#!/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 arty from litex.soc.cores.clock import * from litex.soc.interconnect.csr import * from litex.soc.integration.soc_core import * from litex.soc.integration.soc_sdram import * from litex.soc.integration.builder import * from litedram.phy import s7ddrphy from litedram.modules import MT41K128M16 # CRG ---------------------------------------------------------------------------------------------- class _CRG(Module, AutoCSR): def __init__(self, platform, sys_clk_freq): 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.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.expose_drp() self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_clk200) sys_clk_counter = Signal(32) self.sync += sys_clk_counter.eq(sys_clk_counter + 1) self.sys_clk_counter = CSRStatus(32) self.comb += self.sys_clk_counter.status.eq(sys_clk_counter) self.submodules.pll = pll = S7PLL(speedgrade=-1) self.comb += pll.reset.eq(~main_pll.locked) 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) # Bench SoC ---------------------------------------------------------------------------------------- class BenchSoC(SoCCore): def __init__(self, sys_clk_freq=int(150e6)): platform = arty.Platform() # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, clk_freq=sys_clk_freq, integrated_rom_size = 0x8000, integrated_rom_mode = "rw", csr_data_width = 32, uart_name = "crossover") # CRG -------------------------------------------------------------------------------------- self.submodules.crg = _CRG(platform, sys_clk_freq) self.add_csr("crg") # DDR3 SDRAM ------------------------------------------------------------------------------- self.submodules.ddrphy = s7ddrphy.A7DDRPHY(platform.request("ddram"), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq) self.add_csr("ddrphy") self.add_sdram("sdram", phy = self.ddrphy, module = MT41K128M16(sys_clk_freq, "1:4"), origin = self.mem_map["main_ram"] ) # UARTBone --------------------------------------------------------------------------------- self.add_uartbone(name="serial", clk_freq=100e6, baudrate=1e6, cd="uart") # Leds ------------------------------------------------------------------------------------- from litex.soc.cores.led import LedChaser self.submodules.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) self.add_csr("leds") # Main --------------------------------------------------------------------------------------------- def main(): parser = argparse.ArgumentParser(description="LiteDRAM Bench on Arty A7") parser.add_argument("--build", action="store_true", help="Build bitstream") parser.add_argument("--load", action="store_true", help="Load bitstream") parser.add_argument("--test", action="store_true", help="Run Test") args = parser.parse_args() soc = BenchSoC() 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.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/arty/software/bios/bios.bin", bios_timeout = 10, ) if __name__ == "__main__": main()