#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) Lone Dynamics Corporation # # SPDX-License-Identifier: BSD-2-Clause # import os import sys import json from migen import * from litex.gen import * from litex_boards.platforms import machdyne_minze from litex.build.io import DDROutput from litex.soc.cores.clock import * from litex.soc.cores.led import LedChaser from litex.soc.cores.usb_ohci import USBOHCI from litex.soc.cores.video import VideoVGAPHY from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litedram.modules import W9825G6KH6 from litedram.modules import IS42S16320 from litedram.phy import GENSDRPHY, HalfRateGENSDRPHY from litex.soc.integration.soc import SoCRegion # CRG --------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq, sdram_rate): self.rst = Signal() self.cd_por = ClockDomain() self.cd_sys = ClockDomain() self.cd_video = ClockDomain() # Clk / Rst clk48 = platform.request("clk48") # Power on reset por_count = Signal(16, reset=2**16-1) por_done = Signal() self.comb += self.cd_por.clk.eq(clk48) self.comb += por_done.eq(por_count == 0) self.sync.por += If(~por_done, por_count.eq(por_count - 1)) # PLL self.pll = pll = ECP5PLL() self.comb += pll.reset.eq(~por_done | self.rst) pll.register_clkin(clk48, 48e6) pll.create_clkout(self.cd_sys, sys_clk_freq) if sdram_rate == "1:2": self.cd_sys2x = ClockDomain() self.cd_sys2x_ps = ClockDomain() pll.create_clkout(self.cd_sys2x, 2*sys_clk_freq) pll.create_clkout(self.cd_sys2x_ps, 2*sys_clk_freq, phase=180) else: self.cd_sys_ps = ClockDomain() pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=90) if sdram_rate == "1:2": sdram_clk = ClockSignal("sys2x_ps") else: sdram_clk = ClockSignal("sys_ps") self.specials += DDROutput(1, 0, platform.request("sdram_clock"), sdram_clk) pll2 = ECP5PLL() self.pll2 = pll2 pll2.register_clkin(clk48, 48e6) pll2.create_clkout(self.cd_video, 25e6) self.cd_usb_12 = ClockDomain() self.cd_usb = ClockDomain() self.cd_usb_48 = ClockDomain() self.cd_usb_48 = self.cd_usb pll2.create_clkout(self.cd_usb, 48e6) pll2.create_clkout(self.cd_usb_12, 12e6) self.comb += pll2.reset.eq(~por_done) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): mem_map = {**SoCCore.mem_map, **{ "usb_ohci": 0xc0000000, }} def __init__(self, revision="v0", device="12F", sdram_device="W9825G6KH6", sdram_rate="1:2", sys_clk_freq=int(48e6), toolchain="trellis", with_led_chaser=False, with_usb_host=False, **kwargs): platform = machdyne_minze.Platform(revision=revision, device=device ,toolchain=toolchain) # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq, sdram_rate=sdram_rate) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Minze", **kwargs) # DRAM ------------------------------------------------------------------------------------- if not self.integrated_main_ram_size: if sdram_rate == "1:2": sdrphy_cls = HalfRateGENSDRPHY else: sdrphy_cls = GENSDRPHY self.sdrphy = sdrphy_cls(platform.request("sdram"), sys_clk_freq) if sdram_device == "W9825G6KH6": self.add_sdram("sdram", phy = self.sdrphy, module = W9825G6KH6(sys_clk_freq, sdram_rate), l2_cache_size = kwargs.get("l2_size", 0) ) if sdram_device == "IS42S16320": self.add_sdram("sdram", phy = self.sdrphy, module = IS42S16320(self.clk_freq, sdram_rate), l2_cache_size = kwargs.get("l2_size", 0) ) # USB Host --------------------------------------------------------------------------------- if with_usb_host: self.usb_ohci = USBOHCI(platform, platform.request("usb_host"), usb_clk_freq=int(48e6)) self.bus.add_slave("usb_ohci_ctrl", self.usb_ohci.wb_ctrl, region=SoCRegion(origin=self.mem_map["usb_ohci"], size=0x100000, cached=False)) self.dma_bus.add_master("usb_ohci_dma", master=self.usb_ohci.wb_dma) self.comb += self.cpu.interrupt[16].eq(self.usb_ohci.interrupt) # VGA Framebuffer ------------------------------------------------------------------------------------- self.videophy = VideoVGAPHY(platform.request("vga"), clock_domain="video") self.add_video_framebuffer(phy=self.videophy, timings="640x480@60Hz", clock_domain="video", format="rgb565") # VGA Terminal ------------------------------------------------------------------------------------- #self.videophy = VideoVGAPHY(platform.request("vga"), # clock_domain="video") #self.add_video_terminal(phy=self.videophy, timings="640x480@60Hz", # clock_domain="video") # 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=machdyne_minze.Platform, description="LiteX SoC on Minze") parser.add_argument("--sys-clk-freq", default=48e6, help="System clock frequency.") parser.add_argument("--revision", default="v0", help="Board Revision (v0).") parser.add_argument("--device", default="12F", help="ECP5 device (25F, 45F or 85F).") parser.add_argument("--cable", default="dirtyJtag", help="Specify an openFPGALoader cable.") parser.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support.") parser.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.") parser.add_argument("--with-usb-host", action="store_true", help="Enable USB host support.") parser.add_argument("--boot-from-flash", action="store_true", help="Boot from flash MMOD.") parser.add_argument("--sdram-device", default="W9825G6KH6", help="SDRAM device (W9825G6KH6 or IS42S16320).") args = parser.parse_args() soc = BaseSoC( toolchain = args.toolchain, revision = args.revision, device = args.device, sys_clk_freq = int(float(args.sys_clk_freq)), sdram_device = args.sdram_device, with_usb_host = args.with_usb_host, **parser.soc_argdict) if args.with_sdcard: soc.add_sdcard() if args.with_spi_sdcard: soc.add_spi_sdcard() builder = Builder(soc, **parser.builder_argdict) if args.build: builder.build(**parser.toolchain_argdict) if args.load: prog = soc.platform.create_programmer(cable=args.cable) prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if __name__ == "__main__": main()