121 lines
3.9 KiB
Python
121 lines
3.9 KiB
Python
# This file is Copyright (c) 2018-2019 Florent Kermarrec <florent@enjoy-digital.fr>
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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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from litex.build.lattice.programmer import UJProg
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# IOs ----------------------------------------------------------------------------------------------
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_io = [
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("clk25", 0, Pins("G2"), IOStandard("LVCMOS33")),
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("rst", 0, Pins("R1"), IOStandard("LVCMOS33")),
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("user_led", 0, Pins("B2"), IOStandard("LVCMOS33")),
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("user_led", 1, Pins("C2"), IOStandard("LVCMOS33")),
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("user_led", 2, Pins("C1"), IOStandard("LVCMOS33")),
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("user_led", 3, Pins("D2"), IOStandard("LVCMOS33")),
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("user_led", 4, Pins("D1"), IOStandard("LVCMOS33")),
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("user_led", 5, Pins("E2"), IOStandard("LVCMOS33")),
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("user_led", 6, Pins("E1"), IOStandard("LVCMOS33")),
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("user_led", 7, Pins("H3"), IOStandard("LVCMOS33")),
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("serial", 0,
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Subsignal("tx", Pins("L4"), IOStandard("LVCMOS33")),
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Subsignal("rx", Pins("M1"), IOStandard("LVCMOS33"))
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),
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("spisdcard", 0,
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Subsignal("clk", Pins("J1")),
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Subsignal("mosi", Pins("J3"), Misc("PULLMODE=UP")),
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Subsignal("cs_n", Pins("H1"), Misc("PULLMODE=UP")),
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Subsignal("miso", Pins("K2"), Misc("PULLMODE=UP")),
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Misc("SLEWRATE=FAST"),
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IOStandard("LVCMOS33"),
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),
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("sdcard", 0,
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Subsignal("clk", Pins("J1")),
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Subsignal("cmd", Pins("J3"), Misc("PULLMODE=UP")),
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Subsignal("data", Pins("K2 K1 H2 H1"), Misc("PULLMODE=UP")),
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Misc("SLEWRATE=FAST"),
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IOStandard("LVCMOS33"),
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),
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("sdram_clock", 0, Pins("F19"),
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Misc("PULLMODE=NONE"),
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Misc("DRIVE=4"),
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Misc("SLEWRATE=FAST"),
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IOStandard("LVCMOS33")
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),
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("sdram", 0,
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Subsignal("a", Pins(
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"M20 M19 L20 L19 K20 K19 K18 J20",
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"J19 H20 N19 G20 G19")),
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Subsignal("dq", Pins(
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"J16 L18 M18 N18 P18 T18 T17 U20",
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"E19 D20 D19 C20 E18 F18 J18 J17")),
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Subsignal("we_n", Pins("T20")),
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Subsignal("ras_n", Pins("R20")),
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Subsignal("cas_n", Pins("T19")),
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Subsignal("cs_n", Pins("P20")),
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Subsignal("cke", Pins("F20")),
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Subsignal("ba", Pins("P19 N20")),
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Subsignal("dm", Pins("U19 E20")),
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Misc("PULLMODE=NONE"),
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Misc("DRIVE=4"),
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Misc("SLEWRATE=FAST"),
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IOStandard("LVCMOS33"),
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),
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("wifi_gpio0", 0, Pins("L2"), IOStandard("LVCMOS33")),
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("ext0p", 0, Pins("B11"), IOStandard("LVCMOS33")),
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("ext1p", 0, Pins("A10"), IOStandard("LVCMOS33")),
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("gpio", 0,
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Subsignal("p", Pins("B11")),
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Subsignal("n", Pins("C11")),
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IOStandard("LVCMOS33")
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),
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("gpio", 1,
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Subsignal("p", Pins("A10")),
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Subsignal("n", Pins("A11")),
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IOStandard("LVCMOS33")
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),
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("gpio", 2,
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Subsignal("p", Pins("A9")),
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Subsignal("n", Pins("B10")),
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IOStandard("LVCMOS33")
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),
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("gpio", 3,
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Subsignal("p", Pins("B9")),
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Subsignal("n", Pins("C10")),
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IOStandard("LVCMOS33")
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),
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("usb", 0,
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Subsignal("d_p", Pins("D15")),
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Subsignal("d_n", Pins("E15")),
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Subsignal("pullup", Pins("B12 C12")),
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IOStandard("LVCMOS33")
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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 = "clk25"
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default_clk_period = 1e9/25e6
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def __init__(self, device="LFE5U-45F", **kwargs):
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assert device in ["LFE5U-25F", "LFE5U-45F", "LFE5U-85F"]
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LatticePlatform.__init__(self, device + "-6BG381C", _io, **kwargs)
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def create_programmer(self):
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return UJProg()
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def do_finalize(self, fragment):
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LatticePlatform.do_finalize(self, fragment)
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self.add_period_constraint(self.lookup_request("clk25", loose=True), 1e9/25e6)
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