litex-boards/litex_boards/platforms/kosagi_fomu_pvt.py

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#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2019 Tom Keddie <git@bronwenandtom.com>
# SPDX-License-Identifier: BSD-2-Clause
# Fomu PVT board:
# - Crowd Supply campaign: https://www.crowdsupply.com/sutajio-kosagi/fomu
# - Design files: https://github.com/im-tomu/fomu-hardware/tree/pvt/hardware/pcb
from litex.build.generic_platform import *
from litex.build.lattice import LatticeiCE40Platform
from litex.build.lattice.programmer import IceStormProgrammer
# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk / Rst
("clk48", 0, Pins("F4"), IOStandard("LVCMOS33")),
# Leds
("user_led_n", 0, Pins("A5"), IOStandard("LVCMOS33")),
("rgb_led", 0,
Subsignal("r", Pins("C5")),
Subsignal("g", Pins("B5")),
Subsignal("b", Pins("A5")),
IOStandard("LVCMOS33")
),
# Buttons
("user_touch_n", 0, Pins("E4"), IOStandard("LVCMOS33")),
("user_touch_n", 1, Pins("D5"), IOStandard("LVCMOS33")),
("user_touch_n", 2, Pins("E5"), IOStandard("LVCMOS33")),
("user_touch_n", 3, Pins("F5"), IOStandard("LVCMOS33")),
# USB
("usb", 0,
Subsignal("d_p", Pins("A1")),
Subsignal("d_n", Pins("A2")),
Subsignal("pullup", Pins("A4")),
IOStandard("LVCMOS33")
),
# SPIFlash
("spiflash", 0,
Subsignal("cs_n", Pins("C1"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("D1"), IOStandard("LVCMOS33")),
Subsignal("mosi", Pins("F1"), IOStandard("LVCMOS33")),
Subsignal("miso", Pins("E1"), IOStandard("LVCMOS33")),
Subsignal("wp", Pins("F2"), IOStandard("LVCMOS33")),
Subsignal("hold", Pins("B1"), IOStandard("LVCMOS33")),
),
("spiflash4x", 0,
Subsignal("cs_n", Pins("C1"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("D1"), IOStandard("LVCMOS33")),
Subsignal("dq", Pins("F1 E1 F2 B1"), IOStandard("LVCMOS33")),
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = [
("touch_pins", "E4 D5 E5 F5"),
]
# Platform -----------------------------------------------------------------------------------------
class Platform(LatticeiCE40Platform):
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default_clk_name = "clk48"
default_clk_period = 1e9/48e6
def __init__(self, toolchain="icestorm"):
LatticeiCE40Platform.__init__(self, "ice40-up5k-uwg30", _io, _connectors, toolchain=toolchain)
def create_programmer(self):
return IceStormProgrammer()
def do_finalize(self, fragment):
LatticeiCE40Platform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk48", loose=True), 1e9/48e6)