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#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2021 Lucas Teske <lucas@teske.com.br>
# SPDX-License-Identifier: BSD-2-Clause
import os
import argparse
import sys
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
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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(reset_less=True)
else:
self.clock_domains.cd_sys_ps = ClockDomain(reset_less=True)
# # #
# 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, 40e6, margin=0)
video_pll.create_clkout(self.cd_hdmi5x, 200e6, 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=60e6, with_led_chaser=True,
use_internal_osc=False, sdram_rate="1:1", with_video_terminal=False,
with_video_framebuffer=False, **kwargs):
platform = muselab_icesugar_pro.Platform()
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self, platform, int(sys_clk_freq),
ident = "LiteX SoC on Muselab iCESugar Pro",
ident_version = True,
**kwargs)
# 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)
# 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 --------------------------------------------------------------------------------
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")
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if with_video_terminal:
self.add_video_terminal(phy=self.videophy, timings="800x600@60Hz", clock_domain="hdmi")
if with_video_framebuffer:
self.add_video_framebuffer(phy=self.videophy, timings="800x600@60Hz", clock_domain="hdmi")
# Build --------------------------------------------------------------------------------------------
def main():
parser = argparse.ArgumentParser(description="LiteX SoC on Colorlight i5")
parser.add_argument("--build", action="store_true", help="Build bitstream")
parser.add_argument("--load", action="store_true", help="Load bitstream")
parser.add_argument("--sys-clk-freq", default=60e6, help="System clock frequency (default: 60MHz)")
sdopts = parser.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")
parser.add_argument("--use-internal-osc", action="store_true", help="Use internal oscillator")
parser.add_argument("--sdram-rate", default="1:1", help="SDRAM Rate: 1:1 Full Rate (default), 1:2 Half Rate")
viopts = parser.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,
l2_size = args.l2_size,
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.build(**trellis_argdict(args), run=args.build)
if args.load:
prog = soc.platform.create_programmer()
prog.load_bitstream(os.path.join(builder.gateware_dir, soc.build_name + ".bit"))
if __name__ == "__main__":
main()