#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2021 Hans Baier # SPDX-License-Identifier: BSD-2-Clause # https://www.aliexpress.com/item/1000006630084.html from migen import * from litex_boards.platforms import qmtech_xc7a35t from litex.build.xilinx.vivado import vivado_build_args, vivado_build_argdict 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.video import VideoVGAPHY from litex.soc.cores.led import LedChaser from litedram.modules import MT41J128M16 from litedram.phy import s7ddrphy from liteeth.phy.mii import LiteEthPHYMII # CRG ---------------------------------------------------------------------------------------------- class _CRG(Module): def __init__(self, platform, sys_clk_freq, with_ethernet, with_vga): self.rst = Signal() self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_sys4x = ClockDomain() self.clock_domains.cd_sys4x_dqs = ClockDomain() self.clock_domains.cd_idelay = ClockDomain() self.clock_domains.cd_eth = ClockDomain() if with_ethernet: self.clock_domains.cd_eth = ClockDomain() if with_vga: self.clock_domains.cd_vga = ClockDomain() # # # self.submodules.pll = pll = S7PLL(speedgrade=-1) try: reset_button = platform.request("cpu_reset") self.comb += pll.reset.eq(~reset_button | self.rst) except: self.comb += pll.reset.eq(self.rst) pll.register_clkin(platform.request("clk50"), 50e6) 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) pll.create_clkout(self.cd_idelay, 200e6) if with_ethernet: pll.create_clkout(self.cd_eth, 25e6) if with_vga: pll.create_clkout(self.cd_vga, 40e6) platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, toolchain="vivado", sys_clk_freq=int(100e6), with_daughterboard=False, with_ethernet=False, with_etherbone=False, eth_ip="192.168.1.50", eth_dynamic_ip=False, with_led_chaser=True, with_video_terminal=False, with_video_framebuffer=False, with_jtagbone=True, with_spi_flash=False, **kwargs): platform = qmtech_xc7a35t.Platform(toolchain=toolchain, with_daughterboard=with_daughterboard) # SoCCore ---------------------------------------------------------------------------------- if (kwargs["uart_name"] == "serial") and (not with_daughterboard): kwargs["uart_name"] = "gpio_serial" SoCCore.__init__(self, platform, sys_clk_freq, ident = "LiteX SoC on QMTech XC7A35T" + (" + Daughterboard" if with_daughterboard else ""), **kwargs) # CRG -------------------------------------------------------------------------------------- self.submodules.crg = _CRG(platform, sys_clk_freq, with_ethernet or with_etherbone, with_video_terminal or with_video_framebuffer) # DDR3 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.submodules.ddrphy = s7ddrphy.A7DDRPHY(platform.request("ddram"), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq) self.add_sdram("sdram", phy = self.ddrphy, module = MT41J128M16(sys_clk_freq, "1:4"), l2_cache_size = kwargs.get("l2_size", 8192) ) # Ethernet / Etherbone --------------------------------------------------------------------- if with_ethernet or with_etherbone: self.submodules.ethphy = LiteEthPHYMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth")) if with_ethernet: self.add_ethernet(phy=self.ethphy, dynamic_ip=eth_dynamic_ip) if with_etherbone: self.add_etherbone(phy=self.ethphy, ip_address=eth_ip) # The daughterboard has the tx clock wired to a non-clock pin, so we can't help it self.platform.add_platform_command("set_property CLOCK_DEDICATED_ROUTE FALSE [get_nets eth_clocks_tx_IBUF]") # Jtagbone --------------------------------------------------------------------------------- if with_jtagbone: self.add_jtagbone() # SPI Flash -------------------------------------------------------------------------------- if with_spi_flash: from litespi.modules import MT25QL128 from litespi.opcodes import SpiNorFlashOpCodes as Codes self.add_spi_flash(mode="4x", module=MT25QL128(Codes.READ_1_1_1), with_master=True) # Video ------------------------------------------------------------------------------------ if with_video_terminal or with_video_framebuffer: self.submodules.videophy = VideoVGAPHY(platform.request("vga"), clock_domain="vga") if with_video_terminal: self.add_video_terminal(phy=self.videophy, timings="800x600@60Hz", clock_domain="vga") if with_video_framebuffer: self.add_video_framebuffer(phy=self.videophy, timings="800x600@60Hz", clock_domain="vga") # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.submodules.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) if not with_daughterboard and kwargs["uart_name"] == "serial": kwargs["uart_name"] = "jtag_serial" # Build -------------------------------------------------------------------------------------------- def main(): from litex.soc.integration.soc import LiteXSoCArgumentParser parser = LiteXSoCArgumentParser(description="LiteX SoC on QMTech XC7A35T") target_group = parser.add_argument_group(title="Target options") target_group.add_argument("--toolchain", default="vivado", help="FPGA toolchain (vivado or symbiflow).") 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.") target_group.add_argument("--with-daughterboard", action="store_true", help="Board plugged into the QMTech daughterboard.") ethopts = target_group.add_mutually_exclusive_group() ethopts.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support.") ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.") target_group.add_argument("--eth-ip", default="192.168.1.50", type=str, help="Ethernet/Etherbone IP address.") target_group.add_argument("--eth-dynamic-ip", action="store_true", help="Enable dynamic Ethernet IP addresses setting.") sdopts = target_group.add_mutually_exclusive_group() sdopts.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.") sdopts.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support.") target_group.add_argument("--with-jtagbone", action="store_true", help="Enable Jtagbone support.") target_group.add_argument("--with-spi-flash", action="store_true", help="Enable SPI Flash (MMAPed).") viopts = target_group.add_mutually_exclusive_group() viopts.add_argument("--with-video-terminal", action="store_true", help="Enable Video Terminal (VGA).") viopts.add_argument("--with-video-framebuffer", action="store_true", help="Enable Video Framebuffer (VGA).") builder_args(parser) soc_core_args(parser) vivado_build_args(parser) args = parser.parse_args() soc = BaseSoC( toolchain = args.toolchain, sys_clk_freq = int(float(args.sys_clk_freq)), with_daughterboard = args.with_daughterboard, with_ethernet = args.with_ethernet, with_etherbone = args.with_etherbone, eth_ip = args.eth_ip, eth_dynamic_ip = args.eth_dynamic_ip, with_jtagbone = args.with_jtagbone, with_spi_flash = args.with_spi_flash, with_video_terminal = args.with_video_terminal, with_video_framebuffer = args.with_video_framebuffer, **soc_core_argdict(args) ) if args.with_spi_sdcard: soc.add_spi_sdcard() if args.with_sdcard: soc.add_sdcard() builder = Builder(soc, **builder_argdict(args)) builder_kwargs = vivado_build_argdict(args) if args.toolchain == "vivado" else {} builder.build(**builder_kwargs, run=args.build) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if __name__ == "__main__": main()