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litex-boards/litex_boards/platforms/gsd_orangecrab.py

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#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2020 Greg Davill <greg.davill@gmail.com>
# SPDX-License-Identifier: BSD-2-Clause
from litex.build.generic_platform import *
from litex.build.lattice import LatticeECP5Platform
from litex.build.dfu import DFUProg
# IOs ----------------------------------------------------------------------------------------------
_io_r0_1 = [
# Clk / Rst
("clk48", 0, Pins("A9"), IOStandard("LVCMOS33")),
("rst_n", 0, Pins("R16"), IOStandard("LVCMOS33")),
# Leds
("user_led", 0, Pins("V17"), IOStandard("LVCMOS33")), # rgb_led.r
("user_led", 1, Pins("T17"), IOStandard("LVCMOS33")), # rgb_led.g
("user_led", 2, Pins("J3"), IOStandard("LVCMOS33")), # rgb_led.b
("rgb_led", 0,
Subsignal("r", Pins("V17"), IOStandard("LVCMOS33")),
Subsignal("g", Pins("T17"), IOStandard("LVCMOS33")),
Subsignal("b", Pins("J3"), IOStandard("LVCMOS33")),
),
# DDR3 SDRAM
("ddram", 0,
Subsignal("a", Pins(
"A4 D2 C3 C7 D3 D4 D1 B2",
"C1 A2 A7 C2 C4"),
IOStandard("SSTL135_I")),
Subsignal("ba", Pins("B6 B7 A6"), IOStandard("SSTL135_I")),
Subsignal("ras_n", Pins("C12"), IOStandard("SSTL135_I")),
Subsignal("cas_n", Pins("D13"), IOStandard("SSTL135_I")),
Subsignal("we_n", Pins("B12"), IOStandard("SSTL135_I")),
Subsignal("cs_n", Pins("A12"), IOStandard("SSTL135_I")),
Subsignal("dm", Pins("D16 G16"), IOStandard("SSTL135_I")),
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")),
Subsignal("dqs_p", Pins("B15 G18"), IOStandard("SSTL135D_I"),
Misc("TERMINATION=OFF DIFFRESISTOR=100")),
Subsignal("clk_p", Pins("J18"), IOStandard("SSTL135D_I")),
Subsignal("cke", Pins("D6"), IOStandard("SSTL135_I")),
Subsignal("odt", Pins("C13"), IOStandard("SSTL135_I")),
Subsignal("reset_n", Pins("B1"), IOStandard("SSTL135_I")),
Misc("SLEWRATE=FAST")
),
# USB
("usb", 0,
Subsignal("d_p", Pins("N1")),
Subsignal("d_n", Pins("M2")),
Subsignal("pullup", Pins("N2")),
IOStandard("LVCMOS33")
),
# SPIFlash
("spiflash4x", 0,
Subsignal("cs_n", Pins("U17")),
#Subsignal("clk", Pins("U16")),
Subsignal("dq", Pins("U18 T18 R18 N18")),
IOStandard("LVCMOS33")
),
# SPI
("spi-internal", 0,
Subsignal("cs_n", Pins("B11"), Misc("PULLMODE=UP")),
Subsignal("clk", Pins("C11")),
Subsignal("miso", Pins("A11"), Misc("PULLMODE=UP")),
Subsignal("mosi", Pins("A10"), Misc("PULLMODE=UP")),
Misc("SLEWRATE=SLOW"),
IOStandard("LVCMOS33"),
),
# SDCard
("spisdcard", 0,
Subsignal("clk", Pins("K1")),
Subsignal("mosi", Pins("K2"), Misc("PULLMODE=UP")),
Subsignal("cs_n", Pins("M1"), Misc("PULLMODE=UP")),
Subsignal("miso", Pins("J1"), Misc("PULLMODE=UP")),
Misc("SLEWRATE=FAST"),
IOStandard("LVCMOS33"),
),
]
_io_r0_2 = [
# Clk / Rst
("clk48", 0, Pins("A9"), IOStandard("LVCMOS33")),
("rst_n", 0, Pins("V17"), IOStandard("LVCMOS33")),
# Buttons
("usr_btn", 0, Pins("J17"), IOStandard("SSTL135_I")),
# Leds
("user_led", 0, Pins("K4"), IOStandard("LVCMOS33")), # rgb_led.r
("user_led", 1, Pins("M3"), IOStandard("LVCMOS33")), # rgb_led.g
("user_led", 2, Pins("J3"), IOStandard("LVCMOS33")), # rgb_led.b
("rgb_led", 0,
Subsignal("r", Pins("K4"), IOStandard("LVCMOS33")),
Subsignal("g", Pins("M3"), IOStandard("LVCMOS33")),
Subsignal("b", Pins("J3"), IOStandard("LVCMOS33")),
),
# DDR3 SDRAM
("ddram", 0,
Subsignal("a", Pins(
"C4 D2 D3 A3 A4 D4 C3 B2",
"B1 D1 A7 C2 B6 C1 A2 C7"),
IOStandard("SSTL135_I")),
Subsignal("ba", Pins("D6 B7 A6"), IOStandard("SSTL135_I"),),
Subsignal("ras_n", Pins("C12"), IOStandard("SSTL135_I")),
Subsignal("cas_n", Pins("D13"), IOStandard("SSTL135_I")),
Subsignal("we_n", Pins("B12"), IOStandard("SSTL135_I")),
Subsignal("cs_n", Pins("A12"), IOStandard("SSTL135_I")),
Subsignal("dm", Pins("D16 G16"), IOStandard("SSTL135_I")),
Subsignal("dq", Pins(
"C17 D15 B17 C16 A15 B13 A17 A13",
"F17 F16 G15 F15 J16 C18 H16 F18"),
IOStandard("SSTL135_I"),
Misc("TERMINATION=OFF")), # Misc("TERMINATION=75") Disabled to reduce heat
Subsignal("dqs_p", Pins("B15 G18"), IOStandard("SSTL135D_I"),
Misc("TERMINATION=OFF"),
Misc("DIFFRESISTOR=100")),
Subsignal("clk_p", Pins("J18"), IOStandard("SSTL135D_I")),
Subsignal("cke", Pins("D18"), IOStandard("SSTL135_I")),
Subsignal("odt", Pins("C13"), IOStandard("SSTL135_I")),
Subsignal("reset_n", Pins("L18"), IOStandard("SSTL135_I")),
Subsignal("vccio", Pins("K16 D17 K15 K17 B18 C6"), IOStandard("SSTL135_II")),
Subsignal("gnd", Pins("L15 L16"), IOStandard("SSTL135_II")),
Misc("SLEWRATE=FAST")
),
# USB
("usb", 0,
Subsignal("d_p", Pins("N1")),
Subsignal("d_n", Pins("M2")),
Subsignal("pullup", Pins("N2")),
IOStandard("LVCMOS33")
),
# SPIFlash
("spiflash4x", 0,
Subsignal("cs_n", Pins("U17"), IOStandard("LVCMOS33")),
#Subsignal("clk", Pins("U16"), IOStandard("LVCMOS33")),
Subsignal("dq", Pins("U18 T18 R18 N18"), IOStandard("LVCMOS33")),
),
("spiflash", 0,
Subsignal("cs_n", Pins("U17"), IOStandard("LVCMOS33")),
#Subsignal("clk", Pins("U16"), IOStandard("LVCMOS33")), # Note: CLK is bound using USRMCLK block
Subsignal("miso", Pins("T18"), IOStandard("LVCMOS33")),
Subsignal("mosi", Pins("U18"), IOStandard("LVCMOS33")),
Subsignal("wp", Pins("R18"), IOStandard("LVCMOS33")),
Subsignal("hold", Pins("N18"), IOStandard("LVCMOS33")),
),
# SDCard
("spisdcard", 0,
Subsignal("clk", Pins("K1")),
Subsignal("mosi", Pins("K2"), Misc("PULLMODE=UP")),
Subsignal("cs_n", Pins("M1"), Misc("PULLMODE=UP")),
Subsignal("miso", Pins("J1"), Misc("PULLMODE=UP")),
Misc("SLEWRATE=FAST"),
IOStandard("LVCMOS33"),
),
("sdcard", 0,
Subsignal("clk", Pins("K1")),
Subsignal("cmd", Pins("K2"), Misc("PULLMODE=UP")),
Subsignal("data", Pins("J1 K3 L3 M1"), Misc("PULLMODE=UP")),
IOStandard("LVCMOS33"), Misc("SLEWRATE=FAST")
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors_r0_1 = [
# Feather 0.1" Header Pin Numbers,
# Note: Pin nubering is not continuous.
("GPIO", "N17 M18 C10 C9 - B10 B9 - - C8 B8 A8 H2 J2 N15 R17 N16 - - - - - - - -"),
]
_connectors_r0_2 = [
# Feather 0.1" Header Pin Numbers,
# Note: Pin nubering is not continuous.
("GPIO", "N17 M18 C10 C9 - B10 B9 - - C8 B8 A8 H2 J2 N15 R17 N16 - L4 N3 N4 H4 G4 T17"),
]
# Standard Feather Pins
feather_serial = [
("serial", 0,
Subsignal("tx", Pins("GPIO:1"), IOStandard("LVCMOS33")),
Subsignal("rx", Pins("GPIO:0"), IOStandard("LVCMOS33"))
)
]
feather_i2c = [
("i2c", 0,
Subsignal("sda", Pins("GPIO:2"), IOStandard("LVCMOS33")),
Subsignal("scl", Pins("GPIO:3"), IOStandard("LVCMOS33"))
)
]
feather_spi = [
("spi", 0,
Subsignal("miso", Pins("GPIO:14"), IOStandard("LVCMOS33")),
Subsignal("mosi", Pins("GPIO:16"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("GPIO:15"), IOStandard("LVCMOS33"))
)
]
# Platform -----------------------------------------------------------------------------------------
class Platform(LatticeECP5Platform):
default_clk_name = "clk48"
default_clk_period = 1e9/48e6
def __init__(self, revision="0.2", device="25F", toolchain="trellis", **kwargs):
assert revision in ["0.1", "0.2"]
assert device in ["25F", "45F", "85F"]
self.revision = revision
io = {"0.1": _io_r0_1, "0.2": _io_r0_2 }[revision]
connectors = {"0.1": _connectors_r0_1, "0.2": _connectors_r0_2}[revision]
LatticeECP5Platform.__init__(self, f"LFE5U-{device}-8MG285C", io, connectors, toolchain=toolchain, **kwargs)
def create_programmer(self):
return DFUProg(vid="1209", pid="5af0", alt=0)
def do_finalize(self, fragment):
LatticeECP5Platform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk48", loose=True), 1e9/48e6)
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