95 lines
2.9 KiB
Python
95 lines
2.9 KiB
Python
#
|
|
# This file is part of LiteX-Boards.
|
|
#
|
|
# Copyright (c) 2023 Icenowy Zheng <uwu@icenowy.me>
|
|
# SPDX-License-Identifier: BSD-2-Clause
|
|
|
|
from migen import *
|
|
|
|
from litex.build.generic_platform import *
|
|
from litex.build.gowin.platform import GowinPlatform
|
|
from litex.build.gowin.programmer import GowinProgrammer
|
|
from litex.build.openfpgaloader import OpenFPGALoader
|
|
|
|
|
|
# IOs ----------------------------------------------------------------------------------------------
|
|
|
|
_io = [
|
|
# Clk / Rst.
|
|
("clk27", 0, Pins("4"), IOStandard("LVCMOS33")),
|
|
|
|
# Serial.
|
|
("serial", 0,
|
|
Subsignal("rx", Pins("70")),
|
|
Subsignal("tx", Pins("69")),
|
|
IOStandard("LVCMOS33")
|
|
),
|
|
|
|
# SPIFlash.
|
|
("spiflash", 0,
|
|
Subsignal("cs_n", Pins("60"), IOStandard("LVCMOS33")),
|
|
Subsignal("clk", Pins("59"), IOStandard("LVCMOS33")),
|
|
Subsignal("miso", Pins("62"), IOStandard("LVCMOS33")),
|
|
Subsignal("mosi", Pins("61"), IOStandard("LVCMOS33")),
|
|
),
|
|
|
|
# SDCard.
|
|
("spisdcard", 0,
|
|
Subsignal("clk", Pins("83")),
|
|
Subsignal("mosi", Pins("82")),
|
|
Subsignal("cs_n", Pins("81")),
|
|
Subsignal("miso", Pins("84")),
|
|
IOStandard("LVCMOS33"),
|
|
),
|
|
("sdcard", 0,
|
|
Subsignal("data", Pins("84 85 80 81")),
|
|
Subsignal("cmd", Pins("82")),
|
|
Subsignal("clk", Pins("83")),
|
|
IOStandard("LVCMOS33"),
|
|
),
|
|
|
|
# Leds
|
|
("led_n", 0, Pins("15"), IOStandard("LVCMOS33")),
|
|
("led_n", 1, Pins("16"), IOStandard("LVCMOS33")),
|
|
("led_n", 2, Pins("17"), IOStandard("LVCMOS33")),
|
|
("led_n", 3, Pins("18"), IOStandard("LVCMOS33")),
|
|
("led_n", 4, Pins("19"), IOStandard("LVCMOS33")),
|
|
("led_n", 5, Pins("20"), IOStandard("LVCMOS33")),
|
|
|
|
# RGB Led.
|
|
("rgb_led", 0, Pins("79"), IOStandard("LVCMOS33")),
|
|
|
|
# Buttons.
|
|
("btn", 0, Pins("88"), IOStandard("LVCMOS33")),
|
|
("btn", 1, Pins("87"), IOStandard("LVCMOS33")),
|
|
]
|
|
|
|
# Connectors ---------------------------------------------------------------------------------------
|
|
|
|
_connectors = [
|
|
# TODO
|
|
]
|
|
|
|
# Platform -----------------------------------------------------------------------------------------
|
|
|
|
class Platform(GowinPlatform):
|
|
default_clk_name = "clk27"
|
|
default_clk_period = 1e9/27e6
|
|
|
|
def __init__(self, dock="standard", toolchain="gowin"):
|
|
|
|
GowinPlatform.__init__(self, "GW2AR-LV18QN88C8/I7", _io, _connectors, toolchain=toolchain, devicename="GW2AR-18C")
|
|
|
|
self.toolchain.options["use_mspi_as_gpio"] = 1
|
|
self.toolchain.options["use_sspi_as_gpio"] = 1
|
|
self.toolchain.options["use_ready_as_gpio"] = 1
|
|
self.toolchain.options["use_done_as_gpio"] = 1
|
|
self.toolchain.options["rw_check_on_ram"] = 1
|
|
|
|
def create_programmer(self, kit="openfpgaloader"):
|
|
return OpenFPGALoader(cable="ft2232")
|
|
|
|
def do_finalize(self, fragment):
|
|
GowinPlatform.do_finalize(self, fragment)
|
|
self.add_period_constraint(self.lookup_request("clk27", loose=True), 1e9/27e6)
|