64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2021 Miodrag Milanovic <mmicko@gmail.com>
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# SPDX-License-Identifier: BSD-2-Clause
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# Board schematics at:
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# https://github.com/jungle-elec/FireAnt
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from litex.build.generic_platform import *
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from litex.build.efinix.platform import EfinixPlatform
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from litex.build.openfpgaloader import OpenFPGALoader
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# IOs ----------------------------------------------------------------------------------------------
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_io = [
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# Clk
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("clk33", 0, Pins("C3"), IOStandard("3.3_V_LVTTL_/_LVCMOS")),
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# Leds
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("user_led", 0, Pins("C5"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=1")),
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("user_led", 1, Pins("B6"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=1")),
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("user_led", 2, Pins("C7"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=1")),
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("user_led", 3, Pins("A9"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=1")),
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# Buttons
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("user_btn", 0, Pins("J9"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("WEAK_PULLUP")),
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("user_btn", 1, Pins("J8"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("WEAK_PULLUP")),
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# SPIFlash
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("spiflash", 0,
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Subsignal("cs_n", Pins("J4")),
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Subsignal("clk", Pins("H4")),
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Subsignal("mosi", Pins("F4")),
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Subsignal("miso", Pins("H3")),
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IOStandard("3.3_V_LVTTL_/_LVCMOS")
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),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = [
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["J1", " - G5 G4 J3 G3 J2 H2 F3 G1 F1 E2 E1 C2 D2 E3 D3 B3 A5 B5 -"],
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["J2", " - - H8 G8 H9 G9 F5 F6 F7 E7 F8 E8 D9 B9 C8 B8 A8 C6 A6 -"],
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]
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# Platform -----------------------------------------------------------------------------------------
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class Platform(EfinixPlatform):
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default_clk_name = "clk33"
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default_clk_freq = 33.33e6
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default_clk_period = 1e9/33.33e6
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def __init__(self, toolchain="efinity"):
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EfinixPlatform.__init__(self, "T8F81C2", _io, _connectors, toolchain=toolchain)
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def create_programmer(self):
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return OpenFPGALoader("fireant")
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def do_finalize(self, fragment):
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EfinixPlatform.do_finalize(self, fragment)
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self.add_period_constraint(self.lookup_request("clk33", loose=True), 1e9/33.33e6)
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