litex-boards/litex_boards/platforms/jungle_electronics_fireant.py

63 lines
2.2 KiB
Python

#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2021 Miodrag Milanovic <mmicko@gmail.com>
# SPDX-License-Identifier: BSD-2-Clause
# Board schematics at:
# https://github.com/jungle-elec/FireAnt
from litex.build.generic_platform import *
from litex.build.efinix.platform import EfinixPlatform
from litex.build.openfpgaloader import OpenFPGALoader
# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk
("clk33", 0, Pins("C3"), IOStandard("3.3_V_LVTTL_/_LVCMOS")),
# Leds
("user_led", 0, Pins("C5"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=1")),
("user_led", 1, Pins("B6"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=1")),
("user_led", 2, Pins("C7"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=1")),
("user_led", 3, Pins("A9"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=1")),
# Buttons
("user_btn", 0, Pins("J9"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("WEAK_PULLUP")),
("user_btn", 1, Pins("J8"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("WEAK_PULLUP")),
# SPIFlash
("spiflash", 0,
Subsignal("cs_n", Pins("J4")),
Subsignal("clk", Pins("H4")),
Subsignal("mosi", Pins("F4")),
Subsignal("miso", Pins("H3")),
IOStandard("3.3_V_LVTTL_/_LVCMOS")
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = [
["J1", " - G5 G4 J3 G3 J2 H2 F3 G1 F1 E2 E1 C2 D2 E3 D3 B3 A5 B5 -"],
["J2", " - - H8 G8 H9 G9 F5 F6 F7 E7 F8 E8 D9 B9 C8 B8 A8 C6 A6 -"],
]
# Platform -----------------------------------------------------------------------------------------
class Platform(EfinixPlatform):
default_clk_name = "clk33"
default_clk_period = 1e9/33.33e6
def __init__(self):
EfinixPlatform.__init__(self, "T8F81C2", _io, _connectors, toolchain="efinity")
def create_programmer(self):
return OpenFPGALoader("fireant")
def do_finalize(self, fragment):
EfinixPlatform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk33", loose=True), 1e9/33.33e6)