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