtype = "DDR3",
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nphases = 4,
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sys_clk_freq = sys_clk_freq,
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cmd_latency = 1)
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self.add_csr("ddrphy")
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self.add_sdram("sdram",
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phy = self.ddrphy,
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module = H5TC4G63CFR(sys_clk_freq, "1:4"),
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origin = self.mem_map["main_ram"],
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size = kwargs.get("max_sdram_size", 0x40000000),
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l2_cache_size = kwargs.get("l2_size", 8192),
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l2_cache_min_data_width = kwargs.get("min_l2_data_width", 128),
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l2_cache_reverse = True
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)
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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(4)]),
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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 KX2")
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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_sdram_args(parser)
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args = parser.parse_args()
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soc = BaseSoC(**soc_sdram_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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