152 lines
6.4 KiB
Python
Executable File
152 lines
6.4 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# This file is part of LiteDRAM.
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#
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# Copyright (c) 2020 Florent Kermarrec <florent@enjoy-digital.fr>
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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 xcu1525
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from litex.soc.cores.clock import *
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from litex.soc.interconnect.csr 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 litedram.modules import MT40A512M8
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from litedram.phy import usddrphy
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# CRG ----------------------------------------------------------------------------------------------
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class _CRG(Module, AutoCSR):
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def __init__(self, platform, sys_clk_freq, ddram_channel):
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self.clock_domains.cd_sys_pll = ClockDomain()
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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_pll4x = ClockDomain(reset_less=True)
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self.clock_domains.cd_idelay = ClockDomain()
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self.clock_domains.cd_uart = ClockDomain()
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# # #
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self.submodules.main_pll = main_pll = USPMMCM(speedgrade=-2)
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main_pll.register_clkin(platform.request("clk300", ddram_channel), 300e6)
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main_pll.create_clkout(self.cd_sys_pll, sys_clk_freq)
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main_pll.create_clkout(self.cd_idelay, 500e6, with_reset=False)
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main_pll.create_clkout(self.cd_uart, 100e6)
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main_pll.expose_drp()
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self.submodules.pll = pll = USPMMCM(speedgrade=-2)
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self.comb += pll.reset.eq(~main_pll.locked)
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pll.register_clkin(self.cd_sys_pll.clk, sys_clk_freq)
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pll.create_clkout(self.cd_pll4x, sys_clk_freq*4, buf=None, with_reset=False)
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self.specials += [
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Instance("BUFGCE_DIV", name="main_bufgce_div",
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p_BUFGCE_DIVIDE=4,
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i_CE=1, i_I=self.cd_pll4x.clk, o_O=self.cd_sys.clk),
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Instance("BUFGCE", name="main_bufgce",
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i_CE=1, i_I=self.cd_pll4x.clk, o_O=self.cd_sys4x.clk),
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AsyncResetSynchronizer(self.cd_idelay, ~pll.locked),
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]
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self.submodules.idelayctrl = USIDELAYCTRL(cd_ref=self.cd_idelay, cd_sys=self.cd_sys)
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sys_clk_counter = Signal(32)
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self.sync += sys_clk_counter.eq(sys_clk_counter + 1)
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self.sys_clk_counter = CSRStatus(32)
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self.comb += self.sys_clk_counter.status.eq(sys_clk_counter)
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# Bench SoC ----------------------------------------------------------------------------------------
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class BenchSoC(SoCCore):
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def __init__(self, uart="crossover", sys_clk_freq=int(125e6), ddram_channel=0, with_bist=False):
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platform = xcu1525.Platform()
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, clk_freq=sys_clk_freq,
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integrated_rom_size = 0x10000,
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integrated_rom_mode = "rw",
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csr_data_width = 32,
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uart_name = uart)
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# CRG --------------------------------------------------------------------------------------
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self.submodules.crg = _CRG(platform, sys_clk_freq, ddram_channel)
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self.add_csr("crg")
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# DDR4 SDRAM -------------------------------------------------------------------------------
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self.submodules.ddrphy = usddrphy.USPDDRPHY(platform.request("ddram", ddram_channel),
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memtype = "DDR4",
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sys_clk_freq = sys_clk_freq,
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iodelay_clk_freq = 500e6)
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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 = MT40A512M8(sys_clk_freq, "1:4"),
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origin = self.mem_map["main_ram"],
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size = 0x40000000,
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with_bist = with_bist,
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)
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# Workadound for Vivado 2018.2 DRC, can be ignored and probably fixed on newer Vivado versions.
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platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks PDCN-2736]")
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# UARTBone ---------------------------------------------------------------------------------
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if uart != "serial":
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self.add_uartbone(name="serial", clk_freq=100e6, baudrate=115200, cd="uart")
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# Leds -------------------------------------------------------------------------------------
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from litex.soc.cores.led import LedChaser
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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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self.add_csr("leds")
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# Main ---------------------------------------------------------------------------------------------
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def main():
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parser = argparse.ArgumentParser(description="LiteDRAM Bench on XCU1525")
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parser.add_argument("--uart", default="crossover", help="Selected UART: crossover (default) or serial")
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parser.add_argument("--build", action="store_true", help="Build bitstream")
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parser.add_argument("--ddram-channel", default="0", help="DDRAM channel")
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parser.add_argument("--with-bist", action="store_true", help="Add BIST Generator/Checker")
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parser.add_argument("--load", action="store_true", help="Load bitstream")
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parser.add_argument("--load-bios", action="store_true", help="Load BIOS")
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parser.add_argument("--set-sys-clk", default=None, help="Set sys_clk")
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parser.add_argument("--test", action="store_true", help="Run Full Bench")
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args = parser.parse_args()
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soc = BenchSoC(uart=args.uart, ddram_channel=int(args.ddram_channel, 0), with_bist=args.with_bist)
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builder = Builder(soc, csr_csv="csr.csv")
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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 args.load_bios:
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from common import us_load_bios
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us_load_bios("build/xcu1525/software/bios/bios.bin")
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if args.set_sys_clk is not None:
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from common import us_set_sys_clk
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us_set_sys_clk(clk_freq=float(args.config), vco_freq=soc.crg.main_pll.compute_config()["vco"])
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if args.test:
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from common import us_bench_test
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us_bench_test(
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freq_min = 80e6,
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freq_max = 180e6,
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freq_step = 1e6,
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vco_freq = soc.crg.pll.compute_config()["vco"],
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bios_filename = "build/xcu1525/software/bios/bios.bin")
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if __name__ == "__main__":
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main()
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