#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2021 Lucas Teske # SPDX-License-Identifier: BSD-2-Clause from migen import * from litex.build.io import DDROutput from litex_boards.platforms import muselab_icesugar_pro from litex.build.lattice.trellis import trellis_args, trellis_argdict from litex.soc.cores.clock import * from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.cores.video import VideoHDMIPHY from litex.soc.cores.led import LedChaser from litex.soc.interconnect.csr import * from litedram.modules import IS42S16160 from litedram.phy import GENSDRPHY, HalfRateGENSDRPHY from liteeth.phy.ecp5rgmii import LiteEthPHYRGMII # CRG ---------------------------------------------------------------------------------------------- class _CRG(Module): def __init__(self, platform, sys_clk_freq, use_internal_osc=False, with_video_pll=False, sdram_rate="1:1"): self.rst = Signal() self.clock_domains.cd_sys = ClockDomain() if sdram_rate == "1:2": self.clock_domains.cd_sys2x = ClockDomain() self.clock_domains.cd_sys2x_ps = ClockDomain() else: self.clock_domains.cd_sys_ps = ClockDomain() # # # # Clk / Rst if not use_internal_osc: clk = platform.request("clk25") clk_freq = 25e6 else: clk = Signal() div = 5 self.specials += Instance("OSCG", p_DIV = div, o_OSC = clk ) clk_freq = 310e6/div rst_n = platform.request("cpu_reset_n") # PLL self.submodules.pll = pll = ECP5PLL() self.comb += pll.reset.eq(~rst_n | self.rst) pll.register_clkin(clk, clk_freq) pll.create_clkout(self.cd_sys, sys_clk_freq) 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=180) # Idealy 90° but needs to be increased. else: pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=180) # Idealy 90° but needs to be increased. # Video PLL if with_video_pll: self.submodules.video_pll = video_pll = ECP5PLL() self.comb += video_pll.reset.eq(~rst_n | self.rst) video_pll.register_clkin(clk, clk_freq) self.clock_domains.cd_hdmi = ClockDomain() self.clock_domains.cd_hdmi5x = ClockDomain() video_pll.create_clkout(self.cd_hdmi, 25e6, margin=0) video_pll.create_clkout(self.cd_hdmi5x, 125e6, margin=0) # SDRAM clock sdram_clk = ClockSignal("sys2x_ps" if sdram_rate == "1:2" else "sys_ps") self.specials += DDROutput(1, 0, platform.request("sdram_clock"), sdram_clk) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=50e6, with_led_chaser=True, with_spi_flash=False, use_internal_osc=False, sdram_rate="1:1", with_video_terminal=False, with_video_framebuffer=False, **kwargs): platform = muselab_icesugar_pro.Platform() # CRG -------------------------------------------------------------------------------------- with_video_pll = with_video_terminal or with_video_framebuffer self.submodules.crg = _CRG(platform, sys_clk_freq, use_internal_osc=use_internal_osc, with_video_pll=with_video_pll, sdram_rate=sdram_rate) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, int(sys_clk_freq), ident="LiteX SoC on Muselab iCESugar Pro", **kwargs) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: ledn = platform.request_all("user_led_n") self.submodules.leds = LedChaser(pads=ledn, sys_clk_freq=sys_clk_freq) # 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)) # SDR SDRAM -------------------------------------------------------------------------------- if not self.integrated_main_ram_size: sdrphy_cls = HalfRateGENSDRPHY if sdram_rate == "1:2" else GENSDRPHY self.submodules.sdrphy = sdrphy_cls(platform.request("sdram")) self.add_sdram("sdram", phy = self.sdrphy, module = IS42S16160(sys_clk_freq, sdram_rate), l2_cache_size = kwargs.get("l2_size", 8192) ) # Video ------------------------------------------------------------------------------------ if with_video_terminal or with_video_framebuffer: self.submodules.videophy = VideoHDMIPHY(platform.request("gpdi"), 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") # Build -------------------------------------------------------------------------------------------- def main(): from litex.soc.integration.soc import LiteXSoCArgumentParser parser = LiteXSoCArgumentParser(description="LiteX SoC on Colorlight i5") target_group = parser.add_argument_group(title="Target options") target_group.add_argument("--build", action="store_true", help="Build design.") target_group.add_argument("--load", action="store_true", help="Load bitstream.") target_group.add_argument("--sys-clk-freq", default=50e6, help="System clock frequency.") 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-spi-flash", action="store_true", help="Enable SPI Flash (MMAPed).") target_group.add_argument("--use-internal-osc", action="store_true", help="Use internal oscillator.") target_group.add_argument("--sdram-rate", default="1:1", help="SDRAM Rate (1:1 Full Rate or 1:2 Half Rate).") viopts = 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).") builder_args(parser) soc_core_args(parser) trellis_args(parser) args = parser.parse_args() soc = BaseSoC( sys_clk_freq = int(float(args.sys_clk_freq)), use_internal_osc = args.use_internal_osc, sdram_rate = args.sdram_rate, 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)) if args.build: builder.build(**trellis_argdict(args)) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if __name__ == "__main__": main()