71 lines
2.3 KiB
Python
71 lines
2.3 KiB
Python
# This file is Copyright (c) 2019 Tom Keddie <git@bronwenandtom.com>
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# License: BSD
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# Fomu Hacker board:
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# - Design files: https://github.com/im-tomu/fomu-hardware/tree/master/hacker/releases/v0.0-19-g154fecc
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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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("clk48", 0, Pins("F5"), IOStandard("LVCMOS33")),
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("user_led_n", 0, Pins("A5"), IOStandard("LVCMOS33")),
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("rgb_led", 0,
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Subsignal("r", Pins("C5")),
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Subsignal("g", Pins("B5")),
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Subsignal("b", Pins("A5")),
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IOStandard("LVCMOS33")
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),
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("user_touch_n", 0, Pins("F4"), IOStandard("LVCMOS33")),
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("user_touch_n", 1, Pins("E5"), IOStandard("LVCMOS33")),
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("user_touch_n", 2, Pins("E4"), IOStandard("LVCMOS33")),
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("user_touch_n", 3, Pins("F2"), IOStandard("LVCMOS33")),
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("usb", 0,
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Subsignal("d_p", Pins("A4")),
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Subsignal("d_n", Pins("A2")),
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Subsignal("pullup", Pins("D5")),
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IOStandard("LVCMOS33")
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),
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("spiflash", 0,
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Subsignal("cs_n", Pins("C1"), IOStandard("LVCMOS33")),
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Subsignal("clk", Pins("D1"), IOStandard("LVCMOS33")),
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Subsignal("mosi", Pins("F1"), IOStandard("LVCMOS33")),
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Subsignal("miso", Pins("E1"), IOStandard("LVCMOS33")),
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),
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("spiflash4x", 0,
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Subsignal("cs_n", Pins("C1"), IOStandard("LVCMOS33")),
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Subsignal("clk", Pins("D1"), IOStandard("LVCMOS33")),
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Subsignal("dq", Pins("F1 E1"), IOStandard("LVCMOS33")),
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),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = [
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("touch_pins", "F4 E5 E4 F2"),
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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):
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LatticePlatform.__init__(self, "ice40-up5k-uwg30", _io, _connectors, toolchain="icestorm")
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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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