mirror of
https://github.com/litex-hub/litex-boards.git
synced 2025-01-03 03:43:36 -05:00
00ff61baa9
rst was not directly assigned/used on reset_less clock domains, so reset_less property was not really useful. With the changes on stream.CDC, having a rst (Even fixed at 0) is now mandatory on clock domains involved in the CDC, so this also fixes targets.
123 lines
5.3 KiB
Python
Executable file
123 lines
5.3 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) 2015-2019 Florent Kermarrec <florent@enjoy-digital.fr>
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# Copyright (c) 2020-2021 Romain Dolbeau <romain@dolbeau.org>
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# SPDX-License-Identifier: BSD-2-Clause
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# Support for the ZTEX USB-FGPA Module 2.13:https://www.ztex.de/usb-fpga-2/usb-fpga-2.13.e.html.
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# With (no-so-optional) expansion, either the ZTEX Debug board:
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# https://www.ztex.de/usb-fpga-2/debug.e.html
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# Or the SBusFPGA adapter board:
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# https://github.com/rdolbeau/SBusFPGA
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from migen import *
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from litex_boards.platforms import ztex213
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from litex.build.xilinx.vivado import vivado_build_args, vivado_build_argdict
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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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from litedram.modules import MT41J128M16
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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()
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self.clock_domains.cd_sys4x_dqs = ClockDomain()
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self.clock_domains.cd_idelay = ClockDomain()
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self.clock_domains.cd_por = ClockDomain()
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# # #
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clk48 = platform.request("clk48")
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self.submodules.pll = pll = S7MMCM(speedgrade=-1)
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pll.register_clkin(clk48, 48e6)
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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_sys4x_dqs, 4*sys_clk_freq, phase=90)
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pll.create_clkout(self.cd_idelay, 200e6)
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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 += self.cd_por.clk.eq(clk48)
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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.comb += pll.reset.eq(~por_done)
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self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay)
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# BaseSoC ------------------------------------------------------------------------------------------
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class BaseSoC(SoCCore):
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def __init__(self, variant="ztex2.13a", sys_clk_freq=int(100e6), expansion="debug",
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with_led_chaser=True, **kwargs):
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platform = ztex213.Platform(variant=variant, expansion=expansion)
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, sys_clk_freq,
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ident = "LiteX SoC on Ztex 2.13",
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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.A7DDRPHY(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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self.add_sdram("sdram",
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phy = self.ddrphy,
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module = MT41J128M16(sys_clk_freq, "1:4"),
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l2_cache_size = kwargs.get("l2_size", 8192)
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)
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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 Ztex 2.13")
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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("--expansion", default="debug", help="Expansion board (debug or sbus).")
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target_group.add_argument("--sys-clk-freq", default=100e6, help="System clock frequency.")
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target_group.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.")
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target_group.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support.")
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builder_args(parser)
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soc_core_args(parser)
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vivado_build_args(parser)
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args = parser.parse_args()
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soc = BaseSoC(sys_clk_freq=int(float(args.sys_clk_freq)), expansion=args.expansion, **soc_core_argdict(args))
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assert not (args.with_spi_sdcard and args.with_sdcard)
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if args.with_spi_sdcard:
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soc.add_spi_sdcard() # SBus only
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if args.with_sdcard:
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soc.add_sdcard() # SBus only
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builder = Builder(soc, **builder_argdict(args))
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builder.build(**vivado_build_argdict(args), 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 __name__ == "__main__":
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main()
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