litex-boards/litex_boards/targets/sitlinv_a_e115fb.py

79 lines
2.7 KiB
Python
Executable File

#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2022 Icenowy Zheng <icenowy@aosc.io>
# SPDX-License-Identifier: BSD-2-Clause
from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from litex.gen import LiteXModule
from litex_boards.platforms import sitlinv_a_e115fb
from litex.soc.integration.soc_core import *
from litex.soc.integration.builder import *
from litex.soc.cores.clock import CycloneIVPLL
from litex.soc.cores.led import LedChaser
# CRG ----------------------------------------------------------------------------------------------
class _CRG(LiteXModule):
def __init__(self, platform, sys_clk_freq):
self.rst = Signal()
self.cd_sys = ClockDomain()
# # #
# Clk / Rst
clk25 = platform.request("clk25")
rst_n = platform.request("cpu_reset_n")
# PLL
self.pll = pll = CycloneIVPLL(speedgrade="-7")
self.comb += pll.reset.eq(~rst_n | self.rst)
pll.register_clkin(clk25, 25e6)
pll.create_clkout(self.cd_sys, sys_clk_freq)
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
def __init__(self, sys_clk_freq=50e6, with_led_chaser=True, **kwargs):
platform = sitlinv_a_e115fb.Platform()
# CRG --------------------------------------------------------------------------------------
self.crg = _CRG(platform, sys_clk_freq)
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on A-E115FB", **kwargs)
# Leds -------------------------------------------------------------------------------------
if with_led_chaser:
ledn = platform.request_all("user_led_n")
self.leds = LedChaser(pads=ledn, sys_clk_freq=sys_clk_freq)
# Build --------------------------------------------------------------------------------------------
def main():
from litex.build.parser import LiteXArgumentParser
parser = LiteXArgumentParser(platform=sitlinv_a_e115fb.Platform, description="LiteX SoC on A-E115FB.")
parser.add_target_argument("--sys-clk-freq", default=50e6, type=float, help="System clock frequency.")
args = parser.parse_args()
soc = BaseSoC(
sys_clk_freq = args.sys_clk_freq,
**parser.soc_argdict
)
builder = Builder(soc, **parser.builder_argdict)
if args.build:
builder.build(**parser.toolchain_argdict)
if args.load:
prog = soc.platform.create_programmer()
prog.load_bitstream(builder.get_bitstream_filename(mode="sram"))
if __name__ == "__main__":
main()