191 lines
7.0 KiB
Python
191 lines
7.0 KiB
Python
# This file is Copyright (c) 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_r0_1 = [
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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("LVCMOS33")),
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Subsignal("g", Pins("T17"), IOStandard("LVCMOS33")),
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Subsignal("b", Pins("J3"), IOStandard("LVCMOS33")),
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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"),
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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("LVCMOS33")
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),
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("spi-internal", 0,
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Subsignal("cs_n", Pins("B11"), Misc("PULLMODE=UP")),
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Subsignal("clk", Pins("C11")),
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Subsignal("miso", Pins("A11"), Misc("PULLMODE=UP")),
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Subsignal("mosi", Pins("A10"), Misc("PULLMODE=UP")),
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Misc("SLEWRATE=SLOW"),
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IOStandard("LVCMOS33"),
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),
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("spisdcard", 0,
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Subsignal("clk", Pins("K1")),
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Subsignal("mosi", Pins("K2"), Misc("PULLMODE=UP")),
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Subsignal("cs_n", Pins("M1"), Misc("PULLMODE=UP")),
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Subsignal("miso", Pins("J1"), Misc("PULLMODE=UP")),
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Misc("SLEW=FAST"),
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IOStandard("LVCMOS33"),
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),
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]
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_io_r0_2 = [
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("clk48", 0, Pins("A9"), IOStandard("LVCMOS33")),
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("rst_n", 0, Pins("V17"), IOStandard("LVCMOS33")),
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("usr_btn", 0, Pins("J17"), IOStandard("SSTL135_I")),
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("rgb_led", 0,
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Subsignal("r", Pins("K4"), IOStandard("LVCMOS33")),
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Subsignal("g", Pins("M3"), IOStandard("LVCMOS33")),
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Subsignal("b", Pins("J3"), IOStandard("LVCMOS33")),
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),
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("ddram", 0,
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Subsignal("a", Pins(
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"C4 D2 D3 A3 A4 D4 C3 B2",
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"B1 D1 A7 C2 B6 C1 A2 C7"),
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IOStandard("SSTL135_I")),
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Subsignal("ba", Pins("D6 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"),
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Misc("TERMINATION=OFF"),
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Misc("DIFFRESISTOR=100")),
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Subsignal("clk_p", Pins("J18"), IOStandard("SSTL135D_I")),
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Subsignal("cke", Pins("D18"), IOStandard("SSTL135_I")),
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Subsignal("odt", Pins("C13"), IOStandard("SSTL135_I")),
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Subsignal("reset_n", Pins("L18"), IOStandard("SSTL135_I")),
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Subsignal("vccio", Pins("K16 D17 K15 K17 B18 C6"), IOStandard("SSTL135_II")),
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Subsignal("gnd", Pins("L15 L16"), IOStandard("SSTL135_II")),
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Misc("SLEWRATE=FAST")
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),
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("usb", 0,
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Subsignal("d_p", Pins("N1")),
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Subsignal("d_n", Pins("M2")),
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Subsignal("pullup", Pins("N2")),
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IOStandard("LVCMOS33")
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),
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("spiflash4x", 0,
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Subsignal("cs_n", Pins("U17"), IOStandard("LVCMOS33")),
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#Subsignal("clk", Pins("U16"), IOStandard("LVCMOS33")),
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Subsignal("dq", Pins("U18 T18 R18 N18"), IOStandard("LVCMOS33")),
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),
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("spiflash", 0,
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Subsignal("cs_n", Pins("U17"), IOStandard("LVCMOS33")),
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#Subsignal("clk", Pins("U16"), IOStandard("LVCMOS33")), # Note: CLK is bound using USRMCLK block
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Subsignal("miso", Pins("T18"), IOStandard("LVCMOS33")),
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Subsignal("mosi", Pins("U18"), IOStandard("LVCMOS33")),
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Subsignal("wp", Pins("R18"), IOStandard("LVCMOS33")),
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Subsignal("hold", Pins("N18"), IOStandard("LVCMOS33")),
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),
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("spisdcard", 0,
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Subsignal("clk", Pins("K1")),
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Subsignal("mosi", Pins("K2"), Misc("PULLMODE=UP")),
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Subsignal("cs_n", Pins("M1"), Misc("PULLMODE=UP")),
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Subsignal("miso", Pins("J1"), Misc("PULLMODE=UP")),
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Misc("SLEW=FAST"),
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IOStandard("LVCMOS33"),
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),
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]
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# Connectors ---------------------------------------------------------------------------------------
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_connectors_r0_1 = [
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# Feather 0.1" Header Pin Numbers,
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# Note: Pin nubering is not continuous.
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("GPIO", "N17 M18 C10 C9 - B10 B9 - - C8 B8 A8 H2 J2 N15 R17 N16 - - - - - - - -"),
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]
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_connectors_r0_2 = [
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# Feather 0.1" Header Pin Numbers,
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# Note: Pin nubering is not continuous.
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("GPIO", "N17 M18 C10 C9 - B10 B9 - - C8 B8 A8 H2 J2 N15 R17 N16 - L4 N3 N4 H4 G4 T17"),
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]
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# Standard Feather Pins
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feather_serial = [
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("serial", 0,
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Subsignal("tx", Pins("GPIO:1"), IOStandard("LVCMOS33")),
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Subsignal("rx", Pins("GPIO:0"), IOStandard("LVCMOS33"))
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)
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]
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feather_i2c = [
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("i2c", 0,
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("sda", Pins("GPIO:2"), IOStandard("LVCMOS33")),
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("scl", Pins("GPIO:3"), IOStandard("LVCMOS33"))
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)
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]
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feather_spi = [
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("spi",0,
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("miso", Pins("GPIO:14"), IOStandard("LVCMOS33")),
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("mosi", Pins("GPIO:16"), IOStandard("LVCMOS33")),
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("sck", Pins("GPIO:15"), 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 = "clk48"
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default_clk_period = 1e9/48e6
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def __init__(self, revision="0.2", device="25F", **kwargs):
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assert revision in ["0.1", "0.2"]
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self.revision = revision
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io = {"0.1": _io_r0_1, "0.2": _io_r0_2 }[revision]
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connectors = {"0.1": _connectors_r0_1, "0.2": _connectors_r0_2}[revision]
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LatticePlatform.__init__(self, f"LFE5U-{device}-8MG285C", io, connectors, **kwargs)
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