85 lines
3.3 KiB
Python
85 lines
3.3 KiB
Python
# This file is Copyright (c) 2019 Greg Davill <greg.davill@gmail.com>
|
|
# License: BSD
|
|
|
|
from litex.build.generic_platform import *
|
|
from litex.build.lattice import LatticePlatform
|
|
|
|
# IOs ----------------------------------------------------------------------------------------------
|
|
|
|
_io = [
|
|
("clk100", 0, Pins("A9"), IOStandard("LVCMOS33")),
|
|
("rst_n", 0, Pins("R16"), IOStandard("LVCMOS25")),
|
|
|
|
("rgb_led", 0,
|
|
Subsignal("r", Pins("V17"), IOStandard("LVCMOS25")),
|
|
Subsignal("g", Pins("T17"), IOStandard("LVCMOS25")),
|
|
Subsignal("b", Pins("J3"), IOStandard("LVCMOS33")),
|
|
)
|
|
|
|
("serial", 0,
|
|
Subsignal("tx", Pins("N17"), IOStandard("LVCMOS25")),
|
|
Subsignal("rx", Pins("M18"), IOStandard("LVCMOS25")),
|
|
),
|
|
|
|
("ddram", 0,
|
|
Subsignal("a", Pins(
|
|
"A4 D2 C3 C7 D3 D4 D1 B2",
|
|
"C1 A2 A7 C2 C4"),
|
|
IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("ba", Pins("B6 B7 A6"), IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("ras_n", Pins("C12"), IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("cas_n", Pins("D13"), IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("we_n", Pins("B12"), IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("cs_n", Pins("A12"), IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("dm", Pins("D16 G16"), IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("dq", Pins(
|
|
"C17 D15 B17 C16 A15 B13 A17 A13",
|
|
"F17 F16 G15 F15 J16 C18 H16 F18"),
|
|
IOStandard("SSTL135_I"),
|
|
Misc("TERMINATION=75 SLEWRATE=FAST")),
|
|
Subsignal("dqs_p", Pins("B15 G18"), IOStandard("SSTL135D_I"), Misc("TERMINATION=OFF DIFFRESISTOR=100 SLEWRATE=FAST")),
|
|
Subsignal("clk_p", Pins("J18"), IOStandard("SSTL135D_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("cke", Pins("D6"), IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("odt", Pins("C13"), IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("reset_n", Pins("B1"), IOStandard("SSTL135_I"),Misc("SLEWRATE=FAST")),
|
|
Subsignal("vccio", Pins("D18 K16 B18 D17 K15 K17 C6 A3"), IOStandard("SSTL135_II"), Misc("DRIVE=10")),
|
|
Subsignal("gnd", Pins("L18 L15 L16"), IOStandard("SSTL135_II"), Misc("DRIVE=10")),
|
|
Misc("SLEWRATE=FAST")
|
|
),
|
|
|
|
|
|
("spiflash4x", 0,
|
|
Subsignal("cs_n", Pins("U17")),
|
|
Subsignal("clk", Pins("U16")),
|
|
Subsignal("dq", Pins("U18", "T18", "R18", "N18")),
|
|
IOStandard("LVCMOS25")
|
|
),
|
|
#("spiflash", 0,
|
|
# Subsignal("cs_n", Pins("U17")),
|
|
# Subsignal("clk", Pins("U16")),
|
|
# Subsignal("mosi", Pins("U18")),
|
|
# Subsignal("miso", Pins("T18")),
|
|
# Subsignal("wp", Pins("R18")),
|
|
# Subsignal("hold", Pins("N18")),
|
|
# IOStandard("LVCMOS25"),
|
|
#),
|
|
|
|
]
|
|
|
|
|
|
|
|
# Connectors ---------------------------------------------------------------------------------------
|
|
|
|
_connectors = [
|
|
]
|
|
|
|
# Platform -----------------------------------------------------------------------------------------
|
|
|
|
class Platform(LatticePlatform):
|
|
default_clk_name = "clk48"
|
|
default_clk_period = int(1e9/48e6)
|
|
|
|
def __init__(self, **kwargs):
|
|
LatticePlatform.__init__(self, "LFE5U-25F-8MG285C", _io, _connectors, **kwargs)
|
|
|