124 lines
4.7 KiB
Python
Executable File
124 lines
4.7 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 kc705
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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.phy import s7ddrphy
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from litedram.modules import MT8JTF12864
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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_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 = S7PLL(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("clk200"), 200e6)
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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)
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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.idelayctrl = S7IDELAYCTRL(self.cd_clk200)
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self.submodules.pll = pll = S7PLL(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_sys, sys_clk_freq)
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pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq)
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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 = kc705.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 = 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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# DDR3 SDRAM -------------------------------------------------------------------------------
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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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self.add_csr("ddrphy")
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self.add_sdram("sdram",
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phy = self.ddrphy,
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module = MT8JTF12864(sys_clk_freq, "1:4"),
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origin = self.mem_map["main_ram"]
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)
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# UARTBone ---------------------------------------------------------------------------------
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self.add_uartbone(name="serial", clk_freq=100e6, baudrate=500e3, 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 KC705")
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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 s7_bench_test
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s7_bench_test(
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freq_min = 60e6,
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freq_max = 180e6,
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freq_step = 1e6,
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vco_freq = soc.crg.main_pll.compute_config()["vco"],
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bios_filename = "build/kc705/software/bios/bios.bin")
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if __name__ == "__main__":
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main()
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