134 lines
5.0 KiB
Python
Executable File
134 lines
5.0 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
#
|
|
# This file is part of LiteX-Boards.
|
|
#
|
|
# Copyright (c) 2021 Miodrag Milanovic <mmicko@gmail.com>
|
|
# Copyright (c) 2021 Andrew Dennison <andrew@motec.com.au>
|
|
# Copyright (c) 2021 Franck Jullien <franck.jullien@collshade.fr>
|
|
# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
|
|
# SPDX-License-Identifier: BSD-2-Clause
|
|
|
|
import argparse
|
|
|
|
from migen import *
|
|
from migen.genlib.resetsync import AsyncResetSynchronizer
|
|
|
|
from litex_boards.platforms import jungle_electronics_fireant
|
|
|
|
from litex.build.generic_platform import *
|
|
|
|
from litex.soc.cores.clock import *
|
|
from litex.soc.integration.soc_core import *
|
|
from litex.soc.integration.soc import SoCRegion
|
|
|
|
from litex.soc.integration.builder import *
|
|
from litex.soc.cores.led import LedChaser
|
|
|
|
kB = 1024
|
|
mB = 1024*kB
|
|
|
|
# CRG ----------------------------------------------------------------------------------------------
|
|
|
|
class _CRG(Module):
|
|
def __init__(self, platform, sys_clk_freq):
|
|
self.clock_domains.cd_sys = ClockDomain()
|
|
|
|
# # #
|
|
|
|
clk33 = platform.request("clk33")
|
|
rst_n = platform.request("user_btn", 0)
|
|
|
|
# PLL.
|
|
self.submodules.pll = pll = TRIONPLL(platform)
|
|
self.comb += pll.reset.eq(~rst_n)
|
|
pll.register_clkin(clk33, 33.333e6)
|
|
pll.create_clkout(self.cd_sys, sys_clk_freq, with_reset=True)
|
|
|
|
# Default peripherals
|
|
serial = [
|
|
("serial", 0,
|
|
Subsignal("tx", Pins("J2:2")),
|
|
Subsignal("rx", Pins("J2:3")),
|
|
IOStandard("3.3_V_LVTTL_/_LVCMOS") , Misc("WEAK_PULLUP")
|
|
)
|
|
]
|
|
|
|
# BaseSoC ------------------------------------------------------------------------------------------
|
|
|
|
class BaseSoC(SoCCore):
|
|
mem_map = {**SoCCore.mem_map, **{"spiflash": 0x80000000}}
|
|
def __init__(self, bios_flash_offset, sys_clk_freq, with_led_chaser=True, **kwargs):
|
|
platform = jungle_electronics_fireant.Platform()
|
|
platform.add_extension(serial)
|
|
|
|
# Disable Integrated ROM since too large for this device.
|
|
kwargs["integrated_rom_size"] = 0
|
|
|
|
# Set CPU variant / reset address
|
|
if kwargs.get("cpu_type", "vexriscv") == "vexriscv":
|
|
kwargs["cpu_variant"] = "minimal"
|
|
kwargs["cpu_reset_address"] = self.mem_map["spiflash"] + bios_flash_offset
|
|
|
|
# SoCCore ----------------------------------------------------------------------------------
|
|
SoCCore.__init__(self, platform, sys_clk_freq,
|
|
ident = "LiteX SoC on Jungle Electronics FireAnt",
|
|
ident_version = True,
|
|
**kwargs)
|
|
|
|
# CRG --------------------------------------------------------------------------------------
|
|
self.submodules.crg = _CRG(platform, sys_clk_freq)
|
|
|
|
# SPI Flash --------------------------------------------------------------------------------
|
|
from litespi.modules import W25Q80BV
|
|
from litespi.opcodes import SpiNorFlashOpCodes as Codes
|
|
# Board is using W25Q80DV, which is replacemenet for W25Q80BV
|
|
self.add_spi_flash(mode="1x", module=W25Q80BV(Codes.READ_1_1_1), with_master=False)
|
|
|
|
# Add ROM linker region --------------------------------------------------------------------
|
|
self.bus.add_region("rom", SoCRegion(
|
|
origin = self.mem_map["spiflash"] + bios_flash_offset,
|
|
size = 32*kB,
|
|
linker = True)
|
|
)
|
|
|
|
# Leds -------------------------------------------------------------------------------------
|
|
if with_led_chaser:
|
|
self.submodules.leds = LedChaser(
|
|
pads = platform.request_all("user_led"),
|
|
sys_clk_freq = sys_clk_freq)
|
|
|
|
# Build --------------------------------------------------------------------------------------------
|
|
|
|
|
|
def main():
|
|
parser = argparse.ArgumentParser(description="LiteX SoC on Jungle Electronics FireAnt")
|
|
parser.add_argument("--build", action="store_true", help="Build bitstream")
|
|
parser.add_argument("--load", action="store_true", help="Load bitstream")
|
|
parser.add_argument("--flash", action="store_true", help="Flash Bitstream")
|
|
parser.add_argument("--sys-clk-freq", default=33.333e6, help="System clock frequency (default: 33.333MHz)")
|
|
parser.add_argument("--bios-flash-offset", default="0x40000", help="BIOS offset in SPI Flash (default: 0x40000)")
|
|
|
|
builder_args(parser)
|
|
soc_core_args(parser)
|
|
args = parser.parse_args()
|
|
|
|
soc = BaseSoC(
|
|
bios_flash_offset = int(args.bios_flash_offset, 0),
|
|
sys_clk_freq = int(float(args.sys_clk_freq)),
|
|
**soc_core_argdict(args))
|
|
builder = Builder(soc, **builder_argdict(args))
|
|
builder.build(run=args.build)
|
|
|
|
if args.load:
|
|
prog = soc.platform.create_programmer()
|
|
prog.load_bitstream(os.path.join(builder.gateware_dir, f"{soc.build_name}.hex"))
|
|
|
|
if args.flash:
|
|
prog = soc.platform.create_programmer()
|
|
prog.flash(0, os.path.join(builder.gateware_dir, f"{soc.build_name}.hex"))
|
|
prog.flash(args.bios_flash_offset, os.path.join(builder.software_dir, "bios/bios.bin"))
|
|
|
|
if __name__ == "__main__":
|
|
main()
|