litex-boards/litex_boards/platforms/ulx3s.py

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# This file is Copyright (c) 2018-2019 Florent Kermarrec <florent@enjoy-digital.fr>
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# License: BSD
from litex.build.generic_platform import *
from litex.build.lattice import LatticePlatform
# IOs ----------------------------------------------------------------------------------------------
_io = [
("clk25", 0, Pins("G2"), IOStandard("LVCMOS33")),
("rst", 0, Pins("R1"), IOStandard("LVCMOS33")),
("user_led", 0, Pins("B2"), IOStandard("LVCMOS33")),
("user_led", 1, Pins("C2"), IOStandard("LVCMOS33")),
("user_led", 2, Pins("C1"), IOStandard("LVCMOS33")),
("user_led", 3, Pins("D2"), IOStandard("LVCMOS33")),
("user_led", 0, Pins("D1"), IOStandard("LVCMOS33")),
("user_led", 1, Pins("E2"), IOStandard("LVCMOS33")),
("user_led", 2, Pins("E1"), IOStandard("LVCMOS33")),
("user_led", 3, Pins("H3"), IOStandard("LVCMOS33")),
("serial", 0,
Subsignal("tx", Pins("L4"), IOStandard("LVCMOS33")),
Subsignal("rx", Pins("M1"), IOStandard("LVCMOS33"))
),
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("spisdcard", 0,
Subsignal("clk", Pins("J1")),
Subsignal("mosi", Pins("J3"), Misc("PULLMODE=UP")),
Subsignal("cs_n", Pins("H1"), Misc("PULLMODE=UP")),
Subsignal("miso", Pins("K2"), Misc("PULLMODE=UP")),
IOStandard("LVCMOS33"), Misc("SLEW=FAST")
),
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("sdram_clock", 0, Pins("F19"), IOStandard("LVCMOS33")),
("sdram", 0,
Subsignal("a", Pins("M20 M19 L20 L19 K20 K19 K18 J20 J19 H20 N19 G20 G19")),
Subsignal("dq", Pins("J16 L18 M18 N18 P18 T18 T17 U20 E19 D20 D19 C20 E18 F18 J18 J17")),
Subsignal("we_n", Pins("T20")),
Subsignal("ras_n", Pins("R20")),
Subsignal("cas_n", Pins("T19")),
Subsignal("cs_n", Pins("P20")),
Subsignal("cke", Pins("F20")),
Subsignal("ba", Pins("P19 N20")),
Subsignal("dm", Pins("U19 E20")),
IOStandard("LVCMOS33"), Misc("SLEWRATE=FAST")
),
("wifi_gpio0", 0, Pins("L2"), IOStandard("LVCMOS33")),
("ext0p", 0, Pins("B11"), IOStandard("LVCMOS33")),
("ext1p", 0, Pins("A10"), IOStandard("LVCMOS33")),
("gpio", 0,
Subsignal("p", Pins("B11")),
Subsignal("n", Pins("C11")),
IOStandard("LVCMOS33")
),
("gpio", 1,
Subsignal("p", Pins("A10")),
Subsignal("n", Pins("A11")),
IOStandard("LVCMOS33")
),
("gpio", 2,
Subsignal("p", Pins("A9")),
Subsignal("n", Pins("B10")),
IOStandard("LVCMOS33")
),
("gpio", 3,
Subsignal("p", Pins("B9")),
Subsignal("n", Pins("C10")),
IOStandard("LVCMOS33")
),
]
# Platform -----------------------------------------------------------------------------------------
class Platform(LatticePlatform):
default_clk_name = "clk25"
default_clk_period = 1e9/25e6
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def __init__(self, device="LFE5U-45F", **kwargs):
LatticePlatform.__init__(self, device + "-6BG381C", _io, **kwargs)