134 lines
5.2 KiB
Python
Executable File
134 lines
5.2 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 kcu105
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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 EDY4016A
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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):
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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_clk200 = 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 = USMMCM(speedgrade=-2)
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self.comb += main_pll.reset.eq(platform.request("cpu_reset"))
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main_pll.register_clkin(platform.request("clk125"), 125e6)
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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_clk200, 200e6, 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 = USMMCM(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_clk200, ~pll.locked),
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]
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self.submodules.idelayctrl = USIDELAYCTRL(cd_ref=self.cd_clk200, 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, sys_clk_freq=int(175e6)):
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platform = kcu105.Platform()
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, sys_clk_freq,
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integrated_rom_size = 0x8000,
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integrated_rom_mode = "rw",
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csr_data_width = 32,
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uart_name = "crossover")
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# CRG --------------------------------------------------------------------------------------
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self.submodules.crg = _CRG(platform, sys_clk_freq)
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self.add_csr("crg")
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# DDR4 SDRAM -------------------------------------------------------------------------------
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self.submodules.ddrphy = usddrphy.USDDRPHY(platform.request("ddram"),
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memtype = "DDR4",
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sys_clk_freq = sys_clk_freq,
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iodelay_clk_freq = 200e6)
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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 = EDY4016A(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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)
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# UARTBone ---------------------------------------------------------------------------------
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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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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 KCU105")
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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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parser.add_argument("--test", action="store_true", help="Run Test")
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args = parser.parse_args()
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soc = BenchSoC()
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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.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/kcu105/software/bios/bios.bin")
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if __name__ == "__main__":
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main()
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