#!/usr/bin/env python3 # # This file is part of LiteDRAM. # # Copyright (c) 2020 Florent Kermarrec # SPDX-License-Identifier: BSD-2-Clause import os import argparse from migen import * from litex_boards.platforms import digilent_arty from litex.soc.cores.clock import * from litex.soc.interconnect.csr import * from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litedram.common import PHYPadsReducer from litedram.phy import s7ddrphy from litedram.modules import MT41K128M16 from liteeth.phy.mii import LiteEthPHYMII # CRG ---------------------------------------------------------------------------------------------- class _CRG(Module, AutoCSR): def __init__(self, platform, sys_clk_freq): self.rst = Signal() self.clock_domains.cd_sys_pll = ClockDomain() self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_sys4x = ClockDomain(reset_less=True) self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True) self.clock_domains.cd_clk200 = ClockDomain() self.clock_domains.cd_uart = ClockDomain() self.clock_domains.cd_eth = ClockDomain() # # # # Main PLL. self.submodules.main_pll = main_pll = S7PLL(speedgrade=-1) self.comb += main_pll.reset.eq(~platform.request("cpu_reset")) main_pll.register_clkin(platform.request("clk100"), 100e6) main_pll.create_clkout(self.cd_sys_pll, sys_clk_freq) main_pll.create_clkout(self.cd_clk200, 200e6) main_pll.create_clkout(self.cd_uart, 100e6) main_pll.create_clkout(self.cd_eth, 25e6) main_pll.expose_drp() self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_clk200) self.comb += platform.request("eth_ref_clk").eq(self.cd_eth.clk) # DRAM PLL. self.submodules.pll = pll = S7PLL(speedgrade=-1) self.comb += pll.reset.eq(~main_pll.locked | self.rst) pll.register_clkin(self.cd_sys_pll.clk, sys_clk_freq) pll.create_clkout(self.cd_sys, sys_clk_freq) pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq) pll.create_clkout(self.cd_sys4x_dqs, 4*sys_clk_freq, phase=90) # Sys Clk Counter. self.sys_clk_counter = CSRStatus(32) self.sync += self.sys_clk_counter.status.eq(self.sys_clk_counter.status + 1) # Bench SoC ---------------------------------------------------------------------------------------- class BenchSoC(SoCCore): def __init__(self, uart="crossover", sys_clk_freq=int(125e6), with_bist=False, with_analyzer=False): platform = digilent_arty.Platform() # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, clk_freq=sys_clk_freq, ident = "LiteDRAM bench on Arty", integrated_rom_size = 0x10000, integrated_rom_mode = "rw", uart_name = uart) # CRG -------------------------------------------------------------------------------------- self.submodules.crg = _CRG(platform, sys_clk_freq) # DDR3 SDRAM ------------------------------------------------------------------------------- self.submodules.ddrphy = s7ddrphy.A7DDRPHY( pads = PHYPadsReducer(platform.request("ddram"), [0, 1]), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq) self.add_sdram("sdram", phy = self.ddrphy, module = MT41K128M16(sys_clk_freq, "1:4"), origin = self.mem_map["main_ram"], with_bist = with_bist) # UARTBone --------------------------------------------------------------------------------- if uart != "serial": self.add_uartbone(clk_freq=100e6, baudrate=115200, cd="uart") # Etherbone -------------------------------------------------------------------------------- self.submodules.ethphy = LiteEthPHYMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth"), with_hw_init_reset = False) self.add_etherbone(phy=self.ethphy) # Analyzer --------------------------------------------------------------------------------- if with_analyzer: from litescope import LiteScopeAnalyzer analyzer_signals = [self.ddrphy.dfi] self.submodules.analyzer = LiteScopeAnalyzer(analyzer_signals, depth = 256, clock_domain = "sys", csr_csv = "analyzer.csv") # Leds ------------------------------------------------------------------------------------- from litex.soc.cores.led import LedChaser self.submodules.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # Main --------------------------------------------------------------------------------------------- def main(): parser = argparse.ArgumentParser(description="LiteDRAM Bench on Arty A7") parser.add_argument("--uart", default="crossover", help="Selected UART: crossover (default) or serial") parser.add_argument("--build", action="store_true", help="Build bitstream") parser.add_argument("--with-bist", action="store_true", help="Add BIST Generator/Checker") parser.add_argument("--with-analyzer", action="store_true", help="Add Analyzer") parser.add_argument("--load", action="store_true", help="Load bitstream") parser.add_argument("--load-bios", action="store_true", help="Load BIOS") parser.add_argument("--sys-clk-freq", default=None, help="Set sys_clk_freq") parser.add_argument("--test", action="store_true", help="Run Full Bench") args = parser.parse_args() soc = BenchSoC(uart=args.uart, with_bist=args.with_bist, with_analyzer=args.with_analyzer) builder = Builder(soc, csr_csv="csr.csv") builder.build(run=args.build) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(os.path.join(builder.gateware_dir, soc.build_name + ".bit")) if args.load_bios: from common import load_bios load_bios("build/digilent_arty/software/bios/bios.bin") if args.sys_clk_freq is not None: from common import s7_set_sys_clk s7_set_sys_clk(clk_freq=float(args.sys_clk_freq), vco_freq=soc.crg.main_pll.compute_config()["vco"]) if args.test: from common import s7_bench_test s7_bench_test( freq_min = 60e6, freq_max = 150e6, freq_step = 1e6, vco_freq = soc.crg.main_pll.compute_config()["vco"], bios_filename = "build/digilent_arty/software/bios/bios.bin") if __name__ == "__main__": main()