diff --git a/litex_boards/platforms/u420t.py b/litex_boards/platforms/u420t.py new file mode 100644 index 0000000..b36ad1f --- /dev/null +++ b/litex_boards/platforms/u420t.py @@ -0,0 +1,85 @@ +# +# This file is part of LiteX-Boards. +# +# Copyright (c) 2018-2019 Florent Kermarrec +# SPDX-License-Identifier: BSD-2-Clause +# Kintex7-420T +# Part xc7k420tiffg901-2L +# ported by Alex Petrov aka sysman + +from litex.build.generic_platform import * +from litex.build.xilinx import XilinxPlatform, VivadoProgrammer +from litex.build.openocd import OpenOCD + +# IOs ---------------------------------------------------------------------------------------------- + +_io = [ + # Clk / Rst + # u420t clk_y1 G27/ clk_y3 E25 + ("clk100", 0, Pins("G27"), IOStandard("LVCMOS33")), + #("sysclk", 0, Pins("E25"), IOStandard("LVCMOS33")), + #("clk100", 0, + # Subsignal("p", Pins("AB27"), IOStandard("DIFF_SSTL15")), + # Subsignal("n", Pins("AA27"), IOStandard("DIFF_SSTL15")) + #), + ("cpu_reset", 0, Pins("W12"), IOStandard("LVCMOS33")), + + # Leds board: D3-D10 + ("user_led", 0, Pins("AJ22"), IOStandard("LVCMOS33")), + ("user_led", 1, Pins("AJ21"), IOStandard("LVCMOS33")), + ("user_led", 2, Pins("AK21"), IOStandard("LVCMOS33")), + ("user_led", 3, Pins("AK20"), IOStandard("LVCMOS33")), + ("user_led", 4, Pins("AK19"), IOStandard("LVCMOS33")), + ("user_led", 5, Pins("AJ19"), IOStandard("LVCMOS33")), + ("user_led", 6, Pins("AK18"), IOStandard("LVCMOS33")), + ("user_led", 7, Pins("AJ18"), IOStandard("LVCMOS33")), + + # Buttons + ("user_btn_k3", 0, Pins("AK15"), IOStandard("LVCMOS33")), + ("user_btn_k2", 0, Pins("AK16"), IOStandard("LVCMOS33")), + # ("user_btnb", 0, Pins("AB11"), IOStandard("LVCMOS33")), + + # http://www.wch-ic.com/products/CH340.html + # Serial CH340 , warning: wrong schema + ("serial", 0, + Subsignal("tx", Pins("AK23")), ## U340 schem rx + Subsignal("rx", Pins("AJ23")), ## U340 schem tx + IOStandard("LVCMOS33") + ), + + # SPIFlash (Micron N25Q256A / mt25ql256 (32MB)) + #("spiflash4x", 0, + # Subsignal("cs_n", Pins("V26")), + #Subsignal("clk", Pins("")), # driven through JTAG H13 #T22 ? + # Subsignal("dq", Pins("R30","T30","R28","T28")), + # IOStandard("LVCMOS33"), + #), + + +] + +# Connectors --------------------------------------------------------------------------------------- +# to add connector +_connectors = [] + +# PMODS -------------------------------------------------------------------------------------------- + + +# Platform ----------------------------------------------------------------------------------------- + +class Platform(XilinxPlatform): + default_clk_name = "clk100" + default_clk_period = 1e9/100e6 + + def __init__(self, toolchain="vivado"): + XilinxPlatform.__init__(self, "xc7k420tl-ffg901", _io, toolchain=toolchain) +# self.add_platform_command("") +# self.add_platform_command("set_property INTERNAL_VREF 0.900 [current_design]") +# self.add_platform_command("set_property INTERNAL_VREF 0.900 [get_iobanks 34]") + + def create_programmer(self): + return OpenOCD("openocd_xc7_ft2232.cfg", "bscan_spi_xc7a420t.bit") + + def do_finalize(self, fragment): + XilinxPlatform.do_finalize(self, fragment) + self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6) diff --git a/litex_boards/targets/u420t.py b/litex_boards/targets/u420t.py new file mode 100755 index 0000000..e72ffda --- /dev/null +++ b/litex_boards/targets/u420t.py @@ -0,0 +1,124 @@ +#!/usr/bin/env python3 + +# +# This file is part of LiteX-Boards. +# +# Copyright (c) 2020-2021 Xuanyu Hu +# SPDX-License-Identifier: BSD-2-Clause +# ported by Alex Petrov aka sysman +# Kintex7-420T +# Part xc7k420tiffg901-2L + +from migen import * + +from litex_boards.platforms import u420t +from litex.soc.interconnect import wishbone +from litex.soc.cores.clock import * +#from litex.soc.integration.soc import SoCRegion +from litex.soc.integration.soc_core import * +from litex.soc.integration.builder import * +from litex.soc.cores.led import LedChaser + +# CRG ---------------------------------------------------------------------------------------------- + +class _CRG(Module): + def __init__(self, platform, sys_clk_freq): + self.rst = Signal() + self.clock_domains.cd_sys = ClockDomain() + self.clock_domains.cd_sys4x = ClockDomain(reset_less=True) + self.clock_domains.cd_idelay = ClockDomain() + + # # # + #clk100 = platform.request("clk100") + + # board is grade 2, but to fix halts use -1 + self.submodules.pll = pll = S7MMCM(speedgrade=-2) + ##self.submodules.pll = pll = S7MMCM(speedgrade=-1) + #self.comb += pll.reset.eq(~platform.request("cpu_reset_n") | self.rst) + self.comb += pll.reset.eq(platform.request("user_btn_k3") | self.rst) + pll.register_clkin(platform.request("clk100"), 100e6) + #workaround to bypass for clk100 error: No nets matched 'clk100' + #line:940 litex/litex/build/xilinx/vivado.py " [get_ports {clk}]", clk=clk) + ## platform.add_platform_command("create_clock -name clk100 -period 10.0 [get_ports clk100]") + pll.create_clkout(self.cd_sys, sys_clk_freq) + pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq) + pll.create_clkout(self.cd_idelay, 200e6) + platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. + # platform.add_platform_command("set_property CLOCK_DEDICATED_ROUTE FALSE [get_nets clk100]") + # Reduce programming time + #self.add_platform_command("set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]") + self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay) + +# BaseSoC ------------------------------------------------------------------------------------------ + +class BaseSoC(SoCCore): + def __init__(self, sys_clk_freq=int(100e6), with_led_chaser=True, **kwargs): + platform = u420t.Platform() + + # --- add more sram for riscv comfort + kwargs["integrated_rom_size"] = 0x8000 # 8kb + kwargs["integrated_sram_size"] = 0x10000 # 64kb + kwargs["integrated_main_ram_size"] = 0x20000 # 128kb + + # SoCCore ----------------------------------_----------------------------------------------- + SoCCore.__init__(self, platform, sys_clk_freq, + ident = "LiteX SoC on u420t", + **kwargs) + + # CRG -------------------------------------------------------------------------------------- + self.submodules.crg = _CRG(platform, sys_clk_freq) + + # Video ------------------------------------------------------------------------------------ + # no video + # no ram + # SPI Flash -------------------------------------------------------------------------------- + #if with_spi_flash: + # from litespi.modules import W25Q256 + # from litespi.opcodes import SpiNorFlashOpCodes as Codes + # self.add_spi_flash(mode="1x", module=W25Q256(Codes.READ_1_1_1)) + + + # Leds ------------------------------------------------------------------------------------- + if with_led_chaser: + self.submodules.leds = LedChaser( + pads = platform.request_all("user_led"), + sys_clk_freq = sys_clk_freq) + + # Add ROM linker region -------------------------------------------------------------------- + #self.bus.add_region("rom", SoCRegion( + # origin = self.bus.regions["spiflash"].origin + bios_flash_offset, + # size = 32*kB, + # linker = True) + #) + #self.cpu.set_reset_address(self.bus.regions["rom"].origin) + + +# Build -------------------------------------------------------------------------------------------- +def main(): + from litex.soc.integration.soc import LiteXSoCArgumentParser + parser = LiteXSoCArgumentParser(description="LiteX SoC on u420t") + target_group = parser.add_argument_group(title="Target options") + target_group.add_argument("--build", action="store_true", help="Build bitstream.") + target_group.add_argument("--load", action="store_true", help="Load bitstream.") + target_group.add_argument("--sys-clk-freq", default=100e6, help="System clock frequency.") +# sdopts = target_group.add_mutually_exclusive_group() +# sdopts.add_argument("--with-spi-flash", action="store_true", help="Enable SPI-mode flash support.") + builder_args(parser) + soc_core_args(parser) + args = parser.parse_args() + + soc = BaseSoC( + sys_clk_freq = int(float(args.sys_clk_freq)), +# with_video_terminal = args.with_video_terminal, + **soc_core_argdict(args) + ) +# soc.platform.add_extension(u420t._sdcard_pmod_io) + builder = Builder(soc, **builder_argdict(args)) + builder.build(run=args.build) + + if args.load: + prog = soc.platform.create_programmer() + prog.load_bitstream(obuilder.get_bitstream_filename(mode="sram")) + +if __name__ == "__main__": + main()