159 lines
5.2 KiB
Python
159 lines
5.2 KiB
Python
#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2020 Piotr Esden-Tempski <piotr@esden.net>
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# SPDX-License-Identifier: BSD-2-Clause
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# iCEBreaker FPGA:
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# - Crowd Supply campaign: https://www.crowdsupply.com/1bitsquared/icebreaker
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# - 1BitSquared Store: https://1bitsquared.com/products/icebreaker
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# - Design files: https://github.com/icebreaker-fpga/icebreaker
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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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("clk12", 0, Pins("35"), IOStandard("LVCMOS33")),
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# Leds
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("user_led_n", 0, Pins("11"), IOStandard("LVCMOS33")),
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("user_led_n", 1, Pins("37"), IOStandard("LVCMOS33")),
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("user_ledr_n", 0, Pins("11"), IOStandard("LVCMOS33")), # Color-specific alias
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("user_ledg_n", 0, Pins("37"), IOStandard("LVCMOS33")), # Color-specific alias
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# Button
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("user_btn_n", 0, Pins("10"), IOStandard("LVCMOS33")),
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# Serial
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("serial", 0,
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Subsignal("rx", Pins("6")),
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Subsignal("tx", Pins("9"), Misc("PULLUP")),
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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("12"), IOStandard("LVCMOS33")),
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Subsignal("hold", Pins("13"), 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 12 13"), IOStandard("LVCMOS33")),
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),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = [
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("PMOD1A", "4 2 47 45 3 48 46 44"),
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("PMOD1B", "43 38 34 31 42 36 32 28"),
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("PMOD2", "27 25 21 19 26 23 20 18")
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]
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# The attached LED/button section can be either used standalone or as a PMOD.
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# Attach to platform using:
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# plat.add_extension(break_off_pmod)
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# pmod_btn = plat.request("user_btn")
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break_off_pmod = [
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("user_btn", 0, Pins("PMOD2:6"), IOStandard("LVCMOS33")),
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("user_btn", 1, Pins("PMOD2:3"), IOStandard("LVCMOS33")),
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("user_btn", 2, Pins("PMOD2:7"), IOStandard("LVCMOS33")),
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("user_led", 0, Pins("PMOD2:4"), IOStandard("LVCMOS33")),
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("user_led", 1, Pins("PMOD2:0"), IOStandard("LVCMOS33")),
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("user_led", 2, Pins("PMOD2:1"), IOStandard("LVCMOS33")),
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("user_led", 3, Pins("PMOD2:5"), IOStandard("LVCMOS33")),
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("user_led", 4, Pins("PMOD2:2"), IOStandard("LVCMOS33")),
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# Color-specific aliases
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("user_ledr", 0, Pins("PMOD2:4"), IOStandard("LVCMOS33")),
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("user_ledg", 0, Pins("PMOD2:0"), IOStandard("LVCMOS33")),
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("user_ledg", 1, Pins("PMOD2:1"), IOStandard("LVCMOS33")),
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("user_ledg", 2, Pins("PMOD2:5"), IOStandard("LVCMOS33")),
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("user_ledg", 3, Pins("PMOD2:2"), IOStandard("LVCMOS33"))
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]
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dvi_pmod = [
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("dvi", 0,
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Subsignal("clk", Pins("PMOD1B:1")),
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Subsignal("de", Pins("PMOD1B:6")),
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Subsignal("hsync", Pins("PMOD1B:3")),
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Subsignal("vsync", Pins("PMOD1B:7")),
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Subsignal("r", Pins("PMOD1A:5 PMOD1A:1 PMOD1A:4 PMOD1A:0")),
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Subsignal("g", Pins("PMOD1A:7 PMOD1A:3 PMOD1A:6 PMOD1A:2")),
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Subsignal("b", Pins("PMOD1B:2 PMOD1B:5 PMOD1B:4 PMOD1B:0")),
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IOStandard("LVCMOS33"),
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)
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]
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usb_pmod_1a = [
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("usb", 0,
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Subsignal("d_p", Pins("PMOD1A:2")),
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Subsignal("d_n", Pins("PMOD1A:3")),
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Subsignal("pullup", Pins("PMOD1A:0")),
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IOStandard("LVCMOS33"),
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)
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]
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usb_pmod_1b = [
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("usb", 0,
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Subsignal("d_p", Pins("PMOD1B:2")),
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Subsignal("d_n", Pins("PMOD1B:3")),
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Subsignal("pullup", Pins("PMOD1B:0")),
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IOStandard("LVCMOS33"),
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)
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]
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usb_pmod_2 = [
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("usb", 0,
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Subsignal("d_p", Pins("PMOD2:2")),
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Subsignal("d_n", Pins("PMOD2:3")),
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Subsignal("pullup", Pins("PMOD2:0")),
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IOStandard("LVCMOS33"),
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)
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]
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usb_tnt = [
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("usb", 0,
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Subsignal("d_p", Pins("PMOD1B:3")),
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Subsignal("d_n", Pins("PMOD1B:2")),
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Subsignal("pullup", Pins("PMOD1B:1")),
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IOStandard("LVCMOS33"),
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)
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]
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usb_kbeckmann = [
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("usb", 0,
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Subsignal("d_p", Pins("PMOD1B:0")),
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Subsignal("d_n", Pins("PMOD1B:1")),
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Subsignal("pullup", Pins("PMOD1B:2")),
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IOStandard("LVCMOS33"),
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)
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]
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# Platform -----------------------------------------------------------------------------------------
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class Platform(LatticePlatform):
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default_clk_name = "clk12"
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default_clk_period = 1e9/12e6
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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("clk12", loose=True), 1e9/12e6)
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