114 lines
3.6 KiB
Python
114 lines
3.6 KiB
Python
#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2022 Icenowy Zheng <icenowy@aosc.io>
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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.gowin.programmer import GowinProgrammer
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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("52"), IOStandard("LVCMOS33")),
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# Leds
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("user_led", 0, Pins("10"), IOStandard("LVCMOS18")),
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("user_led", 1, Pins("11"), IOStandard("LVCMOS18")),
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("user_led", 2, Pins("13"), IOStandard("LVCMOS18")),
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("user_led", 3, Pins("14"), IOStandard("LVCMOS18")),
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("user_led", 4, Pins("15"), IOStandard("LVCMOS18")),
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("user_led", 5, Pins("16"), IOStandard("LVCMOS18")),
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# Buttons.
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("user_btn", 0, Pins("3"), IOStandard("LVCMOS18")),
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("user_btn", 1, Pins("4"), IOStandard("LVCMOS18")),
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# Serial
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("serial", 0,
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Subsignal("rx", Pins("18")),
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Subsignal("tx", Pins("17")),
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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("60"), IOStandard("LVCMOS33")),
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Subsignal("clk", Pins("59"), IOStandard("LVCMOS33")),
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Subsignal("miso", Pins("62"), IOStandard("LVCMOS33")),
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Subsignal("mosi", Pins("61"), IOStandard("LVCMOS33")),
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),
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("spisdcard", 0,
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Subsignal("clk", Pins("36")),
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Subsignal("mosi", Pins("37")),
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Subsignal("cs_n", Pins("38")),
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Subsignal("miso", Pins("39")),
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IOStandard("LVCMOS33"),
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),
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# PSRAM
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("O_psram_ck", 0, Pins(2)),
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("O_psram_ck_n", 0, Pins(2)),
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("O_psram_cs_n", 0, Pins(2)),
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("O_psram_reset_n", 0, Pins(2)),
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("IO_psram_dq", 0, Pins(16)),
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("IO_psram_rwds", 0, Pins(2)),
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# HDMI.
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("hdmi", 0,
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Subsignal("clk_p", Pins("69")),
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Subsignal("clk_n", Pins("68")),
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Subsignal("data0_p", Pins("71")),
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Subsignal("data0_n", Pins("70")),
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Subsignal("data1_p", Pins("73")),
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Subsignal("data1_n", Pins("72")),
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Subsignal("data2_p", Pins("75")),
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Subsignal("data2_n", Pins("74")),
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Misc("PULL_MODE=NONE"),
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),
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# SPI RGB LCD.
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("spilcd", 0,
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Subsignal("reset", Pins("47")),
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Subsignal("cs", Pins("48")),
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Subsignal("clk", Pins("79")),
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Subsignal("mosi", Pins("77")),
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Subsignal("rs", Pins("47")),
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IOStandard("LVCMOS33"),
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),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors = [
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["J6", "38 37 36 39 25 26 27 28 29 30 33 34 40 35 41 42 51 53 54 55 56 57 68 69"],
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["J7", "63 86 85 84 83 82 81 80 79 77 76 75 74 73 72 71 70 - 48 49 31 32 - -"],
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]
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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, toolchain="gowin"):
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GowinPlatform.__init__(self, "GW1NR-LV9QN88PC6/I5", _io, _connectors, toolchain=toolchain, devicename="GW1NR-9C")
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self.toolchain.options["use_mspi_as_gpio"] = 1
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def create_programmer(self, kit="openfpgaloader"):
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if kit == "gowin":
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return GowinProgrammer(self.devicename)
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else:
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return OpenFPGALoader(cable="ft2232")
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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), 1e9/27e6)
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