#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2021 Nathaniel Lewis # Copyright (c) 2023 Hans Baier # SPDX-License-Identifier: BSD-2-Clause from migen import * from litex.gen import * from litex.build.io import DDROutput from litex_boards.platforms import aliexpress_xc7k70t from litex.soc.interconnect.csr import * from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.cores.clock import * from litex.soc.cores.video import VideoS7HDMIPHY from litex.soc.cores.led import LedChaser from litedram.modules import W9812G6JB, SDRModule from litedram.phy import GENSDRPHY, HalfRateGENSDRPHY # CRG ---------------------------------------------------------------------------------------------- class CRG(LiteXModule): def __init__(self, platform, sys_clk_freq, sdram_rate="1:1"): self.rst = Signal() self.cd_sys = ClockDomain() self.cd_hdmi = ClockDomain() self.cd_hdmi5x = ClockDomain() if sdram_rate == "1:2": self.cd_sys2x = ClockDomain() self.cd_sys2x_ps = ClockDomain() else: self.cd_sys_ps = ClockDomain() # Clk/Rst clk50 = platform.request("clk50") # PLL self.pll = pll = S7PLL() self.comb += pll.reset.eq(self.rst) pll.register_clkin(clk50, 50e6) pll.create_clkout(self.cd_sys, sys_clk_freq) pll.create_clkout(self.cd_hdmi, 25e6, margin=0) pll.create_clkout(self.cd_hdmi5x, 125e6, margin=0) if sdram_rate == "1:2": pll.create_clkout(self.cd_sys2x, 2*sys_clk_freq) pll.create_clkout(self.cd_sys2x_ps, 2*sys_clk_freq, phase=90) else: pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=90) # BaseSoC ----------------------------------------------------------------------------------------- class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=100e6, sdram_rate="1:1", with_hdmi = False, with_ethernet = False, with_pcie = False, with_sdram = True, with_led_chaser = True, with_video_terminal = False, with_video_framebuffer = False, with_video_colorbars = False, **kwargs): platform = aliexpress_xc7k70t.Platform() # CRG -------------------------------------------------------------------------------------- self.crg = CRG(platform, sys_clk_freq, sdram_rate) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Alchitry Mojo", **kwargs) # Add SDRAM if a shield with RAM has been added if not self.integrated_main_ram_size: sdram_clk = ClockSignal("sys2x_ps" if sdram_rate == "1:2" else "sys_ps") self.crg.specials += DDROutput(1, 0, platform.request("sdram_clock"), sdram_clk) sdrphy_cls = HalfRateGENSDRPHY if sdram_rate == "1:2" else GENSDRPHY self.sdrphy = sdrphy_cls(platform.request("sdram"), sys_clk_freq) self.add_sdram("sdram", phy = self.sdrphy, module = W9812G6JB(sys_clk_freq, sdram_rate), l2_cache_size = kwargs.get("l2_size", 1 * KILOBYTE) ) # HDMI Options ----------------------------------------------------------------------------- if with_hdmi and (with_video_colorbars or with_video_framebuffer or with_video_terminal): self.videophy = VideoS7HDMIPHY(platform.request("hdmi_out"), clock_domain="hdmi") if with_video_colorbars: self.add_video_colorbars(phy=self.videophy, timings="640x480@60Hz", clock_domain="hdmi") if with_video_terminal: self.add_video_terminal(phy=self.videophy, timings="640x480@60Hz", clock_domain="hdmi") if with_video_framebuffer: self.add_video_framebuffer(phy=self.videophy, timings="640x480@60Hz", clock_domain="hdmi") # Ethernet / Etherbone --------------------------------------------------------------------- if with_ethernet: self.ethphy = LiteEthPHYRGMII( clock_pads = self.platform.request("eth_clocks", 0), pads = self.platform.request("eth", 0), tx_delay = 1.417e-9, rx_delay = 1.417e-9, ) self.add_ethernet(phy=self.ethphy) # PCIe ------------------------------------------------------------------------------------- if with_pcie: self.pcie_phy = S7PCIEPHY(platform, platform.request("pcie_x4"), data_width = 128, bar0_size = 0x20000) self.add_pcie(phy=self.pcie_phy, ndmas=1) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=aliexpress_xc7k70t.Platform, description="LiteX SoC on AliExpress XC7K70T PCIe board.") parser.add_target_argument("--sys-clk-freq", default=90e6, type=float, help="System clock frequency.") parser.add_target_argument("--sdram-rate", default="1:1", help="SDRAM Rate: (1:1 Full Rate or 1:2 Half Rate).") parser.add_argument("--with-ethernet", action="store_true", help="Enable ethernet") parser.add_argument("--with-pcie", action="store_true", help="Enable PCIe") parser.add_argument("--with-hdmi", action="store_true", help="Enable HDMI") viopts = parser.target_group.add_mutually_exclusive_group() viopts.add_argument("--with-video-terminal", action="store_true", help="Enable Video Terminal (HDMI).") viopts.add_argument("--with-video-framebuffer", action="store_true", help="Enable Video Framebuffer (HDMI).") viopts.add_argument("--with-video-colorbars", action="store_true", help="Enable Video Colorbars (HDMI).") args = parser.parse_args() # Note: baudrate is fixed because regardless of USB->TTL baud, the AVR <-> FPGA baudrate is # set to a fixed rate of 500 kilobaud. soc = BaseSoC( sys_clk_freq = args.sys_clk_freq, sdram_rate = args.sdram_rate, with_ethernet = args.with_ethernet, with_pcie = args.with_pcie, with_hdmi = args.with_hdmi, with_video_terminal = args.with_video_terminal, with_video_framebuffer = args.with_video_framebuffer, with_video_colorbars = args.with_video_colorbars, **parser.soc_argdict ) builder = Builder(soc, **parser.builder_argdict) if args.build: builder.build(**parser.toolchain_argdict) if __name__ == "__main__": main()