44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
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#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
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# SPDX-License-Identifier: BSD-2-Clause
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from migen import *
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from litex.build.generic_platform import *
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from litex.build.gowin.platform import GowinPlatform
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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 / Rst
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("clk27", 0, Pins("45"), IOStandard("LVCMOS33")),
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("rst_n", 0, Pins("15"), IOStandard("LVCMOS33")),
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# Leds
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("user_led", 0, Pins("10"), IOStandard("LVCMOS33")),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = []
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# Platform -----------------------------------------------------------------------------------------
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class Platform(GowinPlatform):
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default_clk_name = "clk27"
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default_clk_period = 1e9/27e6
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def __init__(self):
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GowinPlatform.__init__(self, "GW1NSR-LV4CQN48PC7/I6", _io, _connectors, toolchain="gowin", devicename="GW1NSR-4C")
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self.toolchain.options["use_mode_as_gpio"] = 1
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def create_programmer(self):
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return OpenFPGALoader("tangnano")
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def do_finalize(self, fragment):
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GowinPlatform.do_finalize(self, fragment)
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self.add_period_constraint(self.lookup_request("clk27", loose=True), 1e9/100e6)
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