202 lines
8.9 KiB
Python
Executable File
202 lines
8.9 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2021 Lucas Teske <lucas@teske.com.br>
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# SPDX-License-Identifier: BSD-2-Clause
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from migen import *
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from litex.gen import *
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from litex.build.io import DDROutput
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from litex_boards.platforms import muselab_icesugar_pro
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from litex.soc.cores.clock import *
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from litex.soc.integration.soc_core import *
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from litex.soc.integration.builder import *
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from litex.soc.cores.video import VideoHDMIPHY
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from litex.soc.cores.led import LedChaser
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from litex.soc.interconnect.csr import *
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from litedram.modules import IS42S16160
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from litedram.phy import GENSDRPHY, HalfRateGENSDRPHY
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from liteeth.phy.ecp5rgmii import LiteEthPHYRGMII
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# CRG ----------------------------------------------------------------------------------------------
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class _CRG(LiteXModule):
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def __init__(self, platform, sys_clk_freq, use_internal_osc=False, with_video_pll=False, sdram_rate="1:1"):
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self.rst = Signal()
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self.cd_sys = ClockDomain()
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if sdram_rate == "1:2":
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self.cd_sys2x = ClockDomain()
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self.cd_sys2x_ps = ClockDomain()
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else:
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self.cd_sys_ps = ClockDomain()
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self.cd_eth = ClockDomain()
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# # #
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# Clk / Rst
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if not use_internal_osc:
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clk = platform.request("clk25")
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clk_freq = 25e6
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else:
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clk = Signal()
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div = 5
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self.specials += Instance("OSCG",
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p_DIV = div,
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o_OSC = clk
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)
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clk_freq = 310e6/div
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rst_n = platform.request("cpu_reset_n")
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# PLL
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self.pll = pll = ECP5PLL()
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self.comb += pll.reset.eq(~rst_n | self.rst)
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pll.register_clkin(clk, clk_freq)
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pll.create_clkout(self.cd_sys, sys_clk_freq)
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if sdram_rate == "1:2":
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pll.create_clkout(self.cd_sys2x, 2*sys_clk_freq)
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pll.create_clkout(self.cd_sys2x_ps, 2*sys_clk_freq, phase=180) # Idealy 90° but needs to be increased.
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else:
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pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=180) # Idealy 90° but needs to be increased.
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pll.create_clkout(self.cd_eth, 50e6)
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# Video PLL
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if with_video_pll:
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self.video_pll = video_pll = ECP5PLL()
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self.comb += video_pll.reset.eq(~rst_n | self.rst)
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video_pll.register_clkin(clk, clk_freq)
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self.cd_hdmi = ClockDomain()
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self.cd_hdmi5x = ClockDomain()
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video_pll.create_clkout(self.cd_hdmi, 25e6, margin=0)
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video_pll.create_clkout(self.cd_hdmi5x, 125e6, margin=0)
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# SDRAM clock
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sdram_clk = ClockSignal("sys2x_ps" if sdram_rate == "1:2" else "sys_ps")
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self.specials += DDROutput(1, 0, platform.request("sdram_clock"), sdram_clk)
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# BaseSoC ------------------------------------------------------------------------------------------
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class BaseSoC(SoCCore):
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def __init__(self, sys_clk_freq=50e6, toolchain="trellis",
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with_led_chaser = True,
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with_spi_flash = False,
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use_internal_osc = False,
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sdram_rate = "1:1",
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with_video_terminal = False,
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with_video_framebuffer = False,
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with_ethernet = False,
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with_etherbone = False,
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eth_ip = "192.168.1.50",
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eth_dynamic_ip = False,
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**kwargs):
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platform = muselab_icesugar_pro.Platform(toolchain=toolchain)
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# CRG --------------------------------------------------------------------------------------
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with_video_pll = with_video_terminal or with_video_framebuffer
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self.crg = _CRG(platform, sys_clk_freq, use_internal_osc=use_internal_osc, with_video_pll=with_video_pll, sdram_rate=sdram_rate)
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, int(sys_clk_freq), ident="LiteX SoC on Muselab iCESugar Pro", **kwargs)
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# Leds -------------------------------------------------------------------------------------
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if with_led_chaser:
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ledn = platform.request_all("user_led_n")
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self.leds = LedChaser(pads=ledn, sys_clk_freq=sys_clk_freq)
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# SPI Flash --------------------------------------------------------------------------------
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if with_spi_flash:
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from litespi.modules import W25Q256
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from litespi.opcodes import SpiNorFlashOpCodes as Codes
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self.add_spi_flash(mode="1x", module=W25Q256(Codes.READ_1_1_1))
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# SDR SDRAM --------------------------------------------------------------------------------
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if not self.integrated_main_ram_size:
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sdrphy_cls = HalfRateGENSDRPHY if sdram_rate == "1:2" else GENSDRPHY
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self.sdrphy = sdrphy_cls(platform.request("sdram"))
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self.add_sdram("sdram",
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phy = self.sdrphy,
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module = IS42S16160(sys_clk_freq, sdram_rate),
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l2_cache_size = kwargs.get("l2_size", 8192)
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)
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# Video ------------------------------------------------------------------------------------
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if with_video_terminal or with_video_framebuffer:
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self.videophy = VideoHDMIPHY(platform.request("gpdi"), clock_domain="hdmi")
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if with_video_terminal:
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self.add_video_terminal(phy=self.videophy, timings="640x480@60Hz", clock_domain="hdmi")
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if with_video_framebuffer:
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self.add_video_framebuffer(phy=self.videophy, timings="640x480@60Hz", clock_domain="hdmi")
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# Ethernet / Etherbone ---------------------------------------------------------------------
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if with_ethernet or with_etherbone:
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from liteeth.phy.rmii import LiteEthPHYRMII
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self.ethphy = LiteEthPHYRMII(
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clock_pads = self.platform.request("eth_clocks"),
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pads = self.platform.request("eth"))
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if with_ethernet:
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self.add_ethernet(phy=self.ethphy, dynamic_ip=eth_dynamic_ip)
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if with_etherbone:
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self.add_etherbone(phy=self.ethphy, ip_address=eth_ip)
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# Build --------------------------------------------------------------------------------------------
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def main():
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from litex.build.parser import LiteXArgumentParser
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parser = LiteXArgumentParser(platform=muselab_icesugar_pro.Platform, description="LiteX SoC on Colorlight i5.")
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parser.add_target_argument("--sys-clk-freq", default=50e6, help="System clock frequency.")
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sdopts = parser.target_group.add_mutually_exclusive_group()
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sdopts.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.")
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sdopts.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support.")
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parser.add_target_argument("--with-spi-flash", action="store_true", help="Enable SPI Flash (MMAPed).")
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parser.add_target_argument("--use-internal-osc", action="store_true", help="Use internal oscillator.")
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parser.add_target_argument("--sdram-rate", default="1:1", help="SDRAM Rate (1:1 Full Rate or 1:2 Half Rate).")
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viopts = parser.target_group.add_mutually_exclusive_group()
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viopts.add_argument("--with-video-terminal", action="store_true", help="Enable Video Terminal (HDMI).")
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viopts.add_argument("--with-video-framebuffer", action="store_true", help="Enable Video Framebuffer (HDMI).")
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ethopts = parser.target_group.add_mutually_exclusive_group()
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ethopts.add_argument("--with-ethernet", action="store_true", help="Add Ethernet.")
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ethopts.add_argument("--with-etherbone", action="store_true", help="Add EtherBone.")
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parser.add_target_argument("--eth-ip", default="192.168.1.50", help="Etherbone IP address.")
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parser.add_target_argument("--eth-dynamic-ip", action="store_true", help="Enable dynamic Ethernet IP addresses setting.")
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args = parser.parse_args()
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soc = BaseSoC(
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sys_clk_freq = args.sys_clk_freq,
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toolchain = args.toolchain,
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use_internal_osc = args.use_internal_osc,
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sdram_rate = args.sdram_rate,
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with_spi_flash = args.with_spi_flash,
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with_video_terminal = args.with_video_terminal,
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with_video_framebuffer = args.with_video_framebuffer,
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with_ethernet = args.with_ethernet,
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with_etherbone = args.with_etherbone,
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eth_ip = args.eth_ip,
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eth_dynamic_ip = args.eth_dynamic_ip,
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**parser.soc_argdict
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)
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if args.with_spi_sdcard:
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soc.add_spi_sdcard()
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if args.with_sdcard:
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soc.add_sdcard()
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builder = Builder(soc, **parser.builder_argdict)
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if args.build:
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builder.build(**parser.toolchain_argdict)
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if args.load:
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prog = soc.platform.create_programmer()
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prog.load_bitstream(builder.get_bitstream_filename(mode="sram"))
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if __name__ == "__main__":
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main()
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