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litex-boards/litex_boards/platforms/gsd_butterstick.py

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Python
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#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2021 Greg Davill <greg.davill@gmail.com>
# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
from litex.build.generic_platform import *
from litex.build.lattice import LatticePlatform
from litex.build.lattice.programmer import OpenOCDJTAGProgrammer
# IOs ----------------------------------------------------------------------------------------------
_io_r1_0 = [
# Clk
("clk30", 0, Pins("B12"), IOStandard("LVCMOS33")),
# Leds
("user_led", 0, Pins("C13"), IOStandard("LVCMOS33")),
("user_led", 1, Pins("D12"), IOStandard("LVCMOS33")),
("user_led", 2, Pins(" U2"), IOStandard("LVCMOS33")),
("user_led", 3, Pins(" T3"), IOStandard("LVCMOS33")),
("user_led", 4, Pins("D13"), IOStandard("LVCMOS33")),
("user_led", 5, Pins("E13"), IOStandard("LVCMOS33")),
("user_led", 6, Pins("C16"), IOStandard("LVCMOS33")),
("user_led_color", 0, Pins("T1 R1 U1"), IOStandard("LVCMOS33")),
# Buttons
("user_btn", 0, Pins("U16"), IOStandard("SSTL135_I")),
("user_btn", 1, Pins("T17"), IOStandard("SSTL135_I")),
# SPIFlash
("spiflash4x", 0,
Subsignal("cs_n", Pins("R2")),
#Subsignal("clk", Pins("U3")),
Subsignal("dq", Pins("W2 V2 Y2 W1")),
IOStandard("LVCMOS33")
),
# SDCard
("spisdcard", 0,
Subsignal("clk", Pins(f"B15")),
Subsignal("mosi", Pins(f"A13"), Misc("PULLMODE=UP")),
Subsignal("cs_n", Pins(f"A14"), Misc("PULLMODE=UP")),
Subsignal("miso", Pins(f"C12"), Misc("PULLMODE=UP")),
Misc("SLEWRATE=FAST"),
IOStandard("LVCMOS33"),
),
("sdcard", 0,
Subsignal("data", Pins("C12 A12 D14 A14"), Misc("PULLMODE=UP")),
Subsignal("cmd", Pins("A13"), Misc("PULLMODE=UP")),
Subsignal("clk", Pins("B13")),
Subsignal("cd", Pins("B15"), Misc("PULLMODE=UP")),
Misc("SLEWRATE=FAST"),
IOStandard("LVCMOS33"),
),
# DDR3 SDRAM
("ddram", 0,
Subsignal("a", Pins(
"G16 E19 E20 F16 F19 E16 F17 L20 "
"M20 E18 G18 D18 H18 C18 D17 G20 "),
IOStandard("SSTL135_I")),
Subsignal("ba", Pins("H16 F20 H20"), IOStandard("SSTL135_I")),
Subsignal("ras_n", Pins("K18"), IOStandard("SSTL135_I")),
Subsignal("cas_n", Pins("J17"), IOStandard("SSTL135_I")),
Subsignal("we_n", Pins("G19"), IOStandard("SSTL135_I")),
Subsignal("cs_n", Pins("J20 J16"), IOStandard("SSTL135_I")),
Subsignal("dm", Pins("U20 L18"), IOStandard("SSTL135_I")),
Subsignal("dq", Pins(
"U19 T18 U18 R20 P18 P19 P20 N20",
"L19 L17 L16 R16 N18 R17 N17 P17"),
IOStandard("SSTL135_I"),
Misc("TERMINATION=75")),
Subsignal("dqs_p", Pins("T19 N16"), IOStandard("SSTL135D_I"),
Misc("TERMINATION=OFF"),
Misc("DIFFRESISTOR=100")),
Subsignal("clk_p", Pins("C20 J19"), IOStandard("SSTL135D_I")),
Subsignal("cke", Pins("F18 J18"), IOStandard("SSTL135_I")),
Subsignal("odt", Pins("K20 H17"), IOStandard("SSTL135_I")),
Subsignal("reset_n", Pins("E17"), IOStandard("SSTL135_I")),
Misc("SLEWRATE=FAST")
),
("vccio_ctrl", 0,
Subsignal("pdm", Pins("V1 E11 T2")),
Subsignal("en", Pins("E12"))
),
# RGMII Ethernet
("eth_clocks", 0,
Subsignal("tx", Pins("E15")),
Subsignal("rx", Pins("D11")),
IOStandard("LVCMOS33"),
Misc("SLEWRATE=FAST"),
),
("eth", 0,
Subsignal("rst_n", Pins("B20")),
Subsignal("mdio", Pins("D16")),
Subsignal("mdc", Pins("A19")),
Subsignal("rx_data", Pins("A16 C17 B17 A17")),
Subsignal("tx_ctl", Pins("D15")),
Subsignal("rx_ctl", Pins("B18")),
Subsignal("tx_data", Pins("C15 B16 A18 B19")),
IOStandard("LVCMOS33"),
Misc("SLEWRATE=FAST")
),
("ulpi", 0,
Subsignal("data", Pins("B9 C6 A7 E9 A8 D9 C10 C7")),
Subsignal("clk", Pins("B6")),
Subsignal("dir", Pins("A6")),
Subsignal("nxt", Pins("B8")),
Subsignal("stp", Pins("C8")),
Subsignal("rst", Pins("C9")),
IOStandard("LVCMOS18"),Misc("SLEWRATE=FAST")
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors_r1_0 = [
("SYZYGY0", {
# single ended
"S0": "G2", "S1": "J3",
"S2": "F1", "S3": "K3",
"S4": "J4", "S5": "K2",
"S6": "J5", "S7": "J1",
"S8": "N2", "S9": "L3",
"S10":"M1", "S11":"L2",
"S12":"N3", "S13":"N4",
"S14":"M3", "S15":"P5",
"S16":"H1", "S17":"K5",
"S18":"K4", "S19":"K1",
"S20":"L4", "S21":"L1",
"S22":"L5", "S23":"M4",
"S24":"N1", "S25":"N5",
"S26":"P3", "S27":"P4",
"S28":"H2", "S29":"P1",
"S30":"G1", "S31":"P2",
}
),
("SYZYGY1", {
# single ended
"S0": "E4", "S1": "A4",
"S2": "D5", "S3": "A5",
"S4": "C4", "S5": "B2",
"S6": "B4", "S7": "C2",
"S8": "A2", "S9": "C1",
"S10":"B1", "S11":"D1",
"S12":"F4", "S13":"D2",
"S14":"E3", "S15":"E1",
"S16":"B5", "S17":"E5",
"S18":"F5", "S19":"C5",
"S20":"B3", "S21":"A3",
"S22":"D3", "S23":"C3",
"S24":"H5", "S25":"G5",
"S26":"H3", "S27":"H4",
"S28":"G3", "S29":"F2",
"S30":"F3", "S31":"E2",
}
),
("SYZYGY2", {
# single ended
"S0": "C11", "S1": "B11",
"S2": "D6", "S3": "D7",
"S4": "E6", "S5": "E7",
"S6": "D8", "S7": "E8",
"S8": "E10", "S9": "D10",
"S10":"A9", "S11":"A10",
"S12":"B10", "S13":"A11"
}
),
]
# SYZYGY -------------------------------------------------------------------------------------------
def raw_syzygy_io(syzygy, iostandard="LVCMOS33"):
return [(syzygy, 0, Pins(" ".join([f"{syzygy}:S{i:d}" for i in range(32)])), IOStandard(iostandard))]
# Platform -----------------------------------------------------------------------------------------
class Platform(LatticePlatform):
default_clk_name = "clk30"
default_clk_period = 1e9/30e6
def __init__(self, revision="1.0", device="85F", toolchain="trellis", **kwargs):
assert revision in ["1.0"]
assert device in ["25F", "45F", "85F"]
self.revision = revision
io = {"1.0": _io_r1_0}[revision]
connectors = {"1.0": _connectors_r1_0}[revision]
LatticePlatform.__init__(self, f"LFE5UM5G-{device}-8BG381C", io, connectors, toolchain=toolchain, **kwargs)
def create_programmer(self):
return OpenOCDJTAGProgrammer("openocd_butterstick.cfg")
def do_finalize(self, fragment):
LatticePlatform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk30", loose=True), 1e9/30e6)
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