litex-boards/litex_boards/platforms/fomu_evt.py

98 lines
3.0 KiB
Python

#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2019 Tom Keddie <git@bronwenandtom.com>
# Copyright (c) 2019 Sean Cross <sean@xobs.io>
# SPDX-License-Identifier: BSD-2-Clause
# Fomu EVT board:
# - Crowd Supply campaign: https://www.crowdsupply.com/sutajio-kosagi/fomu
# - Design files: https://github.com/im-tomu/fomu-hardware/tree/evt/hardware/pcb
from litex.build.generic_platform import *
from litex.build.lattice import LatticePlatform
from litex.build.lattice.programmer import IceStormProgrammer
# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk / Rst
("clk48", 0, Pins("44"), IOStandard("LVCMOS33")),
# Leds
("user_led_n", 0, Pins("41"), IOStandard("LVCMOS33")),
("rgb_led", 0,
Subsignal("r", Pins("40")),
Subsignal("g", Pins("39")),
Subsignal("b", Pins("41")),
IOStandard("LVCMOS33"),
),
# Buttons
("user_btn_n", 0, Pins("42"), IOStandard("LVCMOS33")),
("user_btn_n", 1, Pins("38"), IOStandard("LVCMOS33")),
# Serial
("serial", 0,
Subsignal("rx", Pins("21")),
Subsignal("tx", Pins("13"), Misc("PULLUP")),
IOStandard("LVCMOS33")
),
# USB
("usb", 0,
Subsignal("d_p", Pins("34")),
Subsignal("d_n", Pins("37")),
Subsignal("pullup", Pins("35")),
Subsignal("pulldown", Pins("36")),
IOStandard("LVCMOS33")
),
# SPIFlash
("spiflash", 0,
Subsignal("cs_n", Pins("16"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("15"), IOStandard("LVCMOS33")),
Subsignal("miso", Pins("17"), IOStandard("LVCMOS33")),
Subsignal("mosi", Pins("14"), IOStandard("LVCMOS33")),
Subsignal("wp", Pins("18"), IOStandard("LVCMOS33")),
Subsignal("hold", Pins("19"), IOStandard("LVCMOS33")),
),
("spiflash4x", 0,
Subsignal("cs_n", Pins("16"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("15"), IOStandard("LVCMOS33")),
Subsignal("dq", Pins("14 17 18 19"), IOStandard("LVCMOS33")),
),
# I2C
("i2c", 0,
Subsignal("scl", Pins("12"), IOStandard("LVCMOS18")),
Subsignal("sda", Pins("20"), IOStandard("LVCMOS18")),
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = [
("touch_pins", "48 47 46 45"),
("pmoda_n", "28 27 26 23"),
("pmodb_n", "48 47 46 45"),
("dbg", "20 12 11 25 10 9"),
]
# Platform -----------------------------------------------------------------------------------------
class Platform(LatticePlatform):
default_clk_name = "clk48"
default_clk_period = 1e9/48e6
def __init__(self, toolchain="icestorm"):
LatticePlatform.__init__(self, "ice40-up5k-sg48", _io, _connectors, toolchain=toolchain)
def create_programmer(self):
return IceStormProgrammer()
def do_finalize(self, fragment):
LatticePlatform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk48", loose=True), 1e9/48e6)