116 lines
4.1 KiB
Python
116 lines
4.1 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 Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
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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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("clk12", 0, Pins("4"), IOStandard("LVCMOS33")),
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# Leds
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("user_led", 0, Pins("23"), IOStandard("LVCMOS33")),
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("user_led", 1, Pins("24"), IOStandard("LVCMOS33")),
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("user_led", 2, Pins("25"), IOStandard("LVCMOS33")),
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("user_led", 3, Pins("26"), IOStandard("LVCMOS33")),
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("user_led", 4, Pins("27"), IOStandard("LVCMOS33")),
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("user_led", 5, Pins("28"), IOStandard("LVCMOS33")),
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("user_led", 6, Pins("29"), IOStandard("LVCMOS33")),
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("user_led", 7, Pins("30"), IOStandard("LVCMOS33")),
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# RGB led, active-low
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("rgb_led", 0,
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Subsignal("r", Pins("112")),
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Subsignal("g", Pins("114")),
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Subsignal("b", Pins("113")),
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IOStandard("LVCMOS33"),
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),
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("rgb_led", 1,
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Subsignal("r", Pins("106")),
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Subsignal("g", Pins("111")),
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Subsignal("b", Pins("110")),
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IOStandard("LVCMOS33"),
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),
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("rgb_led", 2,
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Subsignal("r", Pins("101")),
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Subsignal("g", Pins("104")),
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Subsignal("b", Pins("102")),
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IOStandard("LVCMOS33"),
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),
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("rgb_led", 3,
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Subsignal("r", Pins("98")),
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Subsignal("g", Pins("100")),
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Subsignal("b", Pins("99")),
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IOStandard("LVCMOS33"),
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),
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# Switches
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("user_sw", 0, Pins("75"), IOStandard("LVCMOS33")),
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("user_sw", 1, Pins("76"), IOStandard("LVCMOS33")),
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("user_sw", 2, Pins("78"), IOStandard("LVCMOS33")),
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("user_sw", 3, Pins("79"), IOStandard("LVCMOS33")),
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("user_sw", 4, Pins("80"), IOStandard("LVCMOS33")),
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("user_sw", 5, Pins("81"), IOStandard("LVCMOS33")),
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("user_sw", 6, Pins("82"), IOStandard("LVCMOS33")),
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("user_sw", 7, Pins("83"), IOStandard("LVCMOS33")),
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# Buttons.
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("user_btn", 0, Pins("58"), IOStandard("LVCMOS33")),
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("user_btn", 1, Pins("59"), IOStandard("LVCMOS33")),
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("user_btn", 2, Pins("60"), IOStandard("LVCMOS33")),
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("user_btn", 3, Pins("61"), IOStandard("LVCMOS33")),
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("user_btn", 4, Pins("62"), IOStandard("LVCMOS33")),
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("user_btn", 5, Pins("63"), IOStandard("LVCMOS33")),
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("user_btn", 6, Pins("64"), IOStandard("LVCMOS33")),
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("user_btn", 7, Pins("65"), IOStandard("LVCMOS33")),
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# Serial.
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# FT232H has only one interface -> use (arbitrary) two pins from J2 to
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# connect an external USB<->serial adapter
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("serial", 0,
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Subsignal("tx", Pins("116")), # J2.17
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Subsignal("rx", Pins("115")), # J2.18
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IOStandard("LVCMOS33")
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),
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# Seven Segment
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("seven_seg_dig", 0, Pins("137"), IOStandard("LVCMOS33")),
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("seven_seg_dig", 1, Pins("140"), IOStandard("LVCMOS33")),
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("seven_seg_dig", 2, Pins("141"), IOStandard("LVCMOS33")),
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("seven_seg_dig", 3, Pins("7"), IOStandard("LVCMOS33")),
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("seven_seg", 0, Pins("138 142 9 11 12 139 8 10"), IOStandard("LVCMOS33")),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = [
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["J1", "- 38 39 40 41 42 43 44 66 67 68 69 70 71 72 96 95 94 93 -"],
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["J2", "- 136 135 134 133 132 131 130 129 128 123 122 121 120 119 118 117 116 115 -"],
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]
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# Platform -----------------------------------------------------------------------------------------
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class Platform(GowinPlatform):
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default_clk_name = "clk12"
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default_clk_period = 1e9/12e6
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def __init__(self):
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GowinPlatform.__init__(self, "GW1N-UV4LQ144C6/I5", _io, _connectors, toolchain="gowin", devicename="GW1N-4")
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self.toolchain.options["use_mspi_as_gpio"] = 1
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def create_programmer(self):
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return OpenFPGALoader("runber")
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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("clk12", loose=True), 1e9/12e6)
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