#!/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 from liteeth.phy.mii import LiteEthPHYMII # 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_eth = 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, 100e6) main_pll.create_clkout(self.cd_clk200, 200e6) 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) 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, 100e6) 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(100e6)): platform = arty.Platform() # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, clk_freq=sys_clk_freq, integrated_rom_size = 0x8000, 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"] ) # Etherbone -------------------------------------------------------------------------------- self.submodules.ethphy = LiteEthPHYMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth"), with_hw_init_reset = False) self.add_csr("ethphy") self.add_etherbone(phy=self.ethphy) # Leds ------------------------------------------------------------------------------------- from litex.soc.cores.led import LedChaser self.submodules.led = LedChaser(self.platform.request_all("user_led"), sys_clk_freq) self.add_csr("led") # Bench Test --------------------------------------------------------------------------------------- def bench_test(): import time from litex import RemoteClient wb = RemoteClient() wb.open() # # # class ClkReg1: def __init__(self, value=0): self.unpack(value) def unpack(self, value): self.low_time = (value >> 0) & (2**6 - 1) self.high_time = (value >> 6) & (2**6 - 1) self.reserved = (value >> 12) & (2**1 - 1) self.phase_mux = (value >> 13) & (2**3 - 1) def pack(self): value = (self.low_time << 0) value |= (self.high_time << 6) value |= (self.reserved << 12) value |= (self.phase_mux << 13) return value def __repr__(self): s = "ClkReg1:\n" s += " low_time: {:d}\n".format(self.low_time) s += " high_time: {:d}\n".format(self.high_time) s += " reserved: {:d}\n".format(self.reserved) s += " phase_mux: {:d}".format(self.phase_mux) return s class ClkReg2: def __init__(self, value = 0): self.unpack(value) def unpack(self, value): self.delay_time = (value >> 0) & (2**6 - 1) self.no_count = (value >> 6) & (2**1 - 1) self.edge = (value >> 7) & (2**1 - 1) self.mx = (value >> 8) & (2**2 - 1) self.frac_wf_r = (value >> 10) & (2**1 - 1) self.frac_en = (value >> 11) & (2**1 - 1) self.frac = (value >> 12) & (2**3 - 1) self.reserved = (value >> 15) & (2**1 - 1) def pack(self): value = (self.delay_time << 0) value |= (self.no_count << 6) value |= (self.edge << 7) value |= (self.mx << 8) value |= (self.frac_wf_r << 10) value |= (self.frac_en << 11) value |= (self.frac << 12) value |= (self.reserved << 15) return value def __repr__(self): s = "ClkReg2:\n" s += " delay_time: {:d}\n".format(self.delay_time) s += " no_count: {:d}\n".format(self.no_count) s += " edge: {:d}\n".format(self.edge) s += " mx: {:d}\n".format(self.mx) s += " frac_wf_r: {:d}\n".format(self.frac_wf_r) s += " frac_en: {:d}\n".format(self.frac_en) s += " frac: {:d}\n".format(self.frac) s += " reserved: {:d}".format(self.reserved) return s class S7PLL: def reset(self): wb.regs.crg_main_pll_drp_reset.write(1) def read(self, adr): wb.regs.crg_main_pll_drp_adr.write(adr) wb.regs.crg_main_pll_drp_read.write(1) return wb.regs.crg_main_pll_drp_dat_r.read() def write(self, adr, value): wb.regs.crg_main_pll_drp_adr.write(adr) wb.regs.crg_main_pll_drp_dat_w.write(value) wb.regs.crg_main_pll_drp_write.write(1) # # # vco_freq = 1.6e9 s7pll = S7PLL() print("Dump Main PLL...") clkout0_clkreg1 = ClkReg1(s7pll.read(0x08)) print(clkout0_clkreg1) for i in range(12, 44, 2): sys_clk_freq = vco_freq/i print("Reconfig Main PLL to {}MHz...".format(sys_clk_freq/1e6)) clkout0_clkreg1.high_time = i//2 + i%2 clkout0_clkreg1.low_time = i//2 s7pll.write(0x08, clkout0_clkreg1.pack()) print("Measuring sys_clk...") duration = 5e-1 start = wb.regs.crg_sys_clk_counter.read() time.sleep(duration) end = wb.regs.crg_sys_clk_counter.read() print("sys_clk: {:3.2f}MHz".format((end-start)/(1e6*duration))) print("Reset SoC and get BIOS log...") wb.regs.ctrl_reset.write(1) start = time.time() while (time.time() - start) < 5: if wb.regs.uart_xover_rxempty.read() == 0: print("{:c}".format(wb.regs.uart_xover_rxtx.read()), end="") # # # wb.close() # 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() if args.build or args.load: 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: bench_test() if __name__ == "__main__": main()