63 lines
2.3 KiB
Python
63 lines
2.3 KiB
Python
# This file is Copyright (c) 2019 Greg Davill <greg.davill@gmail.com>
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# License: BSD
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from litex.build.generic_platform import *
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from litex.build.lattice import LatticePlatform
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# IOs ----------------------------------------------------------------------------------------------
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_io = [
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("clk48", 0, Pins("A9"), IOStandard("LVCMOS33")),
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("rgb_led", 0,
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Subsignal("r", Pins("V17"), IOStandard("LVCMOS25")),
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Subsignal("g", Pins("T17"), IOStandard("LVCMOS25")),
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Subsignal("b", Pins("J3"), IOStandard("LVCMOS33")),
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),
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("serial", 0,
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Subsignal("tx", Pins("N17"), IOStandard("LVCMOS25")),
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Subsignal("rx", Pins("M18"), IOStandard("LVCMOS25")),
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),
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("ddram", 0,
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Subsignal("a", Pins(
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"A4 D2 C3 C7 D3 D4 D1 B2",
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"C1 A2 A7 C2 C4"),
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IOStandard("SSTL135_I")),
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Subsignal("ba", Pins("B6 B7 A6"), IOStandard("SSTL135_I")),
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Subsignal("ras_n", Pins("C12"), IOStandard("SSTL135_I")),
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Subsignal("cas_n", Pins("D13"), IOStandard("SSTL135_I")),
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Subsignal("we_n", Pins("B12"), IOStandard("SSTL135_I")),
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Subsignal("cs_n", Pins("A12"), IOStandard("SSTL135_I")),
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Subsignal("dm", Pins("D16 G16"), IOStandard("SSTL135_I")),
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Subsignal("dq", Pins(
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"C17 D15 B17 C16 A15 B13 A17 A13",
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"F17 F16 G15 F15 J16 C18 H16 F18"),
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IOStandard("SSTL135_I"),
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Misc("TERMINATION=75")),
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Subsignal("dqs_p", Pins("B15 G18"), IOStandard("SSTL135D_I"), Misc("TERMINATION=OFF DIFFRESISTOR=100")),
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Subsignal("clk_p", Pins("J18"), IOStandard("SSTL135D_I")),
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Subsignal("cke", Pins("D6"), IOStandard("SSTL135_I")),
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Subsignal("odt", Pins("C13"), IOStandard("SSTL135_I")),
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Subsignal("reset_n", Pins("B1"), IOStandard("SSTL135_I")),
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Misc("SLEWRATE=FAST")
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),
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("spiflash4x", 0,
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Subsignal("cs_n", Pins("U17")),
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Subsignal("clk", Pins("U16")),
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Subsignal("dq", Pins("U18", "T18", "R18", "N18")),
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IOStandard("LVCMOS25")
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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 = "clk48"
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default_clk_period = 1e9/48e6
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def __init__(self, **kwargs):
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LatticePlatform.__init__(self, "LFE5U-25F-8MG285C", _io, **kwargs)
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